CN112140291A - Automatic opening and closing device for end side mold of production line duct piece mold - Google Patents
Automatic opening and closing device for end side mold of production line duct piece mold Download PDFInfo
- Publication number
- CN112140291A CN112140291A CN202011036989.3A CN202011036989A CN112140291A CN 112140291 A CN112140291 A CN 112140291A CN 202011036989 A CN202011036989 A CN 202011036989A CN 112140291 A CN112140291 A CN 112140291A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
- B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
- B28B7/0055—Mould pallets; Mould panels
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an automatic opening and closing device for an end side mold of an assembly line duct piece mold, which comprises an end mold opening and closing structure, a side mold opening and closing structure, a connecting rod structure and a rotary support structure, wherein the connecting rod structure is connected to an end mold supporting leg, the rotary support is connected to the bottom of the side mold supporting leg, the end mold opening and closing structure is positioned below the connecting rod structure, and the side mold opening and closing structure is positioned below the rotary support structure. The end mould structure that opens and shuts is the same with the side form structure that opens and shuts, and end mould structure that opens and shuts includes first fixing base, and the bottom of first fixing base articulates there is first cylinder, and the top of first fixing base articulates there is first hydro-cylinder, and it has first cassette to articulate on the first cylinder, and it has U type draw-in groove to open on the first cassette, and the piston rod fixed connection of first hydro-cylinder is at the lateral part of first cassette. The end die opening and closing structure, the connecting rod structure and the end die supporting legs are matched to complete automatic opening and closing of the end die, the side die opening and closing structure, the rotary support structure and the side die supporting legs are matched to complete automatic opening and closing of the side die, and automatic opening and closing of the end die and the side die are really achieved.
Description
Technical Field
The invention relates to the field of opening and closing of end side molds of duct piece molds, in particular to an automatic opening and closing device for the end side molds of a duct piece mold of an assembly line.
Background
At the segment mould in the current market, the end mould is opened and closed in a hinged rotary mode, and the side mould is opened and closed in a horizontal translation mode and in a hinged rotary mode. The side die is hinged with a rotary opening and closing structure, a screw is driven to rotate forwards and backwards, the screw is rotated manually, the operation is slow and unstable, most enterprises adopt electric or pneumatic wrenches to operate at present, the impact is large when the die is opened and closed, and the die is damaged greatly; the end dies are driven by the screw rods to open and close, the end dies are hinged with the side dies to rotate to open and close, the same defects exist, the opening and closing operation needs to be performed by squatting due to the spatial positions of the end dies, and particularly, the dies with cover plates are limited in operation space and very inconvenient to operate; most of the translational side molds are opened and closed without a driving device by manual pushing and pulling, and the mold opening is laborious due to factors such as the resistance of a translation mechanism, the adhesion of concrete and the mold and the like during mold opening, a crowbar is required for mold opening in serious cases, and the side molds and a chassis, and the side molds and an end mold are easily damaged by collision caused by over-violent force during mold closing.
The existing mold opening and closing mode, whether manual or electric or pneumatic, needs manual work to operate and depends on manpower, increases the manual work operation amount and labor intensity when the productivity of the duct piece is larger, and simultaneously causes manual misoperation easily because of differences of manual force and the like.
Disclosure of Invention
Aiming at the problems of the existing duct piece mould opening and closing mode, the invention provides an automatic opening and closing device for an end side mould of a production line duct piece mould.
The invention adopts the following technical scheme:
an automatic opening and closing device for end side molds of an assembly line duct piece mold comprises a chassis, wherein a bottom mold is arranged on the chassis, end molds are transversely arranged at the front end and the rear end of the bottom mold, end mold supporting legs are arranged on the end molds, side molds are longitudinally arranged on the left side and the right side of the bottom mold, side mold supporting legs are arranged on the side molds, the automatic opening and closing device comprises an end mold opening and closing structure, a side mold opening and closing structure, a connecting rod structure and a rotary support structure, the connecting rod structure is connected to the end mold supporting legs, the rotary support is connected to the bottoms of the side mold supporting legs, the end mold opening and closing structure is positioned below the connecting rod structure, and the side mold opening and closing structure is positioned below;
the end mold opening and closing structure comprises a first fixed seat, wherein the bottom of the first fixed seat is hinged with a first air cylinder, the top of the first fixed seat is hinged with a first oil cylinder, a piston rod of the first air cylinder is hinged with a first clamping seat, the first clamping seat is provided with a U-shaped clamping groove, and a piston rod of the first oil cylinder is fixedly connected to the side part of the first clamping seat;
the side mold opening and closing structure comprises a second fixing seat, a second air cylinder is hinged to the bottom of the second fixing seat, a second oil cylinder is hinged to the top of the second fixing seat, a piston rod of the second air cylinder is hinged to a second clamping seat, a U-shaped clamping groove is formed in the second clamping seat, and a piston rod of the second oil cylinder is fixedly connected to the side portion of the second clamping seat.
Preferably, the bottom ends of the end mold supporting legs are hinged to the chassis, the connecting rod structure comprises a connecting plate assembly and a driving plate assembly, one end of the connecting plate assembly is hinged to the middle of the end mold supporting legs, the other end of the connecting plate assembly is hinged to the driving plate assembly, the middle of the driving plate assembly is hinged to a supporting seat, and the supporting seat is fixed to the chassis;
the connecting plate assembly comprises a left connecting plate and a right connecting plate which are connected together, one ends of the two connecting plates are hinged to the middle part of the end die supporting leg, and the other ends of the two connecting plates are hinged to the top of the driving assembly; the driving assembly comprises two driving plates, the two driving plates are connected together, the middle parts of the driving plates are bent, the middle bending parts of the two driving plates are hinged to the supporting seat, the driving shafts are arranged at the bottoms of the two driving plates, and the end die opening and closing structure is located below the driving shafts.
Preferably, when the piston rod of first cylinder stretches out, drive first cassette and shift up, the U type draw-in groove of first cassette can block in the drive shaft, and the piston rod of first hydro-cylinder drives the drive shaft through first cassette and removes to drive assembly and rotate around the supporting seat, drive the end mould landing leg through the connecting plate subassembly and rotate.
Preferably, the rotary support structure comprises a support, the upper part of the support is fixedly connected with the lower part of the side mold supporting leg, a hinge seat is hinged to the support and fixed on the bottom mold, a rotating shaft is arranged at the bottom of the support, and the side mold opening and closing structure is located below the rotating shaft.
Preferably, when the piston rod of second cylinder stretches out, drive the second cassette and shift up, the U type draw-in groove of second cassette can block on the rotation axis, and the piston rod of second hydro-cylinder drives the rotation axis through the second cassette and removes to drive rotatory support structure and side form landing leg and rotate.
The invention has the beneficial effects that:
according to the automatic opening and closing device for the end side die of the pipeline segment die, the end die opening and closing structure, the connecting rod structure and the end die supporting legs are matched to complete automatic opening and closing of the end die, and the side die opening and closing structure, the rotary support structure and the side die supporting legs are matched to complete automatic opening and closing of the side die, so that automatic opening and closing of the end die and the side die are really realized, the labor intensity of field operators is effectively reduced, and the die is prevented from being damaged during die closing.
Drawings
Fig. 1 is a perspective view of an automatic opening and closing device for an end side die of a flow line segment die.
Fig. 2 is a front view of the automatic opening and closing device for the end side mold of the production line segment mold.
FIG. 3 is a schematic view of an end mold opening and closing configuration and a connecting rod configuration.
Fig. 4 is a schematic view of a side mold opening and closing structure and a rotary support structure.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
with reference to fig. 1 to 4, the duct piece mold comprises a chassis 1, a bottom mold 4 is arranged on the chassis, end molds 2 are transversely arranged at the front end and the rear end of the bottom mold, end mold supporting legs 3 are arranged on the end molds, side molds 5 are longitudinally arranged on the left side and the right side of the bottom mold, and side mold supporting legs 6 are arranged on the side molds.
The utility model provides an automatic device that opens and shuts of assembly line section of jurisdiction mould end side form, includes end mould structure, side mould structure, connecting rod structure and the rotating support structure that opens and shuts, and connecting rod structure connects on end mould landing leg 3, and the rotating support is connected and is located connecting rod structure's below at the bottom end mould structure that opens and shuts of side mould landing leg 6, and the side mould structure that opens and shuts is located the below of rotating support structure.
The structure of the end mold opening and closing structure is completely the same as that of the side mold opening and closing structure.
The end mold opening and closing structure comprises a first fixing seat 7, a first air cylinder 8 is hinged to the bottom of the first fixing seat, a first oil cylinder 9 is hinged to the top of the first fixing seat, a piston rod of the first air cylinder is hinged to a first clamping seat 10, a U-shaped clamping groove 11 is formed in the first clamping seat, and the piston rod of the first oil cylinder is fixedly connected to the side portion of the first clamping seat.
The side mold opening and closing structure comprises a second fixing seat 12, a second air cylinder 13 is hinged to the bottom of the second fixing seat, a second oil cylinder 14 is hinged to the top of the second fixing seat, a piston rod of the second air cylinder is hinged to a second clamping seat 15, a U-shaped clamping groove 16 is formed in the second clamping seat, and a piston rod of the second oil cylinder is fixedly connected to the side portion of the second clamping seat.
An approach travel switch is arranged in the U-shaped clamping groove.
As shown in fig. 1 and 3, the bottom ends of the end mold supporting legs are hinged on the chassis 1, the connecting rod structure comprises a connecting plate assembly 17 and a driving plate assembly 18, one end of the connecting plate assembly is hinged in the middle of the end mold supporting legs 3, the other end of the connecting plate assembly is hinged with the driving plate assembly, the middle of the driving plate assembly is hinged with a supporting seat 19, and the supporting seat is fixed on the chassis.
The connecting plate subassembly includes two connecting plates 20 about, and two connecting plates link together, and the one end of two connecting plates articulates the middle part at the end mould landing leg, and the other end of two connecting plates articulates the top at drive assembly.
The driving assembly comprises two driving plates 21 which are connected together, the middle parts of the driving plates are bent, the bent parts of the middle parts of the two driving plates are hinged to the supporting seat 19, the driving shafts 22 are arranged at the bottoms of the two driving plates, and the end mold opening and closing structure is located below the driving shafts.
The matching process of the end mold opening and closing structure and the connecting rod structure is approximately:
when the piston rod of first cylinder 8 stretches out, drive first cassette 10 and move up, the U type draw-in groove of first cassette can block in the drive shaft, and later the piston rod of first hydro-cylinder drives the drive shaft through first cassette and removes to drive assembly and rotate around the supporting seat, further drive the end mould landing leg through connecting plate subassembly and rotate, thereby realize the automation of end mould and open and shut.
The rotary support structure comprises a support 23, the upper part of the support is fixedly connected with the lower part of the side mold supporting leg 6, a hinge seat 24 is hinged on the support and fixed on the bottom mold 4, a rotating shaft 25 is arranged at the bottom of the support, and the side mold opening and closing structure is positioned below the rotating shaft.
The matching process of the side mold opening and closing structure and the rotary support structure is approximately as follows:
when the piston rod of the second cylinder 13 stretches out, the second clamping seat 15 is driven to move upwards, the U-shaped clamping groove of the second clamping seat can be clamped on the rotating shaft, the piston rod of the second oil cylinder drives the rotating shaft to move through the second clamping seat, and therefore the rotary support structure and the side mold supporting legs are driven to rotate, and the side mold can be automatically opened and closed.
Actually, on the assembly line, there are die opening station and compound die station, the die opening action is accomplished on respective station with the compound die action, there are 4 end mould open and close structures (two respectively at the front and back end) and 4 side form open and close structures (two respectively on the left and right sides) at the die opening station, there are 4 end mould open and close structures (two respectively at the front and back end) and 4 side form open and close structures (two respectively on the left and right sides) at the compound die station, the pipe sheet mould moves between die opening station and compound die station on the assembly line, accomplish automatic die opening and automatic compound die.
The following describes the automatic mold opening process and the automatic mold closing process in detail:
the mold opening process comprises:
when the duct piece mold reaches the mold opening station, the two cross beams of the mold chassis are locked through the hydraulic system, so that the mold is accurately locked and positioned, and the end mold opening and closing structure and the side mold opening and closing structure can be accurately opened.
Firstly, side mold opening is carried out, a piston rod of a second cylinder 13 extends out to drive a second clamping seat 15 to move upwards, a U-shaped clamping groove of the second clamping seat is clamped on a rotating shaft, whether the U-shaped clamping groove is clamped on the rotating shaft is detected by a proximity travel switch, the piston rod of the second cylinder 13 stops acting after the U-shaped clamping groove is clamped on the rotating shaft, then a fastening bolt of the side mold is loosened, at the moment, a second oil cylinder needs to be pressed to keep a mold closing state, the side mold is guaranteed not to be automatically opened due to gravity, a control button is pressed, the piston rod of the second oil cylinder extends out, the rotating shaft is driven to move through the second clamping seat, a rotary support structure and a support leg of the side mold are driven to rotate, the side mold is opened, oil cylinder pressure detection reaches a designated value, opening action stops, the piston rod of the second cylinder descends, the U.
Then, the end mold is opened, a piston rod of the first air cylinder 8 extends out to drive the first clamping seat 10 to move upwards, so that the U-shaped clamping groove of the first clamping seat is clamped on the driving shaft, whether the U-shaped clamping groove is clamped on the driving shaft is detected by the proximity travel switch, the piston rod of the first air cylinder stops acting after the U-shaped clamping groove is clamped on the driving shaft, then a fastening bolt of the end mold is loosened, the piston rod of the first oil cylinder at the moment is in an extending state, the piston rod of the first oil cylinder retracts, the driving shaft is driven to move through the first clamping seat, the driving assembly is driven to rotate around the supporting seat, the end mold supporting legs are further driven to rotate through the connecting plate assembly, the piston rod of the first oil cylinder retracts in place, the opening action stops, the piston rod of the first air.
A mold closing process:
when the duct piece mold reaches the mold closing station, the two cross beams of the mold chassis are locked through the hydraulic system, so that the mold is accurately locked and positioned, and the end mold opening and closing structure and the side mold opening and closing structure can be accurately closed.
The method comprises the steps of firstly carrying out end mold closing, extending a piston rod of a first air cylinder 8, driving a first clamping seat 10 to move upwards, enabling a U-shaped clamping groove of the first clamping seat to be clamped on a driving shaft, detecting whether the U-shaped clamping groove is clamped on the driving shaft through a proximity travel switch, stopping the piston rod of the first air cylinder after the U-shaped clamping groove is clamped on the driving shaft, extending the piston rod of a first oil cylinder, driving the driving shaft to move through the first clamping seat, driving a driving assembly to rotate around a supporting seat, further driving end mold supporting legs to rotate through a connecting plate assembly, detecting the pressure of the oil cylinder, and keeping a mold closing state when the pressure of the oil cylinder is detected, screwing a fastening bolt of an end mold, descending the piston rod of the first air cylinder, separating the U-shaped clamping groove from the.
And then performing side mold closing, wherein a piston rod of the second cylinder 13 extends out to drive the second clamping seat 15 to move upwards, so that a U-shaped clamping groove of the second clamping seat is clamped on a rotating shaft, whether the U-shaped clamping groove is clamped on the rotating shaft is detected by a proximity travel switch, the U-shaped clamping groove is clamped on the rotating shaft, the piston rod of the second cylinder at the moment is in an extending state, the piston rod of the second cylinder retracts, the rotating shaft is driven to move through the second clamping seat, a rotary support structure and side mold supporting legs are driven to rotate, the side mold is closed, the second cylinder keeps a mold closing state, fastening bolts of the side mold are tightened, the piston rod of the second cylinder descends, the U-shaped clamping groove is separated from the rotating shaft.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (5)
1. An automatic opening and closing device for end side molds of an assembly line duct piece mold comprises a chassis, wherein a bottom mold is arranged on the chassis, end molds are transversely arranged at the front end and the rear end of the bottom mold, end mold supporting legs are arranged on the end molds, side molds are longitudinally arranged on the left side and the right side of the bottom mold, and side mold supporting legs are arranged on the side molds;
the end mold opening and closing structure comprises a first fixed seat, wherein the bottom of the first fixed seat is hinged with a first air cylinder, the top of the first fixed seat is hinged with a first oil cylinder, a piston rod of the first air cylinder is hinged with a first clamping seat, the first clamping seat is provided with a U-shaped clamping groove, and a piston rod of the first oil cylinder is fixedly connected to the side part of the first clamping seat;
the side mold opening and closing structure comprises a second fixing seat, a second air cylinder is hinged to the bottom of the second fixing seat, a second oil cylinder is hinged to the top of the second fixing seat, a piston rod of the second air cylinder is hinged to a second clamping seat, a U-shaped clamping groove is formed in the second clamping seat, and a piston rod of the second oil cylinder is fixedly connected to the side portion of the second clamping seat.
2. The automatic opening and closing device for the end side die of the flow line segment die as claimed in claim 1, wherein the bottom ends of the end die supporting legs are hinged to a chassis, the connecting rod structure comprises a connecting plate component and a driving plate component, one end of the connecting plate component is hinged to the middle of the end die supporting legs, the other end of the connecting plate component is hinged to the driving plate component, the middle of the driving plate component is hinged to a supporting seat, and the supporting seat is fixed to the chassis;
the connecting plate assembly comprises a left connecting plate and a right connecting plate which are connected together, one ends of the two connecting plates are hinged to the middle part of the end die supporting leg, and the other ends of the two connecting plates are hinged to the top of the driving assembly; the driving assembly comprises two driving plates, the two driving plates are connected together, the middle parts of the driving plates are bent, the middle bending parts of the two driving plates are hinged to the supporting seat, the driving shafts are arranged at the bottoms of the two driving plates, and the end die opening and closing structure is located below the driving shafts.
3. The automatic opening and closing device for the end side die of the assembly line segment die as claimed in claim 2, wherein when the piston rod of the first cylinder extends out to drive the first clamping seat to move upwards, the U-shaped clamping groove of the first clamping seat can be clamped on the driving shaft, and the piston rod of the first cylinder drives the driving shaft to move through the first clamping seat, so as to drive the driving assembly to rotate around the supporting seat, and drive the supporting leg of the end die to rotate through the connecting plate assembly.
4. The automatic opening and closing device for the end side die of the assembly line segment die as claimed in claim 1, wherein the rotary support structure comprises a support, the upper portion of the support is fixedly connected with the lower portion of the support leg of the side die, a hinge seat is hinged to the support and fixed to the bottom die, a rotating shaft is arranged at the bottom of the support, and the side die opening and closing structure is located below the rotating shaft.
5. The automatic opening and closing device for the end side die of the assembly line segment die as claimed in claim 4, wherein when the piston rod of the second cylinder extends out to drive the second clamping seat to move upwards, the U-shaped clamping groove of the second clamping seat can be clamped on the rotating shaft, and the piston rod of the second cylinder drives the rotating shaft to move through the second clamping seat, so as to drive the rotary support structure and the side die supporting leg to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036989.3A CN112140291A (en) | 2020-09-28 | 2020-09-28 | Automatic opening and closing device for end side mold of production line duct piece mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011036989.3A CN112140291A (en) | 2020-09-28 | 2020-09-28 | Automatic opening and closing device for end side mold of production line duct piece mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112140291A true CN112140291A (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011036989.3A Pending CN112140291A (en) | 2020-09-28 | 2020-09-28 | Automatic opening and closing device for end side mold of production line duct piece mold |
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| Country | Link |
|---|---|
| CN (1) | CN112140291A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113714760A (en) * | 2021-09-06 | 2021-11-30 | 沈阳建筑大学 | Automatic mold assembling and disassembling equipment for shield segment mold |
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| CN203391093U (en) * | 2013-08-19 | 2014-01-15 | 中铁隧道装备制造有限公司 | Automatic opening-closing type segment mould |
| CN207771403U (en) * | 2017-12-30 | 2018-08-28 | 浩中机械(蚌埠)有限公司 | Hydraulic elevation type collects basket |
| CN109227899A (en) * | 2018-11-21 | 2019-01-18 | 扬州牧羊隧道设备有限公司 | A kind of novel tunnel lining segment mold |
| CN209851452U (en) * | 2019-03-19 | 2019-12-27 | 上海绿帕实业有限公司 | PU case production mould |
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2020
- 2020-09-28 CN CN202011036989.3A patent/CN112140291A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007098717A (en) * | 2005-10-03 | 2007-04-19 | Kaieitechno Co Ltd | Form for manufacturing water channel block and method for manufacturing water channel block |
| CN101134339A (en) * | 2006-08-29 | 2008-03-05 | 上海重型机械工程成套公司 | Arch bottom mold |
| CN201760963U (en) * | 2010-08-16 | 2011-03-16 | 秦皇岛天业通联重工股份有限公司 | End mold booster open-close type concrete pipe piece mold |
| CN203391093U (en) * | 2013-08-19 | 2014-01-15 | 中铁隧道装备制造有限公司 | Automatic opening-closing type segment mould |
| CN207771403U (en) * | 2017-12-30 | 2018-08-28 | 浩中机械(蚌埠)有限公司 | Hydraulic elevation type collects basket |
| CN109227899A (en) * | 2018-11-21 | 2019-01-18 | 扬州牧羊隧道设备有限公司 | A kind of novel tunnel lining segment mold |
| CN209851452U (en) * | 2019-03-19 | 2019-12-27 | 上海绿帕实业有限公司 | PU case production mould |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113714760A (en) * | 2021-09-06 | 2021-11-30 | 沈阳建筑大学 | Automatic mold assembling and disassembling equipment for shield segment mold |
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Application publication date: 20201229 |
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