CN204471818U - A kind of silane cross-linked polyethylene pipe extrusion die head special - Google Patents
A kind of silane cross-linked polyethylene pipe extrusion die head special Download PDFInfo
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- CN204471818U CN204471818U CN201420861646.4U CN201420861646U CN204471818U CN 204471818 U CN204471818 U CN 204471818U CN 201420861646 U CN201420861646 U CN 201420861646U CN 204471818 U CN204471818 U CN 204471818U
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Abstract
A kind of silane cross-linked polyethylene pipe extrusion die head special, belongs to tube extruding equipment technical field.It comprises handpiece body, spreader, shunting support, valve, bracket, mouth mould, core, core fixed bar etc., shunting support side arranges external compression plate and interior compressive plate, form the first annular channel between external compression plate and interior compressive plate, between mouth mould and core, form the second annular channel.The utility model is by adopting above-mentioned technology, second-compressed is carried out to splitting through shunting support the rectangle melt formed by the first annular channel and the second annular channel, increase the syncretizing effect of melt, eliminate interflow line, to melt by two second compression, add the syncretizing effect of melt, improve the mechanical property of heavy caliber pipe, reduce length and the size of head, reduce the time of staying of raw material in die head, decrease the precrosslink of heavy caliber organosilane crosslinked polyethylene, be beneficial to extruding of organosilane crosslinked polyethylene, make to extrude the tube surfaces obtained smooth, improve its quality.
Description
Technical field
The utility model belongs to tube extruding equipment technical field, is specifically related to a kind of silane cross-linked polyethylene pipe extrusion die head special of easy to operate, good product quality.
Background technology
Silane cross-linked polyethylene pipe is compared traditional polyvinyl piping materials and is had more superior heat-resisting, corrosion-resistant, anti-wear performance, and add that its raw material sources are extensive, equipment investment is little, achieves the high performance of general-purpose plastics, has widened the application of polyethylene pipe.Cross-linked polyethylene pipe is except small-bore pipeline is except heating in building, feedwater application, and its large diameter pipeline also starts the special industrial fields such as and high temperature chemical industry fluid conveying, metal pulp conveying anticorrosion in central heating, oil field and shows up prominently.
Silane cross-linked polyethylene pipe to thermo-responsive, easily produces precrosslink in extrusion process, makes molecule quantitative change large, and melt viscosity becomes large, produces melt fracture.Especially produce bigbore thick-wall tube, the increased resident time of melt in die head, more easily produces precrosslink, and therefore extruder die head plays a part very crucial for crosslinked with silicane pipe material product quality.In order to reduce die head buildup, the minor caliber pipe of organosilane crosslinked polyethylene generally all adopts stent-type to get to know, and such die head is simple, but if the disadvantage words that to be exactly the pressure of compression section in front too little, it is just not so good that interflow line is eliminated sometimes, affects pipe performance.But compression section pressure is too large, is unfavorable for extruding of organosilane crosslinked polyethylene, easily causes sharkskin to affect apparent mass.In addition because PEX tubing melt viscosity is large, shear heat is large, and wall thickness internal surface of pipe has little time cooling, causes pipe material inner wall coarse.Therefore the domestic PEX tubing seen mainly concentrates on below D63mm bore, and heavy caliber silane cross-linked polyethylene pipe difficulty of processing is large, and product percent of pass is low.
Utility model content
For the above-mentioned problems in the prior art, the purpose of this utility model is to provide a kind of silane cross-linked polyethylene pipe extrusion die head special of easy to operate, good product quality.
Described a kind of silane cross-linked polyethylene pipe extrusion die head special, comprise handpiece body, spreader, shunting support, valve, bracket, mouth mould, core, core fixed bar, core mold fixing plate, outer bright and clean circle, interior bright and clean circle and bright and clean circle pressing plate, it is characterized in that described shunting support side arranges external compression plate and interior compressive plate, the first annular channel is formed between external compression plate and interior compressive plate, first annular channel 17 gap is dumbbell structure, form the second annular channel between mouth mould and core, the first annular channel 17 is connected with the second annular channel 15.
Described a kind of silane cross-linked polyethylene pipe extrusion die head special, is characterized in that described spreader is threaded with core fixed bar.
Described a kind of silane cross-linked polyethylene pipe extrusion die head special, it is characterized in that the described mouth mould port of export arranges outer bright and clean circle, arrange bright and clean circle pressing plate outside described outer bright and clean circle, outer bright and clean circle and bright and clean circle pressing plate are fixed by screws on mouthful mould.
Described a kind of silane cross-linked polyethylene pipe extrusion die head special, is characterized in that the described core port of export arranges the interior bright and clean circle be fixedly connected with it.
Above-mentioned a kind of silane cross-linked polyethylene pipe extrusion die head special, comprise handpiece body, spreader, shunting support, valve, bracket, mouth mould, core, core fixed bar, core mold fixing plate, outer bright and clean circle, interior bright and clean circle and bright and clean circle pressing plate, described shunting support side arranges external compression plate and interior compressive plate, the first annular channel is formed between external compression plate and interior compressive plate, this runner gap is dumbbell shaped, relaxation after a compression is played to the rectangle melt formed through the segmentation of shunting support, increases the syncretizing effect of melt.Form the second annular channel between mouth mould and core, this runner is connected with first flow, and its annular gap is that gradual change is reduced, and carries out second time compression to melt, eliminates interflow line further.The utility model, by adopting above-mentioned technology, can carry out 2 second compression to melt, enhance the fusion effect of melt, and then eliminates interflow line, improves the mechanical property of heavy caliber pipe.Owing to adding the syncretizing effect of melt, length and the size of head can be reduced, and then reduce the time of staying of raw material in die head, decrease the precrosslink of heavy caliber organosilane crosslinked polyethylene; By at lengthening plug and the bright and clean circle of increase, effectively improve the rough inner surface problem of heavy caliber pipe,
die head is arrangedcooling port make cooling evenly, effective control plug temperature, prevent plug temperature too high, suppress internal surface of pipe to produce precrosslink and degraded.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
In figure: 1-handpiece body, 2-spreader, 3-shunts support, 4-valve, 5-adjustment screw, 6-bracket, 7-mouth mould, 8-core, 9-external compression plate, 10-core fixed bar, 11-core mold fixing plate, the outer bright and clean circle of 12-, bright and clean circle in 13-, the bright and clean circle pressing plate of 14-, 15-second annular channel, compressive plate in 16-, 17-first annular channel.
Detailed description of the invention
Below in conjunction with Figure of description, the utility model will be further described, but protection domain of the present utility model is not limited in this:
As shown in Figure 1, a kind of silane cross-linked polyethylene pipe extrusion die head special, comprise handpiece body 1, spreader 2, shunting support 3, valve 4, bracket 6, mouth mould 7, core 8, core fixed bar 10, core mold fixing plate 11, outer bright and clean circle 12, interior bright and clean circle 13 and bright and clean circle pressing plate 14, described spreader 2 and shunting support 3 are fixed by screws on handpiece body 1, spreader 2 is threaded with core fixed bar 10, shunting support 3 arranges valve 4, described mouth mould 7 is fixed on handpiece body 1 by bracket 6, described core 8 is positioned at mouthful mould 7, the second annular channel 15 is formed between mouth mould 7 and core 8, shunting support 3 side arranges external compression plate 9 and interior compressive plate 16, the first annular channel 17 is formed between external compression plate 9 and interior compressive plate 16, first annular channel 17 is connected with the second annular channel 15, first annular channel 17 gap is dumbbell shaped, to through shunting support 3 split formed rectangle melt play one compression after relaxation, increase the syncretizing effect of melt.The annular gap of the second annular channel 15 is that gradual change is reduced, and carries out second time compression to melt, eliminates interflow line further, the change of annular gap in " large-little-large-little " of whole runner.Like this when extruding, extrusion die carries out 2 second compression to melt, enhance the fusion effect of melt, improve the mechanical property of heavy caliber pipe, also length and the size of head can be reduced, and then reduce the time of staying of raw material in die head, decrease the precrosslink of heavy caliber organosilane crosslinked polyethylene.
As shown in the figure, mouth mould 7 port of export of the present utility model arranges outer bright and clean circle 12, outside described outer bright and clean circle 12, bright and clean circle pressing plate 14 is set, outer bright and clean circle 12 and bright and clean circle pressing plate 14 are fixed by screws on mouthful mould 7, described core 8 port of export arranges the interior bright and clean circle 13 be fixedly connected with it, effectively improve the rough inner surface problem of heavy caliber pipe, make the pipe workpiece quality that obtains better, in addition, the utility model is at extrusion die plug circumferentially built-in 4 cooling ports, cooling evenly, effective control plug temperature, prevent plug temperature too high, internal surface of pipe is suppressed to produce precrosslink and degraded.
Claims (4)
1. a silane cross-linked polyethylene pipe extrusion die head special, comprise handpiece body (1), spreader (2), shunting support (3), valve (4), bracket (6), mouth mould (7), core (8), core fixed bar (10) and core mold fixing plate (11), it is characterized in that described shunting support (3) side arranges external compression plate (9) and interior compressive plate (16), the first annular channel (17) is formed between external compression plate (9) and interior compressive plate (16), first annular channel (17) gap is dumbbell structure, the second annular channel (15) is formed between mouth mould (7) and core (8), first annular channel (17) is connected with the second annular channel (15).
2. a kind of silane cross-linked polyethylene pipe extrusion die head special according to claim 1, is characterized in that described spreader (2) is threaded with core fixed bar (10).
3. a kind of silane cross-linked polyethylene pipe extrusion die head special according to claim 1, it is characterized in that described mouth mould (7) port of export arranges outer bright and clean circle (12), arrange bright and clean circle pressing plate (14) outside described outer bright and clean circle (12), outer bright and clean circle (12) and bright and clean circle pressing plate (14) are fixed by screws on a mouthful mould (7).
4. a kind of silane cross-linked polyethylene pipe extrusion die head special according to claim 1, is characterized in that described core (8) port of export arranges the interior bright and clean circle (13) be fixedly connected with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420861646.4U CN204471818U (en) | 2014-12-31 | 2014-12-31 | A kind of silane cross-linked polyethylene pipe extrusion die head special |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420861646.4U CN204471818U (en) | 2014-12-31 | 2014-12-31 | A kind of silane cross-linked polyethylene pipe extrusion die head special |
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| CN204471818U true CN204471818U (en) | 2015-07-15 |
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| CN201420861646.4U Active CN204471818U (en) | 2014-12-31 | 2014-12-31 | A kind of silane cross-linked polyethylene pipe extrusion die head special |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109049608A (en) * | 2018-09-04 | 2018-12-21 | 武汉升瑞通管业有限公司 | A kind of conversion mold |
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2014
- 2014-12-31 CN CN201420861646.4U patent/CN204471818U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109049608A (en) * | 2018-09-04 | 2018-12-21 | 武汉升瑞通管业有限公司 | A kind of conversion mold |
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