CN1403268A - Spiral hollow-wall pipe with two flat walls and its once extruding production line - Google Patents
Spiral hollow-wall pipe with two flat walls and its once extruding production line Download PDFInfo
- Publication number
- CN1403268A CN1403268A CN02135724A CN02135724A CN1403268A CN 1403268 A CN1403268 A CN 1403268A CN 02135724 A CN02135724 A CN 02135724A CN 02135724 A CN02135724 A CN 02135724A CN 1403268 A CN1403268 A CN 1403268A
- Authority
- CN
- China
- Prior art keywords
- head
- flat walls
- pipe
- hollow structure
- hollow
- 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
Images
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to plastic tube extruding technology. The pipe with hollow wall consists of inner wall layer, outer wall layer and inner holes, and its inner holes are circular or polygonal holes distributed homogeneously around the circumference. It may be produced with hard polyvinyl chloride, polypropylene, polyethylene and other plastic and through extrusion. The extruding head consists of neck, head body with mandril driving mechanism, mouth mold, shunt support, shunt cone, mandril, etc., and the mandril is followed with several hollow mandrels. The present invention provides one pipe with excellent comprehensive mechanical and technological performance and capable of being produced in standard extruding production line and its producing head.
Description
Technical field
The invention belongs to plastic tube extruding technology field, more particularly relate to two flat walls spiral hollow structure wall pipe and once extruding production line thereof.
Background technology
The existing large-bore plastics pipeline that is used for sewer or rainwater is underground pipe.Because of needs bear external pressure, tubing need be designed to improve the structured wall popes of ring stiffness.International and domestic existing structured wall popes is double-wall corrugated pipe, UPVC grilled tube, the axial hollow grid pipe of extrusion molding once; The large diameter wound pipe of secondary extrusion molding and the winding pipe of other mode are arranged.Best-selling on the market now is double-wall corrugated pipe and manufacturing equipment thereof.Economize because of press double-wall corrugated pipe materials when the same ring stiffness, but the manufacturing equipment of this product costs an arm and a leg, be unfavorable for the large tracts of land popularization.Secondary is extruded the large diameter wound pipe of winding shaping, because equipment price is low, the user is acceptant.But winding pipe weight than double-wall corrugated pipe when same ring stiffness increases more than 1/4th.
As mentioned above, existing structured wall popes respectively has its advantage, but also its weak point is arranged respectively.The structured wall popes that has has good ring stiffness and axial pliability, but mostly produces with the winding method, and technology is complicated.The axial dead zone of the structured wall popes that has (axially porous) structure has improved its axial stiffness, can on the extruding production line of standard, produce, and good manufacturability, but its axial pliability and ring stiffness descend to some extent.Radially dead zone (radially porous) structure of the structured wall popes that also has has improved its ring stiffness and axial pliability, but its shock resistance slightly descends, and will produce with the winding method, and technology is complicated.
Purpose of the present invention just is to overcome above-mentioned shortcoming and defect, and a kind of novel two flat walls spiral hollow structure wall pipe and once extruding production line thereof once extruded is provided.The existing good impact resistance of structured wall popes of producing with this production line, ring stiffness, axial comprehensive mechanical performance such as pliability have superior processing performance again, can on the extruding production line of standard, produce, and the production efficiency height, and also in light weight, production cost is low.Under the situation of same ring stiffness, two flat walls spiral hollow structure wall pipe of the present invention is not only light than double-wall corrugated pipe, and its equipment price only is the double-wall corrugated pipe production equipment half, extensively large scale application.
Summary of the invention
In order to achieve the above object, the present invention is made of the inwall of smooth interior surfaces, the outer wall of outer surface smoother and the endoporus between inner and outer wall.Hole wall between the endoporus constitutes the muscle between the inner and outer wall.Endoporus is the threaded hole that runs through head and the tail.The helical angle of threaded hole can be adjusted according to the requirement of ring stiffness.
Threaded hole has a plurality of, laterally is uniformly distributed along the circumference.This structure has improved the ring stiffness of two flat walls pipe greatly, and is particularly important for bigbore blow-off pipe, row's rainwater pipe.Because blow-off pipe, row's rainwater Guan Jun use with burying, caliber as the ring stiffness deficiency, is difficult to bear weight after increasing.This structure has also comprehensively improved its vertical rigidity and pliability, makes its existing good vertical rigidity, and good vertical anti-bending strength is arranged again.Otherwise be difficult to adapt to the working condition of burying ground.Smooth interior surface is convenient to reduce the flow resistance of sewage or rainwater, and the smooth exterior surface face then is convenient to carrying.
Threaded hole can be a kind of in circular hole, elliptical aperture, endless belt shape hole, rectangular opening, the polygonal hole.The number of threaded hole and hole shape can be decided according to the bore of pipe, wall thickness, purposes etc., should help the raising of its comprehensive mechanical performance, weight reduction as far as possible again, reduce cost.
The bight rounding of square hole, endless belt shape hole, rectangular opening, polygonal hole is to improve its manufacturability.
Two flat walls pipe of the present invention can be extruded by a kind of and other plastics of PVC-U (PVC-U), polypropylene (PP), polyethylene plastics such as (PE) and form.By the pipe function admirable that PVC-U (PVC-U), polypropylene (PP), polyethylene (PE) etc. are made, anticorrosive, ageing-resistant, can be widely used in the buried pollution discharge row rainwater.
The available plastics expressing technique of two flat walls pipe of the present invention is produced.Its manufacturability is fine, can produce on common standard even nonstandard extruder, extruding production line.Therefore, easy to utilize.For this reason, the present invention has designed special-purpose head.
The once extruding production line of two flat walls spiral hollow structure wall pipe of the present invention is by extruder, the head that is connected with extruder, the vacuum sizing tank that is connected with head successively and spraying cooling water groove, be installed in multi-track hauling machine, cast-cutting saw thereafter and turn over pipe support etc. and form successively.The connected mode of head and extruder is divided into directly to formula and right-angle type.Head by the machine neck that can be connected and installed with extruder, be installed in handpiece body on the machine neck, be installed in mouth mould on the handpiece body, be installed in shunting support in the handpiece body, be installed in the branch flow cone on the shunting support, the plug that is installed on the branch flow cone constitutes.The rear portion of plug has the number hollow mandrel identical with the spiral hole count, and the driving mechanism that can make the plug rotation also is installed on the handpiece body.The driving mechanism that is installed with on the handpiece body can make plug together with the rotation of hollow mandrel, extrudes threaded hole and inwall.Plug rotates soon more together with the hollow mandrel, and the pitch of threaded hole is more little.
Driving mechanism can by be sleeved on driven bevel pinion axle in the branch flow cone, be installed in the driven bevel pinion of driven bevel pinion shaft end, a plurality of hollow mandrels and the plug that is installed in active umbrella gear shaft on the handpiece body, is installed in the driving bevel gear of driving bevel gear shaft end and driven bevel pinion engagement and is installed in the driven bevel pinion axle other end with bearing constituted.The afterbody of active umbrella gear shaft is installed with to drive uses transmission.But driving and driven angular wheel shaft and driving and driven bevel gear and hollow mandrel all have the pore of bubbling air.Head is for directly to the formula head.Bubbling air helps the shaping and the setting of threaded hole.
Transmission is driven by extruder, through active umbrella gear shaft, driving bevel gear, driven bevel pinion, driven bevel pinion axle the hollow mandrel is rotated together with plug successively again, just can finish the production of two flat walls spiral hollow structure wall pipe.The head of this moment should be directly to the formula head.
Driving mechanism also can by be installed in driving shaft in the branch flow cone with bearing, be installed in the transmission of driveshaft end, a plurality of hollow mandrels and the plug that is installed in the driving shaft other end constitutes.But driving shaft and hollow mandrel all have the pore of bubbling air, and head is the right-angle type head.
Transmission directly drives driving shaft at this moment, the hollow mandrel rotates together with plug, just can finish the production of the two flat walls pipe that has threaded hole.The runner of the material of fusion between plug, hollow mandrel, mouthful mould extruded continuously, again through cooling, typing, the traction of once extruding production line, cut and turn over pipe etc. and can finish.
Mandrel can be a kind of in cylindrical, elliptical cylinder-shape, endless belt cylindricality, rectangle cylindricality, the polygon cylindricality, and the centre has pore.Self-evident, the number of mandrel should be corresponding with the number and the hole shape of threaded hole with shape.Pore is used for bubbling air, helps the shaping and the setting of threaded hole.
Task of the present invention comes to this and finishes.
The invention provides comprehensive mechanical performances such as a kind of existing good impact resistance, ring stiffness, axial pliability, superior processing performance is arranged again, can on the extruding production line of standard, produce, the production efficiency height, and in light weight, two flat walls spiral hollow structure wall pipe and once extruding production line thereof that production cost is low.It can be widely used in the buried pollution discharge row storm sewer construction of city.
Description of drawings
Fig. 1 is the structural representation of two flat walls spiral hollow structure wall pipe.
Fig. 2 is its transverse cross-sectional view.
Fig. 3 is the transverse cross-sectional view of another kind of two flat walls spiral hollow structure wall pipe.
Fig. 4 is straight general structure schematic diagram to the formula once extruding production line.
Fig. 5 is the general structure schematic diagram of right-angle type once extruding production line.
Fig. 6 is the profile of the head discharging opening of once extruding production line.
Fig. 7 is straight generalized section to the formula head.
Fig. 8 is the generalized section of right-angle type head.
Figure 1 shows that a kind of two flat walls spiral hollow structure wall pipe.It is made of the inwall 1 of smooth interior surfaces, the outer wall 2 and the endoporus 3 between inwall 1 and outer wall 2 of outer surface smoother.The muscle that hole wall 4 between the endoporus 3 constitutes between inwall 1 and the outer wall 2.Endoporus 3 is for running through the threaded hole of head and the tail.A with dashed lines has marked the position of moving towards of a threaded hole among the figure.
Figure 2 shows that a kind of two flat walls spiral hollow structure wall pipe.It is made of inwall 1, outer wall 2 and endoporus 3.The muscle that hole wall 4 between the endoporus 3 constitutes between inwall 1 and the outer wall 2.Endoporus 3 is for running through the threaded hole of head and the tail.Threaded hole (being endoporus 3) has 16, laterally is uniformly distributed along the circumference.The cross section of threaded hole is a circular hole.
Figure 3 shows that another kind of two flat walls spiral hollow structure wall pipe.The cross section of its endoporus 3 (being threaded hole) is the endless belt rectangle, has 12.
Fig. 4～shown in Figure 5, once extruding production line are by 1～2 extruder 5, the head 6 that is connected with extruder 5, the vacuum sizing tank 7 that is connected with head 6 successively and 1～4 spraying cooling water groove 8, be installed in multi-track hauling machine 9, cast-cutting saw 10 thereafter and turn over pipe support 11 etc. and form successively.
Fig. 6 shows the discharging opening of the head of once extruding production line, and it is made up of mouth mould 14, hollow mandrel 18, plug 17.Have pore 25 in the hollow mandrel 18.Molten plastic is extruded by runner 27.
The extruding of once extruding production line that Figure 7 shows that a kind of two flat walls spiral hollow structure wall pipe used head.It by machine neck 12, the handpiece body 13 that can be connected and installed with extruder 5, be installed in mouth mould 14, shunting support 15 on the handpiece body 13, divide flow cone 16, plug 17 to be constituted.The rear portion of plug 17 has number and threaded hole 3 the same number of hollow mandrels 18.The driving mechanism that can make plug 17 rotations also is installed on the handpiece body 13.Driving mechanism is made of active umbrella gear shaft 22, driving bevel gear 23 and a plurality of hollow mandrel 18 and the plug 17 that are sleeved on driven bevel pinion axle 19 in the branch flow cone 16, driven bevel pinion 20, be installed on the handpiece body with bearing 21.The afterbody of active umbrella gear shaft 22 is installed with and drives with transmission 24.But driving and driven angular wheel shaft 22 and 19 and driving and driven bevel gear 23 and 20 and hollow mandrel 18 all have the pore 25 of bubbling air, head is for directly to the formula head.
Figure 8 shows that another kind is extruded uses head.This is a kind of right-angle handpiece.Its driving mechanism by be installed in driving shaft 26 in the branch flow cone 16 with bearing 21, be installed in the transmission 24 of driving shaft 26 ends, a plurality of hollow mandrels 18 and the plug 17 that is installed in driving shaft 26 other ends constitutes.But driving shaft 26 and hollow mandrel 18 all have the pore 25 of bubbling air, and head is the right-angle type head.
The specific embodiment
Specific embodiments of the invention are as follows:
1. 1 kinds of two flat walls spirals of embodiment hollow structure wall pipe.It is made of the inwall of smooth interior surfaces, the outer wall of outer surface smoother and the endoporus between inner and outer wall.Hole wall between the endoporus constitutes the muscle between the inner and outer wall.Endoporus is the threaded hole that runs through head and the tail.Threaded hole is that endoporus has 16, laterally is uniformly distributed along the circumference.It is a kind of circular hole.It is extruded by PVC-U (PVC-U) and forms.As shown in Figure 2.
2. 1 kinds of two flat walls spirals of embodiment hollow structure wall pipe.It is made of the inwall of smooth interior surfaces, the outer wall of outer surface smoother and the endoporus between inner and outer wall.Hole wall between the endoporus constitutes the muscle between the inner and outer wall.Endoporus is the threaded hole that runs through head and the tail.Threaded hole is that endoporus has 12, laterally is uniformly distributed along the circumference.It is a kind of endless belt shape hole.Extrude by polyethylene (PE) and to form.As shown in Figure 3.
3. 1 kinds of two flat walls spirals of embodiment hollow structure wall pipe.It is made of inside and outside wall and endoporus.Endoporus is the threaded hole that runs through head and the tail.Threaded hole has a plurality of, laterally is uniformly distributed along the circumference.It is extruded by polypropylene (PP) and forms.
Comprehensive mechanical performances such as embodiment 1～embodiment 3 existing good impact resistances, ring stiffness, axial pliability have superior processing performance again, can on the extruding production line of standard, produce, and the production efficiency height, and also in light weight, production cost is low.It can be widely used in the buried pollution discharge row rainwater of city.
The once extruding production line of 4. 1 kinds of two flat walls spirals of embodiment hollow structure wall pipe.It is by extruder, the head that is connected with extruder, the vacuum sizing tank that is connected with head successively and spraying cooling water groove, be installed in multi-track hauling machine, cast-cutting saw thereafter and turn over pipe support etc. and form successively, and the connected mode of head and extruder is divided into directly to formula.Head by the machine neck that can be connected and installed with extruder, be installed in handpiece body on the machine neck, be installed in mouth mould on the handpiece body, be installed in shunting support in the handpiece body, be installed in the branch flow cone on the shunting support, the plug that is installed on the branch flow cone constitutes.The rear portion of plug has the number hollow mandrel identical with the spiral hole count.The driving mechanism that can make the plug rotation also is installed on the handpiece body.Driving mechanism by be sleeved on driven bevel pinion axle in the branch flow cone, be installed in the driven bevel pinion of driven bevel pinion shaft end, a plurality of hollow mandrels and the plug that is installed in active umbrella gear shaft on the handpiece body, is installed in the driving bevel gear of driving bevel gear shaft end and driven bevel pinion engagement and is installed in the driven bevel pinion axle other end with bearing constituted.The afterbody of active umbrella gear shaft is installed with to drive uses transmission.But driving and driven angular wheel shaft and driving and driven bevel gear and hollow mandrel all have the pore of bubbling air.Head is for directly to the formula head.Wherein air-cored axis is cylindrical.
Embodiment 5.A kind of once extruding production line of two flat walls spiral hollow structure wall pipe.Its driving mechanism by be installed in driving shaft in the branch flow cone with bearing, be installed in the transmission of driveshaft end, a plurality of hollow mandrels and the plug that is installed in the driving shaft other end constitutes.But driving shaft and hollow mandrel all have the pore of bubbling air.Head is the right-angle type head.Wherein air-cored axis is the rectangle cylindricality.
Claims (9)
1. two flat walls spiral hollow structure wall pipe, it is made of the inwall of smooth interior surfaces, the outer wall of outer surface smoother and the endoporus between inner and outer wall, hole wall between the endoporus constitutes the muscle between the inner and outer wall, it is characterized in that said endoporus is the threaded hole that runs through head and the tail.
2. according to the described two flat walls spiral of claim 1 hollow structure wall pipe, it is a plurality of to it is characterized in that said threaded hole has, and laterally is uniformly distributed along the circumference.
3. according to claim 1 or 2 described two flat walls spiral hollow structure wall pipes, it is characterized in that said threaded hole can be a kind of in circular hole, elliptical aperture, endless belt shape hole, rectangular opening, the polygonal hole.
4. according to the described two flat walls spiral of claim 3 hollow structure wall pipe, the outer warp that it is characterized in that said two flat walls pipe is less than 3 meters.
5. according to claim 1 or 2 described two flat walls spiral hollow structure wall pipes, it is characterized in that it is formed by a kind of the extruding of PVC-U (PVC-U), polypropylene (PP), polyethylene plastics such as (PE).
6. once extruding production line according to the described two flat walls spiral of claim 1 hollow structure wall pipe, it is by extruder, the head that is connected with extruder, vacuum sizing tank that is connected with head successively and spraying cooling water groove, be installed in multi-track hauling machine thereafter successively, cast-cutting saw and turn over compositions such as pipe support, the connected mode of head and extruder is divided into directly to formula and right-angle type, it is characterized in that said head is by the machine neck that can be connected and installed with extruder, be installed in the handpiece body on the machine neck, be installed in the mouth mould on the handpiece body, be installed in the shunting support in the handpiece body, be installed in the branch flow cone on the shunting support, the plug that is installed on the branch flow cone constitutes, the rear portion of plug has the number hollow mandrel identical with the spiral hole count, and the driving mechanism that can make the plug rotation also is installed on the handpiece body.
7. according to the once extruding production line of the described two flat walls spiral of claim 6 hollow structure wall pipe, it is characterized in that said driving mechanism is by the driven bevel pinion axle that is sleeved in the branch flow cone, be installed in the driven bevel pinion of driven bevel pinion shaft end, be installed in active umbrella gear shaft on the handpiece body with bearing, being installed in the driving bevel gear of driving bevel gear shaft end and driven bevel pinion engagement and a plurality of hollow mandrels and the plug that is installed in the driven bevel pinion axle other end constitutes, the afterbody of active umbrella gear shaft is installed with to drive uses transmission, main, driven bevel pinion axle and master, but driven bevel pinion and hollow mandrel all have the pore of bubbling air, and head is for directly to the formula head.
8. according to the once extruding production line of the described two flat walls spiral of claim 6 hollow structure wall pipe, it is characterized in that said driving mechanism by be installed in driving shaft in the branch flow cone with bearing, be installed in the transmission of driveshaft end, a plurality of hollow mandrels and the plug that is installed in the driving shaft other end constitutes, but driving shaft and hollow mandrel all have the pore of bubbling air, and head is the right-angle type head.
9. according to the once extruding production line of the described two flat walls spiral of claim 6 hollow structure wall pipe, it is characterized in that said hollow mandrel can be a kind of in cylindrical, elliptical cylinder-shape, endless belt cylindricality, rectangle cylindricality, the polygon cylindricality, the centre has pore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021357242A CN1220579C (en) | 2002-10-04 | 2002-10-04 | Spiral hollow-wall pipe with two flat walls and its once extruding production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021357242A CN1220579C (en) | 2002-10-04 | 2002-10-04 | Spiral hollow-wall pipe with two flat walls and its once extruding production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1403268A true CN1403268A (en) | 2003-03-19 |
| CN1220579C CN1220579C (en) | 2005-09-28 |
Family
ID=4748323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021357242A Expired - Fee Related CN1220579C (en) | 2002-10-04 | 2002-10-04 | Spiral hollow-wall pipe with two flat walls and its once extruding production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1220579C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408305C (en) * | 2005-03-02 | 2008-08-06 | 广东联塑科技实业有限公司 | Double-walled spiral pipe production apparatus and production method thereof |
| CN102218808A (en) * | 2011-06-02 | 2011-10-19 | 张家港市同创机械有限公司 | Die head for manufacturing breathing mask |
| CN103568263A (en) * | 2012-08-11 | 2014-02-12 | 宁波康润机械科技有限公司 | Device for manufacturing double-flat-wall helical hollow wall pipe |
| CN103786326A (en) * | 2014-01-10 | 2014-05-14 | 芜湖新磊塑胶科技有限公司 | Mold for manufacturing double-layer pipe fitting and manufacturing method of double-layer pipe fitting |
| CN105082550A (en) * | 2015-08-12 | 2015-11-25 | 华南理工大学 | Composite tube/film with diamond check framework middle layer and forming method and device |
| CN109838627A (en) * | 2019-02-22 | 2019-06-04 | 湖南沃开新材料科技有限公司 | Double-layer vacuum spiral silencing pipe and production mold thereof |
| CN111231258A (en) * | 2020-01-21 | 2020-06-05 | 瑞瑶环境科技有限公司 | Integrally-formed plastic double-layer spiral rib hollow wall pipe, forming die and production process thereof |
-
2002
- 2002-10-04 CN CNB021357242A patent/CN1220579C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100408305C (en) * | 2005-03-02 | 2008-08-06 | 广东联塑科技实业有限公司 | Double-walled spiral pipe production apparatus and production method thereof |
| CN102218808A (en) * | 2011-06-02 | 2011-10-19 | 张家港市同创机械有限公司 | Die head for manufacturing breathing mask |
| CN102218808B (en) * | 2011-06-02 | 2013-01-30 | 张家港市同创机械有限公司 | Die head for manufacturing breathing mask |
| CN103568263A (en) * | 2012-08-11 | 2014-02-12 | 宁波康润机械科技有限公司 | Device for manufacturing double-flat-wall helical hollow wall pipe |
| CN103786326A (en) * | 2014-01-10 | 2014-05-14 | 芜湖新磊塑胶科技有限公司 | Mold for manufacturing double-layer pipe fitting and manufacturing method of double-layer pipe fitting |
| CN105082550A (en) * | 2015-08-12 | 2015-11-25 | 华南理工大学 | Composite tube/film with diamond check framework middle layer and forming method and device |
| CN109838627A (en) * | 2019-02-22 | 2019-06-04 | 湖南沃开新材料科技有限公司 | Double-layer vacuum spiral silencing pipe and production mold thereof |
| CN111231258A (en) * | 2020-01-21 | 2020-06-05 | 瑞瑶环境科技有限公司 | Integrally-formed plastic double-layer spiral rib hollow wall pipe, forming die and production process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1220579C (en) | 2005-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1220579C (en) | Spiral hollow-wall pipe with two flat walls and its once extruding production line | |
| CN101691897A (en) | Injection plastic double-wall corrugated pipe and manufacturing method thereof | |
| CN2570009Y (en) | Double flat wall helical hollow structural wall pipe and primary extrusion production line thereof | |
| CN103568263A (en) | Device for manufacturing double-flat-wall helical hollow wall pipe | |
| CN202753391U (en) | Double flat wall spiral hollow structure wall pipe manufacturing device | |
| CN2445165Y (en) | Double-wall hollow pipe | |
| CN1124926C (en) | Mehod and equipment for manufacturing metal skeleton reinforced composite plastic pipe | |
| CN2838927Y (en) | Double-wall spiral tube producing equipment | |
| CN2573208Y (en) | Double-wall plastic spiral tube forming machine | |
| CN101844398A (en) | Plastic double-wall winding corrugated pipe forming device | |
| CN1109212C (en) | High-strength composite plastic pipe of stretched and oriented polymer and with hollow reinforced structure in wall | |
| CN213383094U (en) | Large-diameter polymer pipeline hasp winding forming equipment | |
| CN212228581U (en) | Detection device is used in carbon nanotube production | |
| CN203223655U (en) | Steel-plastic composite winding structure wall pipe | |
| CN2738072Y (en) | Large diameter plastic screw structural wall pipe | |
| CN1924419A (en) | Coiling modeled steel/plastic composite pipe and its preparing process and equipment | |
| CN218749194U (en) | Suspension type core rod porous inner rib plastic extrusion die | |
| CN2533166Y (en) | Hollow wall tube | |
| CN2689028Y (en) | Hard and soft PVC composite co-extruding corrugated flexible pipes | |
| CN116001252B (en) | Extrusion shaping auxiliary device for winding forming of inner ribbed tube | |
| CN2335772Y (en) | Sound-damping drain pipe extrusion moulding device | |
| CN218876220U (en) | Co-extrusion die for special-shaped pipe structural wall pipe | |
| CN2438903Y (en) | High polymer stretch directional strong composite plastic pipe with hollow reinforcing structure on wall | |
| KR101523006B1 (en) | Pipe for reinforcing of structure on the water from the shock and the manufacturing devive and method | |
| CN213947355U (en) | Forming device is used in plastics tubular product processing production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |