CN201913788U - Head runner structure of twin-screw extruder - Google Patents
Head runner structure of twin-screw extruder Download PDFInfo
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- CN201913788U CN201913788U CN2010205907794U CN201020590779U CN201913788U CN 201913788 U CN201913788 U CN 201913788U CN 2010205907794 U CN2010205907794 U CN 2010205907794U CN 201020590779 U CN201020590779 U CN 201020590779U CN 201913788 U CN201913788 U CN 201913788U
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- screw extruder
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- flow channel
- double screw
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Abstract
The utility model relates to a head runner structure of a twin-screw extruder, which belongs to the technical field of extrusion molding processing. The head runner structure consists of a transition section and a molding section. The number of head runners is a positive even number, the head runners are symmetrically arranged along the middle profile of a barrel vertically, the runners are also respectively uniformly arranged along the middle axes of a left screw and a right screw in the barrel of the twin-screw extruder, and the head runners are arranged along the middle profile in a shape of a rectangular array. The rear end of the transition section is directly connected with an outlet end of the barrel of the twin-screw extruder. The front end surface of the transition section is formed by that the rear end surface of the transition section gradually shrinks. The front end surface of the transition section is matched with the rear end surface of the molding section, and the front end surface of the molding section is of a structure of the cross section of an extrusion molded product. With the head runner structure, the twin-screw extruder can massively produce extrusion molding products. The head runner structure has the advantages of high yield, high efficiency, uniform extrusion speed, uniform product size, uniform quality, good product surface quality, no bubbles, good compactness, simple die structure and low cost.
Description
Technical field
The utility model relates to a kind of double screw extruder flow channel structure, belongs to the extrusion molding processing technique field.
Background technology
In extrusion molding process scale suitability for industrialized production, in order to finish certain output, to improve extrusion efficiency, people adopt a plurality of identical goods of an extrusion molding of head of multithread road structure usually.Can guarantee the extruded velocity uniformity of a plurality of goods, be the key of decision extruded product quality.
But because single screw rod and twin-screw extrusion molding process principle is different, in the twin-screw extrusion molding was processed, there was the uneven problem of flow velocity in the material of extruding from the multi manifold dies of routine.Conventional multi manifold dies is further divided into a plurality of runners afterwards with the extruder barrel coupling part the one section very long sprue that plays a transition role being arranged.The material of extruding from double screw extruder is in the flow process of the sprue of this section transition, because some full-bodied material itself is mobile relatively poor, material temperature is relatively more responsive to shearing, variations in temperature can cause the acute variation of material viscosity, caused the mobile inconsistent of material, the fast portion temperature of flow velocity further raises, and viscosity further reduces, and flow velocity is further accelerated; Extruded velocity when finally causing material to enter a plurality of goods of moulding in the runner differs greatly, and can not produce the goods of uniformity.In addition, the material of extruding also has problems such as bubble is mingled with, compactness is not enough; After the material extrusion molding, through product surface after a while be full of cracks and distortion take place easily, product surface is jagged, rough, and size and quality all do not reach requirement.Therefore, conventional flow channel structure can't guarantee the uniformity of the extruded velocity of multiple products to have restricted the application of double screw extruder in technical scale production.
The utility model content
The purpose of this utility model is multi manifold dies extruded material flow velocity inequality, the product defects problem of using at existing double screw extruder how, proposes a kind of double screw extruder flow channel structure, and this structure is a plurality of goods of extrusion molding evenly.
The purpose of this utility model is achieved through the following technical solutions.
A kind of double screw extruder flow channel structure of the present utility model, this flow channel structure adopts the version of combined flow channel, directly the material mean allocation is arrived in a plurality of runners at double screw extruder machine barrel front end screw head position, material is finished transition, homogenizing, compression, moulding respectively in each runner, thereby guarantee the uniformity of material flow in each runner, according to the size of the size of extrusion moulding product and the requirement of output, a positive even numbers runner can be set; This flow channel structure is made up of changeover portion and profiled section; Flow channel quantity is that positive even numbers is individual, flow channel distributes along profile left-right symmetry in the machine barrel, the runner of middle profile the right and left evenly distributes along the axis of the right and left screw rod in the double screw extruder machine barrel respectively again, the rectangular array arrangement of profile in all flow channels edges.The changeover portion rear end directly is connected with the double screw extruder machine barrel port of export, and the total outer edge of changeover portion rear end face matches with the outlet edge of the staggered Double Circle of double screw extruder machine barrel front end; The changeover portion front end face is to dwindle transition gradually by the changeover portion rear end face to form, and the changeover portion front end face is equal-sized circle, and is corresponding one by one with the changeover portion rear end face, and quantity equates, radial position is identical.Changeover portion plays the effect of shunting, transition to material.Changeover portion front end face and profiled section rear end face are complementary, and the profiled section front end face is the cross-sectional structure of extrusion moulding product.
Above-mentioned flow channel structure can increase in fillter section, compression section, the diversion section one section, two sections or three sections according to the demand of the difference of material and goods between changeover portion and profiled section.Fillter section is a plurality of tiny cylinders or cone cavity structure, and effect is to make material become rectilinear motion by rotatablely moving, and stops the material of impurity and not plasticizing to pass through and increase materials flow back pressure, makes goods more closely knit; The compression section is a plurality of cone cavity structures, has the effect of compression, density; Diversion section is the cone cavity structure, mainly plays water conservancy diversion.
The parts of realizing above-mentioned flow channel structure comprise transition body, filter, compressive plate, guide hole plate, mould and mould.The machine-shaping on the transition body of changeover portion runner is processed with a plurality of tiny cylinders or conical eyelet on the filter, bear the fillter section runner, compressive plate is born style channel of compressing section, the guide hole plate is born the diversion section runner, and mould is born the profiled section runner, and mould plays supporting mould.Filter, compressive plate and guide hole plate can be made a whole plate with corresponding flow passage structure respectively, are mounted between transition body and the mould by bolt; Also can make a plurality of widgets respectively, be installed in successively in the installing hole of mould respectively according to product amounts.After all parts connect as one, transition body rear end face is connected with the machine barrel front end face.
Molding process is as follows: processing materials in the double screw extruder machine barrel through after twin-screw mixing, arrive the screw head position of machine barrel front end, directly enter the changeover portion of flow channel, after transition body shunting transition, enter filter, arrive compressive plate behind a plurality of tiny filtration eyelets of material process filter, the stage of experience compression, density; Arrive the guide hole plate again, the guide hole plate arrives material diversion in mould; Enter the profiled section of mould at last, according to the goods of the flow channel shape moulding positive even numbers uniformity of mould.
Beneficial effect
The utility model can be realized double screw extruder extrusion moulding product in batches, and output is big, efficient is high; Extruded velocity is even, all even quality of product size is even; Products surface quality is good, and no bubble, compactness are good; Mould structure is simple, and cost is low.
Description of drawings
Fig. 1 is the structural representation of facing of the present utility model;
Fig. 2 is a perspective view of the present utility model;
Fig. 3 is the parts assembling schematic diagram of the utility model embodiment 1;
Fig. 4 is the parts assembling schematic diagram of the utility model embodiment 2;
Wherein, 1-changeover portion, 2-fillter section, 3-compression section, the 4-diversion section, 5-profiled section, 6-machine barrel, the 7-screw rod, 8-screw head, 9-transition body, the 10-filter, 11-compressive plate, 12-guide hole plate, the 13-mould, 14-mould, 15-changeover portion front end face, 16-changeover portion rear end face, 17-axis, profile among the 18-.
The specific embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Embodiment
Double screw extruder flow channel structure with eight same article of one-shot forming processing is that embodiment describes below.
The flow channel structure comprises changeover portion 1, fillter section 2, compression section 3, diversion section 4 and profiled section 5, as depicted in figs. 1 and 2, flow channel quantity is eight, flow channel distributes along middle profile 18 left-right symmetry of the machine barrel 6 of double screw extruder, the runner of middle profile 18 the right and lefts evenly distributes along the axis 17 of the right and left screw rod 7 in the machine barrel 6 respectively again, profile 18 rectangular array arrangements in all flow channels edges.Changeover portion 2 rear ends directly are connected with machine barrel 6 ports of export, and the total outer edge of the changeover portion rear end face of flow channel 16 matches with the outlet edge of the staggered Double Circle of double screw extruder machine barrel 6 front ends; Changeover portion front end face 15 is to dwindle transition gradually by changeover portion rear end face 16 to form, changeover portion front end face 15 is equal-sized eight circles, corresponding one by one with changeover portion rear end face 16, quantity equates, radial position is identical, fillter section 2 is the cylindrical runner structure of 1mm for a plurality of diameters, compression section 3 is a plurality of cone cavity structures, and diversion section 4 is the cone cavity structure.Profiled section 5 front end faces are the cross-sectional structure of extrusion moulding product.
Head part comprises transition body 9, filter 10, compressive plate 11, guide hole plate 12, mould 13 and mould 14.The machine-shaping on transition body 9 of changeover portion 1 runner; Be processed with the cylindrical orifice that a plurality of diameters are 1mm on the filter 10, bear fillter section 2 runners; Compressive plate 11 is born compression section 3 runners; Guide hole plate 12 is born diversion section 4 runners; Mould 13 is born profiled section 5 runners; Mould 14 plays supporting mould 13.Filter 10, compressive plate 11 and guide hole plate 12 are made a whole plate with corresponding flow passage structure respectively, are mounted between transition body 9 and the mould 14, as shown in Figure 3 by bolt; After all parts connect as one, the rear end face of transition body 9 is connected with machine barrel 6 front end faces.
Molding process is as follows: processing materials through after twin-screw 7 mixing, arrives screw head 8 positions of machine barrel 6 front ends in double screw extruder machine barrel 6; Directly enter the changeover portion 1 of flow channel, after the 9 shunting transition of transition body, enter filter 10, arrive compressive plate 11 behind the filtration eyelet that more than 10 diameter of material process filter is 1mm, the stage of experience compression, density; Arrive guide hole plate 12 again, guide hole plate 12 arrives material diversion in mould 13; Enter the profiled section 5 of mould 13 at last, according to the goods of eight uniformities of flow channel shape moulding of mould 13.
With embodiment 1, wherein different is: filter 10, compressive plate 11 and guide hole plate 12 are made eight widgets respectively, and totally two ten four widgets are installed in the installing hole of mould 14, as shown in Figure 4 respectively successively.
Claims (9)
1. double screw extruder flow channel structure, it is characterized in that: this flow channel structure is made up of changeover portion (1) and profiled section (5); Flow channel quantity is that positive even numbers is individual, flow channel distributes along profile left-right symmetry in the machine barrel, the runner of middle profile the right and left evenly distributes along the axis of the right and left screw rod in the double screw extruder machine barrel respectively again, the rectangular array arrangement of profile in all flow channels edges;
Changeover portion (1) rear end directly is connected with the double screw extruder machine barrel port of export, and the total outer edge of changeover portion rear end face (16) matches with the outlet edge of the staggered Double Circle of double screw extruder machine barrel front end; Changeover portion front end face (15) is to dwindle transition gradually by changeover portion rear end face (16) to form, and changeover portion front end face (15) is equal-sized circle, and is corresponding one by one with changeover portion rear end face (16), and quantity equates, radial position is identical; Changeover portion front end face (15) is complementary with profiled section (5) rear end face, and profiled section (5) front end face is the cross-sectional structure of extrusion moulding product.
2. a kind of double screw extruder flow channel structure according to claim 1, it is characterized in that: this flow channel structure increases by a section, two sections or three sections in fillter section (2), compression section (3), the diversion section (4) between changeover portion (1) and profiled section (5);
Fillter section (2) is cylinder or cone cavity structure, and compression section (3) are the cone cavity structure, and diversion section (4) is the cone cavity structure.
3. a kind of double screw extruder flow channel structure according to claim 1 is characterized in that: changeover portion (1) is gone up machine-shaping at transition body (9).
4. a kind of double screw extruder flow channel structure according to claim 2 is characterized in that: fillter section (2) is gone up machine-shaping at filter (10), is processed with cylinder or conical eyelet on the filter (10).
5. a kind of double screw extruder flow channel structure according to claim 2 is characterized in that: compression section (3) go up machine-shaping at compressive plate (11).
6. a kind of double screw extruder flow channel structure according to claim 2 is characterized in that: diversion section (4) is gone up machine-shaping at guide hole plate (12).
7. a kind of double screw extruder flow channel structure according to claim 1 is characterized in that: profiled section (5) is gone up machine-shaping at mould (13), and mould (13) is supported by mould (14).
8. according to arbitrary described a kind of double screw extruder flow channel structure in the claim 3,4,5,6 or 7, it is characterized in that: filter (10), compressive plate (11) and guide hole plate (12) are made a whole plate with corresponding flow passage structure respectively, are mounted between transition body (9) and the mould (14) by bolt.
9. according to arbitrary described a kind of double screw extruder flow channel structure in the claim 3,4,5,6 or 7, it is characterized in that: filter (10), compressive plate (11) and guide hole plate (12) are made a plurality of widgets respectively, are installed in successively respectively in the mould (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205907794U CN201913788U (en) | 2010-10-29 | 2010-10-29 | Head runner structure of twin-screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205907794U CN201913788U (en) | 2010-10-29 | 2010-10-29 | Head runner structure of twin-screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201913788U true CN201913788U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205907794U Expired - Fee Related CN201913788U (en) | 2010-10-29 | 2010-10-29 | Head runner structure of twin-screw extruder |
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| Country | Link |
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| CN (1) | CN201913788U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104448491A (en) * | 2014-12-09 | 2015-03-25 | 宁波大学 | Extrusion molding method of graphene modified polyethylene high-strength composite thin products |
-
2010
- 2010-10-29 CN CN2010205907794U patent/CN201913788U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104448491A (en) * | 2014-12-09 | 2015-03-25 | 宁波大学 | Extrusion molding method of graphene modified polyethylene high-strength composite thin products |
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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: 20110803 Termination date: 20111029 |