CN203726779U - Corrugated screw rod for injection molding machine - Google Patents
Corrugated screw rod for injection molding machine Download PDFInfo
- Publication number
- CN203726779U CN203726779U CN201320861785.2U CN201320861785U CN203726779U CN 203726779 U CN203726779 U CN 203726779U CN 201320861785 U CN201320861785 U CN 201320861785U CN 203726779 U CN203726779 U CN 203726779U
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- China
- Prior art keywords
- screw rod
- rod body
- section
- screw
- ripple
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- 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 - Lifetime
Links
- 238000001746 injection moulding Methods 0.000 title abstract description 3
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 abstract description 8
- 229920003023 plastic Polymers 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 230000008859 change Effects 0.000 description 8
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010023126 Jaundice Diseases 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000002990 reinforced plastic Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a corrugated screw rod for an injection molding machine, in particular to a variable-depth dual-corrugated screw rod. The corrugated screw rod comprises a screw rod body and spiral screw arrises which are arranged on the surface of the screw rod body, wherein the screw rod body is provided with two conical sections, one conical section is arranged at the front half part of the screw rod body, the diameter of the conical section of the screw rod body is gradually reduced along the moving direction of a material, the gap between the screw arrises is gradually reduced, and the depth of a screw groove is gradually increased; the other conical section is arranged on the tail section of the screw rod body, the diameter of the conical section of the screw rod body is gradually increased along the moving direction of the material, the gap between the screw arrises is gradually increased, and the depth of the screw groove is gradually reduced. A plurality of conical runners are formed on the transitional section and corrugated section of the screw rod, so that the stretching effect produced by the conical runners can be effectively utilized, the stretching effect and the shear effect are strong, a mixing effect on different materials is strong, and the corrugated screw rod can be used for machining plastics and composite systems which are difficult to machine by an ordinary screw rod.
Description
Technical field
The utility model relates to a kind of plastic molding machinery plasticized screw, specifically refers to a kind of screw rod that deepens double wave shape.
Background technology
Screw rod is the crucial Plasticized component of plastics processing plant equipment, and the height of the quality of screw design quality on plastics processing process productivity ratio and the quality of shaped article quality have great impact.Each research institutions and enterprise drop into a large amount of manpowers, financial resources and material resources improves common screw architecture advances and performance, in succession develops various new screw rod, as separating screw rod, barrier screw, bypass type screw rod, bend flow channel type screw rod etc.
Wavy screw rod is a kind of bend flow channel type screw rod, and its change groove depth structure that is wave change by changing spiral groove depth substitutes dark equidistant screw channel structure such as traditional grade.Can design various, function wavy screw rod widely by changing wave trough number, wave trough cross sectional shape, wave trough cycle period and the methods such as secondary spiral shell rib being set, such as single ripple screw rod, double wave screw rod, many ripples screw rod etc.According to the difference of forming machine apparatus and process, there are again various special wavy screw rods, such as double wave extrusion screw rod, double wave injection screw etc.At present, the project organization of wavy screw rod is mainly to set up wavy mixing elements in the compression section of three-stage screw, screw compression section root footpath is less than root footpath, transportation section, between two sections, the root footpath transient period is about 1/4 pitch, sharply change and cause material to gather, the material gathering often decomposes because the temperature rise of being heated is for a long time too high.Therefore, need to existing wavy screw rod be improved and be optimized, thereby improve the plasticizing capacity of wavy screw rod.
Utility model content
Therefore, the wavy screw rod that provides a kind of Novel injection moulding machine to use is provided the purpose of this utility model, to solve wavy screw rod transition region no backup and can not cause material hot-spot to be decomposed.
Above-mentioned purpose is perfect by the following technical programs.
The wavy screw rod that a kind of injection machine is used, comprise screw rod body and be located at the spiral spiral shell rib of screw rod body surface, described screw rod body comprises again leading portion, first half section, linkage section and rear, the first half section of described screw rod body and the shape of afterbody are coniform, first half section is cone shape screw rod body diameter and diminishes gradually along material moving direction diameter, spiral shell rib spacing diminishes gradually, and it is large that spiral groove depth becomes gradually;
Rear is cone shape screw rod body diameter and becomes gradually greatly along material moving direction diameter, and spiral shell rib spacing becomes greatly gradually, and spiral groove depth diminishes gradually;
The screw rod body of linkage section is between the screw rod body between coniform two sections of shapes, and the screw rod body surface of linkage section is also provided with ripple and lower ripple, and alternately, upper ripple and lower wave phase are poor is 180 ° for upper ripple and lower ripple.
Technique scheme also can be made to the following further improve.
The leading portion diameter of described screw rod body is identical, and spiral shell rib spacing is identical, and spiral groove depth is identical.
Between described upper ripple and lower ripple, also can establish again secondary spiral shell rib.
The utlity model has following advantage:
Deepen double wave screw rod based on elongational flow principle design, the tapered runner that wavy screw channel forms is conducive to material and produces elongational flow, material melt is subject to strong shear action and sets up certain pressure at crest place, flow through after crest and enter back taper runner, melt pressure is released herein, and the material that flows into adjacent trough from rising crest stands continuous immixture.
Screw rod deepens displacement changeover portion and has effectively avoided screw channel cross section of fluid channel to change suddenly the local buildup causing, and efficiently solves plastic melt local heating and decomposes problems such as producing jaundice blackout, thereby greatly improved the plasticizing capacity of screw rod.
Deepen double wave screw rod and formed multiple tapered runners screw rod changeover portion and wavy section, the stretching action that effectively utilizes tapered runner to produce, thereby there is stronger stretching action and shear action, different material is had to stronger mixed milling effect, can be used to process the more unmanageable plastics of general screw rod and compound system.
Brief description of the drawings
Fig. 1 is for deepening double wave screw-rod structure schematic diagram.
Fig. 2 is partial view A schematic diagram.
Fig. 3 is partial view B schematic diagram.
Fig. 4 is cross section view a-a schematic diagram.
Detailed description of the invention
below in conjunction with drawings and Examples, the utility model is described in further detail.
1 to 4, Yi Zhongbo by reference to the accompanying drawingsshape screw rod, comprises screw rod body, is located at the helical form spiral shell rib of screw rod body surface, and screw rod body forms by three sections: transportation section 10, compression section 20 and metering section 30, spiral shell rib the dark equidistant section 50 such as is divided into and deepens displacement section 51.Screw rod body is located in barrel 8, material under the revolving force effect of screw rod body in the interior movement of barrel 8.
As shown in Figures 1 to 4, the diameter of the screw rod body of transportation section 10 front ends 11 is D1, and spiral shell rib spacing is P1, and spiral groove depth is d1, and their size is all constant.The diameter of the screw rod body of 10 rear ends 12, transportation section is reduced to D2 by D1, and spiral groove depth increases to d2 by d1, and spiral shell rib spacing is decreased to P4 by P2, makes 10 rear ends 12, transportation section be reverse tapered shapes.
The screw rod body surface of compression section 22 front ends 21 is also provided with ripple 6 and lower ripple 7, and upper ripple 6 is alternately with lower ripple 7, and both phase differences are 180 °, and upper ripple, lower wave width and identical length etc., and the crest of upper ripple, lower ripple and trough are all adjacent.Certainly also can change upper ripple, lower wavelength degree and width, or between upper ripple, lower ripple, design a secondary spiral shell rib (not shown), the spiral shell rib width of secondary spiral shell rib is less than the spiral shell rib width e of spiral shell rib.
22 rear ends 22, compression section are conical gradual change structure, and screw rod body diameter is increased to D3 by D2, and spiral groove depth is decreased to d3 by d2, and spiral shell rib spacing increases to P7 by P5.
The screw rod body diameter D3 of metering section 30, spiral shell rib spacing is P1, their sizes are all constant.
The screw channel that deepens displacement spiral shell prismatic one-tenth of tapering transition section has slowed down the unexpected variation in screw rod root footpath, can avoid material to gather and cross the plasticizing problems such as thermal decomposition.
The double wave screw rod that deepens of the present utility model is upper ripple 6 and lower ripple 7 alternately to be realized compression section design is several on the basis of said structure.As shown in Figure 4, upper and lower waveform is oval, ellipse short shaft is equal to or slightly less than two waveband root footpath D2, transverse is less than spiral shell rib external diameter, can change waveform shape by control ellipse long and short shaft and form different taper drawing runners, thereby change the melting characteristic that wavy screw channel Changing Pattern adapts to different material.
The double wave screw rod that deepens described in the utility model, its double wave structure position in screw rod is not changeless, it is affected by the melting characteristic of plastics.In the time that plastic melt stickiness is large, its viscous resistance is large, and poor fluidity should reduce the length of two waveband, and wavy section should be designed in compression section end or design at metering section; When plastics stickiness hour, its viscous resistance is little, and mobility is strong, can increase the length of wavy section, now wavy section can be designed at transportation section end, whole compression section and metering section, can also, at the wavy section of secondary spiral shell rib of design, carry out the centrifugation of reinforced plastics melt solid-liquid two-phase.
Claims (3)
1. the wavy screw rod that injection machine is used, comprise screw rod body and be located at the spiral spiral shell rib of screw rod body surface, described screw rod body comprises again leading portion, first half section, linkage section and rear, it is characterized in that: the first half section of described screw rod body and the shape of afterbody are coniform, first half section is cone shape screw rod body diameter and diminishes gradually along material moving direction diameter, spiral shell rib spacing diminishes gradually, and it is large that spiral groove depth becomes gradually;
Rear is cone shape screw rod body diameter and becomes gradually greatly along material moving direction diameter, and spiral shell rib spacing becomes greatly gradually, and spiral groove depth diminishes gradually;
The screw rod body of linkage section is between the screw rod body between coniform two sections of shapes, and the screw rod body surface of linkage section is also provided with ripple and lower ripple, and alternately, upper ripple and lower wave phase are poor is 180 ° for upper ripple and lower ripple.
2. the wavy screw rod that injection machine is used according to claim 1, is characterized in that: the leading portion diameter of described screw rod body is identical, and spiral shell rib spacing is identical, and spiral groove depth is identical.
3. the wavy screw rod that injection machine is used according to claim 1, is characterized in that: between described upper ripple and lower ripple, also can establish secondary spiral shell rib again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861785.2U CN203726779U (en) | 2013-12-25 | 2013-12-25 | Corrugated screw rod for injection molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320861785.2U CN203726779U (en) | 2013-12-25 | 2013-12-25 | Corrugated screw rod for injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203726779U true CN203726779U (en) | 2014-07-23 |
Family
ID=51196883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320861785.2U Expired - Lifetime CN203726779U (en) | 2013-12-25 | 2013-12-25 | Corrugated screw rod for injection molding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203726779U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103431A (en) * | 2019-05-31 | 2019-08-09 | 广东伊之密精密注压科技有限公司 | A kind of plastic-injection moulding machine and its injection screw |
| CN115485121A (en) * | 2020-04-28 | 2022-12-16 | 克劳斯玛菲科技有限公司 | Plasticizing unit |
| CN116330617A (en) * | 2023-04-12 | 2023-06-27 | 江西同益高分子材料科技有限公司 | screw for extruder |
-
2013
- 2013-12-25 CN CN201320861785.2U patent/CN203726779U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110103431A (en) * | 2019-05-31 | 2019-08-09 | 广东伊之密精密注压科技有限公司 | A kind of plastic-injection moulding machine and its injection screw |
| CN115485121A (en) * | 2020-04-28 | 2022-12-16 | 克劳斯玛菲科技有限公司 | Plasticizing unit |
| CN116330617A (en) * | 2023-04-12 | 2023-06-27 | 江西同益高分子材料科技有限公司 | screw for extruder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140723 |
|
| CX01 | Expiry of patent term |