CN114889112B - Plastic pipe production method - Google Patents
Plastic pipe production method Download PDFInfo
- Publication number
- CN114889112B CN114889112B CN202210442593.1A CN202210442593A CN114889112B CN 114889112 B CN114889112 B CN 114889112B CN 202210442593 A CN202210442593 A CN 202210442593A CN 114889112 B CN114889112 B CN 114889112B
- Authority
- CN
- China
- Prior art keywords
- flanging
- plastic pipe
- flange
- port
- positioning sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229920003023 plastic Polymers 0.000 title claims abstract description 92
- 239000004033 plastic Substances 0.000 title claims abstract description 92
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000001125 extrusion Methods 0.000 claims abstract description 30
- 238000000465 moulding Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 238000005485 electric heating Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Images
Classifications
-
- 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
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/12—Dielectric heating
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1616—Cooling using liquids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention discloses a plastic pipe production method, which sequentially comprises the steps of extrusion molding, molding traction and cutting, and further comprises the step of molding a flanging flange at a port of a cut plastic pipe, wherein the step uses a plastic pipe port flanging device, and the step of molding the flanging flange at the port of the plastic pipe by adopting the device comprises the following steps: fixing the plastic pipe by a fixing mechanism; heating and softening the port of the plastic pipe through a heating mechanism; flaring the port of the plastic pipe through a flaring mechanism to enable the port of the plastic pipe to be flared outwards; and extruding and shaping the flaring end of the plastic pipe through a flanging forming mechanism to form a flanging flange, and forming a flange hole on the flanging flange through a flange hole forming mechanism. According to the plastic pipe production method, the flange holes are formed in the flange at the same time when the flange is formed at the end opening of the plastic pipe, so that the working procedures are effectively reduced, and the manufacturing efficiency of the flange is improved.
Description
Technical Field
The invention relates to a plastic pipe production method.
Background
The plastic pipe is generally made up by using synthetic resin, i.e. polyester as raw material, adding stabilizing agent, lubricant and plasticizer, etc. and adopting a plastic method to make extrusion processing on the internal diameter of pipe-making machine. The existing plastic pipe production process mainly comprises the steps of extrusion molding, molding traction, cutting and the like, and the whole process is relatively mature and can basically meet the production of various pipes. After the plastic pipe is cut, in order to facilitate connection of the plastic pipe, flanging treatment is required to be performed on the port of the plastic pipe so as to form a flanging flange on the port of the plastic pipe. The plastic pipe with the flanging flange has stronger practicability, on one hand, the pipe orifice becomes smooth and is not easy to hurt people, and on the other hand, the flange is provided with the bolts so that the plastic pipe can be similar to a flange connection structure, the connection is firmer, and the sealing effect is better. After the flanging process is completed, the conventional plastic pipe needs to be transferred to a drilling device, and a flange hole for bolts to pass through is drilled on the flanging by the drilling device. However, the mode is complicated to operate, and the plastic pipe needs to be transported and fixed for many times, so that the flange flanging flange manufacturing efficiency is low, and the production efficiency is improved by enterprises.
Disclosure of Invention
The invention aims to provide a plastic pipe production method, which is characterized in that a flange hole is formed on a flanging flange while a flanging flange is formed at a plastic pipe port, so that the working procedures are effectively reduced, and the manufacturing efficiency of the flanging flange is improved.
In order to achieve the above object, the technical scheme of the invention is to design a plastic pipe production method, which sequentially comprises the steps of extrusion molding, molding traction and cutting, and further comprises the step of molding a flanging flange at a port of the cut plastic pipe, wherein the step uses a plastic pipe port flanging device, the plastic pipe port flanging device comprises a base, a fixing mechanism, a heating mechanism, a flaring mechanism, a flanging molding mechanism and a flange hole molding mechanism, and the step of molding the flanging flange at the port of the plastic pipe by adopting the plastic pipe port flanging device comprises the following steps:
fixing the plastic pipe by a fixing mechanism;
heating and softening the port of the plastic pipe through a heating mechanism;
flaring the port of the plastic pipe through a flaring mechanism to enable the port of the plastic pipe to be flared outwards;
and extruding and shaping the flaring end of the plastic pipe through a flanging forming mechanism to form a flanging flange, and forming a flange hole on the flanging flange through a flange hole forming mechanism.
Preferably, the fixing mechanism comprises a pipe clamp mounted on the base by a first fixing base plate.
Preferably, the heating mechanism comprises a positioning sleeve and an electric heating element arranged in the positioning sleeve, the positioning sleeve is arranged on the base through a second fixed bottom plate, and the positioning sleeve is sleeved at the port of the plastic pipe.
Preferably, the flanging forming mechanism comprises a flanging die and a linear driving mechanism, the flanging die is located above the base, the flanging die is arranged opposite to the positioning sleeve, the linear driving mechanism is located on one side of the flanging die, which is opposite to the positioning sleeve, the output end of the linear driving mechanism is fixedly connected with the flanging die through a connecting plate, the linear driving mechanism is used for driving the flanging die and the positioning sleeve to be closed or separated, a supporting convex column and an edge convex ring are arranged on the side part of the flanging die, which faces the positioning sleeve, the supporting convex column is used for extending into a plastic pipe port, an annular groove for the edge convex ring to extend in is formed on the side part of the positioning sleeve, and an extrusion cavity is formed when the flanging die and the positioning sleeve are closed.
Preferably, the flange hole forming mechanism comprises a plurality of extrusion heads arranged on the side part of the flanging die, the plurality of extrusion heads are positioned between the supporting convex columns and the edge convex rings, and the plurality of extrusion heads are uniformly distributed along the circumferential direction of the flanging die.
Preferably, the inner diameter of the positioning sleeve is equal to the outer diameter of the plastic pipe, and the outer diameter of the supporting convex column is equal to the inner diameter of the plastic pipe.
Preferably, the plastic pipe port flanging device further comprises a cooling mechanism, and the cooling mechanism comprises a cooling water channel arranged inside the flanging die.
Preferably, the linear driving mechanism is a hydraulic cylinder.
The invention has the advantages and beneficial effects that: the plastic pipe production method is characterized in that flange holes are formed in the flange at the same time of forming the flange at the port of the plastic pipe, so that the working procedures are effectively reduced, and the manufacturing efficiency of the flange is improved.
Drawings
FIG. 1 is a schematic diagram of a plastic tubing port flanging apparatus of the present invention.
Fig. 2 is an enlarged view at a in fig. 1.
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
as shown in fig. 1 and 2, a plastic pipe production method sequentially comprises the steps of extrusion molding, molding traction and cutting, and further comprises the step of molding a flanging flange 101 at a port of a cut plastic pipe 100, wherein the step uses a plastic pipe port flanging device, the plastic pipe port flanging device comprises a base 1, a fixing mechanism, a heating mechanism, a flaring mechanism, a flanging molding mechanism, a flange hole molding mechanism and a cooling mechanism, the fixing mechanism comprises a pipe fitting clamp 2, the pipe fitting clamp 2 is arranged on the base 1 through a first fixing bottom plate 3, the heating mechanism comprises a positioning sleeve 4 and an electric heating element 5 arranged in the positioning sleeve 4, the positioning sleeve 4 is arranged on the base 1 through a second fixing bottom plate 6, the positioning sleeve 4 is sleeved at the port of the plastic pipe 100, the flanging die 7 and a linear driving mechanism 8 are arranged above the base 1, the flanging die 7 and the positioning sleeve 4 are oppositely arranged, the linear driving mechanism 8 is arranged at one side of the flanging die 7, the linear driving mechanism is arranged at the back side of the positioning sleeve 7, the linear driving mechanism 8 is connected with an annular groove 7 through an output end 9 of the linear driving mechanism and a flange 7, the side of the flange 7 is provided with a plurality of positioning sleeve 7, the positioning sleeve 72 is arranged at the side part of the flange 7, which is provided with a positioning sleeve 72 for forming a positioning sleeve, when the flange 7 is connected with the positioning sleeve 7 through a sealing flange 7, and the side part of the positioning sleeve is provided with the flange 7, and the flange 7 is provided with a side part of a positioning sleeve 72, and the flange 7 is provided with a positioning flange 7, when the flange is provided with a positioning sleeve is provided with a positioning flange 72, and a positioning flange is provided with a positioning flange for a positioning flange, and a flange for being positioned, and a flange is positioned, the extrusion heads 10 are positioned between the supporting convex columns 71 and the edge convex rings 72, the extrusion heads 10 are uniformly distributed along the circumferential direction of the flanging die 7, and the cooling mechanism comprises a cooling water channel 11 arranged inside the flanging die 7; the step of forming the flanging flange 101 on the port of the plastic pipe 100 by adopting the plastic pipe port flanging device comprises the following steps:
the plastic pipe 100 is fixed through a fixing mechanism, specifically, the plastic pipe 100 horizontally placed on the pipe fitting clamp 2 is clamped and fixed through the pipe fitting clamp, and a port to be flanged of the plastic pipe 100 passes through the positioning sleeve 4;
the port of the plastic pipe 100 is heated and softened through the heating mechanism, specifically, the electric heating element 5 is electrified and heats the positioning sleeve 4, and the positioning sleeve 4 transfers heat to the port to be flanged of the plastic pipe 100, so that the port to be flanged of the plastic pipe 100 is heated and softened;
the port of the plastic pipe 100 is flared through the flaring mechanism, so that the port of the plastic pipe 100 is flared outwards to form a horn shape, and the flaring mechanism is withdrawn after the flaring operation is finished; the specific structure and the working mode of the flaring mechanism are all the prior art, and the specific form of the flaring mechanism has various choices and is not used as the invention point of the present invention and is not described in detail herein;
the flaring end of the plastic pipe 100 is extruded and shaped through a flanging forming mechanism to form a flanging flange 101, and a flange hole is formed on the flanging flange 101 through a flange hole forming mechanism; specifically, the flanging die 7 is driven to translate towards the positioning sleeve 4 by the linear driving mechanism 8, the electric heating element 5 can be kept in an electrified state in the process, so that the flaring end of the plastic pipe 100 is continuously heated and keeps soft, the supporting convex column 71 on the flanging die 7 stretches into the plastic pipe 100 in advance when the flanging die 7 translates, the plastic pipe 100 is prevented from being deformed, then the edge convex ring 72 stretches into the annular groove 41, the flanging die 7 extrudes and bends the flaring end to form a flanging flange 101, meanwhile, the extrusion head 10 extrudes a flange hole on the flanging flange 101 and plastically deforms the flanging flange 101, when the edge convex ring 72 stretches into place, the flanging die 7 and the positioning sleeve 4 finish closing, the end part of the extrusion head 10 is abutted against the positioning sleeve 4, the extrusion head 10 expands and fills the whole extrusion cavity in the process of extruding the flanging flange 101, the inner wall of the extrusion cavity can apply radial pressure to the flanging flange 101, the flanging flange 101 is coated on the outside the extrusion head 10, so that the flanging flange 101 forms a regular flange hole, and the electric heating element 5 is powered off after the completion;
the flanging flange 101 of the plastic pipe 100 is cooled through the cooling mechanism, specifically, cooling water is introduced into the cooling channel 11, the cooling water takes up heat of the flanging flange 101, the flanging flange 101 is cooled and hardened rapidly, then the linear driving mechanism 8 drives the flanging die 7 to translate away from the positioning sleeve 4, the flanging die 7 is separated from the positioning sleeve 4, and finally the processed plastic pipe 100 is taken out.
Further, the inner diameter of the positioning sleeve 4 is equal to the outer diameter of the plastic pipe 100, and the outer diameter of the supporting boss 71 is equal to the inner diameter of the plastic pipe 100.
Further, the linear driving mechanism 8 is a hydraulic cylinder.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (5)
1. The plastic pipe production method sequentially comprises the steps of extrusion molding, molding traction and cutting, and is characterized by further comprising the step of molding a flanging flange at a cut plastic pipe port, wherein the step uses plastic pipe port flanging equipment which comprises a base, a fixing mechanism, a heating mechanism, a flaring mechanism, a flanging molding mechanism and a flange hole molding mechanism, and the step of molding the flanging flange at the plastic pipe port by adopting the plastic pipe port flanging equipment comprises the following steps of:
fixing the plastic pipe by a fixing mechanism;
the port of the plastic pipe is heated and softened through the heating mechanism, the heating mechanism comprises a positioning sleeve and an electric heating element arranged in the positioning sleeve, the positioning sleeve is arranged on the base through a second fixed bottom plate, and the positioning sleeve is sleeved at the port of the plastic pipe;
flaring the port of the plastic pipe through a flaring mechanism to enable the port of the plastic pipe to be flared outwards;
extruding and shaping the flaring end of the plastic pipe through a flanging forming mechanism to form a flanging flange, and forming a flange hole on the flanging flange through a flange hole forming mechanism; the flanging forming mechanism comprises a flanging die and a linear driving mechanism, the flanging die is positioned above the base, the flanging die is arranged opposite to the positioning sleeve, the linear driving mechanism is positioned on one side of the flanging die, which is opposite to the positioning sleeve, the output end of the linear driving mechanism is fixedly connected with the flanging die through a connecting plate, the linear driving mechanism is used for driving the flanging die and the positioning sleeve to be closed or separated, a supporting convex column and an edge convex ring are arranged on the side part of the flanging die, which faces the positioning sleeve, the supporting convex column is used for extending into a plastic pipe port, an annular groove for the edge convex ring to extend in is formed on the side part of the positioning sleeve, which faces the flanging die, and an extrusion cavity is formed when the flanging die and the positioning sleeve are closed; the flange hole forming mechanism comprises a plurality of extrusion heads arranged on the side part of the flanging die, the plurality of extrusion heads are positioned between the supporting convex columns and the edge convex rings, and the plurality of extrusion heads are uniformly distributed along the circumferential direction of the flanging die; the above-mentioned through the flanging forming mechanism to the flaring end extrusion shaping of plastics tubular product form flange, the concrete process of shaping flange hole on flange through flange hole forming mechanism simultaneously is as follows:
the flanging die is driven to translate towards the locating sleeve through the linear driving mechanism, the electric heating element can be kept in an electrified state in the process, so that the flaring end of the plastic pipe is continuously heated and kept soft, the supporting convex column on the flanging die stretches into the plastic pipe in advance when the flanging die translates, the plastic pipe is prevented from being deformed, the edge convex ring stretches into the annular groove, the flaring end is extruded and bent by the flanging die to form a flanging flange, meanwhile, the extrusion head extrudes a flange hole on the flanging flange, the flanging flange is plastically deformed, when the edge convex ring stretches into place, the flanging die and the locating sleeve are closed, the end part of the extrusion head abuts against the locating sleeve at the moment, the extrusion head expands and fills the whole extrusion cavity in the extrusion hole process, so that the flanging flange is shaped, radial pressure is applied to the flanging flange by the inner wall of the extrusion cavity, the flanging flange is coated outside the extrusion head, the flanging flange hole is formed, and after the flanging flange hole is finished, the electric heating element is powered off.
2. The method of producing plastic tubing of claim 1, wherein the securing mechanism comprises a tube clamp mounted to the base by a first securing base plate.
3. The method of producing plastic tubing according to claim 2, wherein the inner diameter of the positioning sleeve is equal to the outer diameter of the plastic tubing, and the outer diameter of the support post is equal to the inner diameter of the plastic tubing.
4. A plastic pipe production method according to claim 3, wherein the plastic pipe port flanging device further comprises a cooling mechanism including a cooling water channel provided inside the flanging die.
5. The method of producing plastic tubing of claim 4, wherein the linear drive mechanism is a hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210442593.1A CN114889112B (en) | 2022-04-26 | 2022-04-26 | Plastic pipe production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210442593.1A CN114889112B (en) | 2022-04-26 | 2022-04-26 | Plastic pipe production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114889112A CN114889112A (en) | 2022-08-12 |
| CN114889112B true CN114889112B (en) | 2023-07-14 |
Family
ID=82717691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210442593.1A Active CN114889112B (en) | 2022-04-26 | 2022-04-26 | Plastic pipe production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114889112B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309475A (en) * | 1989-05-25 | 1990-12-25 | Mitsubishi Electric Corp | Automatic issuing device for certificate |
| JP2004092437A (en) * | 2002-08-29 | 2004-03-25 | Ebara Corp | Pipe fixing structure of water supply device |
| JP2007303569A (en) * | 2006-05-11 | 2007-11-22 | Kunitekku:Kk | Flanged pipe |
| CN103707500A (en) * | 2013-12-30 | 2014-04-09 | 北京工业大学 | Plastic pipe edge turning device and using method thereof |
| CN204136448U (en) * | 2014-09-29 | 2015-02-04 | 江阴德玛斯特钻具有限公司 | The flanging production line of flanging type drilling rod protective sleeve |
| CN108709042A (en) * | 2018-08-01 | 2018-10-26 | 山东柯林瑞尔管道工程有限公司 | One kind giving flanged fitting Lining device |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2638503C2 (en) * | 1975-08-30 | 1983-01-13 | Kubota Ltd., Osaka | Device for forming a connecting sleeve |
| JPH10227380A (en) * | 1997-02-14 | 1998-08-25 | Shimoda Kogyo Kk | Flanged pipe joint |
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| JP2007239537A (en) * | 2006-03-07 | 2007-09-20 | Nichias Corp | Exhaust pipe flange joint structure |
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| JP6078285B2 (en) * | 2012-10-03 | 2017-02-08 | ダイニチ工業株式会社 | Case penetration structure |
| DE102014004157B4 (en) * | 2014-03-17 | 2015-11-12 | Technische Universität Dresden | Process for the production of load introduction flanges on fiber-reinforced hollow profiles with thermoplastic matrix |
| JP6978993B2 (en) * | 2018-08-29 | 2021-12-08 | 日立Ｇｅニュークリア・エナジー株式会社 | Flange joint fastening method |
| CN112628497A (en) * | 2020-12-23 | 2021-04-09 | 安徽实纽机械设备有限公司 | Anti-leakage chemical pipeline flange |
| CN113941742B (en) * | 2021-11-23 | 2024-04-09 | 苏州众捷汽车零部件股份有限公司 | Pipe joint flange, forming gear shaping cutter and processing technology |
-
2022
- 2022-04-26 CN CN202210442593.1A patent/CN114889112B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02309475A (en) * | 1989-05-25 | 1990-12-25 | Mitsubishi Electric Corp | Automatic issuing device for certificate |
| JP2004092437A (en) * | 2002-08-29 | 2004-03-25 | Ebara Corp | Pipe fixing structure of water supply device |
| JP2007303569A (en) * | 2006-05-11 | 2007-11-22 | Kunitekku:Kk | Flanged pipe |
| CN103707500A (en) * | 2013-12-30 | 2014-04-09 | 北京工业大学 | Plastic pipe edge turning device and using method thereof |
| CN204136448U (en) * | 2014-09-29 | 2015-02-04 | 江阴德玛斯特钻具有限公司 | The flanging production line of flanging type drilling rod protective sleeve |
| CN108709042A (en) * | 2018-08-01 | 2018-10-26 | 山东柯林瑞尔管道工程有限公司 | One kind giving flanged fitting Lining device |
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| Publication number | Publication date |
|---|---|
| CN114889112A (en) | 2022-08-12 |
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