CN113370510B - Appearance rounding device is used in engineering plastic tubing production - Google Patents
Appearance rounding device is used in engineering plastic tubing production Download PDFInfo
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- CN113370510B CN113370510B CN202110927673.1A CN202110927673A CN113370510B CN 113370510 B CN113370510 B CN 113370510B CN 202110927673 A CN202110927673 A CN 202110927673A CN 113370510 B CN113370510 B CN 113370510B
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- cooling water
- water tank
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- cooling
- roller
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/16—Straightening or flattening
- B29C53/20—Straightening or flattening of tubes
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses an appearance rounding device for production of engineering plastic pipes, belongs to the technical field of plastic pipe production, and aims to solve the problems that the existing plastic pipe straightening device is poor in rounding effect and the plastic pipe floats on the water surface to be cooled unevenly when a water tank is cooled; the device comprises a bottom bracket, a rounding device and a cooling device, wherein the rounding device and the cooling device are arranged on the bottom bracket side by side; the circle correcting device comprises two circle correcting assemblies which are distributed in an up-and-down symmetrical mode; the cooling device comprises a cooling water tank, a lower supporting roller, an upper limiting roller and a movable driving assembly, wherein a plurality of rotatable lower supporting rollers are arranged in the cooling water tank. The design of the invention adopts six positioning rounding, and the rounding effect is better; the size can be adjusted in a large range, the device is suitable for the rounding operation of the plastic pipe in a larger size range, and the application range is wider; the plastic pipe is limited in the cooling water through the upper limiting roller with adjustable height in the cooling water tank, so that the plastic pipe is prevented from floating on the water surface to cause uneven cooling.
Description
Technical Field
The invention relates to the technical field of plastic pipe production, in particular to an appearance rounding device for engineering plastic pipe production.
Background
At present, the common rounding mode on the plastic pipe production line is to transversely and symmetrically arrange two rotating rollers around the plastic pipe, adjust the distance between the rotating rollers to be consistent with the diameter of the plastic pipe and then finish the rounding work of the plastic pipe, so that the diameters of the plastic pipe in all directions are kept consistent; the rounding device rounds the plastic pipe by two positions, and the rounding effect is poor; and the common water tank is adopted for soaking and cooling in most of the existing plastic pipe production lines, but the pipe fittings are made of plastic and float on the water surface, so that the cooling is not uniform, the outer walls of the plastic pipe fittings cannot be guaranteed to be uniformly cooled, the shrinkage is not uniform, and the quality of the pipe fittings is influenced.
The publication number CN108437422B discloses a plastic tubing appearance orthotic devices and a method for plastic tubing production line in the technical field of plastic tubing correction, including the mounting bracket, the heating pipe is installed to the position that the mounting bracket top leans on the right side, the cooling tube is installed to the position that the mounting bracket top leans on the left side, the heating pipe surface leans on the left side and the cooling tube surface leans on the right side position symmetry to be provided with the fluted disc that the structure is the same, installation arm surface symmetry is provided with the screwing device that the structure is the same, and screwing device runs through the installation arm, two be provided with rotatory roller between the screwing device that the structure is the same, the cooling tube surface has set gradually hot-water chamber, warm water chamber and cold water room from right side to left side, through installing rotatory roller between two fluted discs that the structure is the same, has guaranteed that the correction effect is the perfect circle, makes the diameter size that the device can correct the plastic tubing, has guaranteed the cooling effect. The device has smaller adjusting range and smaller application range of the rotating roller.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide the appearance rounding device for producing the engineering plastic pipe, which adopts six rotating rollers for positioning, has better rounding effect, larger adjusting range and wider application range, can limit the plastic pipe in cooling water and avoids the phenomenon of uneven cooling floating on the water surface.
In order to solve the technical problems, the invention adopts the following technical scheme:
the appearance rounding device for the production of the engineering plastic pipe comprises a bottom bracket, a rounding device and a cooling device, wherein the rounding device and the cooling device are arranged on the bottom bracket in parallel; the device is characterized in that the rounding device comprises two rounding components which are distributed up and down symmetrically; the rounding component comprises a bottom plate, side rotating rollers, side oil cylinders, middle rotating rollers, a middle fixing frame and side rotating frames, wherein the middle fixing frames are transversely and equidistantly fixedly arranged on the bottom plate, the two ends of each middle fixing frame are respectively hinged with the corresponding rotatable side rotating frame, the side oil cylinders are arranged on the side rotating frames, the fixed ends of the side oil cylinders are hinged with the bottom plate, and the moving ends of the side oil cylinders are hinged with the side rotating frames; the side rotating frame is provided with a rotatable side rotating roller, and the middle fixing frame is provided with a rotatable middle rotating roller; two rows of main supporting oil cylinders are arranged between the two rounding components, and the moving end and the fixed end of each main supporting oil cylinder are respectively and fixedly connected with two bottom plates which are distributed up and down symmetrically;
the cooling device comprises a cooling water tank, a lower supporting roller, an upper limiting roller and a movable driving assembly, wherein the cooling water tank is internally provided with a plurality of rotatable lower supporting rollers, and two ends of a lower supporting roller shaft are respectively arranged on two side walls of the cooling water tank through bearings; two moving frames are arranged in the cooling water tank and are respectively close to two side walls of the cooling water tank, two ends of each moving frame are movably arranged in sliding grooves at two ends of the cooling water tank, two ends of each moving frame are respectively provided with a sliding block, and the sliding blocks are arranged in the sliding grooves; the upper limiting rollers are arranged in the cooling water tank in a row, and two ends of the upper limiting roller shaft are respectively arranged on the two moving frames through bearings; the mobile driving assembly comprises a driving motor and a screw rod, the driving motor is arranged on the inner wall of one side of the cooling water tank, and one end of the screw rod is connected with a rotating shaft of the driving motor; the other end of the screw rod penetrates through the lower moving frame and then is arranged on the inner wall of the cooling water tank through the mounting block; the screw rod is rotatably connected with the mounting block; the screw rod is in threaded connection with the movable frame;
preferably, the end faces of two ends of the cooling water tank are respectively provided with a detachable fixed disc, and sealing rings are arranged in the fixed discs;
preferably, the cooling water tank is internally and transversely divided into a plurality of cooling cavities, and the temperature of cooling water in the cooling cavities is gradually increased towards the direction of the rounding device;
preferably, a rotatable carrier roller is arranged at one end of the bottom plate adjacent to the cooling water tank;
preferably, the supporting rollers and the middle rotating rollers on the same bottom plate are consistent in height;
preferably, the heights of the lower supporting rollers and the supporting rollers on the lower bottom plate are consistent;
preferably, the outer side surfaces of the middle rotating roller and the side rotating rollers are arc concave surfaces;
preferably, the end edge of the middle rotating roller is an arc-shaped surface with a radian;
preferably, the upper limit roller and the lower support roller are staggered.
The invention has the advantages that 1, six positions are positioned for roundness correction, and the roundness correction effect is better; 2. the size can be adjusted in a large range, the device is suitable for the rounding operation of the plastic pipe in a larger size range, and the application range is wider; 3. the plastic pipe is limited in the cooling water through the upper limiting roller with adjustable height in the cooling water tank, so that the plastic pipe is prevented from floating on the water surface to cause uneven cooling.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of an outline rounding device for engineering plastic pipe production according to the present invention;
FIG. 2 is a schematic structural diagram of a side surface of an outline rounding device for producing an engineering plastic pipe according to the present invention;
FIG. 3 is a schematic structural diagram of an end face of a cooling water tank of an external shape rounding device for producing engineering plastic pipes, provided by the invention;
FIG. 4 is a schematic cross-sectional view of the inside of a cooling water tank of an outline rounding device for producing engineering plastic pipes, according to the present invention;
FIG. 5 is a schematic structural view of a lower support roll in a cooling water tank of an outer shape rounding device for producing engineering plastic pipes, provided by the invention;
FIG. 6 is a schematic structural view of an upper limiting roller in a cooling water tank of an appearance rounding device for producing engineering plastic pipes, provided by the invention;
FIG. 7 is a schematic structural diagram of a middle rotating roller and a side rotating roller with arc-shaped concave outer side surfaces for the contour rounding device for producing engineering plastic pipes.
Description of reference numerals:
the device comprises a bottom plate 1, a side oil cylinder 2, a side rotating roller 3, a screw rod 4, a middle rotating roller 5, a middle fixing frame 6, a side rotating frame 7, a main supporting oil cylinder 8, a carrier roller 9, a lower supporting roller shaft 10, a cooling water tank 11, a bottom support 12, a fixed disc 13, a sealing ring 14, a lower supporting roller 15, a plastic pipe 16, a moving frame 17, an upper limiting roller 18, a sliding groove 19, cooling water 20, a mounting block 21, a driving motor 22 and a sliding block 23.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "in", "upper", "lower", "lateral", "inner", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1-7, an appearance rounding device for producing engineering plastic pipes comprises a bottom bracket 12, a rounding device and a cooling device, wherein the rounding device and the cooling device are arranged on the bottom bracket 12 in parallel;
the circle correcting device comprises two circle correcting assemblies which are distributed in an up-and-down symmetrical mode; the rounding component comprises a bottom plate 1, side rotating rollers 3, side oil cylinders 2, middle rotating rollers 5, middle fixing frames 6 and side rotating frames 7, wherein the middle fixing frames 6 are transversely and equidistantly fixed on the bottom plate 1, the two ends of each middle fixing frame 6 are respectively hinged with the corresponding rotatable side rotating frame 7, the side oil cylinders 2 are arranged on the side rotating frames 7, the fixed ends of the side oil cylinders 2 are hinged with the bottom plate 1, and the moving ends of the side oil cylinders 2 are hinged with the side rotating frames 7; the side rotating frame 7 can rotate under the push-pull of the side oil cylinder 2, so that the angle between the side rotating frame 7 and the middle fixing frame 6 is adjusted to adapt to the plastic pipes 16 with different sizes;
the side rotating frame 7 is provided with a rotatable side rotating roller 3, and the middle fixing frame 6 is provided with a rotatable middle rotating roller 5; two rows of main supporting oil cylinders 8 are arranged between the two rounding components, and the moving ends and the fixed ends of the main supporting oil cylinders 8 are respectively and fixedly connected with the two bottom plates 1 which are distributed up and down symmetrically; the main supporting oil cylinder 8 moves telescopically to drive the upper rounding correction assembly to move up and down, and then the distance between the two rounding correction assemblies which are symmetrically distributed up and down is adjusted to adapt to plastic pipes 16 with different sizes;
the cooling device comprises a cooling water tank 11, a lower supporting roller 15, an upper limiting roller 18 and a movable driving assembly, wherein a plurality of rotatable lower supporting rollers 15 are arranged in the cooling water tank 11, and two ends of a lower supporting roller shaft 10 are respectively arranged on two side walls of the cooling water tank 11 through bearings; two moving frames 17 are arranged in the cooling water tank 11 and are respectively close to two side walls of the cooling water tank 11, two ends of each moving frame 17 are movably arranged in sliding grooves 19 at two ends of the cooling water tank 11, two ends of each moving frame 17 are respectively provided with a sliding block 23, and the sliding blocks 23 are arranged in the sliding grooves 19; a plurality of upper limiting rollers 18 are arranged in a row in the cooling water tank 11, and two ends of the shaft of each upper limiting roller 18 are respectively arranged on the two movable frames 17 through bearings; the moving frame 17 can move up and down along the sliding chute 19 to realize the height adjustment of the upper limiting roller 18;
the mobile driving assembly comprises a driving motor 22 and a lead screw 4, the driving motor 22 is arranged on the inner wall of one side of the cooling water tank 11, and one end of the lead screw 4 is connected with a rotating shaft of the driving motor 22; the other end of the screw rod 4 penetrates through the lower moving frame 17 and then is arranged on the inner wall of the cooling water tank 11 through the mounting block 21; the lead screw 4 is rotatably connected with the mounting block 21; the screw rod 4 is in threaded connection with the movable frame 17; the screw rod 4 and the mounting block 21 can rotate relatively, and when the screw rod 4 rotates, the mounting block 21 is fixed; the screw rod 4 is in threaded connection with the movable frame 17, and the screw rod 4 can only move up and down and cannot rotate under the limitation of the sliding block 23 and the sliding groove 19, so that the movable frame 17 can be driven to move up and down when the screw rod 4 rotates.
Furthermore, the end faces of two ends of the cooling water tank 11 are respectively provided with a detachable fixed disk 13, and a sealing ring 14 is arranged in the fixed disk 13; the fixing plate 13 can be disassembled and replaced according to the size of the plastic pipe 16, and the sealing ring 14 is sealed to avoid water leakage.
Further, the inside of the cooling water tank 11 is transversely divided into a plurality of cooling cavities, and the temperature of the cooling water 20 in the plurality of cooling cavities gradually rises towards the direction of the rounding device; the temperature is gradually reduced, and the plastic pipe 16 is cooled step by step, so that the influence on the quality of the plastic pipe 16 caused by sudden temperature reduction is avoided;
further, a rotatable carrier roller 9 is arranged at one end of the bottom plate 1 adjacent to the cooling water tank 11; supporting and positioning the plastic pipe 16 moved out of the rounding device;
further, the supporting rollers 9 on the same bottom plate 1 are consistent with the middle rotating rollers 5 in height; the supporting heights of the plastic pipes 16 are consistent;
further, the lower supporting roller 15 is consistent with the supporting roller 9 on the lower bottom plate 1 in height; the supporting heights of the plastic pipes 16 are consistent;
furthermore, the outer side surfaces of the middle rotating roller 5 and the side rotating rollers 3 are arc concave surfaces; the joint area of the middle rotating roller 5, the side rotating rollers 3 and the outer side surface of the plastic pipe 16 is larger, the joint effect is better, and the correction or support effect is further improved;
further, the edge of the end part of the middle rotating roller 5 is an arc-shaped surface with radian; avoiding the presence of edges at the end edges that mark the surface of the plastic tube 16.
Further, the upper limit roller 18 and the lower support roller 15 are staggered; the limiting effect on the plastic pipe 16 is better, and the plastic pipe is effectively prevented from floating on the water surface.
The working principle is as follows: the device is arranged at a proper position of a plastic pipe 16 production line, and the heights of the rounding device and the upper limiting roller 18 of the water cooling device are adjusted according to the size of the plastic pipe 16;
when the circle correcting device is adjusted, the distance between the two circle correcting assemblies is adjusted through the telescopic motion of the main support oil cylinder 8; the angle of the side rotating roller 3 is adjusted through the telescopic motion of the side oil cylinder 2; the plastic pipe 16 is subjected to six-position positioning and rounding by combining four side rotating rollers 3 and two middle rotating rollers 5 which are vertically and symmetrically distributed;
when the height of the upper limiting roller 18 of the water cooling device is adjusted, the driving motor 22 works to drive the screw rod 4 to rotate, the screw rod 4 is in threaded connection with the moving frame 17, the moving frame 17 cannot rotate under the limitation of the sliding block 23 and the sliding groove 19 and can only move up and down along the sliding groove 19, and then the two moving frames 17 synchronously slide up or down under the driving of the screw rod 4 so as to adjust the height of the upper limiting roller 18;
a plastic pipe 16 enters from the left side of the rounding device, is straightened by two rounding components which are symmetrically distributed up and down, and enters the cooling water tank 11 through a sealing ring 14 at the end part of the cooling water tank 11; the straightened plastic pipe 16 is cooled by cooling water 20 and then is removed from the sealing ring 14 on the right side of the cooling water tank 11; in the process that the plastic pipe 16 moves in the cooling water tank 11, the lower supporting roller 15 supports the plastic pipe 16 at the bottom, and the upper limiting roller 18 limits the plastic pipe 16 at the upper part, so that the plastic pipe 16 is prevented from floating on the water surface to influence the cooling effect.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. The appearance rounding device for the production of the engineering plastic pipe comprises a bottom bracket, a rounding device and a cooling device, wherein the rounding device and the cooling device are arranged on the bottom bracket in parallel; the device is characterized in that the rounding device comprises two rounding components which are distributed up and down symmetrically; the rounding component comprises a bottom plate, side rotating rollers, side oil cylinders, middle rotating rollers, a middle fixing frame and side rotating frames, wherein the middle fixing frames are transversely and equidistantly fixedly arranged on the bottom plate, the two ends of each middle fixing frame are respectively hinged with the corresponding rotatable side rotating frame, the side oil cylinders are arranged on the side rotating frames, the fixed ends of the side oil cylinders are hinged with the bottom plate, and the moving ends of the side oil cylinders are hinged with the side rotating frames; the side rotating frame is provided with a rotatable side rotating roller, and the middle fixing frame is provided with a rotatable middle rotating roller; two rows of main supporting oil cylinders are arranged between the two rounding components, and the moving end and the fixed end of each main supporting oil cylinder are respectively and fixedly connected with two bottom plates which are distributed up and down symmetrically;
the cooling device comprises a cooling water tank, a lower supporting roller, an upper limiting roller and a movable driving assembly, wherein the cooling water tank is internally provided with a plurality of rotatable lower supporting rollers, and two ends of a lower supporting roller shaft are respectively arranged on two side walls of the cooling water tank through bearings; two moving frames are arranged in the cooling water tank and are respectively close to two side walls of the cooling water tank, two ends of each moving frame are movably arranged in sliding grooves at two ends of the cooling water tank, two ends of each moving frame are respectively provided with a sliding block, and the sliding blocks are arranged in the sliding grooves; the upper limiting rollers are arranged in the cooling water tank in a row, and two ends of the upper limiting roller shaft are respectively arranged on the two moving frames through bearings; the mobile driving assembly comprises a driving motor and a screw rod, the driving motor is arranged on the inner wall of one side of the cooling water tank, and one end of the screw rod is connected with a rotating shaft of the driving motor; the other end of the screw rod penetrates through the lower moving frame and then is arranged on the inner wall of the cooling water tank through the mounting block; the screw rod is rotatably connected with the mounting block; the lead screw is in threaded connection with the movable frame.
2. The shape rounding device for the production of engineering plastic pipes as claimed in claim 1, wherein the end faces of the two ends of the cooling water tank are respectively provided with a detachable fixed disk, and the fixed disks are internally provided with sealing rings.
3. The contour rounding device for the production of engineering plastic pipes as claimed in claim 2, wherein the cooling water tank is laterally divided into a plurality of cooling chambers, and the temperature of the cooling water in the plurality of cooling chambers is gradually increased toward the rounding device.
4. The contour rounding device for the production of engineering plastic pipes as claimed in claim 3, wherein a rotatable carrier roller is arranged at one end of the bottom plate adjacent to the cooling water tank.
5. The contour rounding device for the production of engineering plastic pipes as claimed in claim 4, wherein the supporting rollers and the intermediate rotating rollers on the same base plate have the same height.
6. The contour rounding device for the production of engineering plastic pipes as claimed in claim 5, wherein the lower supporting rollers and the supporting rollers on the lower bottom plate have the same height.
7. The contour rounding device for the production of engineering plastic pipes as claimed in claim 6, wherein the outer side surfaces of the middle rotating roller and the side rotating rollers are arc concave surfaces.
8. The contour rounding device for the production of engineering plastic pipes as claimed in any one of claims 1 to 7, wherein the end edge of the middle rotating roller is an arc-shaped surface with a radian.
9. The contour rounding device for the production of engineering plastic pipes as claimed in claim 1, wherein the upper limiting roller and the lower supporting roller are staggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110927673.1A CN113370510B (en) | 2021-08-13 | 2021-08-13 | Appearance rounding device is used in engineering plastic tubing production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110927673.1A CN113370510B (en) | 2021-08-13 | 2021-08-13 | Appearance rounding device is used in engineering plastic tubing production |
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| Publication Number | Publication Date |
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| CN113370510A CN113370510A (en) | 2021-09-10 |
| CN113370510B true CN113370510B (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110927673.1A Active CN113370510B (en) | 2021-08-13 | 2021-08-13 | Appearance rounding device is used in engineering plastic tubing production |
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| CN114101398A (en) * | 2021-11-12 | 2022-03-01 | 洛阳理工学院 | Internal stay formula return bend mouth of pipe rounding machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09141727A (en) * | 1995-11-22 | 1997-06-03 | Sekisui Chem Co Ltd | Thermoplastic resin pipe molding apparatus |
| EP1254757A1 (en) * | 2001-04-30 | 2002-11-06 | Odino Pontarolo | Guide roller for extrusion calibrators of tubular plastic films |
| CN205112356U (en) * | 2015-09-02 | 2016-03-30 | 新疆通利塑业有限公司 | PE pipe material extruder with circularity corrector |
| CN207190242U (en) * | 2017-08-19 | 2018-04-06 | 湖北天霖新材料有限公司 | A kind of cooling device of plastic pipe |
| CN208978239U (en) * | 2018-11-15 | 2019-06-14 | 河南盛程实业有限公司 | A kind of PPR pipe apparatus for correcting |
-
2021
- 2021-08-13 CN CN202110927673.1A patent/CN113370510B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09141727A (en) * | 1995-11-22 | 1997-06-03 | Sekisui Chem Co Ltd | Thermoplastic resin pipe molding apparatus |
| EP1254757A1 (en) * | 2001-04-30 | 2002-11-06 | Odino Pontarolo | Guide roller for extrusion calibrators of tubular plastic films |
| CN205112356U (en) * | 2015-09-02 | 2016-03-30 | 新疆通利塑业有限公司 | PE pipe material extruder with circularity corrector |
| CN207190242U (en) * | 2017-08-19 | 2018-04-06 | 湖北天霖新材料有限公司 | A kind of cooling device of plastic pipe |
| CN208978239U (en) * | 2018-11-15 | 2019-06-14 | 河南盛程实业有限公司 | A kind of PPR pipe apparatus for correcting |
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