CN201633190U - Screw for triple screw extruder taking shape of Chinese character 'pin' - Google Patents
Screw for triple screw extruder taking shape of Chinese character 'pin' Download PDFInfo
- Publication number
- CN201633190U CN201633190U CN201020137417XU CN201020137417U CN201633190U CN 201633190 U CN201633190 U CN 201633190U CN 201020137417X U CN201020137417X U CN 201020137417XU CN 201020137417 U CN201020137417 U CN 201020137417U CN 201633190 U CN201633190 U CN 201633190U
- Authority
- CN
- China
- Prior art keywords
- screw
- screw rod
- pin
- type
- screw extruder
- Prior art date
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/53—Screws having a varying channel depth, e.g. varying the diameter of the longitudinal screw trunk
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/56—Screws having grooves or cavities other than the thread or the channel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/57—Screws provided with kneading disc-like elements, e.g. with oval-shaped elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/425—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders using three or more screws
- B29C48/43—Ring extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
- B29C48/52—Screws with an outer diameter varying along the longitudinal axis, e.g. for obtaining different thread clearance
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a screw structure, in particular to a screw for a triple screw extruder taking a shape of Chinese character 'pin'. Each screw of the extruder consists of a screw core shaft (2) and a screw element (1) sleeved on the screw core shaft. The screw elements (1) of the three screws are conjugated and meshed mutually. The shapes of the parts of the screw elements (1), which are meshed mutually, are same. The radius of an excircle formed by rotation of the screw elements (1) is a, the radius of an inner circle formed by the rotation of the screw elements (1) is b, and the ratio of a to b is between 1.3 and 2.15. After the technical scheme is adopted, with increase of the groove depth ratio, the superposition region of motion trails of outer diameters of the meshed screw elements on the three screws becomes bigger and bigger; even though a meshing sealed area disappears due to unsuitable tooth form design, the three screws makes materials in a central material region carry out forced flow exchange with outside materials, takes an active part in plasticizing and mixing and improves performance of finished product materials.
Description
Technical field
The utility model relates to a kind of screw-rod structure, especially a kind of screw rod that is used on the PIN-type three-screw extruder.
Background technology
At present, in the plastics field that is mixed, the general parallel double-screw extruder of Shi Yonging, its transmission is parallel two shaft types output.Along with the continuous development of modern plastic cement industry, the extensive use of especially high filling, high dispersive material and to the requirement of aspects such as low energy consumption, the rubber and plastic process equipment develops to diversification, multiscrew direction.Three screw rod extrusion systems have better shunting effect with respect to the traditional double screw rod and shear more frequently; promptly have better distribution and mix and disperse mixing; has bigger ventable interface area simultaneously; more help bleeding; make exhaust drop to minimum and have lower advantages such as energy consumption the influence of output; especially PIN-type three-screw extruder; the shearing number of times that material stands therein will be higher than twin-screw at double; each component is easy to obtain homogenising and micronize; fully exchange is mobile on a plurality of aspects in space for material; reach good plasticizing dispersion effect, reinforced and carry also highly stable.
Generally, the screw rod of PIN-type three-screw extruder all uses the triple thread element of common groove depth than (＜1.26).The triple thread element of this common groove depth ratio is when conjugation meshes, enclosed area, a center will appear, because the cylindrical that screwing element forms in the rotation engagement process can not cover this closed area, therefore, material can not be subjected to the shearing and the extruding of screwing element therein, therefore, the material of this center directly is extruded, seldom the Flow of Goods and Materials with this external world, zone exchanges, and melting effect is poor, has directly influenced the performance of finished product material.And the die pressing type of building of three traditional screw rod outlet terminals all adopts the derotation gear block in a large number, shears too by force in the time of build-up pressure, causes that material is aging to be decomposed or strand is cut short, and finished product material performance descends.
The utility model content
Be to solve the deficiencies in the prior art, the utility model provide a kind of can effectively eliminate the enclosed area, center so that realize to material realize fully mixing, exchange be used for screw rod on the PIN-type three-screw extruder.
For realizing above-mentioned utility model purpose, the screw rod that is used for PIN-type three-screw extruder of the present utility model, this screw rod is made up of screw mandrel (2) and the screwing element (1) that is sleeved on the screw mandrel, the engagement of described three screw flight elements (1) conjugation, and the part that is meshing with each other screwing element (1) shape is identical, the exradius that screwing element (1) rotation forms is a, and interior radius of circle is b, and 1.3＜a/b＜2.15.
As the further improvement of aforesaid way, described three screw rod centre-to-centre spacing are a+b.
Above-mentioned screw flight element (1) is the single-wire helix piece.
Above-mentioned screw flight element (1) also can be the single line gear block.
Above-mentioned screw flight element (1) also can be equilateral three-way eccentric gear block.
Above-mentioned screw flight element (1) can be the single line toothed disc equally.
In addition, three above-mentioned screw rod outlet terminals are fixedly connected with discharge pressure and set up section (7), and described discharge pressure is set up section (7) and screw coaxial, and the exradius value that its screw thread rotation forms is less than a.
Also can be provided with on the screw rod to cooperate and be provided with single line blocking-up piece (8) with screwing element (1).
Adopt technique scheme, its effect is as follows:
1, the ratio of the exradius a of three of extruder screw flight gear block rotation formation and interior radius of circle b (being the groove depth ratio) is in the 1.3-1.8 scope, can be along with the increase of groove depth ratio, the movement locus of the screwing element external diameter on three screw rods of engagement overlaps the zone and becomes increasing, even three screw rods are because the improper engagement enclosed area disappearance that causes of tooth Shape Design, make center material zone material and the exchange of extraneous material forced flow, play an active part in plasticizing with mixing, improved the performance of finished product material.The groove depth ratio is defined as 1.3-2.15, and its reason is as follows: when groove depth than less than 1.3 the time, screw channel is disappeared, output has not had yet; The groove depth ratio was greater than 2.15 o'clock, and promptly groove is too too dark, and screw mandrel will attenuate accordingly, and intensity reduces, easily fracture.
2, three screw rod centre-to-centre spacing are a+b, when guaranteeing the engagement stability of three screw rods, make the closed area complete obiteration of central engagement, have further improved mobile exchange and the effect that plastifies batch mixing.
3, behind three screw rods, be connected with the slightly little screw rod of external diameter and set up thread segment, when building pressure, kept making the performance of material better the suitable shear strength of material as discharge pressure, also ready for extruding pelletization.
4, screw rod is provided with to cooperate with screwing element and is provided with single line blocking-up piece, has played the effect of building pressure, because the existence of this blocking-up piece stops material here, has strengthened mixing effect.
Description of drawings
Below in conjunction with the drawings and the specific embodiments utility model is done further to describe in detail.
Fig. 1 is the triple thread element conjugation mesh schematic representation of existing PIN-type three-screw extruder screw rod;
Fig. 2 is the conjugation path of action schematic diagram of the utility model PIN-type three-screw extruder screw rod;
Fig. 3 is that the screwing element on the screw rod is the sectional top view of single-wire helix piece;
Fig. 4 is the side view of Fig. 3;
Different conditions center material region shape changed schematic diagram when Fig. 5 was three single-wire helix piece conjugation engagements;
Fig. 6 is that the screwing element on the screw rod is the sectional top view of single line gear block;
Fig. 7 is the side view of Fig. 6;
Fig. 8 is that the screwing element on the screw rod is the sectional top view of equilateral three-way eccentric gear block;
Fig. 9 is the side view of Fig. 8;
Figure 10 is that the screwing element on the bar is the sectional top view of single line toothed disc;
Figure 11 is the side view of Figure 10;
Figure 12 the utlity model has the screw-rod structure schematic diagram that pressure is set up thread segment;
Figure 13 is the sectional top view of the single line blocking-up piece that is provided with of screw rod of the present utility model;
Figure 14 is the side view of Figure 13.
The specific embodiment
By as can be known shown in Figure 1, the triple thread element of existing PIN-type three-screw extruder screw rod is in the conjugation engagement process, because each screw flight element is in conjugation engagement rotary course, can not realize comprehensive material zone is covered, and in its engagement, be formed centrally enclosed area, center f.
Embodiment one
By Fig. 3, as can be known shown in Figure 4, the screw rod that is used for PIN-type three-screw extruder of present embodiment, this screw rod is made up of screw mandrel 2 and the screwing element 1 that is sleeved on the screw mandrel 2, three screw flight element 1 conjugation engagements, and the part that is meshing with each other screwing element 1 shape is identical, the exradius that screwing element 1 rotation forms is a=3.0cm, and interior radius of circle is b=2cm, and three screw rod centre-to-centre spacing are 5cm.Screwing element 1 is the single-wire helix piece, this single-wire helix piece is that the center line rotation forms by having certain thickness single-wire helix sheet 3 with screw mandrel 2 axis, around forming, and transition wire a ' c ' is symmetrical arranged with b ' d ' end face of this single-wire helix sheet 3 by cylindrical circular arc a ' b ', interior round arc c ' d ' and the excessive line a ' c ', the b ' d ' that are connected in cylindrical circular arc a ' b ' and interior round arc c ' d '.
By as can be known shown in Figure 5, when installing, i.e. before screw rod does not rotate (0 ° time), the spiral piece position of three screw rods is identical, the round arc that promptly is positioned at two screw flight spin-blocks of top contacts simultaneously with the screw flight spin-block cylindrical circular arc that is positioned at the below, in the middle of three screw thread spin-blocks, form material district w, and the material district is the equilateral triangle state that is close to.When rotating 60 ° along with screw rod, the material district begins to be squeezed and diminishes, when rotating to 120 °, material district, center increases, and realizes the stretching to material, and the central area is sharply pushed again and dwindled during to 180 °, during to 240 °, the central area increase that stretches again is until returning to original state, finish the engagement feeding that rotates a circle.From above-mentioned narration as can be seen, the central area becomes regular and changes in screw rod rotates a circle, the central area material is played the extrusion stretching effect, under this effect, material flows out the central area and peripheral material carries out mixing, eliminate the enclosed area, center of common PIN-type three-screw extruder, made material better obtain shearing, mixing, reached better dispersion mixing and distribution mixed effect.
Therefore, by as can be known shown in Figure 2, three screw rods are in rotary course, and three cylindrical tracks of its formation all have intersection j, have avoided the appearance of enclosed area, center f.
Embodiment two
By Fig. 6, as can be known shown in Figure 7, be with the difference of embodiment one: screwing element 1 is the single line gear block, this single line gear block forms by having 4 rotations of certain thickness a plurality of (this embodiment is 7) single line meshing flake, the end surface shape of single line meshing flake 4 is identical with single-wire helix sheet 3 among the embodiment one, be single line meshing flake end face by cylindrical circular arc, interior round arc and the excessive line that is connected in cylindrical circular arc and interior round arc around forming, and transition wire is symmetrical arranged.At this moment, same the straight line at outer arc radius and interior round arc radius place is decided to be rotation datum line m, the single line meshing flake is a rotation centerline with the screw mandrel axis, each single line meshing flake previous single line meshing flake relatively separately carries out certain angle, and (this angle is the rotation datum line angle of adjacent two single line meshing flakes, present embodiment is 60 degree) the order rotation, form the single line gear block.
Embodiment three
By Fig. 8, as can be known shown in Figure 9, be with embodiment one difference: screwing element 1 is equilateral three-way eccentric gear block, this equilateral three-way eccentric gear block forms by having certain thickness a plurality of (this embodiment is 5) equilateral three-way eccentric meshing flake 5 rotations, the end surface shape of equilateral three-way eccentric meshing flake 5 has three angle points, connect by identical transition wire between each angle point, wherein an angle point forms point as spin-block cylindrical track, this angle point extends to transition wire through the axle center distance equals a+b, this is decided to be the rotation datum line apart from the place straight line, equilateral three-way eccentric meshing flake is a rotation centerline with the screw mandrel axis, each equilateral three-way eccentric meshing flake previous equilateral three-way eccentric meshing flake relatively separately carries out certain angle, and (this angle is the rotation datum line angle of adjacent two equilateral three-way eccentric meshing flakes, present embodiment is 60 degree) the order rotation, form equilateral three-way eccentric gear block.
Embodiment four
By Figure 10, as can be known shown in Figure 11, the screwing element 1 of present embodiment is the single line toothed disc, and basic identical with the structure of embodiment one, difference is: the single-wire helix sheet is provided with axial groove 6 in its cylindrical arc section.
Embodiment five
By as can be known shown in Figure 12, this three screw rods outlet terminal is fixedly connected with discharge pressure and sets up section 7, and described discharge pressure is set up section 7 and screw coaxial, and the exradius value that its screw thread rotation forms is less than a.
Embodiment six
By Figure 13, as can be known shown in Figure 14, in the present embodiment, screw rod is provided with to cooperate with screwing element 1 and is provided with single line blocking-up piece 8, being can be the combination of the single line blocking-up piece of the screwing element of the described shape of the various embodiments described above and present embodiment on the screw rod, also can be the combination that multi-form combination and the single line of present embodiment of the various embodiments described above blocked piece.The single line blocking-up of present embodiment is block-shaped basic identical with embodiment two, and unique difference is: the sequential angles that each single line meshing flake previous single line meshing flake relatively separately carries out rotates to be 120 degree.
The utility model is not limited to the above-mentioned specific embodiment; as long as its groove depth is than within the scope that the utility model relates to; no matter the screw-threaded engagement piece during concrete the application on the screw rod adopts which kind of shape, which kind of compound mode (only adopt the single thread spin-block as whole screw flight gear block, perhaps whole screw flight gear block adopts combination of single thread spin-block and triple thread spin-block and other shape screw thread spin-blocks or the like) all to drop among the utility model protection domain.
Claims (8)
1. screw rod that is used for PIN-type three-screw extruder, this screw rod is made up of screw mandrel (2) and the screwing element (1) that is sleeved on the screw mandrel, it is characterized in that: the engagement of described three screw flight elements (1) conjugation, and the part that is meshing with each other screwing element (1) shape is identical, the exradius that screwing element (1) rotation forms is a, interior radius of circle is b, and 1.3＜a/b＜2.15.
2. the screw rod that is used for PIN-type three-screw extruder according to claim 1 is characterized in that: described three screw rod centre-to-centre spacing are a+b.
3. the screw rod that is used for PIN-type three-screw extruder according to claim 1 and 2 is characterized in that: described screw flight element (1) is the single-wire helix piece.
4. the screw rod that is used for PIN-type three-screw extruder according to claim 1 and 2 is characterized in that: described screw flight element (1) is the single line gear block.
5. the screw rod that is used for PIN-type three-screw extruder according to claim 1 and 2 is characterized in that: described screw flight element (1) is equilateral three-way eccentric gear block.
6. the screw rod that is used for PIN-type three-screw extruder according to claim 1 and 2 is characterized in that: described screw flight element (1) is the single line toothed disc.
7. the screw rod that is used for PIN-type three-screw extruder according to claim 1 and 2, it is characterized in that: described three screw rod outlet terminals are fixedly connected with discharge pressure and set up section (7), described discharge pressure is set up section (7) and screw coaxial, and the exradius value that its screw thread rotation forms is less than a.
8. the screw rod that is used for PIN-type three-screw extruder according to claim 1 is characterized in that: described screw rod is provided with to cooperate with screwing element (1) and is provided with single line blocking-up piece (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020137417XU CN201633190U (en) | 2010-03-23 | 2010-03-23 | Screw for triple screw extruder taking shape of Chinese character 'pin' |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020137417XU CN201633190U (en) | 2010-03-23 | 2010-03-23 | Screw for triple screw extruder taking shape of Chinese character 'pin' |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201633190U true CN201633190U (en) | 2010-11-17 |
Family
ID=43077669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020137417XU Expired - Lifetime CN201633190U (en) | 2010-03-23 | 2010-03-23 | Screw for triple screw extruder taking shape of Chinese character 'pin' |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201633190U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786322A (en) * | 2010-03-23 | 2010-07-28 | 石家庄德倍隆科技有限公司 | Screw rods for PIN-type three-screw extruder |
| CN103862003A (en) * | 2014-02-25 | 2014-06-18 | 西安交通大学 | Triple screw stirring vibrating device for preparing semi-solid billets |
-
2010
- 2010-03-23 CN CN201020137417XU patent/CN201633190U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786322A (en) * | 2010-03-23 | 2010-07-28 | 石家庄德倍隆科技有限公司 | Screw rods for PIN-type three-screw extruder |
| CN101786322B (en) * | 2010-03-23 | 2012-11-28 | 石家庄德倍隆科技有限公司 | Screw rods for PIN-type three-screw extruder |
| CN103862003A (en) * | 2014-02-25 | 2014-06-18 | 西安交通大学 | Triple screw stirring vibrating device for preparing semi-solid billets |
| CN103862003B (en) * | 2014-02-25 | 2015-07-08 | 西安交通大学 | Triple screw stirring vibrating device for preparing semi-solid billets |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101117 Effective date of abandoning: 20130306 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20101117 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |