CN204123647U - Double screw extruder - Google Patents
Double screw extruder Download PDFInfo
- Publication number
- CN204123647U CN204123647U CN201420655093.7U CN201420655093U CN204123647U CN 204123647 U CN204123647 U CN 204123647U CN 201420655093 U CN201420655093 U CN 201420655093U CN 204123647 U CN204123647 U CN 204123647U
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- screw
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Abstract
The utility model discloses a kind of double screw extruder, comprise machine barrel and two screw units, two screw rods unit is all positioned at machine barrel, one section of screw unit engagement in two screw rods unit forms engaged section, and the end of engaged section is discharging opening, also comprise independent segment and filling section, the runner that two independence is through is divided in machine barrel, independent segment, filling section and engaged section set gradually along screw unit conveying side, two screw units of independent segment and filling section are non-engagement state, and the two screw rods unit of independent segment and filling section lays respectively in runner all separately, on machine barrel, full section is provided with heater, filling section is provided with charging point.The utility model independent segment and filling section are equivalent to two independent singe screw, in screw channel, the material of molten condition has good sealing effectiveness, avoid the loss of gas and the supercritical fluid added wherein, engaged section has material disperses immixture preferably, is applicable to polymer melt foaming processing.
Description
Technical field
The utility model belongs to the technical field of extrusion molding.
Background technology
Screw rod refers to that outer surface is cut spiral fluted cylinder or cut the circular cone of Conical Spiral Groove.Existing extruder usually can use screw-rod structure, makes material gradually become rectilinear motion with screw rod rotary motion, passes, and match with fuselage to heading, compression heat generation, softening stirring, mixed material.
Common screw extruder be two intermeshing double screw extruders for single screw extrusion machine and transportation section, mixing section.Single screw extrusion machine relies on the frictional force produced between material and machine barrel, and material is fed forward in the mode being full of screw channel.Double screw extruder is mainly in " ∞ " font cylindrical shell, in double screw extruder, material is full of screw channel mode with non-fully to be fed forward, there is the effect forcing material to be pushed forward, meanwhile, double screw extruder also has material in the engagement place of two screw rods and disperses immixture preferably.Twin-screw is divided into again non-engagement type and engagement type, and the two screw extruder of non-engagement type does not engage due to two screw rods, and the radial clearance between them is very large, there is larger leakage current.In the two screw extruder of engagement type, a screw rod will draw in back lash material, and another root screw rod will be released material from gap, makes material forward another screw rod to from a screw rod, in " ∞ " advance by shape.
Foaming instigates the inside of material to form crafters, the equipment that polymeric material extrusion foaming is conventional is double screw extruder, by twin-screw, the material of molten condition is promoted to advance, (often kind of material has a specific temperature, more than this temperature, increases pressure in any case by overcritical again, gaseous material can not liquefy, this temperature is exactly critical-temperature) gas and liquid filling in the material of molten condition, make gas nucleation in material, and become grow up to crafters.But because material melt is non-ly full of formula between double screw extruder two screw rods screw channel and machine barrel, there is gap, when annotating in the melt into postcritical gas and liquid, the fluid (i.e. gas and liquid) can not entered to annotating keeps sealing.Easily cause being mixed into of the loss of fluid and air, make the finished product of foaming not reach the requirement of design, make the defect rate of foaming cost higher.
Utility model content
The utility model provides a kind of double screw extruder, to solve the problem that existing double screw extruder exists gap when charging.Sealing good for Single screw extrusion and the excellent dispersion Combination of double screw extruder are integrated, provide a kind of efficient, excellent, be particularly suitable for material carry out foaming processing new structure extrude process equipment.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme: a kind of double screw extruder, comprise machine barrel and two screw units, two screw rods unit is all positioned at machine barrel, one section of screw unit engagement in two screw rods unit forms engaged section, and the end of engaged section is discharging opening, screw unit also comprises independent segment and filling section, the runner being divided into two independence through machine barrel by interlayer in machine barrel, independent segment, filling section and engaged section set gradually along screw unit throughput direction, two screw units of independent segment and filling section are non-engagement state, and the two screw rods unit of independent segment and filling section lays respectively in the through runner of machine barrel two independences all separately, machine barrel is provided with heater, filling section is provided with charging point, the discharging opening of charging point is positioned at the machine barrel of filling section.
Principle of the present utility model is as follows: the two screw rods unit of independent segment and filling section is positioned at the through runner of machine barrel two independences all separately and is equivalent to two independent singe screw, material melt is unlike in twin-screw in singe screw exists gap like that, singe screw forms the airtight space of a melt in runner, can seal preferably the material of annotated in screw channel gas or supercritical foaming fluid, but the scattered mixed performance of single screw extrusion machine is poor, be difficult to meet supercritical fluid is added injecting material melt after rapidly dispersion mixing and dissolving into melt.Engaged section is the two screw rods be meshed, and has the effect forcing material to be pushed forward, meanwhile, also has material and disperse immixture preferably, can mix fully various materials.
Compared with prior art, the utility model has the advantage of: the heater on independent segment can by heating material to molten condition.Independent segment and filling section are equivalent to two independent singe screw, can seal preferably the material of the molten condition in screw channel, avoid and add injection gas wherein and the loss of supercritical fluid.It is fluid of conveniently annotating that the machine barrel of filling section is provided with charging point.Engaged section has material disperses immixture preferably.The utility model makes foamed product more easily reach the requirement of design, reduces the defect rate of foamed product.
Further, the two screw rods unit of described engaged section is parallel double-screw or tapering twin-screw.As long as can realize two screw rods in engaged section to engage, parallel double-screw and tapering twin-screw can use.
Further, described screw unit is by being positioned at the first screw rod of independent segment, the second screw rod being positioned at filling section and the 3rd screw rod that is positioned at engaged section forms.This screw unit is detachable is three sections, when needs are changed, without integral replacing, only need change correspondent section.
Further, described screw unit is made up of the first screw rod being positioned at independent segment and filling section, the second screw rod of being positioned at engaged section.Independent segment is more with the identical feature of filling section, needing to change different screw rods, also very close to the requirement of independent segment and filling section, can change as a screw rod.
Further, described screw unit is made up of the screw body that two are positioned at independent segment, filling section and engaged section.Screw rod in screw unit is a whole bar, and better, high-speed rotation and the operating mode slowly run can well adapt to for globality and rigidity.
Further, the screw rod of described engaged section is provided with kneading block, can stir the material in engaged section screw channel, contributes to the uniform mixing strengthening engaged section place.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, technical solutions of the utility model are further illustrated:
Fig. 1 is the front view of the utility model double screw extruder embodiment 1.
Fig. 2 is the top view of the utility model double screw extruder embodiment 1.
Fig. 3 be along Figure 1A-A to sectional view.
Fig. 4 be along Figure 1B-B to sectional view.
Fig. 5 be along Fig. 1 C-C to sectional view.
detailed description of the invention
Reference numeral in Figure of description comprises: motor 1, deceleration distributor box 2, hopper 3, heater 4, machine barrel 5, charging point 6, small rack 7, base 8, screw rod 9, independent segment 10, filling section 11, engaged section 12.
Embodiment 1
As depicted in figs. 1 and 2, a kind of double screw extruder in the present embodiment, comprise machine barrel 5 and parallel double-screw 9, the runner being divided into two independence through by interlayer by one section of machine barrel 5 inside in machine barrel 5, two screw rods 9 is all positioned at machine barrel 5, comprises the independent segment 10, filling section 11 and the engaged section 12 that set gradually along screw rod 9 throughput direction (from left to right).As shown in Figure 3 and Figure 4, two screw rods 9 in independent segment 10 are non-engagement state, and two screw rods 9 lay respectively in the through runner of machine barrel 5 two independences, and on machine barrel, full section is provided with electric heater 4.Two bars in filling section 11 are also non-engagement state, and two screw rods 9 lay respectively in the through runner of machine barrel 5 two independences, and note section is provided with charging point 6, and the discharging opening of charging point 6 is positioned at the machine barrel 5 of filling section 11.As shown in Figure 5, in engaged section 12, two screw rods 9 are engagement, and two screw rods 9 in engaged section 12 are positioned at the runner that machine barrel 5 merges, and the end of engaged section 12 is discharging opening.
In addition, a kind of twin-screw 9 extruder of the present embodiment also comprises motor 1, deceleration distributor box 2, hopper 3 and small rack 7.
The function of above-mentioned parts is as follows:
Motor 1: system drive power is provided.Different motors 1 can be configured as required, to realize the adjustment of rotating speed.
Deceleration distributor box 2: realize reducing rotating speed with certain speed reducing ratio, and determine the rotation direction of two screw rods 9, namely two screw rods 9 can realize identical rotation direction as required, i.e. " rotating in same direction ", and different rotation direction, i.e. " incorgruous rotation ".Also realize the supporting of two screw rods 9 simultaneously.
Hopper 3: due to splendid attire raw material, bottom connects with through hole mode and machine barrel 5, makes the raw material of institute's splendid attire by its through hole input machine barrel 5, falls in the screw channel of screw rod 9.
Heater 4: can need to arrange different mode of heatings according to difference, what the present embodiment was selected is electrical heating.
Machine barrel 5: complete mass transport, melting, mixed function together with screw rod 9.
Charging point 6: for gas of annotating, liquid, or other material that can flow.
Small rack 7: for supporting machine barrel 5.
Base 8: the installation foundation part being whole machine.
Screw rod 9: the function realizing mass transport, mixing.
After machine startup, heater 4 heats, and motor 1 rotates, and its power is divided into two-way output shaft (belonging to part in deceleration distributor box 2) to export by deceleration distributor box 2, drives two screw rods 9 to rotate.The two-way of deceleration distributor box 2 exports rotation direction and can be designed to as required " in the same way " and " incorgruous ", thus drives two screw rods 9 to carry out " in the same way " or " incorgruous " rotation as required.The material (polymer raw material, raw-food material) of processing is needed to be added by hopper 3, drop in screw rod 9 screw channel in machine barrel 5, carry forward under two screw rods 9 and machine barrel 5 act on, carried at independent segment 10 respectively before this and heat in the process of conveying, this state is identical with two independent singe screw 9 extruders.In the process that material is carried forward, under external heat and shearing friction heat effect, temperature raises melting is gradually melt, and before charging point 6, melting is melt completely.At charging point 6 place, need the flowable material such as gas, supercritical fluid added to add in melt at this, the melt now before charging point 6 can form the sealing to additive (flowable such as gas, supercritical fluid material).Subsequently, the blend melt adding additive is delivered to twin-screw 9 region of engagement and carries out Homogeneous phase mixing and kneading, and this process can make the additive joined realize with melt disperseing, mixing and refinement.Mixed blend melt has fully been disperseed to export from machine barrel 5 output subsequently.Output can according to the different screen packs needing configuration different, parts such as shunting orifice plate and extrusion neck ring mold etc.
Material drops on screw channel after hopper 3 adds, first through independent segment 10, material is carried forward in the mode being entirely full of machine barrel 5 section, i.e. the carrying forward in the mode of " being full of completely " of material, with common singe screw 9 extruder, there is identical effect herein, the material melt of melting just can be full of conveying section completely, realizes sealing.Again through filling section 11, the complete melting of material before reaching filling section 11, forms melt.The interpolation phase (adding the small particle mutually for adding) of adding is needed at filling section 11, as gas, liquid, or other flowable materials adds in melt by charging point 6, now, the melt of upstream is to interpolation concrete sealing function mutually, can be called " the preposition sealing of melt ", then blend melt is carried toward engaged section 12.Finally enter engaged section 12, two screw rods 9 forms engagement, be in through " 8 " shape hole in machine barrel 5, together with the two strands of independent melt streams adding interpolation phase transported by independent segment 10 and filling section 11 two independent machine runners import entering after engaged section 12, under the twin-screw 9 of two engagements acts on, carry forward on the one hand, realize the multiple effects such as the dispersion of interpolation phase, mixing and kneading simultaneously, eventually pass the fully mixed melt of dispersion and export from the discharge end of low order end.And at engaged section 12 place, add the blend melt of adding phase and can realize extraordinary dispersion mixing in meshed double screw 9 effect again, take full advantage of the characteristic of twin-screw 9, overcome the feature of singe screw 9 scattered mixed performance not as good as twin-screw 9.
Embodiment 2
Difference from Example 1 is: the screw rod 9 in embodiment 1 is for all-in-one-piece; And the screw rod 9 in embodiment 2 is knockdown: by being positioned at the first screw rod 9 of independent segment 10, the second screw rod 9 being positioned at filling section 11 and the 3rd screw rod 9 that is positioned at engaged section 12 forms.
The benefit of such setting is: when can change different screw rods 9 according to the situation of mixing of materials, when the screw rod 9 of correspondent section is damaged, only need change that section of screw rod 9 be damaged, and without the screw rod 9 of other sections.
Embodiment 3
Difference from Example 1 is: the screw rod 9 formula syllogic in embodiment 2, and the screw rod 9 in embodiment 3 is two-part, is namely made up of the first screw rod 9 being positioned at independent segment 10 and filling section 11, the second screw rod 9 of being positioned at engaged section 12.
Because we find, independent segment 10 more with the identical feature of filling section 11 (as be all do not need engagement, and be all be positioned at the through runner of machine barrel 5 two independences), needing to change different screw rods 9, also very close to the requirement of independent segment 10 and filling section 11, can change as a screw rod 9.
For a person skilled in the art; under the prerequisite not departing from the utility model structure; can also make some distortion and improvement, these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.
Claims (6)
1. a double screw extruder, comprise machine barrel and two screw units, two screw rods unit is all positioned at machine barrel, one section of screw unit engagement in two screw rods unit forms engaged section, and the end of engaged section is discharging opening, it is characterized in that: screw unit also comprises independent segment and filling section, the runner being divided into two independence through machine barrel by interlayer in machine barrel, independent segment, filling section and engaged section set gradually along screw unit throughput direction, two screw units of independent segment and filling section are non-engagement state, and the two screw rods unit of independent segment and filling section lays respectively in the through runner of machine barrel two independences all separately, machine barrel is provided with heater, filling section is provided with charging point, the discharging opening of charging point is positioned at the machine barrel of filling section.
2. double screw extruder as claimed in claim 1, is characterized in that: the two screw rods unit of described engaged section is parallel double-screw or tapering twin-screw.
3. double screw extruder as claimed in claim 1, is characterized in that: described screw unit is by being positioned at the first screw rod of independent segment, the second screw rod being positioned at filling section and the 3rd screw rod that is positioned at engaged section forms.
4. double screw extruder as claimed in claim 1, is characterized in that: described screw unit is made up of the first screw rod being positioned at independent segment and filling section, the second screw rod of being positioned at engaged section.
5. double screw extruder as claimed in claim 1, is characterized in that: described screw unit is made up of the screw body that two are positioned at independent segment, filling section and engaged section.
6. double screw extruder as claimed in claim 1, is characterized in that: the screw rod of described engaged section is provided with kneading block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420655093.7U CN204123647U (en) | 2014-11-05 | 2014-11-05 | Double screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420655093.7U CN204123647U (en) | 2014-11-05 | 2014-11-05 | Double screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204123647U true CN204123647U (en) | 2015-01-28 |
Family
ID=52380034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420655093.7U Expired - Fee Related CN204123647U (en) | 2014-11-05 | 2014-11-05 | Double screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204123647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104309095A (en) * | 2014-11-05 | 2015-01-28 | 徐舒 | Double-screw extruder |
| CN112895372A (en) * | 2020-03-11 | 2021-06-04 | 陶怡君 | Continuous forming printing device for plastic extrusion pipe fitting |
-
2014
- 2014-11-05 CN CN201420655093.7U patent/CN204123647U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104309095A (en) * | 2014-11-05 | 2015-01-28 | 徐舒 | Double-screw extruder |
| CN112895372A (en) * | 2020-03-11 | 2021-06-04 | 陶怡君 | Continuous forming printing device for plastic extrusion pipe fitting |
| CN112895372B (en) * | 2020-03-11 | 2022-12-23 | 青岛海诺瓦型材制造有限公司 | Continuous forming printing device for plastic extrusion pipe fitting |
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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: 20150128 Termination date: 20161105 |