CN202583530U - Secondary pipe recognition type ripple multi-cavity optical cable pipe and devices for manufacturing same - Google Patents
Secondary pipe recognition type ripple multi-cavity optical cable pipe and devices for manufacturing same Download PDFInfo
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- CN202583530U CN202583530U CN 201120541058 CN201120541058U CN202583530U CN 202583530 U CN202583530 U CN 202583530U CN 201120541058 CN201120541058 CN 201120541058 CN 201120541058 U CN201120541058 U CN 201120541058U CN 202583530 U CN202583530 U CN 202583530U
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Abstract
The utility model relates to a secondary pipe recognition type ripple multi-cavity optical cable pipe and devices for manufacturing the same. Two kinds of ripple multi-cavity optical cable pipes in which secondary pipes are easy to recognize are included, and corresponding forming methods and composite devices are also included. One kind of the ripple multi-cavity optical cable pipe is that secondary pipe bundles which are provided with silica layers and are different in color are arranged in a flexible ripple primary pipe, and the other kind of the ripple multi-cavity optical cable pipe is that secondary pipe bundles which are provided with different identities and are same in color are arranged in a flexible ripple primary pipe. The former is colorful and has an obvious functional structure, and the latter is short in process route, compact in structure, high in efficiency, and can be used for an on-site construction vehicle.
Description
Technical field
The utility model relates to a kind of cable jacket conduit, particularly the equipment of son pipe identification type ripple multi-cavity optical cable conduit and making usefulness thereof.
Background technology
The optical cable construction is national important strategic construction, belongs to high-tech area, and its input is huge, and technical requirement is very high.Optical cable need be protected by protecting pipe.Use PVC (PVC) or tygon (PE) not enough as this sleeve pipe poling difficulty of protecting pipe (comprising plum blossom pipe, nine lumens), cabling unrest, constructional difficulties, the ring stiffness of raw material production the earliest, it is low to bear load pressure, fragile.Though the silicon core pipe that middle nineteen nineties comes out has advantages such as flexibility is good, length big, inwall friction force is low, owing to be designed to single tube, makes it when the scale combination construction, a series of problems such as existence misplaces easily, kink, protectiveness difference.
Ripple multi-cavity optical cable conduit is on the basis of the pros and cons of summing up various in the past optical cables, cable duct tube, the high-performance optical cable protecting pipe of new generation that develops with new idea.Its characteristic is at some optical cable conduits (son pipe) the spiral helicine single-wall corrugated pipes of the compound last layer in outside (female pipe), optical cable is in respectively under the two-layer protective sleeve, and keeps flexible.
The applicant once had relevant ripple multi-cavity optical cable, micro cable guide pipe (COD, CMOD) tubing; A plurality of patented technologies of manufacturing and process equipment aspect; Like ZL01232652.6, ZL02244135.2, ZL20032010251.2,201120077940.2, these patented technologies help the quality of cable product, efficient to improve.But ripple multi-cavity optical cable conduit still has certain inconvenience when long distance construction blows the cable unwrapping wire, and reason is that each son pipe identity homochromy in mother pipe is poor, being prone to the dislocation error.Therefore, the identity of ripple multi-cavity optical cable conduit neutron tube is one of problem demanding prompt solution in the industry.
Summary of the invention
The purpose of the utility model provides a seed pipe identification type ripple multi-cavity optical cable conduit and makes the equipment of usefulness, and to solve when laying ripple multi-cavity optical cable conduit, the child pipe in the optical cable conduit is difficult for the problem of identification.
The purpose of the utility model realizes by following technical scheme.
The utility model pipe identification type ripple multi-cavity optical cable conduit comprises the son tube bank that is made up of experimental process pipe 5 within it of female pipe of flexible ripple and dress, and it is characterized in that: described experimental process tube bank constitutes by the child pipe 5A that has silicon layer.Be that its characteristic A is compounded with by band silicon layer of different colours in the female pipe 11 of flexible ripple to manage the son tube bank that 5A constitutes; Or
Characteristic B is the son tube bank that does not constitute with the child pipe 5 of silicon layer pipe 5A that is compounded with in the female pipe 11 of flexible ripple by different identification.
Adopt above-mentioned product, just can solve multi-cavity ripple optical cable conduit is difficult for identification when laying problem with color identification or sign identification.
Make the equipment that characteristic A multi-cavity optical cable conduit is used; It is characterized in that: comprise that many cover color sub pipes are extruded unit and son is restrained guides 6; And female extruder 7, composite machine head 9 of managing; Every cover color sub pipe is extruded unit and is comprised color sub pipe extruder 1A, son pipe co-extruding machine head 3A, the vacuum sizing device 4A that is arranged in order; With child pipe silicon layer extruder 2A, son pipe silicon layer extruder is loaded on the outlet position of son pipe co-extruding machine head with the angle that tilts in its exit, the outlet of each vacuum sizing device through the child pipe 5A that sees off all be contained in composite machine head on an optical cable guide hole 6.1 communications and liaison mutually of tube bank guides.
Make the equipment that characteristic B multi-cavity optical cable conduit is used; It is characterized in that: comprise the son tube bank coextrusion machine 1, multi-cavity tube bank head 3, the vacuum sizing device 4 that are arranged in order; With child pipe sign extruder 2, son tube bank guides 6, female pipe extruder 7, composite machine head 9; Son pipe sign extruder is loaded on multi-cavity tube bank head outlet position in its exit with the angle that tilts, each son pipe that the outlet of multi-cavity tube bank head is seen off through vacuum sizing device be contained in composite machine head on each corresponding optical cable guide hole 6.1 communications and liaison mutually of tube bank guides.
Described sub-pipe sign extruder 2 is loaded on the sub concrete structure of restraining head 3 outlet positions of multi-cavity in its exit with the angle that tilts and is: multi-cavity tube bank head 3 comprises head plug 3.3, head shell 3.4, inserts 3.5; Be equipped with at the outlet position of head shell and insert; Each axial hole 3.7 that some head plugs are arranged in head shell, insert, the entrance point of each axial hole communicates with the outlet of tube bank coextrusion machine; With the composition surface of the head shell that engages inserted on, have sign annular groove 3.1 and with sign annular groove, the variant sign cast gate 3.2 that communicates, each other end that identifies cast gate all communicates with each axial hole; Son pipe sign extruder is loaded on the inserting of multi-cavity tube bank head outlet position with 45 ° the angle of tilting in its exit; Inserting to have connects runner 3.8, connects the runner entrance point and communicates with the outlet of the sign material runner 2.2 of son pipe sign extruder, and connection runner exit end communicates with sign annular groove 3.1 on the head shell.
Composite machine head 9 is T-shaped, and it vertically links to each other with the outlet that mother manages extruder 7 to an end, and each links to each other its horizontal two ends with the outlet of son tube bank guides 6 and the inlet of rotation vacuum forming device 10.
Composite machine head 9 comprises static mixer 8; The inlet of static mixer is connected on the outlet of female pipe extruder; The bull leakage current mechanism of the outlet of static mixer and composite machine head interlinks, and bull leakage current mechanism comprises movement 9.2, and an end of movement interlinks with the tube bank guides; The other end joins with rotation vacuum forming device 10; Have axially extending bore on the movement, have the link slot 9.3 that the outlet with static mixer interlinks on the outside surface of movement, link slot leads to outlet through helicla flute 9.4 and interlinks with rotation vacuum forming device 10.
Said rotation vacuum forming device 10 comprises the rotary sleeve 10.1 that is positioned at vacuum tank, in rotary sleeve, has the path 10 .2 of band spiral, and the internal diameter 10.3 of the passage of this band spiral adapts to the external diameter of son tube bank, has the aperture 10.4 that is evenly distributed on the rotary sleeve.
Color sub pipe extruder 1A and son pipe silicon layer extruder 2A are contained on the son pipe coextrusion head 3 jointly.The course of work is; At first be that many cover color sub pipe extruder 1A pipe 5A of extruding many different colours (outerly is high density polyethylene; Internal layer is rib chamber silicon layer or optical cavity silicon layer), cross son tube bank guides 6 and import the composite machine head 9 that is contained on female pipe extruder 7, the static mixer 8 and see off.The child pipe 5A of different colours penetrates in the corresponding pilot hole of tube bank guides 6, and the child pipe of variant color is directed to and is arranged in the son tube bank and passes movement; Manage link slot 9.3 and helicla flute 9.4 that runner static mixer 8 that material that extruder 7 extrude through distribute mix get into movements 9.2 by mother this moment; Deliver in the rotation vacuum plant 10 through outlet; Form outer tube (female pipe 11A), be coated on the outside of each son pipe 5A, constituted ripple photoconductive tube 11.
All relate to that pipe extruder is that the applicant has in this complex technique patent No. ZL002359693 disclosed having, squeezed pipe four key elements: forced conveyance machine barrel, dispersing and mixing screw rod, distribute and mix the pipe extruder of runner, weldless trace former, with intensity and the quality that guarantees this product.Said take-up mechanism is that the applicant has patented technology ZL02244135.2 and leads seizing mechanism and spooler two parts said comprising.
Different with the A scheme is that each pipe of B scheme is not to be extruded by some coextrusion units, but restrains the coextrusion machine with one group bigger son, extrudes the child pipe of some band different identifications simultaneously through a multi-cavity tube bank head.Method is to adopt the son tube bank coextrusion machine of a multi-cavity mold; Material is extruded some root pipes uniformly in the head of extruder; On the die joint of the housing of head; Sign annular groove one end in the periphery of child pipe links with the sign extruder, and the sign annular groove other end also communicates through the periphery that the difform cast gate of each bar and each son are managed.Like this, each son pipe through here the time, the compound last different tag line of all being extruded on the outer wall of each root pipe 5 of material by sign extruder 2.The son pipe gets into the composite machine head on female pipe extruder through the vacuum cooled typing through guides then, in the rotation calibrator, is combined into ripple multi-lumen tube 11 with mother's pipe.Other processes are all identical with the A scheme.
In sum, the 2 kinds of products and the production program thereof of the utility model can solve when pipeline installation, and the identity of each the son pipe in female pipe is poor, are prone to the problem of dislocation error.The product color code of option A is distinct, very easily difference, and functional structure is outstanding; The option b product feature also is to be easy to difference, and the manufacture craft route shortens, compact conformation, and efficient is higher, is more suitable for laying with the site operation car.
Description of drawings
Fig. 1 is for being compounded with the structural drawing of plurality of sub pipe in the existing flexible corrugated tube.
Fig. 2 is the A-A cut-open view among Fig. 1.
Fig. 3 is the structure enlarged drawing of the child pipe 5A of improved band different colours among Fig. 2.
Fig. 4 is the structure enlarged drawing of the child pipe 5 of improved band unlike signal among Fig. 2.
The equipment synoptic diagram that Fig. 5 uses for the product that has characteristic A with the making of A scheme.
The equipment synoptic diagram that Fig. 6 uses for the product that has characteristic B with the making of B scheme.
Fig. 7 is the structural scheme of mechanism of the tube bank guides 6 among Fig. 5, Fig. 6, female pipe extruder 7, static mixer 8, composite machine head 9, rotation vacuum sizing device 10.
Fig. 8 is the connection synoptic diagram of Fig. 6 neutron tube bank coextrusion machine 1, son pipe sign extruder 2, multi-cavity tube bank head 3.
Fig. 9 is the B-B sectional view among Fig. 8.
Code name among the figure:
1A. color sub pipe extruder, 2A. pipe silicon layer extruder, 3A. manages co-extruding machine head, the 4A. vacuum sizing device, the child pipe of 5A. different colours,
1. son is restrained the coextrusion machine; 2. the son pipe identifies extruder; 3. multi-cavity is restrained head, 3.1 sign annular grooves, and 3.2 sign cast gates, 3.3 head plugs, 3.4 head shells, 3.5 insert; 3.6 son pipe material runner, 3.7 axial holes, 3.8 runners, 4. vacuum sizing device, 5. the child pipe of different identification, 6. son tube bank guides; 7. female pipe extruder, 8. static mixer, 9. composite machine head, 9.2 movements, 9.3 link slots, 9.4 helicla flutes; 10. rotation vacuum sizing device, 10.1 rotary sleeves, the passage of 10.2 band spin slots, 10.3 passage internal diameters, 10.4 apertures; 11. ripple photoconductive tube; The female pipe of 11A, 12. typing tanks, 13. draw-gears, 14. niprolls, 15. cutting machines, 16 guide reels; 17 lead seizing mechanism, 18 winding rollers, 19 spoolers.
Embodiment
The structure enlarged diagram of the child pipe 5A of the band different colours of Fig. 3 in being, among the figure left side be band light wall silicon layer pipe, structure is with light wall silicon internal layer 5A.2 in outer 5A.1; Managing for band rib wall silicon layer of right side, structure is with rib wall silicon internal layer 5A.3 in outer 5A.1.
The structure enlarged diagram of the child pipe 5 that Fig. 4 does not identify for zone, the left side be that light wall is managed among the figure, the right side be that rib wall is managed.Outside surface at each pipe all has distinctive mark 5.1.
Above-mentioned child pipe section only illustrates relevant skin, down together.
Like Fig. 5; The used equipment of multi-cavity optical cable conduit that making has characteristic A comprises that many cover color sub pipes are extruded unit and son is restrained guides 6, female pipe extruder 7, composite machine head 9; Every cover color sub pipe is extruded unit and is comprised color sub pipe extruder 1A, son pipe silicon layer extruder 2A, son pipe co-extruding machine head 3A and vacuum sizing device 4A; Son pipe silicon layer extruder 2A, son pipe co-extruding machine head 3A and vacuum sizing device 4A are housed on every color sub pipe extruder 1A; Son pipe silicon layer extruder 2A is loaded on the outlet position of color sub pipe extruder 1A with the angle that tilts in its exit, the outlet of each color sub pipe extruder 1A through the child pipe 5A that sees off all with restrain guides 6 on a corresponding optical cable guide hole 6.1 communications and liaison mutually; Son tube bank guides 6 is contained on the composite machine head 9.
During work; Color sub pipe extruder 1A and son pipe silicon layer extruder 2A are contained on the son pipe coextrusion head 3 jointly; At first be the child pipe 5A that 5 cover color sub pipe extruder 1A extrude many different colours; It is outer for high density polyethylene (HDPE) internal layer is rib chamber silicon layer or optical cavity silicon layer, imports the composite machine head 9 that is contained on female pipe extruder 7, the static mixer 8 through son tube bank guides 6 and sees off.Like Fig. 7, the child pipe 5A of five different colours penetrates in the corresponding pilot hole of tube bank guides 6, and each son pipe 5A is directed to and is arranged in the son tube bank and passes movement 9.2.In addition; Managing the runner static mixer 8 that material that extruder 7 extrudes mixes through distributing by mother gets in the link slot 9.3 and helicla flute 9.4 of movements 9.2; Processed rotary sleeve 10.1 through exporting to deliver in the rotation vacuum plant 10; See off from the path 10 .2 of band spin slot, be coated on the outside of each son pipe 5A as outer tube (female pipe 11A) embryo.When the path 10 .2 of process band spiral,, as shown in Figure 1 by the ripple photoconductive tube 11 of the single wall of Vacuum shaping curl.This multi-cavity ripple optical cable conduit 11 is made up of son tube bank and the female pipe of the ripple 11A that different colours pipe 5A constitutes, and the number of son pipe 5A can be confirmed (with reference to Fig. 2) as required with arranging.The vacuum sizing device 10 that is rotated then is sent to cooling and shaping water tank 12, through draw-gear 13, niproll 14, cutting machine 15, guide reel 16, lead through mechanism 17, spooler 19 rolling packing on winding roller 18.
Embodiment 2. adopts the B scheme.Son pipe 5 is like Fig. 1,2,4, and Fig. 4 manages 5 synoptic diagram with the son of the different identification of ribbon identification, and the left side is the light wall pipe of different identification among the figure, and the right side is the rib wall pipe of different identification, on the outside surface of the two, all has the sign 5.1 with the colour band difference.Make equipment such as Fig. 6, shown in Figure 7 of usefulness.Fig. 6 is a synoptic diagram of making the equipment of the multi-cavity optical cable conduit with characteristic B; Equipment comprises son tube bank coextrusion machine 1, multi-cavity tube bank head 3, vacuum sizing device 4 and the son pipe sign extruder 2 that is arranged in order; Son tube bank guides 6; And female extruder 7, composite machine head 9 of managing; Son pipe sign extruder 2 is loaded on multi-cavity tube bank head 3 outlet positions in its exit with the angle that tilts, each son pipe 5 that the outlet of multi-cavity tube bank head 3 is seen off through vacuum sizing device 4 be contained in composite machine head 9 on each corresponding optical cable guide hole 6.1 communications and liaison mutually of tube bank guides 6.
Above-mentioned child pipe sign extruder 2 is loaded on multi-cavity tube bank head 3 outlet positions in its exit with the angle that tilts; Concrete structure such as Fig. 8; Multi-cavity tube bank head 3 comprises head plug 3.3, head shell 3.4, inserts 3.5; Be equipped with at the outlet position of head shell 3.4 and insert 3.5, some head plugs 3.3 are arranged in head shell 3.4,3.5 each axial hole 3.7 of inserting, and the entrance point of each axial hole 3.7 communicates through the outlet of child pipe material runner 3.6 with tube bank coextrusion machine 1; Like Fig. 9 is the B-B sectional view of Fig. 8, show with the composition surface of 3.5 head shells 3.4 that engage of inserting on, have sign annular groove 3.1 and communicate with it respectively identify cast gate 3.2, each other end that identifies cast gate 3.2 all communicates with each axial hole 3.7; Son pipe sign extruder 2 is loaded on inserting on 3.5 of multi-cavity tube bank head 3 outlet positions with 45 ° the angle of tilting in its exit; Insert and 3.5 have runner 3.8; These runner 3.8 entrance points communicate with the outlet of the sign material runner 2.2 of son pipe sign extruder 2, and endpiece communicates with sign annular groove 3.1 on the head shell 3.4.
What this programme was different with the A scheme is: what the son pipe was extruded the operation employing is the son tube bank coextrusion machine 1 in a mould 5 chambeies, and multi-cavity tube bank head 3 has 5 axial holes 3.7, and each axial hole 3.7 is all managed material runner 3.6 through son and is communicated with extruder 1 runner 1.1.Therefore, extruder 1 once can be extruded 5 root pipes 5.When the material of extruding from extruder 1 through sprue 1.1, each son pipe material runner 3.6, again when each axial hole 3.7 flows out, the sign of extruding from child pipe sign extruder 2, identifies cast gate 3.2 and flows out simultaneously through sign annular groove 3.1 with material.Like this, each son pipe 5 is through inserting 3.5 o'clock, on the outer wall of each root pipe 5 all by the compound last different tag line of seeing off from sign cast gate 3.2 5.1 of material (Fig. 4).Then, each son pipe 5 cooling and shaping through vacuum cooling unit 4 gets into the composite machine head 9 on female pipe extruder 7 through bundle of pipe guides 6 again, manages 11A with mother and in rotation calibrator 10, is combined into ripple multi-lumen tube 11.Other processes are all identical with the A scheme.
Claims (7)
1. son pipe identification type ripple multi-cavity optical cable conduit comprises the son tube bank that is made up of the experimental process pipe within it of female pipe of flexible ripple and dress, and it is characterized in that: described experimental process tube bank constitutes by the child pipe (5A) that has silicon layer.
2. make the equipment that multi-cavity optical cable conduit as claimed in claim 1 is used; It is characterized in that: comprise that many cover color sub pipes are extruded unit and son is restrained guides (6); And female extruder (7), composite machine head (9) of managing; Every cover color sub pipe is extruded unit and is comprised color sub pipe extruder (1A), son pipe co-extruding machine head (3A), the vacuum sizing device (4A) that is arranged in order; With child pipe silicon layer extruder (2A), son pipe silicon layer extruder is loaded on the outlet position of son pipe co-extruding machine head with the angle that tilts in its exit, the outlet of each vacuum sizing device through the child pipe (5A) seen off all be contained in composite machine head on an optical cable guide hole (6.1) communications and liaison mutually of tube bank guides.
3. make the equipment that multi-cavity optical cable conduit as claimed in claim 1 is used; It is characterized in that: comprise the son tube bank coextrusion machine (1), multi-cavity tube bank head (3), the vacuum sizing device (4) that are arranged in order; With child pipe sign extruder (2), son tube bank guides (6), female pipe extruder (7), composite machine head (9); Son pipe sign extruder is loaded on multi-cavity tube bank head outlet position in its exit with the angle that tilts, each son pipe that the outlet of multi-cavity tube bank head is seen off through vacuum sizing device be contained in composite machine head on each corresponding optical cable guide hole (6.1) communications and liaison mutually of tube bank guides.
4. equipment according to claim 3; It is characterized in that: described sub-pipe sign extruder (2) is loaded on the sub concrete structure of restraining head (3) outlet position of multi-cavity in its exit with the angle that tilts and is: multi-cavity tube bank head (3) comprises head plug (3.3), head shell (3.4), insert (3.5); Be equipped with at the outlet position of head shell and insert; Each axial hole (3.7) that some head plugs are arranged in head shell, insert, the entrance point of each axial hole communicates with the outlet of tube bank coextrusion machine; With the composition surface of the head shell that engages inserted on, have sign annular groove (3.1) and with sign annular groove, the variant sign cast gate (3.2) that communicates, each other end that identifies cast gate all communicates with each axial hole; Son pipe sign extruder is loaded on the inserting of multi-cavity tube bank head outlet position with 45 ° the angle of tilting in its exit; Inserting has connection runner (3.8), connects the runner entrance point and communicates with the outlet of the sign material runner (2.2) of son pipe sign extruder, and connection runner exit end communicates with sign annular groove (3.1) on the head shell.
5. according to claim 2 or 3 described equipment; It is characterized in that: composite machine head (9) is T-shaped; It vertically links to each other to the outlet of an end with female pipe extruder (7), and each links to each other its horizontal two ends with the outlet of son tube bank guides (6) and the inlet of rotation vacuum forming device (10).
6. according to claim 2 or 3 described equipment; It is characterized in that: composite machine head (9) comprises static mixer (8), and the inlet of static mixer is connected on the outlet of female pipe extruder, and the bull leakage current mechanism of the outlet of static mixer and composite machine head interlinks; Bull leakage current mechanism comprises movement (9.2); One end of movement interlinks with the tube bank guides, and the other end joins with rotation vacuum forming device (10), has axially extending bore on the movement; Have the link slot (9.3) that the outlet with static mixer interlinks on the outside surface of movement, link slot leads to outlet through helicla flute (9.4) and interlinks with rotation vacuum forming device (10).
7. equipment according to claim 6; It is characterized in that: said rotation vacuum forming device (10) comprises the rotary sleeve (10.1) that is positioned at vacuum tank; The passage (10.2) that in rotary sleeve, has the band spiral; The internal diameter of the passage of this band spiral (10.3) adapts to the external diameter of son tube bank, has the aperture (10.4) that is evenly distributed on the rotary sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120541058 CN202583530U (en) | 2011-12-22 | 2011-12-22 | Secondary pipe recognition type ripple multi-cavity optical cable pipe and devices for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120541058 CN202583530U (en) | 2011-12-22 | 2011-12-22 | Secondary pipe recognition type ripple multi-cavity optical cable pipe and devices for manufacturing same |
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| Publication Number | Publication Date |
|---|---|
| CN202583530U true CN202583530U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120541058 Expired - Fee Related CN202583530U (en) | 2011-12-22 | 2011-12-22 | Secondary pipe recognition type ripple multi-cavity optical cable pipe and devices for manufacturing same |
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| CN (1) | CN202583530U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142497A (en) * | 2015-05-18 | 2016-11-23 | 上海上塑控股（集团）有限公司 | Steady state pipe making apparatus |
| WO2018112984A1 (en) * | 2016-12-24 | 2018-06-28 | 付建志 | Plastic hollow pipe guiding device |
| CN112549485A (en) * | 2020-11-18 | 2021-03-26 | 山东东岳高分子材料有限公司 | Polytetrafluoroethylene multi-cavity extrusion pipe and processing method thereof |
-
2011
- 2011-12-22 CN CN 201120541058 patent/CN202583530U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142497A (en) * | 2015-05-18 | 2016-11-23 | 上海上塑控股（集团）有限公司 | Steady state pipe making apparatus |
| WO2018112984A1 (en) * | 2016-12-24 | 2018-06-28 | 付建志 | Plastic hollow pipe guiding device |
| CN112549485A (en) * | 2020-11-18 | 2021-03-26 | 山东东岳高分子材料有限公司 | Polytetrafluoroethylene multi-cavity extrusion pipe and processing method thereof |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20141222 |
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| EXPY | Termination of patent right or utility model |