CN204773483U - A inner core supports and pulls structure for PFA heavy -calibre light -wall pipe extrusion moulding - Google Patents
A inner core supports and pulls structure for PFA heavy -calibre light -wall pipe extrusion moulding Download PDFInfo
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- CN204773483U CN204773483U CN201520517555.3U CN201520517555U CN204773483U CN 204773483 U CN204773483 U CN 204773483U CN 201520517555 U CN201520517555 U CN 201520517555U CN 204773483 U CN204773483 U CN 204773483U
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- connecting rod
- inner core
- pfa
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- wall pipe
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Abstract
The utility model relates to a macromolecular material processing, concretely relates to an inner core supports and pulls structure for PFA heavy -calibre light -wall pipe extrusion moulding, the utility model discloses a scheme does: being connected with connecting rod (2) including connecting bolt (1), still including inner core (3) and lock nut (5), lock nut (5) also are connected with connecting rod (2), and the inner core overlap on the connecting rod, and the connecting rod is cylindrical or the hollow circular cylinder appears, and the inner core is the hollow circular cylinder and appears, and the inner core both ends are equipped with centre bore (6), and the inner core passes through central borehole jack on the connecting rod, have between centre bore and the connecting rod can satisfy the removal need the clearance, the the central axis of connecting rod and inner core coincides. The utility model discloses a structure can be in extrusion moulding PFA heavy -calibre light -wall pipe technology provides the support when pulling the light -wall pipe to it produces the product quality problem easily to solve current PFA heavy -calibre light -wall pipe extrusion moulding in -process effectively.
Description
Technical field
The utility model relates to the large-caliber thin-walled tubing extrusion molding of PFA in melt-processable fluoroplastics series material.In order to overcome prior art PFA large-diameter and thin-wall pipe in extrusion molding process, because traction causes light-wall pipe to fold the quality problems such as the folding line of generation and surface damage, provide a kind of Core support hitch structure for the large-caliber thin-walled tube extrusion molding of PFA.
Background technology
PFA (copolymer of polytetrafluoroethylene (PTFE) and perfluoroalkyl vinyl ether) comparatively early researchs and develops and produces and have the good thermoplastic fluoroelastomer plastics of the transparency, the compound of the full carbon fluorine structure of a class, because molecule linkwork perfluor structure possesses polytetrafluoroethylene (PTFE) physical property completely.Coefficient of friction is little, antistick characteristic is strong, and the chemical stability of excellence and corrosion resistance, there is best temperature tolerance simultaneously, can be in for a long time ± 200 DEG C of temperature difference are very in rugged environment, still can have the function that material behavior possesses, and be widely used in the anticorrosive fields of industry such as the anti-high and low-temp occasion of the military project such as Aeronautics and Astronautics, navigation leading-edge field and chemical industry, smelting, medicine, be the high performance polymer product that a class is not easily many.
China's the seventies in last century starts to introduce PFA raw material, has carried out Primary Study to processing and forming technology, its major research project:
(1) die press technology for forming research: principal item specification is 200x200mm, the following sheet material of thickness 30mm, diameter
bar within height 200mm and diameter
height 200mm, wall thickness 20mm is with inner sleeve.
(2) extruding-out process research, main trial-production application chemical industry heat transmission equipment diameter
within, the microtubule of wall thickness 0.6 ~ 1mm, and heavy caliber
the extrusion molding of wall thickness>=2mm chemical anticorrosion internal lining pipe, enter 21st century, the application market of PFA is expanded rapidly.Its consumption is also improved significantly, and part industrial products have been processed by the small lot in past and proceeded to batch production, simultaneously, along with going deep into of application study, to special industry with there is the product that property requires, also increase research dynamics, PFA heat-shrinkable tube is exactly one of them.
Because PFA has splendid antistick characteristic, anti-high and low-temp (-200 DEG C ~ 200 DEG C) performance is good, serviceability temperature wide ranges, anticorrosive anti-wear performance good (be 0.05 to the confficient of static friction of steel), and mechanical strength is high, under being operated in severe and complex working conditions, the optimal selection of industrial product material.Such as; the heat-shrinkable tube of various specialty printing and copier anticorrosion and antiadhesion roller sealer; the thermal contraction protective sleeve of open air and the outsourcing of submarine cable joint, but, because thermal contraction tube wall is thin; thickness is 0.1 ~ 0.2mm; its base tube thickness is 0.15 ~ 0.25mm (shrinkage ratio is 40%), causes great difficulty of processing, simultaneously to extrusion molding; according to the enterprise-quality standard of heat-shrinkable tube base tube, no marking, folding and thickness is even answered by base tube.But due to tubing wall thin, after extrusion molding and cooling and shaping, during traction, subsidiary engine cannot clamp, and to become in molding process maximum difficulty and thin-wall pipes extrusion molding together and draw the emphasis of capturing in tackling key problem technology.In extrusion molding heavy caliber (pipe diameter >=30mm) thin-walled (wall thickness≤0.3 ~ 0.5mm) heat absorption draw base tube process, because of the thin softness of tubing wall, radial direction cannot be stressed, base tube is caused to fold and base tube surface damage so very easy because drawing, thus causing PFA large-diameter and thin-wall pipe surface damage, product percent of pass is low.
Utility model content
The utility model is in order to overcome prior art PFA large-diameter and thin-wall pipe in extrusion molding process, due to the thin softness of tubing wall, traction radial direction cannot clamp, for preventing from drawing the problem skidded or produce because clamping causes light-wall pipe to fold folding line and cause tube surfaces to damage, provide a kind of Core support hitch structure for the large-caliber thin-walled tube extrusion molding of PFA.
A kind of Core support hitch structure for the large-caliber thin-walled tube extrusion molding of PFA of the present utility model, comprise connecting rod and connecting bolt, connecting bolt is connected with connecting rod, also comprise inner core and locking nut, locking nut is also connected with connecting rod, inner core cover is on connecting rod, connecting rod is cylindrical or hollow cylindrical, inner core is hollow cylindrical, inner core two ends are provided with centre bore, inner core is enclosed within connecting rod by centre bore, has the gap that can meet mobile needs between centre bore and connecting rod, and the axis of connecting rod and inner core overlaps.
On the basis of such scheme, the utility model is also designed to, and also comprises pad, and pad is enclosed within connecting rod, between inner core and locking nut.
On the basis of such scheme, the utility model is also designed to, and inner core is ganoid stainless steel tube.
On the basis of such scheme, the utility model is also designed to, and inner core is the stainless steel tube carrying out plating hard chromium on surface polishing.
On the basis of such scheme, the utility model is also designed to, and connecting bolt and connecting rod are for welding or being threaded.
On the basis of such scheme, the utility model is also designed to, and the length of connecting rod is greater than the length of inner core, and the length difference between connecting rod and inner core is the distance of extrusion neck ring mold to hauling machine.
On the basis of such scheme, the utility model is also designed to, and locking nut and connecting rod are for welding or being threaded.
The utility model is when the bigbore PFA light-wall pipe of extrusion molding, adopt stainless steel tube as inner core, fit clearance is had to meet between inner core and connecting rod mobile flexibly, under duty, inner core supports light-wall pipe, light-wall pipe is slided along core surface, ensure light-wall pipe smooth surface not easy damaged evenly and in distraction procedure, the good high-grade-goods rate of lumber recovery is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Core support hitch structure for the large-caliber thin-walled tube extrusion molding of PFA of the present utility model.
Detailed description of the invention
Be further described the utility model below in conjunction with specific embodiment, to help understanding the utility model better, but protection domain of the present utility model is not limited in these embodiments.
Fig. 1 is the structural representation of the Core support hitch structure for the large-caliber thin-walled tube extrusion molding of PFA of the present utility model.As shown in Figure 1, Core support hitch structure for the large-caliber thin-walled tube extrusion molding of PFA of the present utility model, comprise connecting rod (2) and connecting bolt (1), connecting bolt (1) is connected with connecting rod (2), also comprise inner core (3) and locking nut (5), locking nut (5) is also connected with connecting rod (2), locking nut and connecting rod are for being threaded, inner core cover is on connecting rod, connecting rod is cylindrical, inner core is hollow cylindrical, inner core two ends are provided with centre bore (6), inner core is enclosed within connecting rod by centre bore, the gap that can meet mobile needs is had between centre bore and connecting rod, the axis of connecting rod and inner core overlaps.
The Core support structure of the present embodiment is also provided with pad (4), and pad is enclosed within connecting rod, between inner core and locking nut.Connecting bolt (1) and connecting rod (2) are for being threaded.As an alternative solution, connecting bolt (1) also can be with connecting rod (2) and welds.The inner core of the present embodiment is ganoid stainless steel tube.
In the large-caliber thin-walled tube extrusion molding of PFA extrusion molding, the size of inner core can be set according to the size of the light-wall pipe that will prepare, in extrusion molding process, Core support light-wall pipe, and keep the gap of 1 ~ 2mm with light-wall pipe inner surface.Haulage gear can adopt caterpillar tractor structure, straightway when the length > hauling machine combination chain of inner core runs.After testing, after employing the utility model Core support structure, during preparation PFA large-diameter and thin-wall pipe, its product first-time qualification rate all reaches more than 98%, visible scheme of the present utility model efficiently solves large-diameter and thin-wall pipe in distraction procedure, because clamping causes light-wall pipe to fold the quality problems such as the folding line of generation and product surface damage.
Above-described embodiment is the utility model preferably embodiment; but embodiment of the present utility model is not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present utility model and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection domain of the present utility model.
Claims (7)
1. the Core support hitch structure for the large-caliber thin-walled tube extrusion molding of PFA, comprise connecting rod and connecting bolt, it is characterized in that, connecting bolt (1) is connected with connecting rod (2), also comprise inner core (3) and locking nut (5), locking nut (5) is also connected with connecting rod (2), inner core cover is on connecting rod, connecting rod is cylindrical or hollow cylindrical, inner core is hollow cylindrical, inner core two ends are provided with centre bore (6), inner core is enclosed within connecting rod by centre bore, the gap that can meet mobile needs is had between centre bore and connecting rod, the axis of connecting rod and inner core overlaps.
2. according to claim 1 for the Core support hitch structure of the large-caliber thin-walled tube extrusion molding of PFA, it is characterized in that, also comprise pad (4), pad is enclosed within connecting rod, between inner core and locking nut.
3. according to claim 1 for the Core support hitch structure of the large-caliber thin-walled tube extrusion molding of PFA, it is characterized in that, inner core is ganoid stainless steel tube.
4. according to claim 3 for the Core support hitch structure of the large-caliber thin-walled tube extrusion molding of PFA, it is characterized in that, inner core is the stainless steel tube carrying out plating hard chromium on surface polishing.
5. according to Claims 1-4 any one claim for the Core support hitch structure of the large-caliber thin-walled tube extrusion molding of PFA, it is characterized in that, connecting bolt (1) and connecting rod (2) are for welding or being threaded.
6. according to Claims 1-4 any one claim for the Core support hitch structure of the large-caliber thin-walled tube extrusion molding of PFA, it is characterized in that, the length of connecting rod is greater than the length of inner core, and the length difference between connecting rod and inner core is the distance of extrusion neck ring mold to hauling machine.
7. according to Claims 1-4 any one claim for the Core support hitch structure of the large-caliber thin-walled tube extrusion molding of PFA, it is characterized in that, locking nut and connecting rod are for welding or being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520517555.3U CN204773483U (en) | 2015-07-16 | 2015-07-16 | A inner core supports and pulls structure for PFA heavy -calibre light -wall pipe extrusion moulding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520517555.3U CN204773483U (en) | 2015-07-16 | 2015-07-16 | A inner core supports and pulls structure for PFA heavy -calibre light -wall pipe extrusion moulding |
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| CN204773483U true CN204773483U (en) | 2015-11-18 |
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| CN201520517555.3U Active CN204773483U (en) | 2015-07-16 | 2015-07-16 | A inner core supports and pulls structure for PFA heavy -calibre light -wall pipe extrusion moulding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622226A (en) * | 2020-12-30 | 2021-04-09 | 临海伟星新型建材有限公司 | Plastic pipe inner support traction tool and traction method thereof |
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2015
- 2015-07-16 CN CN201520517555.3U patent/CN204773483U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112622226A (en) * | 2020-12-30 | 2021-04-09 | 临海伟星新型建材有限公司 | Plastic pipe inner support traction tool and traction method thereof |
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