CN212097383U - Extruder barrel of flat double screw - Google Patents
Extruder barrel of flat double screw Download PDFInfo
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- CN212097383U CN212097383U CN202020173055.3U CN202020173055U CN212097383U CN 212097383 U CN212097383 U CN 212097383U CN 202020173055 U CN202020173055 U CN 202020173055U CN 212097383 U CN212097383 U CN 212097383U
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- 230000008018 melting Effects 0.000 claims abstract description 31
- 238000002844 melting Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims description 12
- 238000005121 nitriding Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 abstract 1
- 238000009750 centrifugal casting Methods 0.000 description 6
- 238000001746 injection moulding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model provides a flat twin-screw extruder barrel, which comprises a cylindrical shel, the ratio of the length of barrel and the diameter of barrel is 12 ~ 18, parallel through-hole inner wall is 1 ~ 4mm with the minimum distance that stretches into the flat twin-screw spiral arris surface in the parallel through-hole, the lateral wall thickness of two parallel through-holes is 20 ~ 30mm, the barrel wall thickness of two parallel through-hole junctions is 90 ~ 100mm, and be provided with the exhaust cavity on the corresponding barrel outer wall of melting section with ejection of compact section junction with flat twin-screw, it has exhaust through-hole to distribute on the bottom surface of exhaust cavity, exhaust through-hole is linked together with parallel through-hole, the inner wall surface of two parallel through-hole is provided with the one deck nitrided layer, the thickness of nitrided layer is 0.5 ~. The advantages are that: by matching with the flat double screws, the air in the materials can be effectively extruded, and the material particles are fully eliminated, so that the materials become more compact and more fully plasticized.
Description
Technical Field
The utility model relates to a machine section of thick bamboo preparation technical field especially indicates a flat twin-screw extruder barrel.
Background
The current chinese utility model patent of application number CN201620137004.9 name "a flat twin-cylinder" discloses a flat twin-cylinder that long service life, satisfied centrifugation were pour, including parent and injection molding, the injection molding splices into diplopore "horizontal 8 word" structure by 2 drums, the parent is both ends open-ended drum structure, inlay in the parent has the centrifugal casting barrel, the centrifugal casting barrel is both ends open-ended drum structure, the external diameter of centrifugal casting barrel equals the internal diameter of parent, the inboard of centrifugal casting barrel is arranged in to the injection molding, the both ends of parent are provided with the link. A centrifugal casting cylinder is embedded in the outer ring of the injection molding body and the inner ring of the matrix, so that the flat double-cylinder can meet the requirement of centrifugal casting, and the service life is prolonged. However, the material processing effect of the flat twin-cylinder is still not ideal enough, so the structure of the flat twin-cylinder needs to be further improved.
Disclosure of Invention
The utility model aims to solve the technical problem that to above-mentioned prior art current situation and provide an energy-conserving high efficiency, material treatment efficiency is high, the effectual extruder barrel of flat twin-screw of melting.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: this flat twin-screw extruder barrel, including the barrel in the axial be provided with two parallel through-holes, two parallel through-holes symmetry set up, and the radial cross-section of two parallel through-holes is crossing and the formation be horizontal "8" font, its characterized in that for 2 circles: the ratio of the length of the barrel to the diameter of the barrel is 12-18, the minimum distance between the inner wall of the parallel through hole and the outer surface of the spiral edge of the flat double screw extending into the parallel through hole is 1-4 mm, the thickness of the side wall of the two parallel through holes is 20-30 mm, the wall thickness of the barrel at the joint of the two parallel through holes is 90-100 mm, an exhaust cavity is arranged on the outer wall of the barrel corresponding to the joint of the melting section and the discharging section of the flat double screw, exhaust through holes are distributed on the bottom surface of the exhaust cavity and communicated with the parallel through holes, a layer of nitrided layer is arranged on the surface of the inner wall of the two parallel through holes, and the thickness of the nitrided layer is 0.5-0. As an improvement, the diameter of the parallel through holes is 105-125 mm, the diameter of a screw rod of the flat double screw rod extending into the parallel through holes is 100-120 mm, the width of an inner cavity formed by the two parallel through holes is 195-215 mm, the height of the inner cavity at the joint of the two parallel through holes is 65-80 mm, the width of a screw ridge gap of the two flat double screw rods extending into the parallel through holes is 2-6 mm, and the difference between the front screw ridge gap width and the rear screw ridge gap width of any screw ridge is less than or equal to 0.2 mm.
The diameter of the cylinder body is 250-270 mm, the length of the cylinder body is 4020-4200 mm, and the length of the thread section of the flat double screw extending into the parallel through hole is 4000-4160 mm.
The improved cylinder is further improved, the outer wall of the cylinder is axially and alternately provided with connecting screw holes, and the distance between every two adjacent connecting screw holes is 300-320 mm.
As the improvement, the number of the exhaust through holes positioned at the bottom of the exhaust concave cavity is two, the two exhaust through holes are symmetrically arranged, and the included angle of the central axes of the two exhaust through holes is 18-22 degrees.
The improved structure is further improved, the distance between the circle centers of the top openings of the exhaust through holes is 120-140 mm, the vertical distance between the top openings of the exhaust through holes and the central shaft of the cylinder body is 80-100 mm, and the diameter of each exhaust through hole is 32-38 mm.
The exhaust concave part bottom surface between two exhaust through holes is provided with four positioning screw holes, the depth of each positioning screw hole is 12-18 mm, two positioning screw holes are used as a group, and the distance between two groups of positioning screw holes is 55-65 mm.
The distance between the exhaust concave part and the end face of the cylinder body is 1200-1300 mm, and the width of the exhaust concave part is 70-90 mm.
As an improvement, a feeding concave part is arranged on the side wall of the barrel close to one end of the barrel, the bottom surface of the feeding concave part is a plane capable of being in seamless connection with a material conveying pipeline, the width of the plane is 250-300 mm, a feeding hole of the barrel is located in the middle of the plane, a second positioning concave part is arranged on the side wall of the barrel opposite to the feeding hole, the depth of the feeding concave part is 40-60 mm, and the depth of the second positioning concave part is 20-30 mm.
The improved structure is characterized in that the inner wall of the feed inlet is a conical surface, and the oblique angle of the conical surface is 18-22 degrees.
Compared with the prior art, the utility model has the advantages of: the extruder barrel can be matched with the flat double screw, so that the material is saved, the strength of the extruder barrel can be guaranteed, and the extruder barrel is matched with the flat double screw to fully treat materials; the nitriding layer on the inner wall of the machine barrel can enhance the wear resistance and corrosion resistance of the inner wall and prolong the service life of the machine barrel; the material backflow in the melting section is accelerated by the backflow grooves on the matched flat double screws, so that the materials are further uniformly mixed, the material heat exchange is more sufficient, and the material heat balance is achieved; the proper length-diameter ratio is selected, the materials can stay in the machine barrel for a longer time, and an exhaust concave cavity is arranged on the outer wall of the machine barrel corresponding to the joint of the melting section and the discharging section of the flat double screw, so that the local pressure imbalance is avoided, and the normal use of the extrusion combination is facilitated; because the length-diameter ratio of the machine barrel is larger than that of a common extruder barrel, connecting screw holes can be additionally arranged on the outer wall of the machine barrel at intervals, so that the machine barrel is positioned better, and the using effect is better; in addition, compared with the combination of a common screw and a machine barrel, the combination of the extruder barrel and the flat double screw has the advantages that the volume is increased, the yield is increased from 650kg/h to 800-1200 kg/h, the power of the main motor and the heating power are not increased synchronously along with the increase of the yield, and the effects of high efficiency and energy saving are achieved.
Drawings
Fig. 1 is a front perspective view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a top view of the positioning pocket of FIG. 1;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is a front perspective view of the extended flat twin screw according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line F-F of FIG. 5;
FIG. 7 is a schematic cross-sectional view of the two flat twin screws extended in FIG. 5 showing the width of the flight gap.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 7, the extruder barrel of the flat twin-screw of the present embodiment includes a barrel 1, two parallel through holes 11 are axially disposed in the barrel 1, the two parallel through holes 11 are symmetrically disposed, and the radial cross section of the two parallel through holes 11 is a horizontal 8-shape formed by intersecting 2 circles, the ratio of the length L9 of the barrel to the diameter D9 of the barrel is 12 to 18, the minimum distance between the inner wall of the parallel through hole and the outer surface of the flat twin-screw ridge extending into the parallel through hole 11 is 1 to 4mm, the side wall thickness H4 of the two parallel through holes is 20 to 30mm, the wall thickness H5 of the barrel at the connection of the two parallel through holes is 90 to 100mm, and an exhaust cavity 12 is disposed on the outer wall of the barrel corresponding to the connection of the melting section B and the discharging section C of the flat twin-screw, exhaust through holes 13 are disposed on the bottom surface of the exhaust cavity 12, the exhaust through holes 13, the inner wall surfaces of the two parallel through holes 11 are provided with a nitriding layer, and the thickness of the nitriding layer is 0.5-0.7 mm.
The diameter D1 of the parallel through holes is 105-125 mm, the screw diameter D0 of the flat twin screws extending into the parallel through holes 11 is 100-120 mm, the width S1 of the inner cavity formed by the two parallel through holes 11 is 195-215 mm, the height S6 of the inner cavity at the joint of the two parallel through holes 11 is 65-80 mm, the width of the screw ridge gap of the two flat twin screws extending into the parallel through holes 11 is 2-6 mm, and the difference between the front screw ridge gap width T8 and the rear screw ridge gap width T9 of any screw ridge is less than or equal to 0.2 mm. The diameter D9 of the cylinder is 250-270 mm, the length L9 of the cylinder is 4020-4200 mm, and the length L0 of the thread section of the flat double screw extending into the parallel through hole is 4000-4160 mm. Connecting screw holes are axially distributed on the outer wall of the cylinder at intervals, and the distance L2 between every two adjacent connecting screw holes is 300-320 mm.
The number of the exhaust through holes 13 at the bottom of the exhaust concave cavity 12 is two, the two exhaust through holes 13 are symmetrically arranged, and the included angle e1 of the central axes of the two exhaust through holes is 18-22 degrees. The distance S2 between the circle centers of the top openings of the exhaust through holes is 120-140 mm, the vertical distance H1 between the top openings of the exhaust through holes and the central axis of the cylinder body is 80-100 mm, and the diameter D2 of the exhaust through holes is 32-38 mm. Four positioning screw holes 14 are arranged on the bottom surface of the exhaust concave part between the two exhaust through holes, the depth of each positioning screw hole 14 is 12-18 mm, two positioning screw holes 14 are used as a group, and the distance S3 between the two groups of positioning screw holes is 55-65 mm. The distance L1 between the exhaust concave part and the end face of the cylinder is 1200-1300 mm, and the width S4 of the exhaust concave part is 70-90 mm.
The side wall of the barrel close to one end of the barrel is provided with a feeding concave part, the bottom surface of the feeding concave part is a plane capable of being in seamless connection with a material conveying pipeline, the width S5 of the plane is 250-300 mm, a feeding hole 15 of the barrel 1 is located in the middle of the plane, a second positioning concave part 16 is arranged on the side wall of the barrel opposite to the feeding hole 15, the depth H2 of the feeding concave part is 40-60 mm, and the depth H3 of the second positioning concave part is 20-30 mm. The inner wall of the feed port 15 is a conical surface, and the oblique angle e2 of the conical surface is 18-22 degrees.
The specific structure of the flat double screw rod extending into the parallel through hole 11 is that the flat double screw rod comprises a rod body 10 and screw ribs arranged on the rod body 10, the rod body 10 is cylindrical, the screw ribs comprise a feeding section A, a melting section B and a discharging section C, the melting section B consists of a single screw rib section and a double screw rib section which are mutually interrupted, a spiral backflow groove 101 is arranged on the double screw rib section close to the discharging end of the rod body, the spiral direction of the backflow groove 101 is opposite to the screw rib direction of the rod body, the screw rib interval provided with the backflow groove 101 is smaller than the screw rib interval at any position of the feeding section A and is smaller than the screw rib interval at any position of the discharging section C, the discharging section C consists of a discharging section C1 and a discharging section C2 which are mutually interrupted, the screw pitch L8 of the discharging section is larger than the screw pitch L90 of the discharging section, the length S50 of the backflow groove is 330-370 mm, and the distance H between the deepest part of the backflow groove and the outer, the opening width S60 of the reflow groove is 20-28 mm.
The melting section B comprises a melting section B1, a melting section B2 and a melting section B3, the melting section B3 is a single spiral edge section, the double spiral edge section consists of a melting section B1 and a melting section B2 which are mutually interrupted, the reflux groove 101 is arranged on the melting section B2, the interruption distance between the melting section B1 and the melting section B2 is 15-25 mm, and the interruption distance between the melting section B and the melting section B2 is 15-25 mm; the number of the reflow grooves 101 is four, the four reflow grooves 101 are distributed on the melting section B2 at equal intervals, the radial section of each reflow groove 101 is semicircular, and the radius of each reflow groove 101 is 12 mm; the length of the first melting section B1 is 400-460 mm, the length of the second melting section B2 is 400-460 mm, the length of the third melting section B3 is 100-130 mm, the width T5 of the first melting section screw rib is 18-20 mm, the width T6 of the second melting section screw rib is 16-18 mm, the width T7 of the third melting section screw rib is 14-16 mm, the pitch L5 of the first melting section is 50-55 mm, the pitch L6 of the second melting section is 45-50 mm, and the pitch L7 of the third melting section is 40-45 mm.
Claims (10)
1. The utility model provides a flat twin-screw extruder barrel, includes barrel (1), barrel (1) in axially be provided with two parallel through-holes (11), two parallel through-holes (11) symmetry set up, and the radial cross-section of two parallel through-holes (11) is crossing and form for 2 circles and be horizontal "8" font, its characterized in that: the ratio of the length (L9) of the barrel to the diameter (D9) of the barrel is 12-18, the minimum distance between the inner wall of the parallel through hole and the outer surface of the spiral edge of the flat double screw extending into the parallel through hole (11) is 1-4 mm, the thickness (H4) of the side walls of the two parallel through holes is 20-30 mm, the wall thickness (H5) of the barrel at the joint of the two parallel through holes is 90-100 mm, an exhaust concave cavity (12) is arranged on the outer wall of the barrel corresponding to the joint of the melting section (B) and the discharging section (C) of the flat double screw, exhaust through holes (13) are distributed on the bottom surface of the exhaust concave cavity (12), the exhaust through holes (13) are communicated with the parallel through holes (11), a nitriding layer is arranged on the surface of the inner wall of the two parallel through holes (11), and the thickness of the nitriding layer is 0.
2. The extruder barrel of claim 1, wherein: the diameter (D1) of the parallel through holes is 105-125 mm, the diameter (D0) of a flat double screw rod extending into the parallel through holes (11) is 100-120 mm, the width (S1) of an inner cavity formed by the two parallel through holes (11) is 195-215 mm, the height (S6) of the inner cavity at the joint of the two parallel through holes (11) is 65-80 mm, the width of a screw ridge gap of the two flat double screw rods extending into the parallel through holes (11) is 2-6 mm, and the difference between the front screw ridge gap width (T8) and the rear screw ridge gap width (T9) of any screw ridge is less than or equal to 0.2 mm.
3. The extruder barrel of claim 2, wherein: the diameter (D9) of the cylinder body is 250-270 mm, the length (L9) of the cylinder body is 4020-4200 mm, and the length (L0) of a thread section of the flat double screw extending into the parallel through hole is 4000-4160 mm.
4. The extruder barrel of claim 3 wherein: connecting screw holes are axially distributed on the outer wall of the cylinder at intervals, and the distance (L2) between every two adjacent connecting screw holes is 300-320 mm.
5. The extruder barrel of any one of claims 2 to 4, wherein: the number of the exhaust through holes (13) positioned at the bottom of the exhaust concave cavity (12) is two, the two exhaust through holes (13) are symmetrically arranged, and the included angle (e1) of the central axes of the two exhaust through holes is 18-22 degrees.
6. The extruder barrel of claim 5, wherein: the distance (S2) between the circle centers of the top openings of the exhaust through holes is 120-140 mm, the vertical distance (H1) between the top openings of the exhaust through holes and the central axis of the cylinder body is 80-100 mm, and the diameter (D2) of the exhaust through holes is 32-38 mm.
7. The extruder barrel of claim 5, wherein: four positioning screw holes (14) are arranged on the bottom surface of the exhaust concave part between the two exhaust through holes, the depth of each positioning screw hole (14) is 12-18 mm, two positioning screw holes (14) are used as a group, and the distance (S3) between the two groups of positioning screw holes is 55-65 mm.
8. The extruder barrel of claim 5, wherein: the distance (L1) between the exhaust concave part and the end face of the cylinder body is 1200-1300 mm, and the width (S4) of the exhaust concave part is 70-90 mm.
9. The extruder barrel of any one of claims 1 to 4, wherein: the feeding concave part is arranged on the side wall of the barrel close to one end of the barrel, the bottom surface of the feeding concave part is a plane capable of being in seamless connection with a material conveying pipeline, the width (S5) of the plane is 250-300 mm, a feeding hole (15) of the barrel (1) is located in the middle of the plane, a second positioning concave part (16) is arranged on the side wall of the barrel opposite to the feeding hole (15), the depth (H2) of the feeding concave part is 40-60 mm, and the depth (H3) of the second positioning concave part is 20-30 mm.
10. The extruder barrel of claim 9 wherein: the inner wall of the feed port (15) is a conical surface, and the oblique angle (e2) of the conical surface is 18-22 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020173055.3U CN212097383U (en) | 2020-02-15 | 2020-02-15 | Extruder barrel of flat double screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020173055.3U CN212097383U (en) | 2020-02-15 | 2020-02-15 | Extruder barrel of flat double screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212097383U true CN212097383U (en) | 2020-12-08 |
Family
ID=73631602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020173055.3U Expired - Fee Related CN212097383U (en) | 2020-02-15 | 2020-02-15 | Extruder barrel of flat double screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212097383U (en) |
-
2020
- 2020-02-15 CN CN202020173055.3U patent/CN212097383U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201208 |
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| CF01 | Termination of patent right due to non-payment of annual fee |