CN201009418Y - Mold special for cross-linked polyethylene tube - Google Patents
Mold special for cross-linked polyethylene tube Download PDFInfo
- Publication number
- CN201009418Y CN201009418Y CNU2007201065475U CN200720106547U CN201009418Y CN 201009418 Y CN201009418 Y CN 201009418Y CN U2007201065475 U CNU2007201065475 U CN U2007201065475U CN 200720106547 U CN200720106547 U CN 200720106547U CN 201009418 Y CN201009418 Y CN 201009418Y
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- CN
- China
- Prior art keywords
- mould
- core
- screw
- screw rod
- die body
- 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.)
- Expired - Fee Related
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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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
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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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/64—Screws with two or more threads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a special mould of crosslinked polyethylene pipes which comprises an extrusion machine and a mould, wherein the extrusion machine consists of a screw cylinder and a screw rod arranged in the screw cylinder. The mould comprises a back mould body which is connected with the tail end of the screw cylinder. The back end of the back mould body is connected with a supporting plate with a diffluence cone which is arranged in the chamber body of the back mould body. The other side of the supporting plate is connected with a mould body, the chamber of which is provided with a transition mould core which is fixedly connected on the supporting plate. The tail end of the transition mould core is connected with a mandrel, the outer side of which is provided with an assorted neck ring mold. A shaping gap is left between the mandrel and the neck ring mold; a neck ring mold pressure plate is arranged on the outer side of the neck ring mold. The utility model has the advantages of a reasonable design of structure, stable material flow in the chamber, the multiple increase of the extrusion speed and the improvement of the quality of the pipes. Furthermore, the output of a host machine can be increased and the product quality and the percent of pass can be raised, for the adoption of a small helix angle, a low flute spiral, a screw rod with isometry, but not isobathic threads.
Description
Technical field
The utility model relates to a kind of mould, especially a kind of mould that is used to make cross-linked polyethylene pipe.
Background technology
There is following deficiency in cross-linked polyethylene pipe mould of the prior art: the one, because the inner die cavity design problem of mould, make mould inside material stock district deficiency, and speed can't improve.The 2nd, because the factor that is transported to plastic flow in the mould and flow velocity etc. and influence product quality can not effectively be adjusted in mould, cause easily and extrude part and lack edge less, limit, thickness differs, and the quality of plastic pipe can't further be improved.In addition, because polyethylene is when melt extruding under the effect of catalyst, for feeding, compression, plasticizing, the homogenizing of temperature and screw rod very high requirement is arranged all, common screw can not satisfy above-mentioned requirements, cause main frame output to descend, product is crossed crosslinked or defective such as crosslinked deficiency.
Summary of the invention
The utility model will solve the shortcoming of above-mentioned prior art, provides a kind of mould and screw rod to be suitable for producing the special-purpose mould for cross-linked polyethylene tube of cross-linked polyethylene pipe.
The utility model solves the technical scheme that its technical problem adopts: this special-purpose mould for cross-linked polyethylene tube, comprise extruder, mould, wherein extruder is made up of barrel and the screw rod that is positioned at barrel, have feed opening on the barrel, mould comprises the back die body that is connected the barrel tail end, back die body rear end is connected with the supporting plate that band divides flow cone, divides flow cone to be positioned at the cavity of back die body; The opposite side of supporting plate is connected with die body, is provided with the transition core rod that is fixed on the supporting plate in the cavity of this die body, and the tail end of transition core rod is connected with core, and the outside of this core is provided with the mouth mould that matches with it, leaves the moulding gap between core, mouthful mould; The outside of mouth mould is provided with a mouthful moulded board.
The utility model can be further perfect by following manner:
Form the buffering runner between transition core rod and the die body; Preceding half section of described core is gradually little piecemeal wedge shape, forms the material stock district between core preceding half section and mouthful mould.
Screw rod adopts minor spiral lift angle, shallow screw channel, screw thread equidistantly not to wait deep structure, and wherein lead angle is that the degree of depth of the screw channel of master screw lift angle is that the degree of depth master screw spiral groove depth, screw channel changes than being by being deep to shallow its from feeding end to the other end.
Screw rod inside is provided with screw rod core cooling tube, in this screw rod core cooling tube conduction oil is housed.
The effect that the utility model is useful is: the reasonable in design of the utility model mould, materials flow flow steadily in its cavity, can significantly improve extruded velocity, improve pipe workpiece quality.In addition, owing to adopted minor spiral lift angle, shallow screw channel, screw thread equidistantly not to wait dark screw rod, can increase main frame output, improve the quality of products and qualification rate, simple, the low cost of manufacture of this screw-rod structure can be processed different bores, wall thickness, can produce continuously, the cross-linked polyethylene pipe of production efficiency height, good product quality.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 be among Fig. 1 A-A to structural representation.
Description of reference numerals: 1. 18. fens flow cone 19. feed openings of 13. mouthfuls of moulded boards of die body 10. supporting plate 10-1. supporting plate passage 11. mouthfuls of moulds, 12. cores, 14. die bodys, 15. transition core rods, 16. connecting bolts, 17. bolts cooled off 20. feed openings, 21. flanges, 22. buffering 24. moulding gaps, runner 23. material stock districts after screw rod core cooling tube 2. screw rods 3. barrels 4. feeding sections 5. compression sections 6. conversion zones, 7. homogenizing zones 8. connected Hough 9..
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
With reference to accompanying drawing, this special-purpose mould for cross-linked polyethylene tube comprises extruder, mould, and wherein extruder is made up of barrel 3 and the screw rod 2 that is positioned at barrel 3, has feed opening 20 on the barrel 3.Screw rod 2 comprises feeding section 4, compression section 5, conversion zone 6, homogenizing zone 7, screw rod 2 adopts minor spiral lift angles, shallow screw channel, screw thread equidistantly not to wait deep structure, and wherein lead angle is that the degree of depth of 1/2-1/4, the screw channel of master screw lift angle is that the degree of depth of the 1/2-1/4 of master screw spiral groove depth, screw channel changes than being 1-2 by being deep to shallow its from feeding end to the other end.The master screw lift angle is 17.65 degree, and the standard spiral groove depth is about 15mm.Screw rod 2 inside are provided with screw rod core cooling tube 1, in this screw rod core cooling tube 1 conduction oil are housed, and adopt the conduction oil temperature control.Barrel 3 heads are provided with adpting flange 21.The bottom of feed opening 20 is provided with feed opening cooling 19.During screw rod 2 work, raw material enters in the barrel 3 from feed opening 20, under the rotation of screw rod 2, advance, and by thermal source heating in barrel 3 peripheries, in this process owing to adopted the screw rod 2 of minor spiral lift angle, so realized reducing the task of side-thrust; Simultaneously owing to adopt the screw rod 2 of shallow screw channel, so reduced the adhesive force between raw material and the screw rod 2; Owing to adopted screw thread equidistantly not wait dark screw rod 2, so realized the performance of plasticizing forming under the high pressure.Can realize the quantity-produced task as long as raw material just uninterruptedly sent into.
Mould comprises the back die body 9 that is connected barrel 3 tail ends, and back die body 9 links to each other with barrel 3 tail ends by connecting Hough 8.Back die body 9 rear ends are connected with the supporting plate 10 that band divides flow cone 18, divide flow cone 18 to be positioned at the cavity of back die body 9.The opposite side of supporting plate 10 is connected with die body 14 by bolt 17, is provided with the transition core rod 15 that is fixed on the supporting plate 10 in the cavity of this die body 14.Supporting plate 10 has supporting plate path 10-1, makes the materials flow in supporting plate 10 left sides can flow to opposite side.Form buffering runner 22 between transition core rod 15 outer walls and die body 14 inwalls.Transition core rod 15 is connected with supporting plate 10 by the connecting bolt 16 that has pore.The tail end of transition core rod 15 is connected with core 12, and the outside of this core 12 is provided with the mouth mould 11 that matches with it, leaves moulding gap 24 between core 12, mouthful mould 11.Preceding half section of core 12 is gradually little piecemeal wedge shape, forms material stock district 23 between preceding half section and mouthful mould 11.The outside of mouth mould 11 is provided with mouthful moulded board 13.
Behind the die body 9, materials flow is compressed and redistributes by minute flow cone 18 after materials flow is entered by extruder, and the stable buffering runner 22 of sending into enters material stock district 23 after the materials flow steadily, at last high-speed extrusion molding under pressure.Tubing specification difference only needs replacement port mould, core rod to get final product.That the fit clearance of described mouthful mould and core rod can be done is circular, square, triangle or other abnormal shapes.This gap is plastics and extrudes the not perisystolic wall thickness of part.
In sum, when using this mould,, can significantly improve extruded velocity, improve pipe workpiece quality owing to divide the structure in flow cone 18, buffering runner 22, material stock district 23.
Claims (4)
1. special-purpose mould for cross-linked polyethylene tube, comprise extruder, mould, wherein extruder is made up of barrel (3) and the screw rod (2) that is positioned at barrel (3), have feed opening (20) on the barrel (3), it is characterized in that: mould comprises the back die body (9) that is connected barrel (3) tail end, back die body (9) rear end is connected with the supporting plate (10) that band divides flow cone (18), divides flow cone (18) to be positioned at the cavity of back die body (9); The opposite side of supporting plate (10) is connected with die body (14), be provided with the transition core rod (15) that is fixed on the supporting plate (10) in the cavity of this die body (14), the tail end of transition core rod (15) is connected with core (12), the outside of this core (12) is provided with the mouth mould (11) that matches with it, leaves the moulding gap between core (12), mouthful mould (11); The outside of mouth mould (11) is provided with a mouthful moulded board (13).
2. special-purpose mould for cross-linked polyethylene tube according to claim 1 is characterized in that: form buffering runner (22) between described transition core rod (15) and the die body (14); Preceding half section of described core (12) is gradually little piecemeal wedge shape, forms material stock district (23) between core (12) preceding half section and mouthful mould (11).
3. special-purpose mould for cross-linked polyethylene tube according to claim 1, it is characterized in that: described screw rod (2) adopts minor spiral lift angle, shallow screw channel, screw thread equidistantly not to wait deep structure, and wherein lead angle is that the degree of depth of 1/2-1/4, the screw channel of master screw lift angle is that the degree of depth of the 1/2-1/4 of master screw spiral groove depth, screw channel changes than being 1-2 by being deep to shallow its from feeding end to the other end.
4. according to claim 1 or 2 or 3 described special-purpose mould for cross-linked polyethylene tube, it is characterized in that: described screw rod (2) inside is provided with screw rod core cooling tube (1), in this screw rod core cooling tube (1) conduction oil is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201065475U CN201009418Y (en) | 2007-02-13 | 2007-02-13 | Mold special for cross-linked polyethylene tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201065475U CN201009418Y (en) | 2007-02-13 | 2007-02-13 | Mold special for cross-linked polyethylene tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201009418Y true CN201009418Y (en) | 2008-01-23 |
Family
ID=39044353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201065475U Expired - Fee Related CN201009418Y (en) | 2007-02-13 | 2007-02-13 | Mold special for cross-linked polyethylene tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201009418Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837631B (en) * | 2009-12-02 | 2012-05-23 | 上海上塑控股（集团）有限公司 | Polyvinyl chloride pipe co-extrusion mould |
-
2007
- 2007-02-13 CN CNU2007201065475U patent/CN201009418Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837631B (en) * | 2009-12-02 | 2012-05-23 | 上海上塑控股（集团）有限公司 | Polyvinyl chloride pipe co-extrusion mould |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080123 Termination date: 20130213 |