CN203792687U - Extrusion die for improving plastic pipe inner surface quality - Google Patents
Extrusion die for improving plastic pipe inner surface quality Download PDFInfo
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- CN203792687U CN203792687U CN201420240439.7U CN201420240439U CN203792687U CN 203792687 U CN203792687 U CN 203792687U CN 201420240439 U CN201420240439 U CN 201420240439U CN 203792687 U CN203792687 U CN 203792687U
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- polytetrafluoroethylene
- ptfe
- collar
- ring flange
- extrusion die
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Abstract
The utility model discloses an extrusion die for improving the plastic pipe inner surface quality. The extrusion die comprises a core die, an upper pressing plate, a lower pressing plate, a polytetrafluoroethylene lantern ring and a connecting screw, wherein the polytetrafluoroethylene lantern ring is a rotary body, the axial section of the polytetrafluoroethylene lantern ring is in the shape of H, the lower pressing plate comprises a first cylinder portion and a first flange, one side of the first flange protrudes to form a first round ring, the first round ring tightly clamps one side of the polytetrafluoroethylene lantern ring, the upper pressing plate comprises a second cylinder portion and a second flange, the end face of the second flange protrudes to form a second round ring, the second round ring is arranged opposite to the first round ring and tightly clamps the other side of the polytetrafluoroethylene lantern ring, the outer diameter of the first cylinder portion and the outer diameter of the second cylinder portion are equal to the inner diameter of the polytetrafluoroethylene lantern ring, the upper pressing plate and the lower pressing plate are connected through the connecting screw, the lower pressing plate is fixedly connected to the core die, and the outer diameter of the polytetrafluoroethylene lantern ring is equal to the outer diameter of the core die. The extrusion die for improving the plastic pipe inner surface quality has the advantages of being high in accuracy and long in service life.
Description
Technical field
The present invention relates to plastics forming technique field, especially relate to a kind of extrusion die that improves plastic pipe inner surface quality.
Background technology
According to national Specification, the plastic conduit inner surface of extrusion molding should be smooth, smooth, without depression, bubble and other, affects the blemish of performance.But in routine check, find that the in esse defect in inner surface of tubing is diversified, as there is bubble and spot pit in rough surface, rough, surface, the mechanical property of these defective effect tubing, especially affect hydrostatic strength and the ring stiffness of tubing, thereby in pipeline engineering, leave hidden danger.
Chinese patent CN103660229A has announced a kind of core of extruding that improves polyvinyl piping materials fineness, it has core body, it is characterized in that: the tail end at core body adds a polytetrafluoroethylplastic plastic ring, and the external diameter of plastic hoop is consistent with the external diameter of core body tail end; Solved existing metal pattern and produced plastic pipe, the problem that inner surface fineness is low, shrink of product rate change in size is larger, is mainly used in the production and processing of vinyon tubing.
By whole analysis, the above-mentioned core of extruding has several defects, first, polytetrafluoroethylplastic plastic ring is affixed on core body by bolt, the benchmark of location is not accurate enough, the external diameter of the external diameter of plastic hoop and core body tail end easily produces deviation, and concentricity is bad, thereby affects the dimensional accuracy of polyvinyl piping materials; Secondly, polytetrafluoroethylplastic plastic ring is affixed to core body by screw, and service time is long, and polytetrafluoroethylplastic plastic ring is easily shifted under the pressure of polyvinyl piping materials, thereby can not guarantee polyvinyl piping materials precision, is therefore necessary to be improved.
Summary of the invention
The deficiency existing for above-mentioned prior art, the object of this invention is to provide a kind of extrusion die that improves plastic pipe inner surface quality, and it is high that it has precision, the feature of long service life.
To achieve these goals, the technical solution adopted in the present invention is: a kind of extrusion die that improves plastic pipe inner surface quality, it is characterized in that, comprise core, top board, lower platen, the polytetrafluoroethylene (PTFE) collar and attachment screw, the described polytetrafluoroethylene (PTFE) collar is revolving body, and its axial cross section is " work " font, described lower platen comprises the first cylindrical portion and is arranged on first cylindrical portion one end and radially protrudes the first ring flange forming, one side end face of described the first ring flange is protruded vertically and is formed the first annulus, one side of the described first annulus clamping polytetrafluoroethylene (PTFE) collar, described top board comprises the second cylindrical portion and is arranged on second cylindrical portion one end and radially protrudes the second ring flange forming, the end face of described the second ring flange protrudes vertically and forms the second annulus, described the second annulus and the first annulus are oppositely arranged and clamp the opposite side of the polytetrafluoroethylene (PTFE) collar, the external diameter of described the first cylindrical portion and the second cylindrical portion all equates with the internal diameter of the polytetrafluoroethylene (PTFE) collar, described top board is connected by attachment screw with lower platen, described lower platen is affixed to core, the external diameter of the described polytetrafluoroethylene (PTFE) collar equates with the external diameter of core.
In above-mentioned a kind of extrusion die that improves plastic pipe inner surface quality, the end of the first cylindrical portion is protruded vertically and is formed annulus boss, the end of the second cylindrical portion is recessed to form annular groove vertically, and described annulus boss can insert in annular groove and the external diameter of annulus boss and the internal diameter of annular groove equate.
In above-mentioned a kind of extrusion die that improves plastic pipe inner surface quality, the width of the described polytetrafluoroethylene (PTFE) collar is greater than the distance between the first ring flange and the second ring flange opposing end surface.
In above-mentioned a kind of extrusion die that improves plastic pipe inner surface quality, the end face of described core offers groove and the screwed hole of concentric vertically successively, on the other end of the first ring flange, protrude vertically and be formed with a stage portion and be arranged on the threaded portion in stage portion, when threaded portion is tightened onto screwed hole, described stage portion can insert groove until the end face of the first ring flange pushes against the end face of core.
In above-mentioned a kind of extrusion die that improves plastic pipe inner surface quality, the external diameter of described the first ring flange equates with the external diameter of core.
In above-mentioned a kind of extrusion die that improves plastic pipe inner surface quality, the external diameter of described the second ring flange is less than the external diameter of the polytetrafluoroethylene (PTFE) collar.
In above-mentioned a kind of extrusion die that improves plastic pipe inner surface quality, the axial through hole that runs through top board that is no less than two that evenly offers of described top board, on described lower platen, offer fixing hole, described attachment screw is connected to top board on lower platen through through hole.
Adopt after said structure, the advantage that compared to the prior art the present invention had is:
1, the first annulus and the second annulus tightly fasten the polytetrafluoroethylene (PTFE) collar, can effectively prevent that the polytetrafluoroethylene (PTFE) collar is when extruded polyethylene tubing, produce distortion or loosening.
2, the external diameter of the first cylindrical portion and the second cylindrical portion all equates with the internal diameter of the polytetrafluoroethylene (PTFE) collar, the inwall of the polytetrafluoroethylene (PTFE) collar can abut on the outer peripheral face of the first cylindrical portion and the second cylindrical portion, can guarantee that the polytetrafluoroethylene (PTFE) collar can not be out of shape, displacement, the polyvinyl piping materials internal diameter of producing is stable, and surface quality is good.
3, annulus boss can insert in annular groove, guarantee good concentricity between top board and lower platen, and then the concentricity between the assurance polytetrafluoroethylene (PTFE) collar and top board and lower platen, threaded portion is tightened onto screwed hole can guarantee the concentricity between core and lower platen, coordinate each other precision, long service life.
4, attachment screw is connected to top board on lower platen through through hole, easy for installation, and debugging is simple.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present invention;
In figure: lower platen 10; The first cylindrical portion 11; The first ring flange 12; The first annulus 13; Annulus boss 14; Fixing hole 15; Stage portion 16; Threaded portion 17; Top board 20; The second cylindrical portion 21; The second ring flange 22; The second annulus 23; Annular groove 24; Through hole 25; The polytetrafluoroethylene (PTFE) collar 30; Core 40; Screwed hole 41; Groove 42; Attachment screw 50.
The specific embodiment
The following stated is only preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
Embodiment, as shown in Figure 1: a kind of extrusion die that improves plastic pipe inner surface quality, comprise core 40, top board 20, lower platen 10, the polytetrafluoroethylene (PTFE) collar 30 and attachment screw 50, the polytetrafluoroethylene (PTFE) collar 30 is revolving body, and its axial cross section is " work " font, the external diameter of the polytetrafluoroethylene (PTFE) collar 30 equates with the external diameter of core 40, lower platen 10 comprises the first cylindrical portion 11 and is arranged on first cylindrical portion 11 one end and radially protrudes the first ring flange 12 forming, the external diameter of the first ring flange 12 equates with the external diameter of core 40, one side end face of the first ring flange 12 is protruded vertically and is formed the first annulus 13, one side of the first annulus 13 clamping polytetrafluoroethylene (PTFE) collars 30, one end of the polytetrafluoroethylene (PTFE) collar 30 pushes against on the first ring flange 12, top board 20 comprises the second cylindrical portion 21 and is arranged on second cylindrical portion 21 one end and radially protrudes the second ring flange 22 forming, the external diameter of the second ring flange 22 is less than the external diameter of the polytetrafluoroethylene (PTFE) collar 30, the end face of the second ring flange 22 protrudes vertically and forms the second annulus 23, the second annulus 23 and the first annulus 13 are oppositely arranged and clamp the opposite side of the polytetrafluoroethylene (PTFE) collar 30, the other end of the polytetrafluoroethylene (PTFE) collar 30 pushes against on the second ring flange 22, the external diameter of the first cylindrical portion 11 and the second cylindrical portion 21 all equates with the internal diameter of the polytetrafluoroethylene (PTFE) collar 30, and the width of the polytetrafluoroethylene (PTFE) collar 30 is greater than the distance between the first ring flange 12 and the second ring flange 22 opposing end surfaces, the end of the first cylindrical portion 11 is protruded vertically and is formed annulus boss 14, the end of the second cylindrical portion 21 is recessed to form annular groove 24 vertically, annulus boss 14 can insert the internal diameter that annular groove 24 external diameter interior and annulus boss 14 equals annular groove 24.
The both ends of the surface of the polytetrafluoroethylene (PTFE) collar 30 and inside diameter surface are all supported by top board 20 or lower platen 10, only besides side face contacts with polyvinyl piping materials, integral rigidity is good, the polytetrafluoroethylene (PTFE) collar 30 dimensionally stables, thereby can guarantee to produce for a long time polyvinyl piping materials, make the inner surface of polyvinyl piping materials good, stable performance, long service life; The first annulus 13 is set and the second annulus 23 fastens the polytetrafluoroethylene (PTFE) collar 30, intensity is high, Stability Analysis of Structures; The external diameter of annulus boss 14 equals the internal diameter of annular groove 24, guarantees the concentricity between top board 20 and lower platen 10, plays the effect of guiding, and installation accuracy is high, and then guarantees the precision of polyvinyl piping materials; The width of the polytetrafluoroethylene (PTFE) collar 30 is greater than the distance between the first ring flange 12 and the second ring flange 22 opposing end surfaces, is conducive to adjust the size of the polytetrafluoroethylene (PTFE) collar 30 outer peripheral faces.
Axial several through holes running through 25 that evenly offers of top board 20, preferably adopting quantity is four through holes 25, on lower platen 10, offer fixing hole 15, thereby attachment screw 50 is affixed to fixing hole 15 through through hole 25 top board 20 is connected on lower platen 10, the end face of core 40 offers groove 42 and the screwed hole 41 of concentric vertically successively, on the other end of the first ring flange 12, protrude vertically and be formed with a stage portion 16 and be arranged on the threaded portion 17 in stage portion 16, when threaded portion 17 is tightened onto screwed hole 41, stage portion 16 can insert groove 42 until the end face of the first ring flange 12 pushes against the end face of core 40.By threaded portion 17, be tightened onto screwed hole 41, guaranteed the concentricity between core 40 and lower platen 10, the precision of whole extrusion die is improved, easy for installation.
Fitting operation step of the present invention: the threaded portion of lower platen 10 17 is tightened onto on the screwed hole 41 of core 40, stage portion 16 is inserted groove 42 until the first ring flange 12 of lower platen 10 pushes against the end face of core 40, the polytetrafluoroethylene (PTFE) collar 30 covers are set in the first cylindrical portion 11 and make the first annulus 13 stick into the polytetrafluoroethylene (PTFE) collar 30, inner surface by the second cylindrical portion 21 of top board 20 along the polytetrafluoroethylene (PTFE) collar 30 advances, until annulus boss 14 can insert in annular groove 24, the second annulus 23 is tipped the polytetrafluoroethylene (PTFE) collar 30 in, at the interior installation attachment screw 50 of through hole 25, according to the external diameter deformation of the polytetrafluoroethylene (PTFE) collar 30, adjust the pretightning force of attachment screw 50, this erection sequence also can first be installed pressing plate 20, lower platen 10 and the polytetrafluoroethylene (PTFE) collar 30, more mounted mould is installed on core 40.
The extrusion die of plastic pipe is widely used at present, and other structure and principle are same as the prior art, repeat no more here.
Claims (7)
1. an extrusion die that improves plastic pipe inner surface quality, it is characterized in that, comprise core, top board, lower platen, the polytetrafluoroethylene (PTFE) collar and attachment screw, the described polytetrafluoroethylene (PTFE) collar is revolving body, and its axial cross section is " work " font, described lower platen comprises the first cylindrical portion and is arranged on first cylindrical portion one end and radially protrudes the first ring flange forming, in a side end face of the first ring flange, protrude vertically and form the first annulus, one side of the described first annulus clamping polytetrafluoroethylene (PTFE) collar, described top board comprises the second cylindrical portion and is arranged on second cylindrical portion one end and radially protrudes the second ring flange forming, end face at the second ring flange protrudes formation the second annulus vertically, described the second annulus and the first annulus are oppositely arranged and clamp the opposite side of the polytetrafluoroethylene (PTFE) collar, the external diameter of described the first cylindrical portion and the second cylindrical portion all equates with the internal diameter of the polytetrafluoroethylene (PTFE) collar, described top board is connected by attachment screw with lower platen, described lower platen is affixed to core, the external diameter of the described polytetrafluoroethylene (PTFE) collar equates with the external diameter of core.
2. a kind of extrusion die that improves plastic pipe inner surface quality according to claim 1, it is characterized in that: the end of the first cylindrical portion is protruded vertically and formed annulus boss, the end of the second cylindrical portion is recessed to form annular groove vertically, and described annulus boss can insert in annular groove and the external diameter of annulus boss and the internal diameter of annular groove equate.
3. a kind of extrusion die that improves plastic pipe inner surface quality according to claim 1 and 2, is characterized in that: the width of the described polytetrafluoroethylene (PTFE) collar is greater than the distance between the first ring flange and the second ring flange opposing end surface.
4. a kind of extrusion die that improves plastic pipe inner surface quality according to claim 1 and 2, it is characterized in that: the end face of described core offers groove and the screwed hole of concentric vertically successively, on the other end of the first ring flange, protrude vertically and be formed with a stage portion and be arranged on the threaded portion in stage portion, when threaded portion is tightened onto screwed hole, described stage portion can insert groove until the end face of the first ring flange pushes against the end face of core.
5. a kind of extrusion die that improves plastic pipe inner surface quality according to claim 1 and 2, is characterized in that: the external diameter of described the first ring flange equates with the external diameter of core.
6. a kind of extrusion die that improves plastic pipe inner surface quality according to claim 1 and 2, is characterized in that: the external diameter of described the second ring flange is less than the external diameter of the polytetrafluoroethylene (PTFE) collar.
7. a kind of extrusion die that improves plastic pipe inner surface quality according to claim 1 and 2, it is characterized in that: the axial through hole that runs through top board that is no less than two that evenly offers of described top board, on described lower platen, offer fixing hole, described attachment screw is connected to top board on lower platen through through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240439.7U CN203792687U (en) | 2014-05-12 | 2014-05-12 | Extrusion die for improving plastic pipe inner surface quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420240439.7U CN203792687U (en) | 2014-05-12 | 2014-05-12 | Extrusion die for improving plastic pipe inner surface quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203792687U true CN203792687U (en) | 2014-08-27 |
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ID=51374951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420240439.7U Expired - Fee Related CN203792687U (en) | 2014-05-12 | 2014-05-12 | Extrusion die for improving plastic pipe inner surface quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203792687U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671385A (en) * | 2017-03-21 | 2017-05-17 | 上海长园电子材料有限公司 | Combined type air plug |
-
2014
- 2014-05-12 CN CN201420240439.7U patent/CN203792687U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106671385A (en) * | 2017-03-21 | 2017-05-17 | 上海长园电子材料有限公司 | Combined type air plug |
| CN106671385B (en) * | 2017-03-21 | 2024-02-02 | 上海长园电子材料有限公司 | Combined air plug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20140827 Termination date: 20160512 |