CN113561441B - Multi-station extrusion plastic bar production line - Google Patents
Multi-station extrusion plastic bar production line Download PDFInfo
- Publication number
- CN113561441B CN113561441B CN202110844595.9A CN202110844595A CN113561441B CN 113561441 B CN113561441 B CN 113561441B CN 202110844595 A CN202110844595 A CN 202110844595A CN 113561441 B CN113561441 B CN 113561441B
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- clamping plate
- plastic bar
- plate
- shaping
- supporting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
Abstract
The invention provides a multi-station extrusion plastic bar production line, which belongs to the technical field of plastic bar production and processing and comprises a processing table, a first driving part, a dissociation component, a supporting part, a reset component, a shaping component and an engagement part, wherein the supporting part is slidably arranged on one side of the processing table, the shaping component is arranged on one side of the supporting part far away from the processing table and is used for shaping and straightening plastic bars, the first driving part and the dissociation component are both arranged on one side of the processing table, the engagement part is arranged on one side of the supporting part, the first driving part is connected with the engagement part and is used for driving the supporting part to reversely move along the moving direction of the plastic bars, and after the supporting part moves to a preset position, the dissociation component can drive the engagement part to be separated from the first driving part. Compared with the prior art, the embodiment of the invention can realize the shaping and straightening of the plastic bar, and has the advantage of good straightening effect.
Description
Technical Field
The invention belongs to the technical field of plastic bar production and processing, and particularly relates to a multi-station extrusion plastic bar production line.
Background
At present, in the production and processing process of plastic bars, plastic raw materials are required to be shaped after being melted and extruded so as to ensure the flatness of the plastic bars.
In the prior art, most of shaping treatment of plastic bars utilizes extrusion pressure to drive the plastic bars to pass through a shaping mechanism and move, and shaping straightening treatment of the plastic bars is realized by utilizing the shaping mechanism.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problem to be solved by the embodiment of the invention is to provide a multi-station extrusion plastic bar production line.
In order to solve the technical problems, the invention provides the following technical scheme:
a multi-station extrusion plastic bar production line comprises a processing table, a first driving part, a dissociation assembly, a supporting part, a resetting assembly, a shaping assembly and an engagement part,
the supporting part is slidably arranged at one side of the processing table, the shaping component is arranged at one side of the supporting part far away from the processing table and is used for shaping and straightening the plastic bar,
the first driving part and the dissociation subassembly all set up processing bench one side, the interlock portion sets up supporting part one side, first driving part with the interlock portion links to each other, is used for driving the supporting part is followed plastics rod direction of movement and is reversed and remove after the supporting part removes to the preset position, the dissociation subassembly can drive the interlock portion with first driving part separation, reset subassembly can drive the supporting part is reversed and is removed.
As a further improvement of the invention: the supporting part comprises a supporting plate which is connected with the processing table in a sliding way through a sliding component,
the first driving part comprises a motor and a screw rod connected with the output end of the motor, the motor is fixedly arranged at one side of the processing table,
the occluding part comprises an occluding plate and a frame, the screw rod penetrates through the supporting plate, the occluding plate is embedded on one side of the supporting plate, threads matched with the screw rod are arranged on one side of the occluding plate, the frame is fixedly arranged on one side of the occluding plate,
the dissociation subassembly includes the body of rod, body of rod one end is provided with the inclined plane.
As a further improvement of the invention: the sliding component guide rail and the sliding block are arranged on the same surface,
the guide rail is fixedly arranged on one side of the processing table, the sliding block is fixedly arranged on one side of the supporting plate, and the sliding block is in sliding fit with the guide rail.
As a further improvement of the invention: two groups of supports are fixedly arranged on one side of the processing table, the screw rod penetrates through the two groups of supports and is in running fit with the two groups of supports, the rod body is fixedly arranged on one side of one group of supports, one end of the reset component is connected with one group of supports, and the other end of the reset component is connected with the supporting plate.
As a still further improvement of the invention: the support plate is characterized in that a support is further fixedly arranged on one side of the support plate, a sliding rod is fixedly arranged on the side wall of the frame, a sliding groove is formed in one side of the support, the sliding rod extends to the inside of the sliding groove and is in sliding fit with the sliding groove, and the frame is connected with the support through an elastic piece.
As a still further improvement of the invention: the shaping component comprises a first clamping plate and a second clamping plate which are oppositely arranged,
a plurality of shaping gaps corresponding to one another are formed in one side, opposite to the first clamping plate and the second clamping plate, of each of the two corresponding shaping gaps, and a channel through which the plastic bar can pass is formed by closing the shaping gaps.
As a still further improvement of the invention: the second clamping plate is connected with the supporting plate through a second driving part, the second clamping plate is connected with the first clamping plate through a transmission part, the second driving part is used for driving the second clamping plate to move towards the first clamping plate, and the second clamping plate can be driven to move towards the first clamping plate through the transmission part when moving.
As a still further improvement of the invention: end plates are fixedly arranged at the end parts of the first clamping plate and the second clamping plate, a column casing is fixedly arranged at one side of the end plates,
the transmission part comprises a transmission shaft rod, two groups of thread sections with opposite rotation directions are arranged on the transmission shaft rod, one end of the transmission shaft rod is rotationally connected with the supporting plate, the transmission shaft pipe vertically penetrates through the two groups of column casings, and the two groups of column casings are respectively in threaded fit with the two groups of thread sections.
Compared with the prior art, the invention has the beneficial effects that:
in the embodiment of the invention, the plastic bar extruded by the die head can pass through the shaping assembly and move relative to the shaping assembly, the shaping assembly can carry out shaping and straightening treatment on the plastic bar, and the interaction between the first driving part and the meshing part can drive the meshing part and the supporting part to synchronously move along one side of the processing table so as to drive the shaping assembly to synchronously move, and the shaping assembly can reversely move along the moving direction of the plastic bar when moving, so that the shaping and straightening effect of the shaping assembly on the plastic bar can be improved; after the shaping assembly moves to a certain position, the dissociation assembly drives the engaging part to be separated from the first driving part, so that the connection effect between the first driving part and the engaging part is relieved, the resetting assembly can drive the shaping assembly to reversely move so as to reset the shaping assembly, and compared with the prior art, the shaping and straightening of plastic bars can be realized, and the plastic bar straightening device has the advantages of good straightening effect and high straightening efficiency.
Drawings
FIG. 1 is a schematic diagram of a multi-station extrusion plastic bar production line;
FIG. 2 is a schematic view of a modular construction of a multi-station extrusion plastic bar production line;
FIG. 3 is an enlarged schematic view of area A of FIG. 1;
in the figure: 1-processing bench, 2-first drive, 21-lead screw, 22-dissociation subassembly, 23-support, 24 motor, 3-supporting part, 31-guide rail, 32-slider, 33-backup pad, 4-reset subassembly, 5-second drive, 6-drive, 7-design subassembly, 71-first splint, 72-end plate, 73-column, 74-design breach, 75-second splint, 8-interlock portion, 81-support, 82-elastic component, 83-spout, 84-frame, 85-interlock board.
Detailed Description
The technical scheme of the patent is further described in detail below with reference to the specific embodiments.
Embodiments of the present patent are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
Referring to fig. 1, the present embodiment provides a multi-station extrusion plastic bar production line, which includes a processing table 1, a first driving portion 2, a detachment assembly 22, a supporting portion 3, a reset assembly 4, a shaping assembly 7 and an engaging portion 8, wherein the supporting portion 3 is slidably mounted on one side of the processing table 1, the shaping assembly 7 is disposed on one side of the supporting portion 3 away from the processing table 1, and is used for shaping and straightening plastic bars, the first driving portion 2 and the detachment assembly 22 are both disposed on one side of the processing table 1, the engaging portion 8 is disposed on one side of the supporting portion 3, the first driving portion 2 is connected with the engaging portion 8, and is used for driving the supporting portion 3 to reversely move along the moving direction of the plastic bars, after the supporting portion 3 moves to a predetermined position, the detachment assembly 22 can drive the engaging portion 8 to be separated from the first driving portion 2, and the reset assembly 4 can drive the supporting portion 3 to reversely move.
The plastic bar extruded by the die head can pass through the shaping assembly 7 and move relative to the shaping assembly 7, the shaping assembly 7 can carry out shaping and straightening treatment on the plastic bar, the interaction between the first driving part 2 and the engaging part 8 can drive the engaging part 8 and the supporting part 3 to synchronously move along one side of the processing table 1, and then the shaping assembly 7 is driven to synchronously move, and the shaping assembly 7 can reversely move along the moving direction of the plastic bar when moving, so that the shaping and straightening effect of the shaping assembly 7 on the plastic bar can be improved; after the shaping assembly 7 moves to a certain position, the dissociation assembly 22 drives the engagement portion 8 to be separated from the first driving portion 2, so that the connection between the first driving portion 2 and the engagement portion 8 is released, and the reset assembly 4 can drive the shaping assembly 7 to move reversely, so that the resetting of the shaping assembly 7 is realized.
Referring to fig. 1, in one embodiment, the support portion 3 includes a support plate 33, the support plate 33 is slidably connected with the processing table 1 through a sliding component, the first driving portion 2 includes a motor 24 and a screw rod 21 connected to an output end of the motor 24, the motor 24 is fixedly disposed on one side of the processing table 1, the engaging portion 8 includes an engaging plate 85 and a frame 84, the screw rod 21 penetrates through the support plate 33, the engaging plate 85 is embedded on one side of the support plate 33, threads matched with the screw rod 21 are provided on one side of the engaging plate 85, the frame 84 is fixedly disposed on one side of the engaging plate 85, the dissociation component 22 includes a rod body, and one end of the rod body is provided with an inclined plane.
The screw rod 21 is driven to rotate by the motor 24, the supporting plate 33 is driven to slide along one side of the processing table 1 by the cooperation of the screw rod 21 and the meshing plate 85 when the screw rod 21 rotates, the shaping assembly 7 is driven to move, the shaping assembly 7 is utilized to carry out shaping and straightening treatment on plastic bars, when the supporting plate 33 moves to a certain position, one end of a rod body can be inserted into the frame 84, the frame 84 and the meshing plate 85 can be driven to move by the cooperation of the frame 84 and the inclined plane, the meshing plate 85 and the screw rod 21 are released from the cooperation, and at the moment, the reset assembly 4 can drive the supporting plate 33 to move reversely to drive the shaping assembly 7 to move reversely, so that the reset of the shaping assembly 7 is realized.
In another embodiment, the supporting portion 3 may further include a sliding seat, the sliding seat is connected with the processing table 1 through a sliding component, the first driving portion 2 may further include an air cylinder and a piston rod connected to an output end of the air cylinder, the air cylinder is fixedly disposed on one side of the processing table 1, the engaging portion 8 may further include a clamping block fixedly disposed on one side of the sliding seat, a clamping groove for the clamping block to be inserted is formed in the piston rod, and the dissociation component 22 includes a first magnet fixedly disposed on one end of the clamping block and a second magnet fixedly disposed on one side of the processing table 1.
The cylinder drives the piston rod to move, the matching of the clamping block and the clamping groove is adopted, the sliding seat is driven to move along one side of the processing table, the shaping assembly 7 is driven to move, the plastic bar is shaped and straightened by the movement of the shaping assembly 7, when the sliding seat moves to a certain position, the first magnet moves to one side of the second magnet, the clamping block is driven to be removed from the clamping groove by the attraction effect between the first magnet and the second magnet, and at the moment, the sliding seat can be driven to move reversely under the action of the reset assembly, so that the shaping assembly 7 is driven to move reversely, and the reset of the shaping assembly is realized.
Referring to fig. 1, in one embodiment, the sliding assembly rail 31 and the slider 32 are fixedly disposed on the side of the processing table 1, when the support portion 3 includes a support plate 33, the slider 32 is fixedly disposed on the side of the support plate 33, when the support portion 3 includes a sliding seat, the slider 32 is fixedly disposed on the side of the sliding seat, and the slider 32 is slidably engaged with the rail 31.
In another embodiment, the sliding assembly may further include a guiding polish rod fixedly disposed on one side of the processing table 1 and a sliding sleeve movably sleeved on the guiding polish rod, when the supporting portion 3 includes a supporting plate 33, the sliding sleeve is fixedly disposed on one side of the supporting plate 33, and when the supporting portion 3 includes a sliding seat, the sliding sleeve is fixedly disposed on one side of the sliding seat.
Referring to fig. 1, in one embodiment, two sets of supports 23 are fixedly disposed on one side of the processing table 1, the screw rod 21 penetrates through the two sets of supports 23 and is in running fit with the two sets of supports 23, the rod body is fixedly disposed on one side of one set of supports 23, one end of the reset assembly 4 is connected to one set of supports 23, and the other end is connected to the support plate 33.
In the above embodiment, the reset assembly 4 may be a spring, or may be a metal elastic sheet, which is not limited herein.
Referring to fig. 3, in one embodiment, a bracket 81 is further fixedly disposed on one side of the supporting plate 33, a sliding rod is fixedly disposed on a side wall of the frame 84, a sliding groove 83 is disposed on one side of the bracket 81, the sliding rod extends into the sliding groove 83 and is slidably engaged with the sliding groove 83, and the frame 84 is further connected with the bracket 81 through an elastic member 82.
When the rod body acts on the frame 84 to drive the frame 84 and the biting plate 85 to move, the sliding rod slides along the inside of the sliding groove 83, the elastic piece 82 is adaptively compressed, when the supporting plate 33 drives the biting plate 85 and the frame 84 to move reversely, the elastic piece 82 can drive the frame 84 and the biting plate 85 to move reversely, the supporting force of the elastic piece 82 is overcome through the damping action between the sliding rod and the sliding groove 83, so that the frame 84 and the biting plate 85 are prevented from moving reversely and excessively fast, the supporting plate 33 is ensured to move smoothly to the initial position, smooth reset of the supporting plate 33 is realized, after the supporting plate 33 moves to the initial position, the biting plate 85 can be meshed with the screw rod 21 again, and in the subsequent rotating process of the screw rod 21, the supporting plate 33 and the shaping assembly 7 are driven to move reversely along the plastic bar again, and the subsequent rod bodies of the plastic bar are shaped and straightened continuously.
In the above embodiment, the elastic member 82 may be a spring, or may be a metal elastic sheet, which is not limited herein.
Referring to fig. 2, in one embodiment, the shaping assembly 7 includes a first clamping plate 71 and a second clamping plate 75 that are disposed opposite to each other, and a plurality of shaping notches 74 are formed on opposite sides of the first clamping plate 71 and the second clamping plate 75, and the corresponding two groups of shaping notches 74 are closed to form a channel through which the plastic rod can pass.
Referring to fig. 2, in one embodiment, the second clamping plate 75 is connected to the supporting plate 33 through the second driving portion 5, the second clamping plate 75 is connected to the first clamping plate 71 through the transmission portion 6, the second driving portion 5 is configured to drive the second clamping plate 75 to move toward the first clamping plate 71, and the second clamping plate 75 can simultaneously drive the second clamping plate 71 to move toward the first clamping plate 75 through the transmission portion 6, so that the shaping gap 74 is closed through the relative movement between the second clamping plate 75 and the first clamping plate 71, so as to clamp and shape the plastic bar.
In one embodiment, the second driving portion 5 is an air cylinder or a linear motor, the end portions of the first clamping plate 71 and the second clamping plate 75 are fixedly provided with end plates 72, one side of each end plate 72 is fixedly provided with a cylinder 73, the transmission portion 6 comprises a transmission shaft rod, two sets of threaded sections with opposite rotation directions are arranged on the transmission shaft rod, one end of the transmission shaft rod is rotationally connected with the supporting plate 33, the transmission shaft rod vertically penetrates through the two sets of cylinders 73, the two sets of cylinders 73 are respectively in threaded fit with the two sets of threaded sections, when the second driving portion 5 drives the second clamping plate 75 to move, the second clamping plate 75 can drive the corresponding cylinders 73 to move, when the cylinders 73 move, the transmission shaft rod is driven to rotate through threaded fit with the transmission shaft rod, and when the transmission shaft rod rotates, the first clamping plate 71 is driven to move through threaded fit with the other sets of cylinders 73, and the two sets of threaded sections are mutually close to each other when the first clamping plate 71 and the second clamping plate 75 move, so as to clamp and fix the plastic bars.
In another embodiment, the transmission part 6 may further include a first rack fixedly disposed on one side of the second clamping plate 75 and a second rack fixedly disposed on one side of the first clamping plate 71, one side of the supporting plate 33 is further rotatably provided with a transmission gear, the first rack and the second rack are respectively engaged with each other and disposed on two sides of the transmission gear, when the second clamping plate 75 moves, the first rack can be driven to move, and the first clamping plate 71 can be driven to move towards the second clamping plate 75 by using the engagement action among the first rack, the transmission gear and the second rack, so that the first clamping plate 71 and the second clamping plate 75 move relatively close to each other to clamp and shape the plastic bar.
In the embodiment of the invention, the plastic bar extruded by the die head can pass through the shaping assembly 7 and move relative to the shaping assembly 7, the shaping assembly 7 can perform shaping and straightening treatment on the plastic bar, the interaction between the first driving part 2 and the engaging part 8 can drive the engaging part 8 and the supporting part 3 to synchronously move along one side of the processing table 1, and further drive the shaping assembly 7 to synchronously move, and the shaping assembly 7 can reversely move along the moving direction of the plastic bar when moving, so that the shaping and straightening effect of the shaping assembly 7 on the plastic bar can be improved; after the shaping assembly 7 moves to a certain position, the dissociation assembly 22 drives the engagement portion 8 to be separated from the first driving portion 2, so that the connection between the first driving portion 2 and the engagement portion 8 is released, the resetting assembly 4 can drive the shaping assembly 7 to reversely move, and the shaping assembly 7 can reset.
While the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes may be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (6)
1. The utility model provides a multistation extrusion plastic bar production line, its characterized in that includes processing platform, first drive division, dissociation subassembly, supporting part, reset subassembly, design subassembly and interlock portion, supporting part slidable mounting is in processing platform one side, design subassembly sets up the supporting part is kept away from one side of processing platform for carry out design alignment to the plastic bar, first drive division and dissociation subassembly all set up processing platform one side, interlock portion sets up supporting part one side, first drive division with interlock portion links to each other for drive the supporting part is along the reverse movement of plastic bar direction after the supporting part moves to the preset position, dissociation subassembly can drive interlock portion with first drive division, reset subassembly can drive the reverse movement of supporting part, the supporting part includes the backup pad, the backup pad with processing platform passes through sliding component sliding connection, first drive division includes the motor and connects the lead screw of motor output, motor interlock board one side is provided with processing platform plywood, interlock board and frame, the frame is provided with the interlock board is provided with, the interlock board is still set up to one side is provided with through the interlock board, the frame is provided with, the interlock board is provided with one side is connected to the slide bar body one side, the side is provided with the slide bar body is provided with the interlock board, the interlock board is provided with the slide bar side, the interlock board is provided with the interlock board is connected to the inside through the slide bar, when the supporting plate moves to a certain position, one end of the rod body is inserted into the frame, and the frame and the inclined plane are matched to drive the frame and the occluding plate to move, so that the matching effect of the occluding plate and the screw rod is relieved.
2. The multi-station extrusion plastic bar production line according to claim 1, wherein the sliding assembly comprises a guide rail and a sliding block, the guide rail is fixedly arranged on one side of the processing table, the sliding block is fixedly arranged on one side of the supporting plate, and the sliding block is in sliding fit with the guide rail.
3. The multi-station extrusion plastic bar production line according to claim 1, wherein two groups of supports are fixedly arranged on one side of the processing table, the screw rod penetrates through the two groups of supports and is in running fit with the two groups of supports, the rod body is fixedly arranged on one side of one group of supports, one end of the reset assembly is connected with one group of supports, and the other end of the reset assembly is connected with the supporting plate.
4. A multi-station extrusion plastic bar production line according to any one of claims 1-3, wherein the shaping assembly comprises a first clamping plate and a second clamping plate which are oppositely arranged, a plurality of shaping gaps which are in one-to-one correspondence are formed on one side of the first clamping plate, which is opposite to the second clamping plate, and two corresponding shaping gaps are closed to form a channel through which a plastic bar can pass.
5. The multi-station extrusion plastic bar production line according to claim 4, wherein the second clamping plate is connected with the supporting plate through a second driving part, the second clamping plate is connected with the first clamping plate through a transmission part, the second driving part is used for driving the second clamping plate to move towards the first clamping plate, and the second clamping plate can be driven to move towards the first clamping plate through the transmission part while moving.
6. The multi-station extrusion plastic bar production line according to claim 5, wherein end plates are fixedly arranged at the ends of the first clamping plate and the second clamping plate, a column casing is fixedly arranged at one side of the end plates, the transmission part comprises a transmission shaft rod, two sets of thread sections with opposite rotation directions are arranged on the transmission shaft rod, one end of the transmission shaft rod is rotationally connected with the supporting plate, the transmission shaft pipe vertically penetrates through the two sets of column casings, and the two sets of column casings are respectively in threaded fit with the two sets of thread sections.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110844595.9A CN113561441B (en) | 2021-07-26 | 2021-07-26 | Multi-station extrusion plastic bar production line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110844595.9A CN113561441B (en) | 2021-07-26 | 2021-07-26 | Multi-station extrusion plastic bar production line |
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| CN113561441A CN113561441A (en) | 2021-10-29 |
| CN113561441B true CN113561441B (en) | 2023-05-05 |
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| JP2012240367A (en) * | 2011-05-23 | 2012-12-10 | Mitsubishi Electric Corp | Extrusion molding device |
| CN210023320U (en) * | 2019-02-27 | 2020-02-07 | 江门市翔凤不锈钢有限公司 | Pneumatic correction bending device of high quality stainless steel pipe |
| CN112246919B (en) * | 2020-10-14 | 2022-07-22 | 唐山骏源实业有限公司 | Metal section straightening machine |
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