CN112372973A - One-out-two-in-two composite double-layer rubber pipe production line - Google Patents
One-out-two-in-two composite double-layer rubber pipe production line Download PDFInfo
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- CN112372973A CN112372973A CN202010657813.3A CN202010657813A CN112372973A CN 112372973 A CN112372973 A CN 112372973A CN 202010657813 A CN202010657813 A CN 202010657813A CN 112372973 A CN112372973 A CN 112372973A
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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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
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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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
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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
- B29C48/30—Extrusion nozzles or dies
- B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a production line for a one-out-two-layer composite double-layer rubber pipe, which belongs to the technical field of production devices and comprises a first composite extruder, a second composite extruder, a third composite extruder, a composite machine head, a cooling frame, a cutting machine and a conveyor, wherein the third composite extruder is arranged on the side surface of the first composite extruder, the first composite extruder is arranged on the right side of the first composite extruder and the right side of the third composite extruder, the one-out-two-layer composite double-layer rubber pipe production line is characterized in that the composite machine head is combined at the output end of the extruders, the composite machine head is matched with an auxiliary plate to be connected with a runner plate carrying a runner, and the two port dies are matched to be communicated with an inner channel, so that the purpose of a double-composite production line is formed while a rubber sealing strip is synchronously and singly extruded, the production purpose of double-out-two-cutting is achieved, the personnel consumption is saved, the operation is simple, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of production devices, in particular to a production line for double-outlet double-composite double-layer rubber pipes.
Background
The rubber tube is a tube for gas transport, and is commonly used for gas welding, gas cutting, various gas shielded welding, plasma arc welding, cutting, and the like. Two types of rubber pipes are used for welding, the oxygen pipe is used as a blue pipe according to the national standard, and the maximum using pressure is 1.5 MPa; the red tube or the black tube is an acetylene tube, and the allowable pressure is 0.5-I.OMPa. The rubber tube has the characteristics of physiological inertia, ultraviolet ray resistance, ozone resistance, high and low temperature resistance (-80 to 300 ℃), high transparency, strong resilience, compression permanent deformation resistance, oil resistance, stamping resistance, acid and alkali resistance, wear resistance, flame resistance, voltage resistance, electric conduction and the like.
In the production process of the rubber tube, a production device is required, wherein the production device comprises an extruding and cutting device.
The existing rubber tube production process mainly adopts single-line production, and after the rubber tube is extruded, a combined piece is required to be arranged for subsequent cooling, cutting and transmission, so that the personnel consumption is generated, the energy consumption and economic waste are increased, and the working efficiency is reduced while the operation simplicity cannot be ensured.
Disclosure of Invention
The invention aims to provide a production line for producing a double-outlet double-layer composite rubber pipe, which aims to solve the problems that the existing production process of the rubber pipe in the background art is mainly based on single-line production, and a combined piece is required to be arranged for subsequent cooling, cutting and transmission after the rubber pipe is extruded, so that the personnel consumption is generated, the energy consumption and economic waste are increased, the operation simplicity cannot be ensured, and the working efficiency is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a one-outlet double-composite double-layer rubber pipe production line comprises a first composite extruder, a second composite extruder, a third composite extruder, a composite machine head, a cooling frame, a cutting machine and a conveyor, wherein the third composite extruder is arranged on the side surface of the first composite extruder, the first composite extruder is arranged on the right side of the first composite extruder and the right side of the third composite extruder, the output ends of the first composite extruder, the second composite extruder and the third composite extruder are fixedly connected with the composite machine head, the output end of the composite machine head is contacted with the cooling frame, the output end of the cooling frame is contacted with the cutting machine, the output end of the cutting machine is contacted with the conveyor, the inner side of the composite machine head is fixedly connected with a main auxiliary plate and an auxiliary plate through screws, the outer side of the composite machine head is fixedly connected with a main runner plate and an auxiliary runner plate through screws, the top of the main runner plate is provided with a main runner, the bottom of the auxiliary runner plate is provided with an auxiliary runner, the right side wall of the composite machine head is provided with a side runner, the inside of the composite machine head is provided with an inner runner, the input ends of the main runner, the auxiliary runner and the side runner are communicated with the inner runner, the left side wall of the composite machine head is provided with a main mouth mold and an auxiliary mouth mold in a thread refining stage, and the output end of the inner runner is communicated with the main mouth mold and the auxiliary mouth mold.
Preferably, the right side wall of the cooling frame is fixedly connected with a diameter measuring instrument through a screw, and the input end of the diameter measuring instrument and the output end of the composite machine head are on the same horizontal line.
Preferably, the bottom of the cooling frame is fixedly connected with an underframe through a bolt, and the bottom of the underframe is fixedly connected with a fixing foot through a bolt.
Preferably, a main interceptor and a sub interceptor are fixedly connected to a right side wall of the interceptor by bolts, and input ends of the main interceptor and the sub interceptor are on the same horizontal line with an output end of the cooling rack.
Preferably, the top of the conveyor is rotatably connected with a main conveying belt and an auxiliary conveying belt, and the input ends of the main conveying belt and the auxiliary conveying belt are on the same horizontal line with the output end of the cutting machine.
Preferably, the top of the cooling frame is fixedly connected with a cold water tank through bolts, a refrigerant is arranged in the cold water tank, and circulating pumps carrying pipe fittings are arranged at two ends of the cold water tank.
Compared with the prior art, the invention has the beneficial effects that: this kind of one goes out two compound double-deck rubber tube production lines of two, through the combination application of accessory, at the compound aircraft nose of the output combination of extruder, compound aircraft nose cooperation accessory plate is connected the runner plate that carries the runner, two neck molds of cooperation link up with the interior way, can be when the rubber sealing strip is extruded to synchronous singleness, form two compound production lines's purpose, reach two production purposes of extruding two cutoffs, save personnel's consumption, the waste of energy consumption and sub-assembly has been reduced, easy operation has promoted work efficiency in the time.
Drawings
FIG. 1 is a schematic view of the overall structure of a production apparatus according to the present invention;
FIG. 2 is a schematic top view of the production apparatus of the present invention;
FIG. 3 is a schematic view of the composite extruder assembly of the present invention;
fig. 4 is a schematic view of the structure of the composite machine of the present invention.
In the figure: 100 first compound extruder, 110 second compound extruder, 120 third compound extruder, 200 compound machine head, 201 main auxiliary plate, 202 auxiliary plate, 210 main runner plate, 220 main runner, 230 auxiliary runner plate, 240 auxiliary runner, 250 side runner, 260 main mouth mold, 270 auxiliary mouth mold, 300 cooling frame, 310 diameter measuring instrument, 320 bottom frame, 400 cutter, 410 main cutter, 420 auxiliary cutter, 500 conveyor, 510 main conveyor belt, 520 auxiliary conveyor belt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a production line for double-outlet double-layer composite rubber pipes, which is convenient for reducing energy consumption and improving efficiency by combining and applying accessories, and please refer to fig. 1-4, and comprises a first composite extruder 100, a second composite extruder 110, a third composite extruder 120, a composite machine head 200, a cooling frame 300, a cutting machine 400 and a conveyor 500;
referring to fig. 2 again, the first compound extruder 100 is provided with a second compound extruder 110 and a third compound extruder 120 on the side surface, specifically, the third compound extruder 120 is provided on the side surface of the first compound extruder 100, and the first compound extruder 100 is provided on the right side of the first compound extruder 100 and the third compound extruder 120;
referring to fig. 1-4 again, the right side wall of the compound head 200 is fixedly connected to the left side wall of the second compound extruder 110, specifically, the output ends of the first compound extruder 100, the second compound extruder 110 and the third compound extruder 120 are fixedly connected to the compound head 200, the inner side of the compound head 200 is fixedly connected to the main auxiliary plate 201 and the auxiliary plate 202 through screws, the outer side of the compound head 200 is fixedly connected to the main runner plate 210 and the auxiliary runner plate 230 through screws, the top of the main runner plate 210 is provided with the main runner 220, the bottom of the auxiliary runner plate 230 is provided with the auxiliary runner 240, the right side wall of the compound head 200 is provided with the side runner 250, the interior of the compound head 200 is provided with the inner runner, the main runner 220, the input ends of the auxiliary flow channel 240 and the side flow channel 250 are communicated with an inner channel, a main mouth mold 260 and an auxiliary mouth mold 270 are arranged on the left side wall thread refining stage of the composite machine head 200, and the output end of the inner channel is communicated with the main mouth mold 260 and the auxiliary mouth mold 270;
referring to fig. 1-3 again, the right sidewall of the cooling frame 300 is fixedly connected to the left sidewall of the first compound extruder 100, and specifically, the output end of the compound head 200 contacts the cooling frame 300;
referring to fig. 1 again, the right sidewall of the guillotine 400 is fixedly connected to the left sidewall of the cooling rack 300, specifically, the output end of the cooling rack 300 contacts the guillotine 400;
referring to fig. 1 again, the right sidewall of the conveyor 500 is fixedly connected to the left sidewall of the guillotine 400, specifically, the output end of the guillotine 400 contacts the conveyor 500;
when the double-compound double-extrusion die is used specifically, the first compound extruder 100 and the third compound extruder 120 are oppositely arranged, the second compound extruder 110 is arranged on the side surface, the main auxiliary plate 201 and the auxiliary plate 202 are arranged on the inner side of the compound machine head 200 to be matched with the main runner plate 210 carrying the main runner 220 and the auxiliary runner plate 230 carrying the auxiliary runner 240 for installation, the main die 260 and the auxiliary die 270 are combined on the side surface of the compound machine head 200, the side runner 250 is connected with the second compound extruder 110, the main runner 220 and the auxiliary runner 240 are respectively connected with the third compound extruder 120 and the first compound extruder 100 and are matched with the inner runner for transmission, and are transmitted through the main die 260 and the auxiliary die 270 to achieve the purpose of double-compound double-extrusion, the cooling frame 300 carrying the caliper 310 is combined on the side surface of the compound machine head 200, and can be matched with the caliper for cooling, and are matched with the chopper 400 containing the main chopper 410 and the auxiliary chopper 420 for chopping after cooling, and is matched with a conveyor 500 with a main conveyor belt 510 and an auxiliary conveyor belt 520 for conveying, thereby achieving the production purposes of double cutting and double conveying.
Referring to fig. 1 again, in order to facilitate the matching detection and ensure the validity of the detection, specifically, the right side wall of the cooling rack 300 is fixedly connected with a diameter measuring instrument 310 through screws, and the input end of the diameter measuring instrument 310 is on the same horizontal line with the output end of the composite handpiece 200.
Referring to fig. 1 again, in order to facilitate bottom support, the cooling rack 300 is kept stable, and the cooling rack 300 can achieve a cooling effect, specifically, the bottom of the cooling rack 300 is fixedly connected with an underframe 320 through bolts, the bottom of the underframe 320 is fixedly connected with fixing legs through bolts, the top of the cooling rack 300 is fixedly connected with a cold water tank through bolts, a refrigerant is arranged inside the cold water tank, and circulating pumps carrying pipe fittings are arranged at two ends of the cold water tank.
Referring to fig. 1 again, in order to facilitate the cutting operation, specifically, the right sidewall of the cutter 400 is fixedly connected with a main cutter 410 and a sub cutter 420 by bolts, and input ends of the main cutter 410 and the sub cutter 420 are on the same horizontal line with an output end of the cooling rack 300.
Referring to fig. 2 again, in order to make the conveyor 500 capable of achieving the purpose of double-line conveying, specifically, the top of the conveyor 500 is rotatably connected with a main conveyor belt 510 and an auxiliary conveyor belt 520, and the input ends of the main conveyor belt 510 and the auxiliary conveyor belt 520 are on the same horizontal line with the output end of the guillotine 400.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. The utility model provides a compound double-deck rubber tube production line of one play duplex which characterized in that: including first compound extruder (100), second compound extruder (110), third compound extruder (120), compound aircraft nose (200), cooling frame (300), clipper (400) and conveyer (500), the side of first compound extruder (100) sets up third compound extruder (120), first compound extruder (100) with the right side of third compound extruder (120) sets up first compound extruder (100), second compound extruder (110) and the output fixed connection of third compound extruder (120) compound aircraft nose (200), the output contact of compound aircraft nose (200) cooling frame (300), the output contact of cooling frame (300) clipper (400), the output contact of clipper (400) conveyer (500), the inner side of the composite machine head (200) is fixedly connected with a main auxiliary plate (201) and an auxiliary plate (202) through screws, the outer side of the composite machine head (200) is fixedly connected with a main runner plate (210) and an auxiliary runner plate (230) through screws, the top of the main flow channel plate (210) is provided with a main flow channel (220), the bottom of the auxiliary flow channel plate (230) is provided with an auxiliary flow channel (240), the right side wall of the composite machine head (200) is provided with a side runner (250), the interior of the composite machine head (200) is provided with an inner runner, the input ends of the main flow passage (220), the auxiliary flow passage (240) and the side flow passage (250) are communicated with the inner passage, the left side wall thread refining stage of the composite machine head (200) is provided with a main mouth mold (260) and an auxiliary mouth mold (270), the output end of the inner channel is communicated with the main mouth mold (260) and the auxiliary mouth mold (270).
2. The production line of one-out-two-in-two composite double-layer rubber hoses according to claim 1, characterized in that: the right side wall of the cooling frame (300) is fixedly connected with a diameter measuring instrument (310) through screws, and the input end of the diameter measuring instrument (310) and the output end of the composite machine head (200) are on the same horizontal line.
3. The production line of one-out-two-in-two composite double-layer rubber hoses according to claim 1, characterized in that: the bottom of the cooling frame (300) is fixedly connected with an underframe (320) through bolts, and the bottom of the underframe (320) is fixedly connected with fixing legs through bolts.
4. The production line of one-out-two-in-two composite double-layer rubber hoses according to claim 1, characterized in that: the right side wall of the cutter (400) is fixedly connected with a main cutter (410) and an auxiliary cutter (420) through bolts, and the input ends of the main cutter (410) and the auxiliary cutter (420) are on the same horizontal line with the output end of the cooling rack (300).
5. The production line of one-out-two-in-two composite double-layer rubber hoses according to claim 1, characterized in that: the top of the conveyor (500) is rotatably connected with a main conveyor belt (510) and an auxiliary conveyor belt (520), and the input ends of the main conveyor belt (510) and the auxiliary conveyor belt (520) are on the same horizontal line with the output end of the guillotine (400).
6. The production line of one-out-two-in-two composite double-layer rubber hoses according to claim 1, characterized in that: the top of the cooling frame (300) is fixedly connected with a cold water tank through bolts, a refrigerant is arranged in the cold water tank, and circulating pumps carrying pipe fittings are arranged at two ends of the cold water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010657813.3A CN112372973A (en) | 2020-07-09 | 2020-07-09 | One-out-two-in-two composite double-layer rubber pipe production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010657813.3A CN112372973A (en) | 2020-07-09 | 2020-07-09 | One-out-two-in-two composite double-layer rubber pipe production line |
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| Publication Number | Publication Date |
|---|---|
| CN112372973A true CN112372973A (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010657813.3A Pending CN112372973A (en) | 2020-07-09 | 2020-07-09 | One-out-two-in-two composite double-layer rubber pipe production line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201291583Y (en) * | 2008-11-28 | 2009-08-19 | 桂林泓成橡塑科技有限公司 | Composite extrusion product line for triangular glue |
| CN205522381U (en) * | 2015-12-25 | 2016-08-31 | 杜崇铭 | Quick shaping material plastifying double -line production system of intelligent 3D |
| CN107186985A (en) * | 2017-06-16 | 2017-09-22 | 苏州金纬管道科技有限公司 | The compound extruded system of pipe production line |
| CN207059164U (en) * | 2017-06-16 | 2018-03-02 | 苏州金纬管道科技有限公司 | The compound extruded system of pipe production line |
| CN208324145U (en) * | 2018-06-14 | 2019-01-04 | 建新赵氏集团有限公司 | EPDM rubber sealing strip squeezes out head |
| CN208697908U (en) * | 2018-08-29 | 2019-04-05 | 陕西科技大学 | One kind one goes out two wood moulding wire rod extruding production lines |
| CN110181793A (en) * | 2019-07-03 | 2019-08-30 | 段文锋 | A kind of bilayer two-wire system electric wire extrusion head |
| CN110394962A (en) * | 2019-08-20 | 2019-11-01 | 仙居县创新机械设备有限公司 | A kind of rubber strip production whole line equipment of Dual-conveying tall co-extrusion |
| CN210791982U (en) * | 2019-10-29 | 2020-06-19 | 青岛威尔驰液压科技有限公司 | Novel oxygen acetylene pipe double-pipe extruder head |
-
2020
- 2020-07-09 CN CN202010657813.3A patent/CN112372973A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201291583Y (en) * | 2008-11-28 | 2009-08-19 | 桂林泓成橡塑科技有限公司 | Composite extrusion product line for triangular glue |
| CN205522381U (en) * | 2015-12-25 | 2016-08-31 | 杜崇铭 | Quick shaping material plastifying double -line production system of intelligent 3D |
| CN107186985A (en) * | 2017-06-16 | 2017-09-22 | 苏州金纬管道科技有限公司 | The compound extruded system of pipe production line |
| CN207059164U (en) * | 2017-06-16 | 2018-03-02 | 苏州金纬管道科技有限公司 | The compound extruded system of pipe production line |
| CN208324145U (en) * | 2018-06-14 | 2019-01-04 | 建新赵氏集团有限公司 | EPDM rubber sealing strip squeezes out head |
| CN208697908U (en) * | 2018-08-29 | 2019-04-05 | 陕西科技大学 | One kind one goes out two wood moulding wire rod extruding production lines |
| CN110181793A (en) * | 2019-07-03 | 2019-08-30 | 段文锋 | A kind of bilayer two-wire system electric wire extrusion head |
| CN110394962A (en) * | 2019-08-20 | 2019-11-01 | 仙居县创新机械设备有限公司 | A kind of rubber strip production whole line equipment of Dual-conveying tall co-extrusion |
| CN210791982U (en) * | 2019-10-29 | 2020-06-19 | 青岛威尔驰液压科技有限公司 | Novel oxygen acetylene pipe double-pipe extruder head |
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Application publication date: 20210219 |