A new type of mobile trolley for treating tunnel lining

Abstract

The present invention relates to the field of tunnel concrete lining construction, and specifically discloses a new type of mobile trolley for treating tunnel linings, which includes a vehicle body, a hydraulic system located on the vehicle body, a main support system installed on the vehicle body, a vehicle-mounted support system, and an adjustable hydraulic system, a driving automatic alignment system for aligning the directions of the main support system and the vehicle-mounted support system; the driving automatic alignment system includes a telescopic slewing device, the hydraulic system controls the axial rotation of the slewing device, the upper end of the slewing device is fixedly connected to the center of gravity of the bottom surface of the vehicle body, and the lower end of the slewing device can abut against the ground. In this solution, the vehicle body will not be separated from the main support system and the vehicle-mounted support system, which is convenient for quickly transferring to the next repair location for repair construction after the repair is completed, improving the efficiency of the repair process.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel concrete lining construction, and in particular to a new type of tunnel lining treatment mobile trolley. Background Art

[0002] As an important project in the field of infrastructure construction, the construction quality of tunnel projects directly affects the life safety of front-line construction personnel and the service life of the structure itself. Among them, the lining construction steps are of utmost importance. At present, most tunnel secondary lining concretes have defects such as honeycombing, pitted surface, exposed reinforcement, stepped joints, water leakage, cracks, exposed waterstops, non-compaction, voids, insufficient thickness, and insufficient strength after construction. Among them, the more serious defects are 3 types, namely insufficient strength, insufficient thickness, and voids behind the lining. To ensure structural safety and meet the use function, for the more serious defective areas, windowing and rework treatment are required. The treatment process of the rework treatment is basically as follows. During the treatment, non-destructive testing scans, secondary manual tapping tests are carried out in sequence to determine the windowing range, manual cutting of seams is carried out by scribing, mechanical breaking is carried out in sections, manual trimming, rebar planting, scaffold erection, formwork closing, pumping of concrete, formwork removal, curing, and grinding to make it smooth and round. The main turnover materials used in the construction include steel pipe scaffolds, top supports, bamboo plywood, etc. In this construction method, the erection and removal of the support system scaffold and the cutting and installation of bamboo plywood require a large amount of labor, the construction safety risk is relatively high, the construction period is relatively long, the cost is relatively high, and it is a traditional and old construction method.

[0003] Considering the defect height, defect location, and construction safety, generally, a trolley is now used in cooperation with a traveling gantry. After the trolley transports the traveling gantry to a local part of the tunnel, the traveling gantry is extended, and the upper end of the traveling gantry abuts against the inner wall of the tunnel, thereby fixing the position of the traveling gantry. When in use, the traveling gantry will be separated from the trolley to form a passage for people and vehicles to pass through between the traveling gantries. This structure is mainly applicable to tunnels with large structures. For the local parts of the tunnel with more serious defects, the traveling gantry has difficulties in disassembly, movement, and lack of flexibility, which will lead to greater difficulty and higher cost in local repair of tunnel defects. Summary of the Invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides a new type of tunnel lining treatment mobile trolley to solve the problems that the traveling gantry has difficulties in disassembly, movement, and lack of flexibility during use, which will lead to greater difficulty and higher cost in local repair of tunnel defects.

[0005] To achieve the above object, the basic scheme of the present invention is as follows: A new type of tunnel lining treatment mobile trolley includes a vehicle body and a hydraulic system located on the vehicle body, and further includes a main support system, a vehicle-mounted support system, an adjustable hydraulic system, and a driving automatic alignment system for aligning the directions of the main support system and the vehicle-mounted support system installed on the vehicle body;

[0006] The driving automatic alignment system includes a telescopic slewing device. The hydraulic system controls the axial rotation of the slewing device. The upper end of the slewing device is fixedly connected to the center of gravity of the bottom surface of the vehicle body, and the lower end of the slewing device can abut against the ground.

[0007] The main support system includes a steel arch and several aluminum molds. The steel arch is vertically arranged, and the upper end of the steel arch is detachably or fixedly connected to the aluminum mold.

[0008] The vehicle-mounted support system includes several horizontally telescopic cross beams. The cross beams are installed on the vehicle body, and the lower end of the steel arch is installed on the cross beams.

[0009] The technical principle of the present invention is as follows: When repairing the defective part of the tunnel, first drive the entire tunnel lining treatment mobile trolley to the local part of the tunnel defect through the vehicle body. During the movement of the vehicle body, the traveling direction of the vehicle body is parallel to the excavation direction of the tunnel; when the vehicle body reaches the local part of the tunnel defect, stop the movement of the vehicle body; then the slewing device drives the vehicle body, the main support system, the vehicle-mounted support system, and the hydraulic system to slowly rotate forward around the center of gravity axis of the vehicle body, so that the traveling direction of the vehicle body is perpendicular to the excavation direction of the tunnel.

[0010] Then, install the steel arch on the upper end of the jack, install and position the steel arch and the jack. The hydraulic system continues to control the slewing device to extend, so that the aluminum mold fits against the lining of the outer wall of the tunnel. After reaching the required height, the hydraulic system locks the height of the slewing device to realize the support of the tunnel lining treatment mobile trolley; then the construction workers can carry out the repair construction.

[0011] After the repair is completed, shorten the slewing device through the hydraulic system, so that the vehicle body, the main support system, the vehicle-mounted support system, and the hydraulic system move downwards, so that the aluminum mold no longer fits against the lining; then the slewing device drives the vehicle body, the main support system, the vehicle-mounted support system, and the hydraulic system to slowly rotate reversely around the center of gravity axis of the vehicle body again, so that the traveling direction of the vehicle body is parallel to the excavation direction of the tunnel again. The hydraulic system controls the slewing device to continue to shorten, so that the vehicle body contacts the ground. After the vehicle body starts, it can drive the entire tunnel lining treatment mobile trolley to move to the next position that needs to be repaired for repair construction.

[0012] Through the cooperation of the slewing device and the hydraulic system, the timing and support height of the lifting of the vehicle body, the main support system, the vehicle-mounted support system and the hydraulic system are controlled, which is also convenient for stably supporting the above structures. The slewing device can also control the directions of the vehicle body, the main support system, the vehicle-mounted support system and the hydraulic system, reducing the spatial limitation in the horizontal direction required when the entire tunnel lining treatment mobile trolley is moving forward; during the whole process, the vehicle body will not be separated from the main support system and the vehicle-mounted support system, which is convenient for quickly transferring to the next repair location for repair construction after the repair is completed, improving the efficiency of the repair treatment.

[0013] Furthermore, the driving automatic alignment system further includes a number of hydraulic lifting legs controlled by the hydraulic system. The hydraulic lifting legs are vertically arranged. The upper ends of the hydraulic lifting legs are fixedly connected to the bottom surface of the vehicle body, and the lower ends of the hydraulic lifting legs can abut against the ground.

[0014] When jacking up the lifting of the vehicle body, the main support system, the vehicle-mounted support system and the hydraulic system, the hydraulic lifting legs cooperate with the slewing device under the control of the hydraulic system to provide more stable support for the lifting of the vehicle body, the main support system, the vehicle-mounted support system and the hydraulic system, improving the safety during construction.

[0015] Furthermore, the diameter of the slewing device is larger than the diameter of the hydraulic lifting legs, and a support disk abutting against the ground is fixedly arranged at the lower end of the slewing device. The diameter of the support disk is twice or more the diameter of the slewing device.

[0016] Through the above settings, the support disk can expand the contact surface between the slewing device and the ground, and the large-diameter slewing device can make the support more stable.

[0017] Furthermore, the number of cross beams includes a number of horizontally telescopic first support beams and a number of horizontally telescopic second support beams. A number of columns are vertically installed between the first support beam and the second support beam. The upper ends of the columns are fixedly connected to the first support beam, and the lower ends of the columns are fixedly connected to the second support beam.

[0018] Through the above settings, the columns can improve the stability of the support between the first support beam and the second support beam, and can also increase the height of the steel arch, reducing the weight of the frame structure between the steel arch and the vehicle body.

[0019] Furthermore, the first support beam is a first hydraulic telescopic beam controlled by the hydraulic system. First connecting beams are coaxially slidably arranged at both ends of the first hydraulic telescopic beam. The second support beam is a second hydraulic telescopic beam controlled by the hydraulic system. Second connecting beams are coaxially slidably arranged at both ends of the second hydraulic telescopic beam.

[0020] The first connecting beam on the first hydraulic telescopic beam and the second connecting beam on the second hydraulic telescopic beam are extended through the hydraulic system. The first connecting beam and the second connecting beam form an additional construction platform, facilitating the repair construction operations of construction workers on the first connecting beam and the second connecting beam.

[0021] Furthermore, the steel arch support includes a number of jacks and an operation platform horizontally installed between the jacks. Each jack includes a fixed part and a sliding part. The sliding part is located above the fixed part. The operation platform is detachably connected and fixedly connected to the fixed part of the jack.

[0022] With the above settings, installing the operation platform on the jacks facilitates the construction of construction workers. At the same time, the jacks have a strong and stable supporting ability for the aluminum formwork, making the support of the aluminum formwork stable and facilitating the repair construction operations.

[0023] Furthermore, the main support system also includes a number of steel support modules connected between adjacent jacks. Each steel support module includes a number of installation columns, a first connecting column, and a second connecting column. The installation columns are all vertically arranged, the first connecting columns are all horizontally arranged, and the second connecting columns are all inclined. The first connecting column is detachably connected to the number of installation columns, and the second connecting column is detachably installed between adjacent installation columns. The contour with a triangular cross-section is formed between the side walls of adjacent second connecting columns and the installation columns.

[0024] With the above settings, the steel support modules can be quickly disassembled and assembled through the installation columns, the first connecting column, and the second connecting column. The steel support modules and the jacks can also be quickly disassembled and assembled, making the disassembly and assembly of the steel support modules and the jacks convenient and facilitating the improvement of the installation efficiency during construction.

[0025] Furthermore, it also includes a number of adjusting screw rods and steel pipes supported between the lower surface of the first support beam and the ground. The lower end of the adjusting screw rod is rotatably connected to the upper end of the steel pipe.

[0026] After completing the height adjustment of the hydraulic lifting legs and the slewing device, adjust the adjusting screw rods on the steel pipes. The adjusting screw rods and the steel pipes extend to stably support the first hydraulic telescopic beam and improve the stability of the first hydraulic telescopic beam.

[0027] Furthermore, the jacks are installed on the first support beam in a staggered manner, and the lower end of the jack is hinged to the first support beam, and the side wall of the jack can be attached to the first support beam.

[0028] With the above settings, after the steel support modules are disassembled and folded, the jacks can be attached to the first hydraulic telescopic beam, reducing the volume of the tunnel lining treatment mobile trolley, facilitating the vehicle body to travel in the tunnel, and reducing its requirement for the required space.

[0029] Furthermore, an anchor connection is provided at the side walls of two adjacent aluminum molds.

[0030] With the above arrangement, the connection between the aluminum molds is made more stable, facilitating repair construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic structural diagram during the steering construction of a new-type tunnel lining treatment mobile trolley in an embodiment of the present invention.

[0032] Figure 2 For Figure 1 a schematic structural diagram of the left view direction of the steel support module.

[0033] In the above-mentioned drawings: tunnel 1, lining 10, vehicle body 20, hydraulic system 30, slewing device 401, hydraulic lifting support leg 402, jack 501, operation platform 502, steel support module 60, mounting column 601, first connecting column 602, second connecting column 604, first hydraulic telescopic beam 701, first connecting beam 702, second support beam 801, second hydraulic telescopic beam 802, column 803, adjusting screw rod 901, steel pipe 902. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The technical solutions in the present invention will be further described below with reference to the drawings and embodiments.

[0035] This embodiment is basically as Figure 1 and Figure 2 shown. An embodiment of the present invention provides a new-type tunnel lining treatment mobile trolley, including a vehicle body 20, a hydraulic system 30 located on the vehicle body 20, a main support system, a vehicle-mounted support system, and a drive automatic alignment system for adjusting the directions of the hydraulic system 30, the main support system, and the vehicle-mounted support system; the vehicle body 20 is 5.3 m long, 2.5 m wide, and 2 m deep; as Figure 1 shown, the drive automatic alignment system includes a telescopic slewing device 401, the slewing device 401 is a hydraulic slewing device 401, the hydraulic system 30 controls the axial rotation of the slewing device 401, the upper end of the slewing device 401 is fixedly connected to the center of gravity of the bottom surface of the vehicle body 20, and the lower end of the slewing device 401 can abut against the ground.

[0036] As Figure 1 shown, the main support system includes a plurality of jacks 501, an operation platform 502 horizontally installed between the plurality of jacks 501, a plurality of aluminum molds, and a plurality of steel support modules 60 connected between two adjacent jacks 501. The jack 501 is 2 m long and is of two-stage telescopic type; an anchor connection is provided at the side walls of two adjacent aluminum molds. The vertically arranged jacks 501 and the operation platform 502 form a steel arch frame, and the upper end of the steel arch frame is detachably and fixedly connected to the aluminum mold by bolts; as Figure 1As shown, the jack 501 includes a fixed part and a sliding part. The sliding part is located above the fixed part. The operating platform 502 is fixedly connected to the fixed part of the jack 501 through bolts. At the same time, as Figure 2 shown, the steel support module 60 includes a number of mounting columns 601, first connecting columns 602 and second connecting columns 604. The mounting columns 601 are all vertically arranged, the first connecting columns 602 are all horizontally arranged, and the second connecting columns 604 are all inclined. The first connecting columns 602 are detachably connected to a number of mounting columns 601, and the second connecting columns 604 are detachably installed between two adjacent mounting columns 601. The longitudinal section formed between two adjacent second connecting columns 604 and the side wall of the mounting column 601 is triangular.

[0037] At the same time, as Figure 1 shown, the drive automatic alignment system also includes a number of hydraulic lifting legs 402 controlled by the hydraulic system 30. The hydraulic lifting legs 402 are vertically arranged. The upper end of the hydraulic lifting leg 402 is welded to the bottom surface of the vehicle body 20, and the lower end of the hydraulic lifting leg 402 can abut against the ground. At the same time, the diameter of the slewing device 401 is larger than that of the hydraulic lifting leg 402, and a support disk abutting against the ground is fixedly arranged at the lower end of the slewing device 401, and the diameter of the support disk is twice or more that of the slewing device 401.

[0038] As Figure 1 shown, the vehicle-mounted support system includes a number of horizontally telescopic cross beams. The number of cross beams includes a number of horizontally telescopic first support beams and a number of horizontally telescopic second support beams 801. The first support beam is a first hydraulic telescopic beam 701 controlled by the hydraulic system 30. First connecting beams 702 are coaxially slidably arranged at both ends of the first hydraulic telescopic beam 701. The second support beam 801 is a second hydraulic telescopic beam 802 controlled by the hydraulic system 30. Second connecting beams are coaxially slidably arranged at both ends of the second hydraulic telescopic beam 802. A number of columns 803 are vertically installed between the first support beam and the second support beam 801. The length of the column 803 is 7.5 m. The upper end of the column 803 is fixedly connected to the first hydraulic telescopic beam 701 through bolts, and the lower end of the column 803 is fixedly connected to the second hydraulic telescopic beam 802 through bolts. At the same time, the lower end of the jack 501 is hinged to the upper side of the first hydraulic telescopic beam 701, and the side wall of the jack 501 can be attached to the first hydraulic telescopic beam 701.

[0039] In addition, there are a number of adjusting screw rods 901 and steel pipes 902 supported between the lower surface of the first support beam and the ground. The lower end of the adjusting screw rod 901 is rotatably connected to the upper end of the steel pipe 902.

[0040] When a new type of tunnel lining treatment mobile trolley in this embodiment is in use, first, the vehicle body 20 drives the entire tunnel lining treatment mobile trolley to move to a local part of the defect of the tunnel 1. During the movement of the vehicle body 20, the axes of the first hydraulic telescopic beam 701 and the second hydraulic telescopic beam 802 are parallel to the excavation direction of the tunnel 1. When the vehicle body 20 reaches the local part of the defect of the tunnel 1, the movement of the vehicle body 20 is stopped. Then, the hydraulic system 30 controls the rotary device 401 to extend, and the support disc abuts against the ground, so that the rotary device 401 jacks up the vehicle body 20. After the vehicle body 20 leaves the ground by 3 cm, the rotary device 401 starts to drive the vehicle body 20, the main support system, the vehicle-mounted support system, and the hydraulic system 30 to slowly rotate forward around the axis of the center of gravity of the vehicle body 20, so that the traveling direction of the vehicle body 20 is perpendicular to the excavation direction of the tunnel 1, and the axes of the first hydraulic telescopic beam 701 and the second hydraulic telescopic beam 802 are perpendicular to the excavation direction of the tunnel 1. During this process, through the cooperation of the hydraulic system 30 and the rotary device 401, the directions of the vehicle body 20, the main support system, the vehicle-mounted support system, and the hydraulic system 30 can be controlled, which is convenient for the vehicle body 20 to drive the main support system, the vehicle-mounted support system, and the hydraulic system 30 to travel along the tunnel 1, and is also convenient for changing the direction for subsequent support operations.

[0041] Then, the jack 501 on the first hydraulic telescopic beam 701 is flipped to the vertical state, and a number of steel support modules 60 are also connected between the jacks 501 through structures such as bolts, so that the connection between adjacent two jacks 501 is tightened, and then an operation platform 502 is installed between the jacks 501; the adjusting screw rod 901 and the steel pipe 902 are vertically supported between the lower surface of the first hydraulic telescopic beam 701 and the ground; the construction workers are located on the operation platform 502, and the aluminum formwork is installed at the upper end of the jack 501, and the aluminum formwork and the jack 501 are installed and positioned.

[0042] After the aluminum formwork is initially fixed, the hydraulic system 30 controls the hydraulic lifting legs 402 and the rotary device 401 to extend. The hydraulic lifting legs 402 and the rotary device 401 both abut against the ground, and the aluminum formwork is made to fit against the lining 10 on the outer wall of the tunnel 1. After reaching the required height, the hydraulic system 30 locks the heights of the hydraulic lifting legs 402 and the rotary device 401; the adjusting screw rod 901 on the steel pipe 902 is adjusted, and the adjusting screw rod 901 and the steel pipe 902 extend to stably support the first hydraulic telescopic beam 701.

[0043] Then, the hydraulic system 30 controls the first connecting beam 702 on the first hydraulic telescopic beam 701 and the second connecting beam on the second hydraulic telescopic beam 802 to extend. The first connecting beam 702 and the second connecting beam form an additional construction platform, which is convenient for construction workers to perform repair construction operations on the first connecting beam 702 and the second connecting beam.

[0044] After the repair is completed, disassemble the operation platform 502 and the steel support module 60 between the jacks 501, and then rotate the jacks 501 around the connection with the first hydraulic telescopic beam 701. The jacks 501 are attached to the first hydraulic telescopic beam 701, which can reduce the occupied volume of the entire tunnel lining treatment mobile trolley. Then, shorten the adjusting screw rod 901 and the steel pipe 902, and shorten the hydraulic lifting legs 402 through the hydraulic system 30. The slewing device 401 drives the vehicle body 20, the main support system, the vehicle-mounted support system, and the hydraulic system 30 to slowly rotate in the reverse direction around the center of gravity axis of the vehicle body 20, so that the traveling direction of the vehicle body 20 is parallel to the excavation direction of the tunnel 1 again. The hydraulic system 30 controls the slewing device 401 to shorten, so that the vehicle body 20 contacts the ground. After the vehicle body 20 starts, it can drive the entire tunnel lining treatment mobile trolley to move to the next position to be repaired for repair construction.

[0045] In the above process, the cooperation between the jacks 501, the first hydraulic telescopic beam 701, the operation platform 502, and the steel support module 60 is adopted, which makes the installation between the jacks 501, the operation platform 502, and the steel support module 60 convenient and fast, and thus the aluminum formwork can be supported quickly. At the same time, after disassembly and folding, the jacks 501 can be attached to the first hydraulic telescopic beam 701, reducing the volume of the tunnel lining treatment mobile trolley, facilitating the vehicle body 20 to travel in the tunnel 1, and reducing its requirement for the required space. At the same time, the slewing device 401 and the hydraulic lifting legs 402 can cooperate with the hydraulic system 30 to control the timing and support height of the lifting of the vehicle body 20, the main support system, the vehicle-mounted support system, and the hydraulic system 30, and also facilitate the stable support of the above structures. The slewing device 401 can also control the direction of the vehicle body 20, the main support system, the vehicle-mounted support system, and the hydraulic system 30, further reducing the space limitation in the horizontal direction required for the entire tunnel lining treatment mobile trolley during traveling.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A new type of mobile trolley for treating tunnel lining, comprising a vehicle body and a hydraulic system located on the vehicle body, characterized in that, It also includes a main support system, a vehicle-mounted support system, an adjustable rotary hydraulic system, and a driving automatic alignment system for the main support system and the vehicle-mounted support system, which are installed on the vehicle body; The driving automatic alignment system includes a telescopic slewing device. The hydraulic system controls the axial rotation of the slewing device. The upper end of the slewing device is fixedly connected to the center of gravity of the bottom surface of the vehicle body, and the lower end of the slewing device can abut against the ground; The main support system includes a steel arch and several aluminum molds. The steel arch is arranged vertically, and the upper end of the steel arch is detachably or fixedly connected to the aluminum mold; The vehicle-mounted support system includes several horizontally telescopic cross beams, which are installed on the vehicle body, and the lower end of the steel arch is installed on the cross beam; Several of the cross beams include several horizontally telescopic first support beams and several horizontally telescopic second support beams. Several columns are vertically installed between the first support beam and the second support beam. The upper end of the column is fixedly connected to the first support beam, and the lower end of the column is fixedly connected to the second support beam; The first support beam is a first hydraulic telescopic beam controlled by the hydraulic system. First connecting beams are coaxially slidably arranged at both ends of the first hydraulic telescopic beam. The second support beam is a second hydraulic telescopic beam controlled by the hydraulic system. Second connecting beams are coaxially slidably arranged at both ends of the second hydraulic telescopic beam.

2. The novel tunnel lining treatment mobile trolley according to claim 1, characterized in that, The driving automatic alignment system also includes several hydraulic lifting legs controlled by the hydraulic system. The hydraulic lifting legs are arranged vertically. The upper end of the hydraulic lifting leg is fixedly connected to the bottom surface of the vehicle body, and the lower end of the hydraulic lifting leg can abut against the ground.

3. The novel tunnel lining treatment mobile trolley according to claim 2, characterized in that, The diameter of the slewing device is larger than the diameter of the hydraulic lifting leg, and a support disk abutting against the ground is fixedly arranged at the lower end of the slewing device. The diameter of the support disk is twice or more the diameter of the slewing device.

4. A novel tunnel lining treatment mobile trolley as claimed in claim 3, characterized in that, The steel arch includes several jacks and an operation platform horizontally installed between the several jacks. The jack includes a fixed part and a sliding part. The sliding part is located above the fixed part. The operation platform is detachably and fixedly connected to the fixed part of the jack.

5. The novel tunnel lining treatment mobile trolley according to claim 4, wherein The main support system also includes several steel support modules connected between adjacent two jacks. The steel support module includes several installation columns, first connecting columns and second connecting columns. The installation columns are all arranged vertically, the first connecting columns are all arranged horizontally, and the second connecting columns are all arranged obliquely. The first connecting columns are detachably connected to the several installation columns, and the second connecting columns are detachably installed between adjacent two installation columns. The contour with a triangular cross section is formed between the adjacent two second connecting columns and the side wall of the installation column.

6. A novel tunnel lining treatment mobile trolley as described in claim 5, characterized in that, It also includes several adjusting lead screws and steel pipes supported between the lower surface of the first support beam and the ground. The lower end of the adjusting lead screw is rotatably connected to the upper end of the steel pipe.

7. A novel tunnel lining treatment mobile trolley as claimed in claim 6, characterized in that, The jacks are staggeredly installed on the first support beam, and the lower end of the jack is hinged to the first support beam, and the side wall of the jack can be attached to the first support beam.

8. A novel tunnel lining treatment mobile trolley as claimed in claim 7, characterized in that, Anchoring is provided at the side walls of adjacent two aluminum molds.

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