CN106003749A - Equipment for producing large-diameter structural wall pipes and process for preparing pipes - Google Patents
Equipment for producing large-diameter structural wall pipes and process for preparing pipes Download PDFInfo
- Publication number
- CN106003749A CN106003749A CN201610481391.2A CN201610481391A CN106003749A CN 106003749 A CN106003749 A CN 106003749A CN 201610481391 A CN201610481391 A CN 201610481391A CN 106003749 A CN106003749 A CN 106003749A
- Authority
- CN
- China
- Prior art keywords
- inwall
- unit
- cage walls
- station unit
- forming unit
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 30
- 238000004804 winding Methods 0.000 claims abstract description 23
- 238000001746 injection moulding Methods 0.000 claims abstract description 8
- 238000009966 trimming Methods 0.000 claims abstract description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 15
- 238000001125 extrusion Methods 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 230000001413 cellular effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
-
- 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
- B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
- B29C53/821—Mandrels especially adapted for winding and joining
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/84—Heating or cooling
- B29C53/845—Heating or cooling especially adapted for winding and joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
Abstract
The invention relates to the technical field of preparation of structural wall pipes, in particular to equipment for producing large-diameter structural wall pipes and a process for preparing the pipes. The equipment comprises a bell and spigot injection molding unit, multiple winding station units, an inner wall forming unit, a clad pipe forming unit and a trimming unit. The inner wall forming unit and the clad pipe forming unit are provided with positions which are opposite to the multiple winding station units and can be adjusted. Two or three winding station units are adopted in the equipment for production; production capacity of the equipment can be fully utilized; and production efficiency is greatly improved. Inner walls and clad pipes are produced in different steps; compared with ring stiffness of pipes of the same structure and the same weight, ring stiffness of the pipes can be improved by 5-10%; and thus materials are saved.
Description
Technical field
The present invention relates to structure-wall pipe material preparing technical field, the production equipment being specifically related to a kind of heavy caliber structure-wall pipe material and the technique preparing tubing.
Background technology
nullTraditional structure-wall pipe material production technology，The high temperature and melt the melt body of state shape and extrude through internal layer and outer layer mould when producing，Simultaneously wound on Wound Dies，Form inwall and the layer structure wall of tubing respectively，Junction at outer wall Yu inwall，Because interior layered material and outer layered material are to combine under melting state，Tighten up because of cooling outer wall inner layer after in conjunction with，Extruding inwall is protruding outwardly against being formed by inner wall material，Because the cladding face of the protruding pair of interior support pipe of material is strengthened，The inner support tube high temperature because of outer layered material and with internal layer junction makes the phase be heated deliquescing，In tubing cooling procedure，Inner support tube can become oval (sd diminishes)，The centre of form diminishes away from (e) and total height (h)，The moment of inertia in tubing cross section diminishes，Thus the integral loop rigidity of tubing diminishes，The especially tubing of major diameter，Because inwall is the thickest，So inner support tube deformation is bigger，The ring stiffness impact overall on tubing is bigger.
It addition, traditional structure-wall pipe material production technology, be the operation of single pair of list due to take, mold exchange, preheat, the operation such as cooling, inevitably occupy a large amount of production time, seriously hinder the raising of production efficiency.
Summary of the invention
The invention aims to solve the problems referred to above, it is provided that the production equipment of a kind of heavy caliber structure-wall pipe material and the technique preparing tubing.
In order to reach foregoing invention purpose, the present invention by the following technical solutions:
A kind of production equipment of heavy caliber structure-wall pipe material, this equipment includes bell and spigot injection molding unit, some groups of winding station unit, inwall forming unit, cage walls forming units and trimming unit, inwall forming unit and cage walls forming unit have and are wound around the relative position that station unit can adjust；
Being wound around station unit and include pedestal and the Wound Dies being placed on pedestal, pedestal is provided with rolling mechanism and preheating apparatus, and preheating apparatus uses be connected adjustable relative to the position of mould with pedestal；
Inwall forming unit includes inwall extruder, inwall extrusion die and inwall heater；
Cage walls forming unit includes cage walls extruder, cage walls mould and cage walls heater.
As preferably, inwall forming unit and cage walls forming unit use guide rail to be connected with ground, or winding station unit uses guide rail to be connected with ground.
As preferably, the structure of described Wound Dies is:
Including central shaft, surround the left receipts plate of columnar main body, right receipts plate and lower receipts plate；
The lower inner wall of left receipts plate and right receipts plate is connected with central shaft by several rotation cylinder, and rotation cylinder lower end is hinged with left receipts plate or right receipts plate inwall, and upper end is hinged with central shaft；
The upper inside wall of left receipts plate and right receipts plate is installed with bending plate respectively, and two bending plates are the most hinged, and are connected with central shaft commonly through gripper shoe, and gripper shoe top is hinged with two bending plates, and gripper shoe is connected with central shaft below；
Lower receipts plate is connected with central shaft by vertical cylinder, and vertical cylinder upper end is connected with central shaft, and lower end is connected with lower receipts plate.
Use the technique that the production equipment of a kind of heavy caliber structure-wall pipe material prepares heavy caliber pipe, it is characterised in that comprise the following steps:
(1) use bell and spigot injection molding unit injection mo(u)lding to prepare bellmouth and socket, and bellmouth and socket are installed on the Wound Dies being wound around station unit；
(2) use preheating apparatus that the top of the Wound Dies that first is wound around on station unit is positioned at bellmouth or spigot preheats, after reaching predetermined temperature, use inwall extruder extrusion to prepare pipe material inner wall, and bonding with bellmouth or socket；Before tubing completes inwall winding, start preheating apparatus and the Wound Dies of socket or socket is preheated, and guarantee that, when inwall extruder reaches at this, Wound Dies temperature reaches production requirement；Inwall extruder for shaping completes inwall and socket or the bonding of bellmouth；And start second preheating apparatus being wound around on station unit before this is done, preheat in bellmouth or spigot on the top of this Wound Dies, and according to above-mentioned steps, second is wound around the combination of station unit and other pipe material inner wall windings being wound around station unit and inwall and bell and spigot；
(3), after the cooling of the tubing on station unit to be wound, use the cage walls extruder of cage walls forming unit that it is carried out the Wrapping formed of cage walls；Initially with preheating apparatus, the inwall of tubing is heated, then use cage walls extruder it to be extruded Wrapping formed, before Wrapping formed completing, start preheating apparatus pipe material inner wall on which on next one winding station unit and preheat；
(4) the winding station unit after being wound around by cage walls is transferred to amending unit and is modified and the demoulding.
As preferably, step (2) preheating apparatus is 120-160 DEG C to the heating-up temperature of preheating apparatus.
The present invention compared with prior art, provides the benefit that:
If using 2 or 3 to be wound around station unit to produce, after finishing first tubing, two extrusion systems (inwall forming unit and cage walls forming unit) move to next winding second tubing of station cellular manufacture at once, while second or the 3rd is wound around station cellular manufacture, the die change of band tubing on station unit can be wound around get off first the demoulding, without waiting for more mold exchange, the production capacity of equipment can be made full use of, be greatly improved production efficiency.
The winding station unit of 2 and more than 2, owing to eliminating because more mold exchange makes extrusion system time out of service, the preheating system of mould eliminates the mould pre-warmed time, and has the rotary work station cooling tubing of abundance, thus improves production efficiency.
Use inwall and cage walls substep to produce, after the cooling of inwall entirety is hardening, reheats its surface wrap cage walls, one, only have surface because of inwall be hot, inwall and cage walls junction are heated few, and it is few that the stay tube in cage walls absorbs heat, deforms little；Two, inwall cools down, cage walls (will not be extruded into outside and can strengthen bonded area because the material of junction is extruded into outside structural portion by cooling meat when being wound around, a stay tube is made to absorb more heat, cause bigger deformation), deformation and the outer wall extruding to inwall of a stay tube can be greatly reduced, reduce inner support tube oval (sd) degree, strengthen the centre of form away from (e) and total height (h), the moment of inertia in tubing cross section becomes big, thus the integral loop rigidity of tubing becomes big.Learning through test, using identical structure, identical weight, the ring stiffness of tubing can improve 5%-10%, thus save material.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of Wound Dies of the present invention；
Fig. 3 is the structural representation of Wound Dies duty of the present invention.
In figure: 1 bell and spigot injection molding unit, 2 are wound around station unit, 3 inwall forming units, 4 cage walls forming units, 5 trimming units, 6 guide rails, 201 pedestals, 202 Wound Dies, 203 rolling mechanisms, 204 preheating apparatus, 301 inwall extruders, 302 inwall extrusion dies, 303 inwall heaters, 401 cage walls extruders, 402 cage walls moulds, 403 cage walls heaters, 221 central shafts, 222 right receipts plates, 223 left receipts plates, receive plate 224 times, 225 rotation cylinder, 226 vertical cylinders, 227 gripper shoes, 228 bending plates.
Detailed description of the invention
Below by specific embodiment, technical scheme is further described explanation.
If without specified otherwise, the raw material employed in embodiments of the invention is raw material commonly used in the art, and the method employed in embodiment is the conventional method of this area.
Embodiment:
A kind of production equipment of heavy caliber structure-wall pipe material, this equipment includes bell and spigot injection molding unit 1, some groups of winding station unit 2, inwall forming unit 3, cage walls forming units 4 and trimming unit 5, inwall forming unit 3 and cage walls forming unit 4 have and are wound around the relative position that station unit 2 can adjust；Being wound around station unit 2 and include pedestal 201 and the Wound Dies 202 being placed on pedestal 201, pedestal 201 is provided with rolling mechanism 203 and preheating apparatus 204, and preheating apparatus 204 uses be connected adjustable relative to the position of mould with pedestal 201；Inwall forming unit 3 includes inwall extruder 301, inwall extrusion die 302 and inwall heater 303；Cage walls forming unit 4 includes cage walls extruder 401, cage walls mould 402 and cage walls heater 403.Inwall forming unit 3 and cage walls forming unit 4 use guide rail 6 to be connected with ground, or winding station unit 2 uses guide rail 6 to be connected with ground.
The structure of described Wound Dies 202 is: include central shaft 221, surrounds the left receipts plate 223 of columnar main body, right receipts plate 222 and lower receipts plate 224；The lower inner wall of left receipts plate 223 and right receipts plate 222 is connected with central shaft 221 by several rotation cylinder 225, and rotation cylinder 225 lower end is hinged with left receipts plate 223 or right receipts plate 222 inwall, and upper end is hinged with central shaft 221；The upper inside wall of left receipts plate 223 and right receipts plate 222 is installed with bending plate 228 respectively, two bending plates 228 are the most hinged, and be connected with central shaft 221 commonly through gripper shoe 227, gripper shoe 227 top is hinged with two bending plates 228, and gripper shoe 227 is connected with central shaft 221 below；Lower receipts plate 224 is connected with central shaft 221 by vertical cylinder 226, and vertical cylinder 226 upper end is connected with central shaft 221, and lower end is connected with lower receipts plate 224.
Use this equipment to prepare the technique of heavy caliber pipe, comprise the following steps:
(1) use bell and spigot injection molding unit 1 injection mo(u)lding to prepare bellmouth and socket, and bellmouth and socket are installed on the Wound Dies 202 being wound around station unit 2；
(2) use preheating apparatus 204 that the top of the Wound Dies 202 that first is wound around on station unit 2 is positioned at bellmouth or spigot preheats, after reaching predetermined temperature, inwall extruder 301 extrusion is used to prepare pipe material inner wall, and bonding with bellmouth or socket；Before tubing completes inwall winding, start preheating apparatus 204 and the Wound Dies 202 of socket or socket is preheated, and guarantee that, when inwall extruder 301 reaches at this, Wound Dies 202 temperature reaches production requirement；Inwall extruder 301 extrusion molding completes inwall and socket or the bonding of bellmouth；And start second preheating apparatus 204 being wound around on station unit 2 before this is done, preheat in bellmouth or spigot on the top of this Wound Dies 202, and according to above-mentioned steps, second is wound around the combination of station unit 2 and other pipe material inner wall windings being wound around station unit 2 and inwall and bell and spigot；Preheating apparatus 204 is 120-160 DEG C to the heating-up temperature of preheating apparatus 204
(3), after the cooling of the tubing on station unit 2 to be wound, use the cage walls extruder 401 of cage walls forming unit 4 that it is carried out the Wrapping formed of cage walls；Initially with preheating apparatus 204, the inwall of tubing is heated, then cage walls extruder 401 is used it to be extruded Wrapping formed, before Wrapping formed completing, start preheating apparatus 204 pipe material inner wall on which on next one winding station unit 2 and preheat；
(4) the winding station unit 2 after being wound around by cage walls is transferred to amending unit and is modified and the demoulding.
Claims (5)
1. the production equipment of a heavy caliber structure-wall pipe material, it is characterized in that, this equipment includes bell and spigot injection molding unit (1), some groups of windings station unit (2), inwall forming unit (3), cage walls forming units (4) and trimming unit (5), inwall forming unit (3) and cage walls forming unit (4) have and are wound around the relative position that station unit (2) can adjust；
It is wound around station unit (2) and includes pedestal (201) and the Wound Dies (202) being placed on pedestal (201), pedestal (201) is provided with rolling mechanism (203) and preheating apparatus (204), and preheating apparatus (204) uses be connected adjustable relative to the position of mould with pedestal (201)；
Inwall forming unit (3) includes inwall extruder (301), inwall extrusion die (302) and inwall heater (303)；
Cage walls forming unit (4) includes cage walls extruder (401), cage walls mould (402) and cage walls heater (403).
The production equipment of a kind of heavy caliber structure-wall pipe material the most according to claim 1, it is characterized in that, inwall forming unit (3) and cage walls forming unit (4) use guide rail (6) to be connected with ground, or winding station unit (2) uses guide rail (6) to be connected with ground.
The production equipment of a kind of heavy caliber structure-wall pipe material the most according to claim 1, it is characterised in that the structure of described Wound Dies (202) is:
Including central shaft (221), surround left receipts plate (223), right receipts plate (222) and the lower receipts plate (224) of columnar main body；
The lower inner wall of left receipts plate (223) and right receipts plate (222) is connected with central shaft (221) by several rotation cylinder (225), and rotation cylinder (225) lower end is hinged with left receipts plate (223) or right receipts plate (222) inwall, upper end is hinged with central shaft (221)；
The upper inside wall of left receipts plate (223) and right receipts plate (222) is installed with bending plate (228) respectively, two bending plates (228) are the most hinged, and be connected with central shaft (221) commonly through gripper shoe (227), gripper shoe (227) top is hinged with two bending plates (228), and gripper shoe (227) is connected with central shaft (221) below；
Lower receipts plate (224) is connected with central shaft (221) by vertical cylinder (226), and vertical cylinder (226) upper end is connected with central shaft (221), and lower end is connected with lower receipts plate (224).
4. use the technique that the production equipment of a kind of heavy caliber structure-wall pipe material described in any of the above-described claim prepares heavy caliber pipe, it is characterised in that comprise the following steps:
(1) use bell and spigot injection molding unit (1) injection mo(u)lding to prepare bellmouth and socket, and bellmouth and socket are installed on the Wound Dies (202) being wound around station unit (2)；
(2) use preheating apparatus (204) that the top of the Wound Dies (202) that first is wound around on station unit (2) is positioned at bellmouth or spigot preheats, after reaching predetermined temperature, inwall extruder (301) extrusion is used to prepare pipe material inner wall, and bonding with bellmouth or socket；Before tubing completes inwall winding, start preheating apparatus (204) and the Wound Dies (202) of socket or socket is preheated, and guarantee that, when inwall extruder (301) reaches at this, Wound Dies (202) temperature reaches production requirement；Inwall extruder (301) extrusion molding completes inwall and socket or the bonding of bellmouth；And start second preheating apparatus (204) being wound around on station unit (2) before this is done, preheat in bellmouth or spigot on the top of this Wound Dies (202), and according to above-mentioned steps, second is wound around the combination of station unit (2) and other pipe material inner wall windings being wound around station unit (2) and inwall and bell and spigot；
(3), after the cooling of the tubing on station unit (2) to be wound, use the cage walls extruder (401) of cage walls forming unit (4) that it is carried out the Wrapping formed of cage walls；Initially with preheating apparatus (204), the inwall of tubing is heated, then cage walls extruder (401) is used it to be extruded Wrapping formed, before Wrapping formed completing, start upper preheating apparatus (204) pipe material inner wall on which of next one winding station unit (2) and preheat；
(4) winding station unit (2) after being wound around by cage walls is transferred to amending unit and is modified and the demoulding.
The technique preparing heavy caliber pipe the most according to claim 4, it is characterised in that step (2) preheating apparatus (204) is 120-160 DEG C to the heating-up temperature of preheating apparatus (204).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481391.2A CN106003749B (en) | 2016-06-23 | 2016-06-23 | A kind of production equipment of heavy caliber structure-wall pipe material and the technique for preparing tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481391.2A CN106003749B (en) | 2016-06-23 | 2016-06-23 | A kind of production equipment of heavy caliber structure-wall pipe material and the technique for preparing tubing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106003749A true CN106003749A (en) | 2016-10-12 |
| CN106003749B CN106003749B (en) | 2019-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610481391.2A Active CN106003749B (en) | 2016-06-23 | 2016-06-23 | A kind of production equipment of heavy caliber structure-wall pipe material and the technique for preparing tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106003749B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077613A (en) * | 2007-06-25 | 2007-11-28 | 李富春 | Method for producing steel mesh reinforced plastic composite pipes and its self-contained equipment |
| CN104786514A (en) * | 2015-03-13 | 2015-07-22 | 浙江双林机械股份有限公司 | Continuous fiber reinforced tube processing apparatus and processing method thereof |
| CN205202226U (en) * | 2015-11-18 | 2016-05-04 | 郁世超 | Winding pipe multistation extrusion system |
| CN205889911U (en) * | 2016-06-23 | 2017-01-18 | 郁世超 | Production facility of heavy -calibre structure wall tubular product |
-
2016
- 2016-06-23 CN CN201610481391.2A patent/CN106003749B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101077613A (en) * | 2007-06-25 | 2007-11-28 | 李富春 | Method for producing steel mesh reinforced plastic composite pipes and its self-contained equipment |
| CN104786514A (en) * | 2015-03-13 | 2015-07-22 | 浙江双林机械股份有限公司 | Continuous fiber reinforced tube processing apparatus and processing method thereof |
| CN205202226U (en) * | 2015-11-18 | 2016-05-04 | 郁世超 | Winding pipe multistation extrusion system |
| CN205889911U (en) * | 2016-06-23 | 2017-01-18 | 郁世超 | Production facility of heavy -calibre structure wall tubular product |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106003749B (en) | 2019-03-26 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20190201 Address after: 311251 Tu Pu Dai village and Mu Ting Xu village, Lin Pu town, Xiaoshan District, Hangzhou, Zhejiang Applicant after: HONGSHENG PLASTICS (HANGZHOU) CO.,LTD. Address before: 311251 Japan's 1 Industrial Park, Xiaoshan, Hangzhou, Zhejiang Applicant before: Yu Shichao Applicant before: Zhou Maozhen |
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| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A production equipment and process for preparing large-diameter structural wall pipes Effective date of registration: 20231108 Granted publication date: 20190326 Pledgee: Zhejiang Xiaoshan rural commercial bank Limited by Share Ltd. Lin Pu branch Pledgor: HONGSHENG PLASTICS (HANGZHOU) CO.,LTD. Registration number: Y2023980064552 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |