CN201975170U - Teflon pushing die - Google Patents
Teflon pushing die Download PDFInfo
- Publication number
- CN201975170U CN201975170U CN2010205432278U CN201020543227U CN201975170U CN 201975170 U CN201975170 U CN 201975170U CN 2010205432278 U CN2010205432278 U CN 2010205432278U CN 201020543227 U CN201020543227 U CN 201020543227U CN 201975170 U CN201975170 U CN 201975170U
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- CN
- China
- Prior art keywords
- pushing
- angle
- line
- die
- push
- 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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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses a teflon pushing die comprising a pushing outer die and a pushing inner die. The pushing inner die is a cylindric bearing line; one end of the cylindric bearing line is conical-shaped and the surface roughness of the cone is 0.8 micrometer; the angle between the cylindric bearing line and the cone employs gradual variable angle smooth transition; the pushing outer die is provided with a cone chamber which has a straight cylinder segment on one end; the angle between the straight cylinder and the cone chamber employs gradual smooth transition and the surface roughness of an inner wall of the cone chamber is 0.8 micrometer; and the pushing outer die cooperates with the pushing inner die to form an annular cavity channel between the two dies, so that plastic is extruded from the cavity channel. The product, employing the utility model, has round and smooth appearance, good consistency of an external diameter, high concentricity, and high electric strength.
Description
Technical field
The utility model is applicable to wires and cables industry, and dispersed polytetrafluoroethylresin is pushed the Mould design principle.
Background technology
In wires and cables industry, use dispersed polytetrafluoroethylresin processing insulating barrier, at first the powdery dispersion resin is made blank at a certain amount of extrusion aid of adding after mixed, then blank is put into and pushed moulding in the cylinder barrel, the blank of making becomes fibrous, fiber can not have damage when pushing, have some setbacks once push, fibrous fracture, cause the surface not only, longitudinal cracking, external diameter is inhomogeneous, concentricity is poor, dielectric strength is sharply reduced, influence the every technical indicator of product, pushing freely is not main cause, be to cause greatly by the counter-pressure that produces in the process of pushing, the counter-pressure that produces greatly mainly is, pushing die sleeve, to hold line relevant with the machining accuracy of mould to the parameter of angle changeover portion, so the utility model improves the major parameter and the machining accuracy of pushing mould.
The content of utility model
The utility model provides a kind of machining accuracy of guaranteeing, guarantees the product appearance quality, stops the uneven and face checking phenomenon of external diameter, improves electric strength, and the polytetrafluoroethylene that conformance with standard requires is pushed mould.
The utility model technical solution problem provides following scheme:
A kind of polytetrafluoroethylene is pushed mould, comprise and push external mold and push internal mold, the described internal mold of pushing is the columned line that holds, described cylindric line one end that holds is coniform, described cylindric angle of holding between line and the circular cone adopts the angle smooth transition of gradual change type, described pushing has a conical cavity in the external mold, there is one section straight cylindrical to hold line at described conical cavity one end, described straight cylindrical holds the smooth transition of the angle employing gradual change type between line and the conical cavity, describedly push external mold and push internal mold and cooperate, pushing external mold and pushing toroidal cavity runner of formation between the internal mold, plastics are extruded by the cavity runner.
The described internal mold of pushing: the processing fineness outer surface at main position:
Push external mold: the processing fineness inner surface at main position:
Several angles in angle district are carried out translation-angle according to specification, want smooth transition between the angle, reduce counter-pressure.
The beneficial effects of the utility model:
The utility model is in order to ensure product quality, cut the waste, stop the generation of defective item, push external mold and push when cooperating between the internal mold, to adopt the angle smooth transition at changeover portion, so just improve the machining accuracy of each several part, reduce counter-pressure, make the smooth moulding of insulation, the product appearance rounding that processes, smooth, external diameter high conformity, the concentricity height, the electric strength height has guaranteed electrical property and mechanical performance.
Description of drawings
Fig. 1 pushes the structural representation of internal mold for the utility model.
Fig. 2 pushes the structural representation of external mold for the utility model.
Embodiment
Referring to accompanying drawing, a kind of polytetrafluoroethylene is pushed mould, comprise and push external mold 1 and push internal mold 2, pushing internal mold 2 is a cylindric line that holds, cylindrical drum one end is coniform 3, coniform 3 surface roughness is 0.8 micron, cylindric angle of holding between line and the circular cone adopts the angle smooth transition of gradual change type, push a conical cavity 4 is arranged in the external mold 1, conical cavity 4 one ends have one section straight cylinder 5, angle between cylinder 5 and the conical cavity 4 adopts the angle smooth transition of gradual change type, the inner wall surface roughness of conical cavity 4 is 0.8 micron, when pushing external mold 1 and pushing internal mold 2 and cooperate, push external mold 1 and push and form a toroidal cavity runner between the internal mold 2, plastics are extruded by the cavity runner.
Claims (1)
1. a polytetrafluoroethylene is pushed mould, comprise and push external mold and push internal mold, it is characterized in that: the described internal mold of pushing is the columned line that holds, described cylindric line one end that holds is coniform, described cylindric angle of holding between line and the circular cone adopts the angle smooth transition of gradual change type, described pushing has a conical cavity in the external mold, there is one section straight cylindrical to hold line at described conical cavity one end, described straight cylindrical holds the smooth transition of the angle employing gradual change type between line and the conical cavity, describedly push external mold and push internal mold and cooperate, pushing external mold and pushing toroidal cavity runner of formation between the internal mold, plastics are extruded by the cavity runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205432278U CN201975170U (en) | 2010-09-21 | 2010-09-21 | Teflon pushing die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205432278U CN201975170U (en) | 2010-09-21 | 2010-09-21 | Teflon pushing die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201975170U true CN201975170U (en) | 2011-09-14 |
Family
ID=44580268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205432278U Expired - Fee Related CN201975170U (en) | 2010-09-21 | 2010-09-21 | Teflon pushing die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201975170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115582989A (en) * | 2022-10-18 | 2023-01-10 | 南京肯特复合材料股份有限公司 | Method for improving surface smoothness of polytetrafluoroethylene extruded tube |
-
2010
- 2010-09-21 CN CN2010205432278U patent/CN201975170U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115582989A (en) * | 2022-10-18 | 2023-01-10 | 南京肯特复合材料股份有限公司 | Method for improving surface smoothness of polytetrafluoroethylene extruded tube |
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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: 20110914 Termination date: 20130921 |