CN205148860U - Improve extra long extrusion die of PVC -U tubular product dichloromethane flooding performance - Google Patents
Improve extra long extrusion die of PVC -U tubular product dichloromethane flooding performance Download PDFInfo
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- CN205148860U CN205148860U CN201520938808.4U CN201520938808U CN205148860U CN 205148860 U CN205148860 U CN 205148860U CN 201520938808 U CN201520938808 U CN 201520938808U CN 205148860 U CN205148860 U CN 205148860U
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Abstract
The utility model discloses an improve extra long extrusion die of PVC -U tubular product dichloromethane flooding performance, including bush and plug, straight through hole segment of extension and taper hole section have been seted up to the bush, the straight through hole segment's of extension length is 7~9 with the aperture ratio: 5, the tapering of taper hole section is 30~35, the plug comprises straight shaft part of extension and cone, the length and the diameter of axle of the straight shaft part of extension compare for 7~9: 5, the tapering of cone is 30~35, the plug is installed in the inner chamber of bush. The utility model relates to an improve extra long extrusion die of PVC -U tubular product dichloromethane flooding performance, rational in infrastructure, the shaping section of extension bush and plug has increased the draw ratio, has strengthened the intensity of tubular product in weld mark department, improves tubular product mechanical properties greatly, is showing the performance of the dichloromethane flooding that has improved tubular product, and the plug of being convenient for is installed to the bush on, promotes the concentricity, reduces the wall thickness deviation of production in the tubular product production, has improved the homogenizing wall thickness nature of tubular product.
Description
[technical field]
The utility model relates to the technical field of tube extrusion machine head, particularly a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine.
[background technology]
At present, extruder generally applies to plastic tube extrusion processing and forming, as the important component part of extrusion molding, the rational Design on Plane of cross-head (extrusion die) is very important, all rule of thumb formula and coefficient are formulated in general extruder head design, its basic bore and its wall thickness according to being extruding pipe material, during extrusion die design, simply according to length of setting section and the compression section length of setting parameter mouth mould, simultaneously large in order to make material extrude output, drag reduction suffered by profiled section, make the length of mouthful die mandrel should not be longer, major diameter is smaller, in addition, the profiled section of mouth die mandrel is shorter, when mounted, concentricity controls not good, be not easy to regulate tube wall thickness, tube forming easily produces flexural deformation through calibration sleeve.
Traditional cross-head profiled section is shorter, plug major diameter is smaller, the resistance gone out at head is inadequate, so that back-pressure is lower, grog plasticizing effect is in an extruder bad, the weld mark that simultaneously melt exists melt after again converging after by current divider is eliminated remaining, stress at weld mark place is concentrated, intensity is herein lower, affect the intensity of tubing entirety, there is melt too small at port mould forming section pressure simultaneously, melt leakiness, final mechanical strength and the carrene saturating machine affecting tubing, therefore be necessary to propose a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine.
[utility model content]
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine is provided, it is smaller that it is intended to solve cross-head profiled section major diameter in prior art, intensity is lower, melt leakiness, affects the mechanical strength of tubing and the technical problem of carrene saturating machine.
For achieving the above object, the utility model proposes a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine, comprise mouthful mould and plug, described mouth mould offers and lengthens straight through hole section and taper hole section, the length of through hole section that described lengthening is straight is 7 ~ 9:5 with aperture ratio, the tapering of described taper hole section is 30 ~ 35 °, described plug is by lengthening straight shaft part and cone forms, the length of described lengthening is straight shaft part is 7 ~ 9:5 with diameter of axle ratio, the tapering of described cone is 30 ~ 35 °, and described plug is arranged in the inner chamber of mouthful mould.
As preferably, the length of through hole section that described lengthening is straight and aperture than with the length lengthening straight shaft part with the diameter of axle than identical.
As preferably, the tapering of described taper hole section is identical with the tapering of cone.
As preferably, through hole section that described lengthening is straight and lengthen the length of straight shaft part and the diameter of axle than being 7:5.
As preferably, through hole section that described lengthening is straight and lengthen the length of straight shaft part and the diameter of axle than being 8:5.
As preferably, through hole section that described lengthening is straight and lengthen the length of straight shaft part and the diameter of axle than being 9:5.
The beneficial effects of the utility model: compared with prior art, a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine that the utility model provides, rational in infrastructure, by lengthening the profiled section (flat segments) of mouth mould and plug, the draw ratio of profiled section is strengthened, by increasing shaping segment lenght size, original size is retained to compression section, melt is made to have larger resistance to form back-pressure entering profiled section through compression section, make material plasticizing even, the performance of flooding for the carrene of tubing is enhanced, simultaneously due to the profiled section of its lengthening, make melt after current divider, the melt converged can converge evenly, eliminate weld mark place stress to concentrate, enhance the intensity of tubing at weld mark place, greatly improve mechanical properties of tubular goods, the rational draw ratio of mouth die mandrel, outside not only the performance of producing product being increased significantly, simultaneously, installing of plug mouth mould, the concentricity of plug is strengthened, better with the fiting effect of mouth mould, reduce the wall thickness deviation produced during tubing is produced, for the adjustment of tube wall thickness and the control of evenness of wall thickness, there is good improvement.
Feature of the present utility model and advantage will be described in detail by reference to the accompanying drawings by embodiment.
[accompanying drawing explanation]
Fig. 1 is a kind of structural representation improving the lengthening extrusion die of PVC-U tubing carrene saturating machine of the utility model;
Fig. 2 is die geometry schematic diagram of the present utility model;
Fig. 3 is mandrel structure schematic diagram of the present utility model;
Fig. 4 is the structural representation of original extrusion die.
In figure: 1-mouth mould, 10-lengthen straight through hole section, 11-taper hole section, 2-plug, 20-lengthen straight shaft part, 21-cone.
[detailed description of the invention]
For making the purpose of this utility model, technical scheme and advantage clearly understand, below by accompanying drawing and embodiment, the utility model is further elaborated.But should be appreciated that, specific embodiment described herein, only in order to explain the utility model, is not limited to scope of the present utility model.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present utility model.
Consult Fig. 1, Fig. 2 and Fig. 3, the utility model embodiment provides a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine, comprise mouthful mould 1 and plug 2, described mouth mould 1 offers and lengthens straight through hole section 10 and taper hole section 11, the length of through hole section 10 that described lengthening is straight is 7 ~ 9:5 with aperture ratio, the tapering of described taper hole section 11 is 30 ~ 35 °, described plug 2 is made up of the straight shaft part 20 of lengthening and cone 21, the length of described lengthening is straight shaft part 20 is 7 ~ 9:5 with diameter of axle ratio, the tapering of described cone 21 is 30 ~ 35 °, described plug 2 is arranged in the inner chamber of mouthful mould 1.
Further, the length lengthening straight through hole section 10 and aperture than with the length lengthening straight shaft part 20 with the diameter of axle than identical.
Further, the tapering of taper hole section 11 is identical with the tapering of cone 21.
Embodiment one,
The length lengthening straight through hole section 10 and the straight shaft part 20 of lengthening is 7:5 with diameter of axle ratio.
Embodiment two,
The length lengthening straight through hole section 10 and the straight shaft part 20 of lengthening is 8:5 with diameter of axle ratio.
Embodiment three,
The length lengthening straight through hole section 10 and the straight shaft part 20 of lengthening is 9:5 with diameter of axle ratio.
By the lengthening extrusion die obtained by embodiment one to embodiment three, test with the extrusion die of original traditional draw ratio, comparative analysis finds, the homogeneous degree of the lengthening extrusion die of embodiment one to embodiment three, packing, mechanical property, the more traditional extrusion die do not lengthened of carrene saturating machine effect all improves significantly, and there is longer length of setting section due to embodiment one to embodiment three, when extrusion die is installed, easy concentricity adjusting, plug and mouth mould is made closely to be tending towards concentric circles, for the adjustment of wall thickness and the control of evenness of wall thickness, there is good improvement.
Consult Fig. 4, material is after entering current divider through extrusion screw rod, and forms of motion becomes parallel motion from screw, simultaneously, before entering the flat segments lengthening extrusion die, the material still section of the being compressed extruding of " ooze is strange " shape, there is unstable flow phenomenon in melt.By the lengthening of mouth die mandrel, melt is allowed to have time enough to change running status, reach the flowing of steady linear pattern, simultaneously, longer profiled section makes the macromolecule partial preliminary that strand is rolled up betwixt stretch, reduce die swelling effect, on the other hand, material through conveying section, after melt zone, temperature of charge rises, its temperature of carrying easily is assembled at cross-head, makes profiled section temperature higher than design temperature, by lengthening profiled section, the heat that material is carried is distributed in longer region, improves the phenomenon that temperature is assembled.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace or improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. one kind is improved the lengthening extrusion die of PVC-U tubing carrene saturating machine, comprise a mouthful mould (1) and plug (2), it is characterized in that: described mouth mould (1) offers and lengthens straight through hole section (10) and taper hole section (11), the length of through hole section that described lengthening is straight (10) is 7 ~ 9:5 with aperture ratio, the tapering of described taper hole section (11) is 30 ~ 35 °, described plug (2) is made up of the straight shaft part of lengthening (20) and cone (21), the length of described lengthening is straight shaft part (20) is 7 ~ 9:5 with diameter of axle ratio, the tapering of described cone (21) is 30 ~ 35 °, described plug (2) is arranged in the inner chamber of a mouthful mould (1).
2. a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine as claimed in claim 1, is characterized in that: the length of through hole section that described lengthening is straight (10) and aperture than with the length lengthening straight shaft part (20) with the diameter of axle than identical.
3. a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine as claimed in claim 1, is characterized in that: the tapering of described taper hole section (11) is identical with the tapering of cone (21).
4. a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine as claimed in claim 1, is characterized in that: the length of through hole section that described lengthening is straight (10) and the straight shaft part of lengthening (20) is 7:5 with diameter of axle ratio.
5. a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine as claimed in claim 1, is characterized in that: the length of through hole section that described lengthening is straight (10) and the straight shaft part of lengthening (20) is 8:5 with diameter of axle ratio.
6. a kind of lengthening extrusion die improving PVC-U tubing carrene saturating machine as claimed in claim 1, is characterized in that: the length of through hole section that described lengthening is straight (10) and the straight shaft part of lengthening (20) is 9:5 with diameter of axle ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520938808.4U CN205148860U (en) | 2015-11-23 | 2015-11-23 | Improve extra long extrusion die of PVC -U tubular product dichloromethane flooding performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520938808.4U CN205148860U (en) | 2015-11-23 | 2015-11-23 | Improve extra long extrusion die of PVC -U tubular product dichloromethane flooding performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205148860U true CN205148860U (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520938808.4U Active CN205148860U (en) | 2015-11-23 | 2015-11-23 | Improve extra long extrusion die of PVC -U tubular product dichloromethane flooding performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205148860U (en) |
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2015
- 2015-11-23 CN CN201520938808.4U patent/CN205148860U/en active Active
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| GR01 | Patent grant |