CN201201327Y - Heat insulation double-layer heat insulating mould core - Google Patents
Heat insulation double-layer heat insulating mould core Download PDFInfo
- Publication number
- CN201201327Y CN201201327Y CNU2008200572693U CN200820057269U CN201201327Y CN 201201327 Y CN201201327 Y CN 201201327Y CN U2008200572693 U CNU2008200572693 U CN U2008200572693U CN 200820057269 U CN200820057269 U CN 200820057269U CN 201201327 Y CN201201327 Y CN 201201327Y
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- CN
- China
- Prior art keywords
- mold core
- core rod
- heat insulation
- layer
- core
- 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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Abstract
The utility model relates to a double-layer heat insulation and isolation mold core which comprises a body (1); a diameter forming part is positioned on the body (1); the diameter forming part comprises an outer circular ring (2) and an inner circular ring (3); and a hollow heat insulation layer (4) is arranged between the inner circular ring (2) and the inner circular ring (3). The double-layer heat insulation and isolation mold core has the advantages that the mold core is suitable for the extruder process of all the prior extrusion tube type or semi-extrusion type mold cores; when the mold core is selected and assembled, the mold core does not need to be amplified and can not influence the extension ratio of plastic; moreover, an outer coated protective layer is so tight that various poor conditions caused by rubbing the mold core by a cable core are effectively overcome.
Description
Technical field
The utility model relates to the core rod in a kind of extrusion that is applied in cable insulation and outer jacket, relates in particular to a kind of one-tenth path portion structure of this core rod.
Background technology
At wires and cables industry, extruding of cable insulation and outer jacket all needs to use core rod.When cable core when extruding outer jacket, if too small or cable core center of apolegamy core rod and core rod misalignment are more for a long time, be easy to occur the phenomenon that cable core is wiped core rod, if wiping core rod, cable core (when particularly the cable core outermost layer is metal) will be taken away core rod part heat at once, the temperature of core rod is descended, what particularly the temperature of core rod one-tenth footpath section descended is faster, when having plastified good plastics in the extruder the time through the one-tenth of having lowered the temperature footpath section, will reduce at once with the temperature that becomes footpath section contact portion plastics, make plastics become the bad state of plasticizing by good plastifying state, have a strong impact on the flowability and the mouldability of plastics molten state, outer jacket will form scraggly shape and cause off-centre, produces waste product.
Summary of the invention
The utility model technical issues that need to address have provided a kind of insulation double thermal insulation core rod, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
The utility model comprises: body; On described body, settle one and become path portion; Described one-tenth path portion comprises an outer toroid and interior annulus; A hollow heat-insulation layer is arranged between described outer toroid and the interior annulus.
Compared with prior art, the beneficial effects of the utility model are: be applicable to all conventional tubular type or half extruder technologies of squeezing the tubular type core rod of squeezing, do not need to amplify during the core rod apolegamy, can not influence the draw ratio of plastics, and the outer jacket that coats is also very tight, has overcome cable core effectively and has wiped the various undesirable conditions that core rod caused.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is Figure 1A place enlarged drawing.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is described in further detail:
By Fig. 1, Fig. 2 as seen: the utility model comprises: body 1; On described body 1, settle one and become path portion; Described one-tenth path portion comprises an outer toroid 2 and interior annulus 3; A hollow heat-insulation layer 4 is arranged between described outer toroid 2 and the interior annulus 3;
The spacing of described hollow heat-insulation layer 4 is between 0.02 ~ 0.05cm.
The utility model causes plastics plasticizing condition of poor in order to overcome cable core wiping core rod, mainly be to start with from the heat conduction, considering to utilize air is the non-conductor of heat, the principle that heat transfer rate is slow, guarantee to wipe under the situation of core rod at cable core, reduce core rod as far as possible and become scattering and disappearing of footpath section outer surface heat, guarantee that the plasticizing of cable sheath plastics is good and smooth.
The scheme that the utility model is taked with principle is: core rod becomes path portion by an original whole annulus, make inside and outside two-layer annulus into, the centre is made hollow, the pattern that inside and outside two-layer annulus adopts spot welded type to connect, hollow parts utilizes the non-conductor of air as heat, and the heat of inside and outside two-layer annulus can not be transmitted timely mutually.When cable core is wiped core rod, what cable core at first contacted is the interior ring that core rod becomes the footpath section, the heat of interior ring at first part scatters and disappears, because there is the non-conductor of a layer of air as heat the centre, the heat of that one one-tenth footpath section outer shroud just can not be delivered to interior ring at once, and the temperature of outer shroud just can not descend at once, and plastics are surfaces that the process outer shroud is coated on cable core, because the temperature of outer shroud is relatively stable, bad situation just can not appear plastifying when stream of plastic is crossed outer shroud.
Adopt conventional core rod, wipe core rod, when the apolegamy core rod owing to worry cable core, the actual core rod specification that adopts will be amplified 2 ~ 6mm than theoretical value, and for armouring or electric cable with large cross-section, the value of amplification is also bigger, will influence the draw ratio of plastics this moment, and coat outer field sheath the phenomenon of pine is arranged.
And adopt the utility model to go for all conventional tubular type or half extruder technologies of squeezing the tubular type core rod of squeezing, do not need to amplify during the core rod apolegamy, can not influence the draw ratio of plastics, and the outer jacket that coats is also very tight, has overcome cable core effectively and wiped the various undesirable conditions that core rod caused.
Claims (2)
1. an insulation double thermal insulation core rod comprises: body (1); Go up one of arrangement at described body (1) and become path portion; It is characterized in that: described one-tenth path portion comprises an outer toroid (2) and interior annulus (3); Between described outer toroid (2) and the interior annulus (3) a hollow heat-insulation layer (4) is arranged.
2. insulation double thermal insulation core rod according to claim 1 is characterized in that: the spacing of described hollow heat-insulation layer (4) is between 0.02 ~ 0.05cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200572693U CN201201327Y (en) | 2008-04-15 | 2008-04-15 | Heat insulation double-layer heat insulating mould core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200572693U CN201201327Y (en) | 2008-04-15 | 2008-04-15 | Heat insulation double-layer heat insulating mould core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201201327Y true CN201201327Y (en) | 2009-03-04 |
Family
ID=40423639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200572693U Expired - Fee Related CN201201327Y (en) | 2008-04-15 | 2008-04-15 | Heat insulation double-layer heat insulating mould core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201201327Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425086A (en) * | 2013-09-04 | 2015-03-18 | 江苏上上电缆集团有限公司 | Heat insulation method for machine head of double-layer extrusion machine and machine head using heat insulation method |
| CN104875354A (en) * | 2015-04-24 | 2015-09-02 | 重庆泰山电缆有限公司 | High-voltage cable sheath extrusion technology, anti-sticking mold device and drying device |
| CN108908892A (en) * | 2018-07-09 | 2018-11-30 | 江苏中利集团股份有限公司 | A kind of two-tube coaxial-type cable extruding mold core |
-
2008
- 2008-04-15 CN CNU2008200572693U patent/CN201201327Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104425086A (en) * | 2013-09-04 | 2015-03-18 | 江苏上上电缆集团有限公司 | Heat insulation method for machine head of double-layer extrusion machine and machine head using heat insulation method |
| CN104875354A (en) * | 2015-04-24 | 2015-09-02 | 重庆泰山电缆有限公司 | High-voltage cable sheath extrusion technology, anti-sticking mold device and drying device |
| CN104875354B (en) * | 2015-04-24 | 2017-12-08 | 重庆泰山电缆有限公司 | Sheath of hv cable expressing technique, anti-glued die device and blow-dry device |
| CN108908892A (en) * | 2018-07-09 | 2018-11-30 | 江苏中利集团股份有限公司 | A kind of two-tube coaxial-type cable extruding mold core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Hangzhou Huaxin Electric Power Cable Co., Ltd. Assignor: Shanghai Huaxin Lihua Power Cable Co.,Ltd. Contract record no.: 2014310000156 Denomination of utility model: Heat insulation double-layer heat insulating mould core Granted publication date: 20090304 License type: Common License Record date: 20140912 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090304 Termination date: 20160415 |