CN204526092U - The special two sections of BM formula screw rods of electric wire extruder - Google Patents

The special two sections of BM formula screw rods of electric wire extruder Download PDF

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Publication number
CN204526092U
CN204526092U CN201520017889.4U CN201520017889U CN204526092U CN 204526092 U CN204526092 U CN 204526092U CN 201520017889 U CN201520017889 U CN 201520017889U CN 204526092 U CN204526092 U CN 204526092U
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China
Prior art keywords
screw thread
thread
auxiliary
auxiliary screw
sections
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Expired - Fee Related
Application number
CN201520017889.4U
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Chinese (zh)
Inventor
张清富
沈良华
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Anhui Puruisi Electrical Machinery Co Ltd
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Anhui Puruisi Electrical Machinery Co Ltd
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Priority to CN201520017889.4U priority Critical patent/CN204526092U/en
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Abstract

The utility model provides the special two sections of BM formula screw rods of a kind of electric wire extruder, and its homo-effect is desirable, and material is little from warming phenomenon, to consume power of motor low, mass transport ability is strong.Comprise feed zone, melt zone and homogenizing zone, on described screw rod, whole process is provided with main thread, described melt zone whole process is provided with the first end to end auxiliary screw thread and the second auxiliary screw thread, and described main thread groove depth h1 is greater than the first auxiliary screw thread groove depth h2 and the second auxiliary screw thread groove depth h3; Described main thread helical angle φ 1 is less than the first auxiliary screw thread φ 2, and described φ 2 is less than the second auxiliary thread helix angle φ 3.Described feed zone leading portion is provided with double thread.Described first auxiliary screw thread, the second auxiliary screw thread upper surface are set to circular arc.The draw ratio of described screw rod is 30:1, compression ratio i=1.3-1.8.

Description

The special two sections of BM formula screw rods of electric wire extruder
Technical field
The utility model relates to electric wire extruder, is specifically related to a kind of extruder screw.
Background technology
Electric wire extrusion equipment majority is Single screw extrusion, screw rod is the critical piece of extruder, be related to range of application and the production efficiency of extruder, and the architectural feature of screw rod, basic parameter affect larger on the plasticizing of plastics and molding effect, generally speaking, the viscosity of material is high, the plastic friction heat-dissipating of poor fluidity fast, and shears comparatively responsive to temperature, big L/D ratio should be selected, the screw rod of low compression ratio; In prior art, electric wire extruder screw homo-effect is not ideal enough, is subject to huge shearing and produces from warming phenomenon obvious, cause material in extrusion overheated to shear sensitive material; In addition, in existing screw rod shearing process, power of motor consumption is comparatively large, and the conveying capacity of material is not ideal enough.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of electric wire extruder special two sections of BM formula screw rods, and its homo-effect is desirable, and material is little from warming phenomenon, to consume power of motor low, mass transport ability is strong.
For solving the problems of the technologies described above, the special two sections of BM formula screw rods of electric wire extruder of the present utility model, comprise feed zone, melt zone and homogenizing zone, on described screw rod, whole process is provided with main thread, described melt zone whole process is provided with the first end to end auxiliary screw thread and the second auxiliary screw thread, and described main thread groove depth h1 is greater than the first auxiliary screw thread groove depth h2 and the second auxiliary screw thread groove depth h3; Described main thread helical angle φ 1 is less than the auxiliary thread helix angle φ 2 of the first auxiliary thread helix angle φ 2, described first and is less than the second auxiliary thread helix angle φ 3.
Described feed zone leading portion is provided with double thread.
Described first auxiliary screw thread, the second auxiliary screw thread upper surface are set to circular arc.
Described feed zone leading portion equidistantly waits dark, screw rod root footpath D s1invariable; The second half section of described feed zone, screw rod root footpath is by D s1gradual change is incremented to D s2; Described melt zone, screw rod root footpath is by D s2gradual change is incremented to D s3; Described homogenizing zone, screw rod root footpath is invariable.
The draw ratio of described screw rod is 30:1, compression ratio i=1.3-1.8.Preferably, the compression ratio i=1.7 of described screw rod.
The haul distance of described double thread and feed zone lenth ratio are 1:3.6, and the second auxiliary screw thread travel length and the first auxiliary screw thread travel lenth ratio are 1:3.3.
Described main thread helical angle φ 1 is 17 ° of 39', and the first auxiliary thread helix angle φ 2 is 18 ° of 45', and described second auxiliary thread helix angle φ 3 is 24 ° of 1'.
After have employed technique scheme, its technique effect is embodied in:
1, feed zone is double thread, melt zone adopts double end continuous two-part BM form, auxiliary screw thread all adopts circular arc, two sections of BM head and the tail communicate, melt tank is entered by the gap of auxiliary screw thread and machine barrel after first paragraph BM solid groove material plasticizing, along with screw rod rotation material be advanced to second segment BM, now the melt tank material of first paragraph BM enters the solid groove of second segment BM, the little crystalline substance point of the plastics do not plastified completely is through shearing further, friction, extruding is until all enter the melt tank of second segment BM after plasticizing through the gap of the auxiliary screw thread of second segment BM and machine barrel, homo-effect is better than one-part form BM,
2, the effect of auxiliary screw thread just makes Solid Bed fix, prevent Solid Bed from disintegrating and transfer, the material of melting is only had just to enter melt body groove by the gap of auxiliary screw thread and machine barrel, auxiliary threaded circular arc is compared with ordinary rectangular screw thread, the section of shear of material between spiral shell rib and machine barrel obviously reduces, and the shearing that the reduction material of shear surface is subject to is also less, be subject to huge shearing generation to shear sensitive material also to reduce from warming phenomenon thereupon, simultaneously along with the power of motor that minimizing consumes of shear surface also reduces simultaneously, save the energy.
3, feed zone adopts double thread, and helical pitch is identical with common BM screw pitch, can improve the conveying capacity of material;
4, draw ratio more greatly 30:1, plasticizing capacity is comparatively strong, suitably can improve screw speed, and extrusion capacity can improve 1.1-1.3 doubly; And be provided with continuous two sections of BM, compression ratio i is less than common one-part form BM screw rod, i=1.3-1.8 just can reach good plasticizing effect (compression ratio of common one-part form BM screw rod is set up as about i=2-2.4), material is sheared and is extruded produced heat and reduced, and avoids that heat sensitive material is produced overheated.
Accompanying drawing explanation
Fig. 1 is the structural representation of the special two sections of BM formula screw rods of electric wire extruder of the present utility model;
Fig. 2 is the schematic diagram of the feed zone of the special two sections of BM formula screw rods of electric wire extruder of the present utility model;
Fig. 3 is the schematic diagram of the melt zone of the special two sections of BM formula screw rods of electric wire extruder of the present utility model;
Fig. 4 is the schematic diagram of the homogenizing zone of the special two sections of BM formula screw rods of electric wire extruder of the present utility model;
Fig. 5 is the sectional view of Fig. 3 along K-K line.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further.
As Fig. 1 to Fig. 5 is visible, the special two sections of BM formula screw rods of electric wire extruder of the present utility model, comprise feed zone 1, melt zone 2 and homogenizing zone 3, on described screw rod, whole process is provided with main thread 4, described melt zone 2 whole process is provided with the first end to end auxiliary screw thread 5 and the second auxiliary screw thread 6, and described main thread 4 groove depth h1 is greater than the first auxiliary screw thread 5 groove depth h2 and the second auxiliary screw thread 6 groove depth h3.
Described main thread 4 helical angle φ 1 is less than auxiliary screw thread 5 helical angle of the first auxiliary screw thread 5 helical angle φ 2, described first and is less than the second auxiliary screw thread 6 helical angle φ 3.Thus make the melt zone 2 in the first auxiliary screw thread 5 stroke range, solid well width reduces until disappear gradually, melt tank width then increases gradually, described first auxiliary screw thread 5 possesses a suitable stroke, thus make in the position of the first auxiliary screw thread 5 ending, main thread 4 and the first auxiliary screw thread 5 spacing are zero, thus make all materials enter the melt tank of this position.
On the melt zone 2 at the second auxiliary screw thread 6 place, the width of solid groove and melt tank presents above-mentioned rule again.That is, the second auxiliary screw thread 6 original position, the solid well width of screw rod is maximum, and melt tank width is zero; Second auxiliary screw thread 6 possesses a suitable stroke, thus makes in the position of the second auxiliary screw thread 6 ending, and main thread 4 and the second auxiliary screw thread 6 spacing are zero, and namely solid well width is zero, and melt tank width reaches maximum.
Thus along with bolt rotary, material all will enter the solid groove of the melt zone 2 at the second auxiliary screw thread 6 place automatically from the first auxiliary screw thread 5 end position, at the end of the melt zone 2 at the second auxiliary screw thread 6 place, solid well width is zero, and all materials all enter homogenizing zone 3.
Melt zone 2 adopts double end continuous two-part BM form, auxiliary screw thread all adopts circular arc, two sections of BM head and the tail communicate, melt tank is entered by the gap of auxiliary screw thread and machine barrel after first paragraph BM solid groove material plasticizing, rotation material along with screw rod is advanced to the leading portion of second segment BM, now the melt tank material of first paragraph BM enters the solid groove of second segment BM, the little crystalline substance point of the plastics do not plastified completely is through shearing further, friction, extruding is until all enter the melt tank of second segment BM after plasticizing through the gap of the auxiliary screw thread of second segment BM and machine barrel, homo-effect is better than one-part form BM.
Described first auxiliary screw thread 5 helical angle φ 2 is less than the second auxiliary screw thread 6 helical angle φ 3, thus make the second auxiliary screw thread 6 haul distance be less than the first auxiliary screw thread 5 haul distance, two sections of auxiliary angles of thread are different, the shearing force produced is different, contribute to adapting to fine difference between material particles carry out melting and extrude, improve homo-effect.
Described feed zone leading portion 10 is provided with double thread 7.Its helical pitch arranges and conventional BM screw pitch can be adopted identical, can improve the conveying capacity of material.
As shown in Figure 5, the first described auxiliary screw thread 5 upper surface is set to circular arc.Second auxiliary screw thread 6 upper surface is also similar is set to circular arc.The effect of auxiliary screw thread just makes Solid Bed fix, prevent Solid Bed from disintegrating and transfer, the material of melting is only had just to enter melt body groove by the gap of auxiliary screw thread and machine barrel, auxiliary threaded circular arc is compared with ordinary rectangular screw thread, the section of shear of material between spiral shell rib and machine barrel obviously reduces, and the shearing that the reduction material of shear surface is subject to is also less, be subject to huge shearing generation to shear sensitive material also to reduce from warming phenomenon thereupon, simultaneously along with the power of motor that minimizing consumes of shear surface also reduces simultaneously, save the energy.
Described feed zone leading portion 10 equidistantly waits dark, screw rod root footpath D s1invariable; The second half section of described feed zone 1, screw rod root footpath is by D s1gradual change is incremented to D s2; Described melt zone 2, screw rod root footpath is by D s2gradual change is incremented to D s3; Described homogenizing zone 3, screw rod root footpath is invariable.
In the utility model, the draw ratio more greatly 30:1 of screw rod, plasticizing capacity is comparatively strong, suitably can improve screw speed, and extrusion capacity can improve 1.1-1.3 doubly; And it is less than common one-part form BM screw rod to be provided with continuous two sections of BM, compression ratio i, i=1.3-1.8 just can reach good plasticizing effect, and material is sheared and extruded produced heat and reduces, and avoids that heat sensitive material is produced overheated.Compression ratio computing formula: i=(h1* (D-h1))/(h3* (D-h3)).
As one of embodiment, spiro rod length L is 3600mm, wherein feed zone 1 length 1270mm, melt zone 2 length 1560mm, homogenizing zone 3 length 770mm; On the feed zone leading portion 10 of the initial 350mm stroke of feed zone 1, be provided with double thread 7, haul distance and feed zone 1 lenth ratio of described double thread 7 are 1:3.6, can adapt to the charging needs of screw rod preferably; Described melt zone 2 whole process is provided with the first end to end auxiliary screw thread 5 and the second auxiliary screw thread 6, wherein the first auxiliary screw thread 5 haul distance 1200 mm, second auxiliary screw thread 6 haul distance 360 mm, second auxiliary screw thread 6 haul distance and the first auxiliary screw thread 5 haul distance ratio are 1:3.3, and screw rod can be made to reach good homo-effect.
Described main thread 4 helical angle φ 1 is 17 ° of 39', and the first auxiliary screw thread 5 helical angle φ 2 is 18 ° of 45', and described second auxiliary screw thread 6 helical angle φ 3 is 24 ° of 1'.
Screw rod average diameter D is 120mm, and draw ratio is 30:1.In whole screw rod, pitch S is identical with average diameter D for main thread 4, and in the present embodiment, constant is 120mm.Be 14.5mm in feed zone 1 first depth of thread, last depth of thread of homogenizing zone 3 is 8mm, compression ratio i=1.70.
In the present embodiment, described feed zone leading portion 10 equidistantly waits dark, screw rod root footpath D s1invariable, D s1=90mm; The second half section of described feed zone 1, screw rod root footpath is by D s1gradual change is incremented to D s2, D s2=96mm; Described melt zone 2, screw rod root footpath is by D s2gradual change is incremented to D s3, D s3=106mm; Described homogenizing zone 3, screw rod root footpath is invariable.
The parameters proportioning of the present embodiment, can better adapt to electric wire and extrude needs, and homo-effect is desirable, and material is little from warming phenomenon, to consume power of motor low, mass transport ability is strong.

Claims (8)

1. the special two sections of BM formula screw rods of electric wire extruder, comprise feed zone (1), melt zone (2) and homogenizing zone (3), it is characterized in that: on described screw rod, whole process is provided with main thread (4), described melt zone (2) whole process is provided with the first end to end auxiliary screw thread (5) and the second auxiliary screw thread (6), and described main thread (4) groove depth h1 is greater than the first auxiliary screw thread (5) groove depth h2 and the second auxiliary screw thread (6) groove depth h3; Described main thread (4) helical angle φ 1 is less than the first auxiliary screw thread (5) helical angle φ 2, described first auxiliary screw thread (5) helical angle φ 2 and is less than the second auxiliary screw thread (6) helical angle φ 3.
2. the special two sections of BM formula screw rods of electric wire extruder as claimed in claim 1, is characterized in that: described feed zone leading portion (10) is provided with double thread (7).
3. the special two sections of BM formula screw rods of electric wire extruder as claimed in claim 1 or 2, is characterized in that: the described first auxiliary screw thread (5), the second auxiliary screw thread (6) upper surface are set to circular arc.
4. the special two sections of BM formula screw rods of electric wire extruder as claimed in claim 1 or 2, is characterized in that: described feed zone leading portion (10) equidistantly waits dark, screw rod root footpath D s1invariable; The second half section of described feed zone (1), screw rod root footpath is by D s1gradual change is incremented to D s2; Described melt zone (2), screw rod root footpath is by D s2gradual change is incremented to D s3; Described homogenizing zone (3), screw rod root footpath is invariable.
5. the special two sections of BM formula screw rods of electric wire extruder as claimed in claim 1 or 2, is characterized in that: the draw ratio of described screw rod is 30:1, compression ratio i=1.3-1.8.
6. the special two sections of BM formula screw rods of electric wire extruder as claimed in claim 5, is characterized in that: the compression ratio i=1.7 of described screw rod.
7. the special two sections of BM formula screw rods of electric wire extruder as claimed in claim 2, it is characterized in that: haul distance and feed zone (1) lenth ratio of described double thread (7) are 1:3.6, the second auxiliary screw thread (6) haul distance and the first auxiliary screw thread (5) haul distance ratio are 1:3.3.
8. the special two sections of BM formula screw rods of electric wire extruder as claimed in claim 6, it is characterized in that: described main thread (4) helical angle φ 1 is 17 ° of 39', first auxiliary screw thread (5) helical angle φ 2 is 18 ° of 45', and described second auxiliary screw thread (6) helical angle φ 3 is 24 ° of 1'.
CN201520017889.4U 2015-01-12 2015-01-12 The special two sections of BM formula screw rods of electric wire extruder Expired - Fee Related CN204526092U (en)

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CN201520017889.4U CN204526092U (en) 2015-01-12 2015-01-12 The special two sections of BM formula screw rods of electric wire extruder

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104589618A (en) * 2015-01-12 2015-05-06 安徽普瑞斯电工机械有限公司 Special two-section BM type screw rod for wire and cable extruder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104589618A (en) * 2015-01-12 2015-05-06 安徽普瑞斯电工机械有限公司 Special two-section BM type screw rod for wire and cable extruder
CN104589618B (en) * 2015-01-12 2017-01-18 安徽普瑞斯电工机械有限公司 Special two-section BM type screw rod for wire and cable extruder

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150805

Termination date: 20160112