CN115464865A - Expansion die for biaxial orientation polyvinyl chloride pipe - Google Patents
Expansion die for biaxial orientation polyvinyl chloride pipe Download PDFInfo
- Publication number
- CN115464865A CN115464865A CN202211258468.1A CN202211258468A CN115464865A CN 115464865 A CN115464865 A CN 115464865A CN 202211258468 A CN202211258468 A CN 202211258468A CN 115464865 A CN115464865 A CN 115464865A
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- China
- Prior art keywords
- section
- pull rod
- expansion
- polyvinyl chloride
- sizing
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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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/22—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes
- B29C55/24—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of tubes radial
Abstract
An expansion mould of a biaxial orientation polyvinyl chloride pipe relates to the technical field of pipe moulds; the device comprises a guide section, a step expansion section, a sizing section, a pull rod and a nut; the pull rod sequentially penetrates through the guide section, the step expansion section and the sizing section, and two ends of the pull rod are fixed through nuts respectively; a plurality of vent grooves are uniformly distributed on the conical surface of the stepped expansion section and the circumferential surface of the sizing section, and a plurality of first air holes are uniformly formed in the vent grooves; the pull rod is of a hollow pipe structure, and second air holes are formed in the side wall of the pull rod, located on the step expansion section and the sizing section. Compared with a PVC-U pipe, the wall thickness of the produced pipe can be reduced by 35-40%, so that the material is greatly saved, the cost is reduced, the production efficiency is greatly improved, and the expanding die has the advantages of simple structure, reasonable arrangement, low manufacturing cost and the like.
Description
Technical Field
The invention relates to the technical field of pipe dies, in particular to an expansion die for a biaxial orientation polyvinyl chloride pipe.
Background
The biaxially oriented polyvinyl chloride pipe is manufactured by a special orientation processing technology, and the processing technology is characterized in that a PVC-U pipe produced by an extrusion method is subjected to hoop stretching and axial stretching, so that PVC long-chain molecules in the pipe are regularly arranged in a biaxial direction, a novel PVC pipe with high strength, high toughness, high impact resistance and fatigue resistance is obtained, and the performance of the novel PVC pipe is far superior to that of a common PVC-U pipe.
The domestic biaxially oriented polyvinyl chloride pipe is still in the development starting stage, and an expansion mould matched with the biaxially oriented polyvinyl chloride pipe must be developed to obtain the biaxially oriented polyvinyl chloride pipe with excellent performance.
Disclosure of Invention
The invention aims to provide the expansion die for the biaxial orientation polyvinyl chloride pipe, which has the advantages of simple structure, reasonable design and convenient use, and aims to overcome the defects and shortcomings of the prior art.
In order to realize the purpose, the invention adopts the technical scheme that: the device comprises a guide section, a step expansion section, a sizing section, a pull rod and a nut; the pull rod sequentially penetrates through the guide section, the stepped expansion section and the sizing section, and two ends of the pull rod are fixed through nuts respectively; a plurality of vent grooves are uniformly distributed on the conical surface of the stepped expansion section and the circumferential surface of the sizing section, and a plurality of first air holes are uniformly arranged in the vent grooves; the pull rod is of a hollow pipe structure, and second air holes are formed in the side wall of the pull rod, located in the step expansion section and the sizing section.
Further, the diameter of the first air hole is 2-5.2mm.
Further, the connecting part of the guide section, the step expanding section and the sizing section is in smooth transition.
Further, the divergence angle α of each of the step divergence sections is less than 30 °.
Further, the length of the sizing section is 100-1200 mm.
After adopting the structure, the invention has the beneficial effects that: compared with a PVC-U pipe, the pipe produced by the expansion die for the biaxial orientation polyvinyl chloride pipe can reduce the wall thickness by 35-40 percent, greatly saves materials, reduces the cost, greatly improves the production efficiency, and has the advantages of simple structure, reasonable arrangement, low manufacturing cost and the like.
Drawings
FIG. 1 is a block diagram of the present invention.
Description of the reference numerals:
the device comprises a guide section 1, a stepped expansion section 2, a sizing section 3, a pull rod 4, a nut 5, a vent groove 6 and a first air hole 7.
Detailed Description
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, and 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 these drawings without creative efforts.
Referring to fig. 1, the following technical solutions are adopted in the present embodiment: the device comprises a guide section 1, a step expansion section 2, a sizing section 3, a pull rod 4 and a nut 5; the pull rod 4 sequentially penetrates through the guide section 1, the step expansion section 2 and the sizing section 3, two ends of the pull rod are respectively fixed through nuts 5, and the joints among the three sections are in smooth transition; a plurality of air grooves 6 are uniformly distributed on the conical surface of the stepped expansion section 2 and the circumferential surface of the sizing section 3, and a plurality of first air holes 7 with the diameters of 2 to 5.2mm are uniformly arranged in the air grooves 6; the pull rod 4 be central hollow tube structure, and be located and be provided with the second gas pocket on the pull rod lateral wall in ladder expansion section 2 and the sizing section 3, this second gas pocket can lead to outside compressed air to expansion mould inner chamber, and compressed air can only discharge through the first gas pocket on the circumference surface of the conical surface of mould ladder expansion section 2 and sizing section 3.
The divergence angle alpha of each section of the step divergence section 2 is less than 30 degrees.
The length of the fixed diameter section 3 is 100 to 1200mm.
When the specific embodiment is operated, the expansion mould of the specific embodiment is placed between a heating oven and a cooling spray box, a multi-crawler-type tractor is arranged behind the spray box, extruded PVC-U (polyvinyl chloride) blank tubes are kept at a certain speed under the action of multi-crawler-type traction under the temperature condition between the vitrification temperature and the melting temperature, and sequentially pass through a guide section 1, a step expansion section 2 and a sizing section 3 of the expansion mould, so that the PVC-U (thick stock blank) tubes are expanded in the circumferential direction and the axial direction to realize biaxial orientation, and then are cooled and shaped to form the PVC-O tubes.
The foregoing shows and describes the general principles and features of the present invention, together with the 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 given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. An expansion mould of biaxial orientation polyvinyl chloride tubular product which characterized in that: the device comprises a guide section, a step expansion section, a sizing section, a pull rod and a nut; the pull rod sequentially penetrates through the guide section, the step expansion section and the sizing section, and two ends of the pull rod are fixed through nuts respectively; a plurality of vent grooves are uniformly distributed on the conical surface of the stepped expansion section and the circumferential surface of the sizing section, and a plurality of first air holes are uniformly arranged in the vent grooves; the pull rod is of a hollow pipe structure, and second air holes are formed in the side wall of the pull rod, located in the step expansion section and the sizing section.
2. The expansion die for biaxially oriented polyvinyl chloride pipe according to claim 1, wherein: the diameter of the first air hole is 2-5.2mm.
3. The expansion die for biaxially oriented polyvinyl chloride pipe according to claim 1, wherein: the connecting part of the guide section, the step expanding section and the sizing section is in smooth transition.
4. The expansion die for biaxially oriented polyvinyl chloride pipes according to claim 1, wherein: the divergence angle alpha of each section of the step divergence section is less than 30 degrees.
5. The expansion die for biaxially oriented polyvinyl chloride pipe according to claim 1, wherein: the length of the sizing section is 100-1200 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211258468.1A CN115464865A (en) | 2022-10-14 | 2022-10-14 | Expansion die for biaxial orientation polyvinyl chloride pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211258468.1A CN115464865A (en) | 2022-10-14 | 2022-10-14 | Expansion die for biaxial orientation polyvinyl chloride pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115464865A true CN115464865A (en) | 2022-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211258468.1A Pending CN115464865A (en) | 2022-10-14 | 2022-10-14 | Expansion die for biaxial orientation polyvinyl chloride pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115464865A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116252464A (en) * | 2023-05-15 | 2023-06-13 | 河北建投宝塑管业有限公司 | Control system and control method for orientation process of oriented PVC-O pipe |
-
2022
- 2022-10-14 CN CN202211258468.1A patent/CN115464865A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116252464A (en) * | 2023-05-15 | 2023-06-13 | 河北建投宝塑管业有限公司 | Control system and control method for orientation process of oriented PVC-O pipe |
| CN116252464B (en) * | 2023-05-15 | 2023-08-11 | 河北建投宝塑管业有限公司 | Control system and control method for orientation process of oriented PVC-O pipe |
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