CN111823533A - Ultrahigh molecular weight polyethylene tubular product extrusion moulding device - Google Patents
Ultrahigh molecular weight polyethylene tubular product extrusion moulding device Download PDFInfo
- Publication number
- CN111823533A CN111823533A CN202010566180.5A CN202010566180A CN111823533A CN 111823533 A CN111823533 A CN 111823533A CN 202010566180 A CN202010566180 A CN 202010566180A CN 111823533 A CN111823533 A CN 111823533A
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- Prior art keywords
- pipe
- molecular weight
- weight polyethylene
- extrusion
- ultra
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/885—External treatment, e.g. by using air rings for cooling tubular films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/065—HDPE, i.e. high density polyethylene
-
- 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
- B29L2023/22—Tubes or pipes, i.e. rigid
Abstract
An ultra-high molecular weight polyethylene pipe extrusion molding device comprises: the device comprises a spiral extruder, wherein a pipeline extrusion die head is arranged at the end head of the spiral extruder, an inner supporting pipe is fixedly arranged on the pipeline extrusion die head, and positioning supports are symmetrically arranged on two sides of the inner supporting pipe; utilize interior stay pipe to support the tubular product after the extrusion, interior stay pipe both sides set up drive chain respectively, utilize drive chain to drive the locating plate and remove, remove the in-process, the shaping piece on the locating plate of interior stay pipe both sides is closed, forms a cylindricality cavity, and the tubular product after the shaping has the cylindricality cavity and supports the intertube to flow through, forms the support to shaping tubular product, prevents to warp among the tubular product transportation process.
Description
Technical Field
The invention relates to the field of polyethylene pipe production equipment, in particular to an ultrahigh molecular weight polyethylene pipe extrusion molding device.
Background
Polyethylene is a highly crystalline, non-polar thermoplastic resin. The original polyethylene is milk white in appearance, and is semitransparent to a certain extent on a micro-thin section. Polyethylene pipe is also known as high density polyethylene. Polyethylene is a highly crystalline, non-polar thermoplastic resin. The original polyethylene is milk white in appearance, and is semitransparent to a certain extent on a micro-thin section. PE has excellent resistance to most domestic and industrial chemicals. Certain classes of chemicals cause chemical corrosion, such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride). The polymers are non-hygroscopic and have good resistance to water vapor and can be used for packaging applications. Polyethylene has very good electrical properties, especially high dielectric strength, making it very suitable for wire and cable. Medium to high molecular weight grades have excellent impact resistance, even at low temperatures of-40F at ambient temperature.
Directly extruding a polyethylene raw material into a tubular structure by using an extrusion molding machine in the production process of the polyethylene pipe, and cooling the molded tubular structure by flowing through a cooling water tank and then molding; the existing polyethylene pipe is still in a soft state after extrusion molding, and the pipe is easy to bend in the transportation process, so that the deformation of the pipe is caused, and the product quality is influenced.
Disclosure of Invention
The invention aims to solve the problem that a pipe after extrusion molding is easy to deform in the conveying process, and provides an ultrahigh molecular weight polyethylene pipe extrusion molding device.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
an ultra-high molecular weight polyethylene pipe extrusion molding device comprises:
the device comprises a spiral extruder, wherein a pipeline extrusion die head is arranged at the end head of the spiral extruder, an inner supporting pipe is fixedly arranged on the pipeline extrusion die head, and positioning supports are symmetrically arranged on two sides of the inner supporting pipe;
the annular slide is independently installed respectively on every locating support, annular slide internally mounted has drive chain, drive chain is driven by driving motor, be fixed with a plurality of locating plates on the drive chain, slidable mounting has the ejector pin on every locating plate, ejector pin one end is fixed with the briquetting, the ejector pin outside between briquetting and locating plate is around having the extrusion spring, ejector pin other end fixed mounting has the shaping piece, the shaping piece is close to interior stay pipe one side and is equipped with semi-circular curved surface, be equipped with spacing railing on the inside locating support of annular slide, when the shaping piece moves to being close to interior stay pipe one side, spacing railing extrusion briquetting.
Furthermore, a cooling flow channel is arranged inside the forming block along the semicircular curved surface, a water inlet pipeline and a water outlet pipeline are arranged inside the ejector rod, and the water inlet pipeline and the water outlet pipeline are respectively connected with the cooling flow channel.
Further, the locating support installs the driven shaft, install the driven fluted disc on the driven shaft, driven fluted disc meshing drive chain, install drive gear on the driven shaft, the back shaft is installed in the rotation of locating support, the back shaft upper end is fixed with the rotation water tank, the inlet channel passes through the pipe connection and rotates the water tank bottom, the back shaft lower extreme is fixed with driven gear, drive gear and driven gear meshing.
Further, install the gyro wheel on the briquetting, the gyro wheel contact limit railing.
Further, the annular slide way includes two sections of sharp slides that are parallel to each other and the circular arc slide way of the equal radius in both ends, the circular arc slide way is connected and is formed a confined ring at sharp slide way both ends, sharp slide way is on a parallel with the internal stay pipe, spacing railing is on a parallel with sharp slide way.
Further, the pipeline extrusion die head comprises an outer die and an inner core die, a connecting hopper with a horn mouth structure is arranged on one side of the outer die, the end with a larger caliber of the connecting hopper is connected with a discharge port of the screw extruder, the end with a small caliber is connected with the outer die, the inner core die is of a cylindrical structure, a plurality of supporting pieces are fixed on the outer side of one end of the inner core die in a radial direction in a radiating mode, the supporting pieces are fixedly installed inside the connecting hopper, and the inner supporting pipe is fixedly installed on the inner core die.
The invention has the beneficial effects that:
the pipe support is simple in structure, the inner support pipe is used for supporting the extruded pipe, the two sides of the inner support pipe are respectively provided with the driving chains, the driving chains are used for driving the positioning plates to move, in the moving process, the forming blocks on the positioning plates on the two sides of the inner support pipe are closed to form a cylindrical cavity, the formed pipe flows through the cylindrical cavity and the support pipe to form the support for the formed pipe, and the deformation of the pipe in the conveying process is prevented.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a view showing the mounting structure of the positioning plate, the ejector pin and the forming block;
FIG. 3 is a view showing the construction of the installation of the rotary water tank of the present invention;
FIG. 4 is a view of the driving chain of the present invention connected to the positioning plate;
FIG. 5 is a diagram of the annular chute of the present invention;
FIG. 6 is a cross-sectional view of a pipe extrusion die of the present invention;
in the figure: 1. a screw extruder; 12. a pipe extrusion die head; 13. an inner bracing tube; 14. positioning the bracket; 21. an annular chute; 23. a drive chain; 24. a drive motor; 25. positioning a plate; 26. a top rod; 27. briquetting; 28. a compression spring; 29. forming a block; 30. a limit rail; 41. a cooling flow channel; 42. a water inlet pipe; 43. a water outlet pipeline; 51. a driven shaft; 52. a driven fluted disc; 53. a drive gear; 54. a support shaft; 55. rotating the water tank; 56. a driven gear; 101. a roller; 201. a linear slideway; 202. a circular arc slideway; 301. an outer mold; 302. an inner core mold; 303. a connecting hopper; 304. and (7) supporting the sheet.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Example 1
As shown in fig. 1, 2, 4; an ultra-high molecular weight polyethylene pipe extrusion molding device comprises:
the device comprises a spiral extruder 1, wherein a pipeline extrusion die head 12 is arranged at the end of the spiral extruder 1, an inner supporting pipe 13 is fixedly arranged on the pipeline extrusion die head 12, and positioning brackets 14 are symmetrically arranged on two sides of the inner supporting pipe 13;
each positioning support 14 is independently provided with an annular slide rail 21, a driving chain 23 is arranged inside each annular slide rail 21, the driving chain 23 is driven by a driving motor 24, a plurality of positioning plates 25 are fixed on the driving chain 23, each positioning plate 25 is provided with a top rod 26 in a sliding manner, one end of each top rod 26 is fixed with a pressing block 27, an extrusion spring 28 surrounds the outer part of each top rod 26 between each pressing block 27 and the corresponding positioning plate 25, the other end of each top rod 26 is fixedly provided with a forming block 29, one side, close to the inner supporting tube, of each forming block 29 is provided with a semicircular curved surface, each positioning support 14 inside each annular slide rail 21 is provided with a limit railing 30, and when each forming block 29 moves to one side, close.
An ultrahigh molecular weight polyethylene tubular product extrusion moulding device, theory of operation:
polyethylene material is additionally arranged in the screw extruder 1 and is extruded by the pipeline extrusion die head 12 of the screw extruder 1, the extruded formed pipe is sleeved on the inner supporting pipe 13, meanwhile, the driving chains 23 on two sides of the inner supporting pipe 13 move in the annular slide 21 under the driving of the driving motor 24 and drive the positioning plate to move during movement, when the positioning plate 25 moves to a position between the limiting railing 30 and the inner supporting pipe 13, the pressing block 27 at one end of the top rod 26 on the positioning plate 25 is limited by the limiting railing 30, the top rod 26 is pushed to move towards one side of the inner supporting pipe 13, so that two forming blocks 29 symmetrical on two sides of the inner supporting pipe 13 are closed together, a cylindrical cavity is formed between the two forming blocks 29, the formed pipe is positioned in the cylindrical cavity, the formed pipe is supported by the forming blocks 29 and the inner supporting pipe 13 together, and the formed pipe is prevented from deforming.
Example 2
On the basis of the embodiment 1, as shown in fig. 1, fig. 2 and fig. 3; the inside of the forming block 29 is provided with a cooling channel 41 along a semicircular curved surface, the inside of the ejector rod 26 is provided with a water inlet pipe 42 and a water outlet pipe 43, and the water inlet pipe 42 and the water outlet pipe 43 are respectively connected with the cooling channel 41.
Driven shaft 51 is installed to locating support 14, installs driven fluted disc 52 on the driven shaft 51, and driven fluted disc 52 meshes drive chain 23, installs drive gear 53 on the driven shaft 51, and locating support 14 rotates and installs back shaft 54, and the back shaft 54 upper end is fixed with rotates water tank 55, and inlet channel 42 passes through the pipe connection and rotates the water tank 55 bottom, and back shaft 54 lower extreme is fixed with driven gear 56, and drive gear 53 meshes with driven gear 56.
In order to ensure that the formed pipe has certain toughness after leaving the forming block 29, the rotating water tank 55 is arranged, the driving chain 23 is used for driving the rotating water tank 55 to rotate, the lower part of the rotating water tank 55 is connected with the water inlet pipeline 42 through a pipeline, the rotating water tank 55 and the water inlet pipeline 42 can move synchronously, the pipeline connected with the water inlet pipeline 42 is prevented from being wound, cooling water enters the cooling flow channel 41 from the water inlet pipeline 42, water in the cooling flow channel 41 is discharged to the outside of the ejector rod 26 through the water outlet pipeline 43, the forming block 29 is cooled, and precooling of the forming pipeline is further realized, so that the formed pipe has certain toughness after leaving the forming block 29, and deformation of the pipe is prevented.
Example 3
On the basis of the embodiment 1, as shown in fig. 2, 3, 5 and 6; the pressing block 27 is provided with a roller 101, and the roller 101 contacts the limit rail 30. Reducing the friction between the press block 27 and the position-limiting rail 30.
The annular slide way 21 comprises two parallel linear slide ways 201 and arc slide ways 202 with two ends of equal radius, the arc slide ways 202 are connected to two ends of the linear slide ways 201 to form a closed circular ring, the linear slide ways 201 are parallel to the inner supporting tube 13, and the limit railings 30 are parallel to the linear slide ways 201. Ensuring that the forming block 29, when closed, can move in the direction of the axis of the forming tube.
The pipeline extrusion die head 12 comprises an outer die 301 and an inner core die 302, one side of the outer die 301 is provided with a connecting bucket 303 with a horn mouth structure, the larger end of the caliber of the connecting bucket 303 is connected with a discharge port of the screw extruder 1, the small-caliber end is connected with the outer die 301, the inner core die 302 is in a cylindrical structure, the outer side of one end of the inner core die 302 is fixed with a plurality of supporting pieces 304 in a radial direction divergence mode, the supporting pieces 304 are fixedly installed inside the connecting bucket 303, the inner core die 302, the outer die 301 and the connecting bucket 303 are coaxially arranged, and the inner supporting pipe 13 is fixedly installed at the. The area of the feed inlet of the connecting hopper 303 is large, and along with the reduction of the caliber, the raw materials are extruded in the connecting hopper 303, so that the quality of pipeline forming is improved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An ultra-high molecular weight polyethylene pipe extrusion molding device is characterized by comprising:
the device comprises a spiral extruder, wherein a pipeline extrusion die head is arranged at the end head of the spiral extruder, an inner supporting pipe is fixedly arranged on the pipeline extrusion die head, and positioning supports are symmetrically arranged on two sides of the inner supporting pipe;
the annular slide is independently installed respectively on every locating support, annular slide internally mounted has drive chain, drive chain is driven by driving motor, be fixed with a plurality of locating plates on the drive chain, slidable mounting has the ejector pin on every locating plate, ejector pin one end is fixed with the briquetting, the ejector pin outside between briquetting and locating plate is around having the extrusion spring, ejector pin other end fixed mounting has the shaping piece, the shaping piece is close to interior stay pipe one side and is equipped with semi-circular curved surface, be equipped with spacing railing on the inside locating support of annular slide, when the shaping piece moves to being close to interior stay pipe one side, spacing railing extrusion briquetting.
2. The extrusion molding device for the ultra-high molecular weight polyethylene pipe as claimed in claim 1, wherein the molding block is provided with a cooling channel along a semicircular curved surface inside, the top rod is provided with a water inlet pipe and a water outlet pipe inside, and the water inlet pipe and the water outlet pipe are respectively connected with the cooling channel.
3. The extrusion molding device for the ultra-high molecular weight polyethylene pipe as claimed in claim 2, wherein the positioning bracket is provided with a driven shaft, the driven shaft is provided with a driven fluted disc, the driven fluted disc is engaged with the driving chain, the driven shaft is provided with the driving gear, the positioning bracket is rotatably provided with a supporting shaft, the upper end of the supporting shaft is fixed with a rotating water tank, the water inlet pipeline is connected to the bottom of the rotating water tank through a pipeline, the lower end of the supporting shaft is fixed with the driven gear, and the driving gear is engaged with the driven gear.
4. The extrusion molding device for the ultra-high molecular weight polyethylene pipe as claimed in claim 1, wherein the pressing block is provided with a roller, and the roller contacts with the limit rail.
5. The extrusion molding device for the ultra-high molecular weight polyethylene pipe according to claim 1, wherein the annular slide comprises two parallel linear slides and arc slides with equal radius at two ends, the arc slides are connected to two ends of the linear slides to form a closed ring, the linear slides are parallel to the inner supporting tube, and the limit railings are parallel to the linear slides.
6. The extrusion molding device for the ultra-high molecular weight polyethylene pipe as claimed in claim 1, wherein the pipe extrusion die head comprises an outer die and an inner core die, one side of the outer die is provided with a connecting hopper with a bell mouth structure, the larger end of the connecting hopper is connected with a discharge port of the screw extruder, the smaller end of the connecting hopper is connected with the outer die, the inner core die is in a cylindrical structure, a plurality of support pieces are fixed on the outer side of one end of the inner core die in a radial direction in a divergent manner, the support pieces are fixedly installed inside the connecting hopper, and the inner support pipe is fixedly installed on the inner core die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010566180.5A CN111823533B (en) | 2020-06-19 | 2020-06-19 | Ultrahigh molecular weight polyethylene tubular product extrusion moulding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010566180.5A CN111823533B (en) | 2020-06-19 | 2020-06-19 | Ultrahigh molecular weight polyethylene tubular product extrusion moulding device |
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| Publication Number | Publication Date |
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| CN111823533A true CN111823533A (en) | 2020-10-27 |
| CN111823533B CN111823533B (en) | 2022-05-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1433881A (en) * | 2002-01-19 | 2003-08-06 | 汪兆钧 | Steel-plastics combined pipe extrusion mould head using hole-penetrated steel pipe as frame |
| CN101579915A (en) * | 2008-05-14 | 2009-11-18 | 甘肃比高塑胶电气有限公司 | Pre-setting supporting assembling die for plastic extruder |
| CN103419350A (en) * | 2013-08-27 | 2013-12-04 | 青州市塑霸机械有限公司 | Plastic pipe mould cooling device capable of carrying out continuous circulating operation |
| CN207842013U (en) * | 2018-01-18 | 2018-09-11 | 重庆惠申橡塑有限公司 | A kind of star-like sheath dragger |
| CN109291386A (en) * | 2018-09-26 | 2019-02-01 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force grouted anchor bar plastic tube process units |
| CN209580544U (en) * | 2019-01-05 | 2019-11-05 | 陕西飞天管业科技有限公司 | A kind of double-wall corrugated pipe forming device |
| CN209633706U (en) * | 2019-02-20 | 2019-11-15 | 湖南真地道管业科技有限公司 | A kind of high speed steel strip reinforced polyvinyl piping materials extruder |
| CN110509524A (en) * | 2019-07-19 | 2019-11-29 | 浙江宏途电气科技有限公司 | A kind of pipe tractor |
| CN210477114U (en) * | 2019-07-15 | 2020-05-08 | 甘肃天业节水有限公司 | Fixing clamp for plastic pipe production |
| CN111231259A (en) * | 2020-03-19 | 2020-06-05 | 重庆金山洋生管道有限公司 | Integral forming method of PVC corrugated pipe |
-
2020
- 2020-06-19 CN CN202010566180.5A patent/CN111823533B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433881A (en) * | 2002-01-19 | 2003-08-06 | 汪兆钧 | Steel-plastics combined pipe extrusion mould head using hole-penetrated steel pipe as frame |
| CN101579915A (en) * | 2008-05-14 | 2009-11-18 | 甘肃比高塑胶电气有限公司 | Pre-setting supporting assembling die for plastic extruder |
| CN103419350A (en) * | 2013-08-27 | 2013-12-04 | 青州市塑霸机械有限公司 | Plastic pipe mould cooling device capable of carrying out continuous circulating operation |
| CN207842013U (en) * | 2018-01-18 | 2018-09-11 | 重庆惠申橡塑有限公司 | A kind of star-like sheath dragger |
| CN109291386A (en) * | 2018-09-26 | 2019-02-01 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force grouted anchor bar plastic tube process units |
| CN209580544U (en) * | 2019-01-05 | 2019-11-05 | 陕西飞天管业科技有限公司 | A kind of double-wall corrugated pipe forming device |
| CN209633706U (en) * | 2019-02-20 | 2019-11-15 | 湖南真地道管业科技有限公司 | A kind of high speed steel strip reinforced polyvinyl piping materials extruder |
| CN210477114U (en) * | 2019-07-15 | 2020-05-08 | 甘肃天业节水有限公司 | Fixing clamp for plastic pipe production |
| CN110509524A (en) * | 2019-07-19 | 2019-11-29 | 浙江宏途电气科技有限公司 | A kind of pipe tractor |
| CN111231259A (en) * | 2020-03-19 | 2020-06-05 | 重庆金山洋生管道有限公司 | Integral forming method of PVC corrugated pipe |
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|---|---|
| CN111823533B (en) | 2022-05-27 |
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