CN216782603U - Low-shear pressure-stabilizing high-quality color mixing screw - Google Patents
Low-shear pressure-stabilizing high-quality color mixing screw Download PDFInfo
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- CN216782603U CN216782603U CN202120723170.8U CN202120723170U CN216782603U CN 216782603 U CN216782603 U CN 216782603U CN 202120723170 U CN202120723170 U CN 202120723170U CN 216782603 U CN216782603 U CN 216782603U
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Abstract
Low-shear steady voltage high-quality colour mixture screw rod is including the body of rod, crown, draw-in groove, straight section, connecting thread section, screw thread, reinforced section, compression section, measurement section, first measurement section, slot, mill groove section, levogyration mill groove, screw head, pore and spiral shell arris. The utility model has the advantages that: the screw divides and shunts the melting stock for a plurality of times by utilizing the groove and the left-handed milling groove arranged on the outer wall of the metering section so as to increase the mixing, homogenization and dispersibility of the additive to the material, obtain low-temperature extrusion, and lead the color mixing of the extrudate to be uniform and have no air holes, thereby realizing the aim of shunting and mixing under the action of smaller shearing force; meanwhile, the grooves and the left-handed milling grooves are uniformly distributed on the outer walls of the groove sections and the left-handed milling grooves, so that the grooves and the left-handed milling grooves can be uniformly distributed for many times, sudden strong shearing of the screw rod is avoided, the output pressure is stable, a high-quality color mixing effect is ensured, and good processing performance is achieved.
Description
Technical Field
The utility model relates to a low-shear pressure-stabilizing high-quality color mixing screw, belonging to the technical field of screws.
Background
The application of the targeted novel screw rod in the plastic industry is more and more extensive, and the structural form and the geometric parameters of the screw rod directly determine the application range, plasticizing capacity, production capacity and self-cleaning capacity of the extruder for material processing. The screw with a common structure, such as a single thread, an equidistant double thread, a convergent type double main and auxiliary threads and the like, often has the problems of uneven color mixing, poor effect, poor plasticization, overheating of melt, aggravated pressure fluctuation and the like.
In practical operation, the traditional shearing and splitting screw has weak splitting and mixing effects under the action of small shearing force, and meanwhile, the screw can generate abrupt strong shearing force, so that the output pressure is unstable, and the high-quality color mixing effect cannot be obtained. Therefore, further research and improvement on the shearing and shunting screw are needed, so that the shearing and shunting screw can have a shunting and mixing effect under the condition of low material viscosity to obtain stable output pressure, thereby achieving good processing performance and having wide application prospect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a low-shear pressure-stabilizing high-quality color mixing screw.
The utility model aims to solve the problems that the existing shearing and shunting screw has weak shunting and mixing effects under the action of small shearing force, and the screw can generate sudden strong shearing force to cause unstable output pressure and fail to obtain high-quality color mixing effect.
In order to realize the purpose of the utility model, the technical scheme adopted by the utility model is as follows:
low shear steady voltage high quality colour mixture screw rod, including the body of rod, crown, draw-in groove, straight section, connecting thread section, screw thread, reinforced section, compression section, measurement section, first measurement section, slot, mill groove section, levogyration mill groove, screw head, pore and spiral shell arris, characterized by: the body of rod is by the crown in proper order, straight section, connecting thread section, the reinforced section, the compression section, the measurement section, the screw head is constituteed, be equipped with the draw-in groove in the side end face of crown, the axial equipartition has the screw on connecting thread section's the outer wall, the reinforced section, be equipped with the spiral shell arris in compression section and the measurement section, pitch between the adjacent two spiral shells arris is W, the width of spiral shell arris is L, the spiral shell arris height is H, be equipped with first measurement section in proper order in the measurement section, ditch groove section and milling flutes section, the axial equipartition has the slot on the outer wall of ditch groove section, the equipartition has the levogyration milling flutes on milling flutes section's the outer wall, the helical pitch of levogyration milling flutes is D, be equipped with the pore on the screw head.
Further, the rod body is subjected to quenching and tempering treatment, and the hardness is HB 280-320; the surface nitriding treatment depth of the spiral part of the rod body is more than or equal to 0.55mm, and the hardness is more than or equal to HV 950; the precision grade is more than or equal to grade 7; after loading, the extrudate is uniformly mixed with color and has no air holes, and the fluctuation of the discharge amount is less than 1 percent at constant rotating speed.
Further, the body of rod is the unequal depth screw rod of equidistance, and each flight height is the same, the ratio of the height H of flight and pitch W: H/W = 1.
Furthermore, the screw grooves on the feeding section have equal depth; the depths of the screw grooves on the first metering section are equal; the depth of the screw groove on the feeding section is larger than that of the screw groove on the metering section.
Furthermore, the direction of the screw groove depth on the compression section from the feeding section to the metering section is gradually changed from deep to shallow, and the bottom diameter of the rod body is gradually changed from small to large.
Furthermore, the length ratio of the feeding section to the compression section to the metering section is 3-4:2-3: 2-3.
Further, the bottoms of the groove and the left-handed milling groove are of arc structures; the radius size of the groove is larger than that of the left-handed milling groove; the lead of the left-handed milling groove is 9 mm.
The utility model has the advantages that: the screw divides and shunts the melting stock for a plurality of times by utilizing the groove and the left-handed milling groove arranged on the outer wall of the metering section so as to increase the mixing, homogenization and dispersibility of the additive to the material, obtain low-temperature extrusion, and lead the color mixing of the extrudate to be uniform and have no air holes, thereby realizing the aim of shunting and mixing under the action of smaller shearing force; meanwhile, the grooves and the left-handed milling grooves are uniformly distributed on the outer walls of the groove sections and the left-handed milling grooves, so that the grooves and the left-handed milling grooves can be uniformly distributed for many times, sudden and sharp strong shearing of the screw rod is avoided, the output pressure is stable, a high-quality color mixing effect is ensured, good processing performance is achieved, the fluctuation of the discharge amount is less than 1% at constant rotating speed, and the method has a wide application prospect.
Drawings
FIG. 1 is a schematic structural view of a low-shear pressure-stabilizing high-quality color mixing screw;
FIG. 2 is a schematic cross-sectional view of a groove B-B of a low-shear, pressure-stabilizing, high-quality, color-mixing screw;
FIG. 3 is a schematic cross-sectional view of the screw edge C-C of the low shear, pressure-stabilizing, high quality, color-mixing screw;
FIG. 4 is a schematic cross-sectional view of a groove section E-E of a low shear, pressure-stabilizing, high quality color mixing screw;
FIG. 5 is an enlarged view of a groove milling of a low shear, steady pressure, high quality, color mixing screw;
FIG. 6 is an enlarged view of the groove milling section P of the low shear steady voltage high quality color mixing screw;
FIG. 7 is an enlarged view of the screw head of the low-shear, pressure-stabilizing, high-quality, color-mixing screw;
in the figure: 1. the screw rod comprises a rod body 2, a handle head 21, a clamping groove 3, a straight section 4, a connecting thread section 41, a thread 5, a feeding section 6, a compression section 7, a metering section 71, a first metering section 72, a groove section 721, a groove 73, a groove milling section 731, a left-handed groove milling 8, a screw rod head 81, a pore channel 9 and a screw ridge.
Detailed Description
The utility model is further described with reference to the following figures and examples.
The low-shear pressure-stabilizing high-quality color mixing screw comprises a screw body 1, a handle head 2, a clamping groove 21, a straight section 3, a connecting thread section 4, threads 41, a feeding section 5, a compression section 6, a metering section 7, a first metering section 71, a groove section 72, a groove 721, a groove milling section 73, a left-handed groove milling 731, a screw head 8, a hole channel 81 and a screw ridge 9, wherein the screw body 1 sequentially comprises the handle head 2, the straight section 3, the connecting thread section 4, the feeding section 5, the compression section 6, the metering section 7 and the screw head 8, the clamping groove 21 is arranged in one side end face of the handle head 2 and used for fixed installation, and the threads 41 are axially and uniformly distributed on the outer wall of the connecting thread section 4 and used for threaded connection; the feeding section 5, the compression section 6 and the metering section 7 are provided with screw ridges 9 which are screw rod components, the screw pitch between two adjacent screw ridges 9 is W, the width of the screw ridge 9 is L, and the height of the screw ridge 9 is H; the metering section 7 is sequentially provided with a first metering section 71, a groove section 72 and a groove milling section 73 for uniform mixing, grooves 721 are uniformly distributed on the outer wall of the groove section 72 in the axial direction for shunting materials, left-handed milling grooves 731 for shunting materials are uniformly distributed on the outer wall of the groove milling section 73, and the lead of the left-handed milling grooves 731 is D; the screw head 8 is provided with a duct 81 for fixed mounting.
Further, the quenching and tempering hardness of the rod body 1 is HB 280-320; the surface nitriding treatment depth of the spiral part of the rod body 1 is more than or equal to 0.55mm, and the hardness is more than or equal to HV 950; the precision grade is more than or equal to grade 7; after loading, the extrudate has uniform color mixing and no air holes, and the fluctuation of the discharge amount is less than 1% at constant rotating speed.
Further, the body of rod 1 is the unequal depth screw of equidistance, and each flight 9 height is the same, and the ratio of the height H of flight 9 and pitch W: H/W = 1.
Further, the screw grooves on the feeding section 5 are equal in depth; the depths of the screw grooves on the first metering section 71 are equal; the depth of the screw groove on the feeding section 5 is larger than that of the screw groove on the metering section 71.
Furthermore, the depth of the screw groove on the compression section 6 gradually changes from deep to shallow from the direction from the feeding section 5 to the metering section 7, and meanwhile, the bottom diameter of the rod body 1 gradually changes from small to large.
Furthermore, the length ratio of the feeding section 5, the compression section 6 and the metering section 7 is 3-4:2-3: 2-3.
Further, the bottoms of the grooves 721 and the left-handed milling grooves 731 are arc structures; the radial dimension of the slot 721 is greater than the radial dimension of the left-hand milled slot 731; the lead of the left-hand milled groove 731 is 9 mm.
The using method comprises the following steps: after the rod body 1 is installed, adjusting the processing temperature of the machine to be close to the ideal processing temperature range of the processed material, and starting the machine when the rod body 1 reaches the preset temperature; the rod body 1 rotates in the barrel, materials enter the barrel from the hopper and then reach the feeding section 5, and the materials are pushed to move forwards in the feeding section 5 through the rotation of the rod body 1; then the material enters a compression section 6, and the material is fully melted and homogenized through heat transfer and friction shearing in the section; then, the material enters a first metering section 71, so that the sizes of the components of the material are further refined and uniform to form an ideal structure; then, the material enters the groove section 72 and passes through a plurality of groups of grooves 721, a material converging area is arranged between each group of grooves 721, the material is divided by the grooves 721, converges at the converging area, and then is divided and converged, so that the material flowing direction is changed, and the melt components and the temperature are homogenized; then, the material enters the left-handed milling groove section 73, passes through a plurality of groups of left-handed milling grooves 731, can be further compressed to the maximum extent, is divided into material flows, is increased in interface, is changed in material flow direction, is rearranged, and is finally extruded and granulated through the screw head 8.
Claims (7)
1. Low-shear steady voltage high-quality colour mixture screw rod, including the body of rod (1), crown (2), draw-in groove (21), straight section (3), connecting thread section (4), screw thread (41), add material section (5), compression section (6), measurement section (7), first measurement section (71), slot segment (72), slot (721), milling flutes section (73), levogyration milling flutes (731), screw head (8), pore (81) and spiral shell arris (9), characterized by: the rod body (1) sequentially comprises a handle head (2), a straight section (3), a connecting thread section (4), a feeding section (5), a compression section (6), a metering section (7) and a screw head (8), a clamping groove (21) is arranged in one side end face of the handle head (2), threads (41) are axially and uniformly distributed on the outer wall of the connecting thread section (4), screw ridges (9) are arranged on the feeding section (5), the compression section (6) and the metering section (7), the thread pitch between every two adjacent screw ridges (9) is W, the width of each screw ridge (9) is L, the height of each screw ridge (9) is H, a first metering section (71), a groove section (72) and a groove milling section (73) are sequentially arranged on the metering section (7), grooves (721) are axially and uniformly distributed on the outer wall of the groove section (72), left-handed milling grooves (731) are uniformly distributed on the outer wall of the groove milling section (73), and the lead of the left-handed milling grooves (731) is D, the screw head (8) is provided with a pore channel (81).
2. The low-shear pressure-stabilizing high-quality color mixing screw according to claim 1, wherein: the rod body (1) has the quenching and tempering hardness of HB 280-320; the surface nitriding treatment depth of the spiral part of the rod body (1) is more than or equal to 0.55mm, and the hardness is more than or equal to HV 950; the precision grade is more than or equal to grade 7; after loading, the extrudate has uniform color mixing and no air holes, and the fluctuation of the discharge amount is less than 1% at constant rotating speed.
3. The low-shear pressure-stabilizing high-quality color mixing screw according to claim 1, wherein: the body of rod (1) is the unequal dark screw rod of equidistance, and each flight (9) height is the same, the ratio of the height H and the pitch W of flight (9): H/W = 1.
4. The low-shear pressure-stabilizing high-quality color mixing screw according to claim 1, wherein: the screw grooves on the feeding section (5) are equal in depth; the depths of the screw grooves on the first metering section (71) are all equal; the depth of the screw groove on the feeding section (5) is larger than that of the screw groove on the metering section (71).
5. The low-shear pressure-stabilizing high-quality color mixing screw according to claim 1, wherein: the screw groove depth on the compression section (6) gradually changes from deep to shallow from the direction from the feeding section (5) to the metering section (7), and the bottom diameter of the rod body (1) gradually changes from small to large.
6. The low-shear pressure-stabilizing high-quality color mixing screw according to claim 1, wherein: the length ratio of the feeding section (5), the compression section (6) and the metering section (7) is 3-4:2-3: 2-3.
7. The low-shear pressure-stabilizing high-quality color mixing screw according to claim 1, wherein: the bottoms of the grooves (721) and the left-handed milling grooves (731) are of circular arc structures; the radius size of the groove (721) is larger than that of the left-handed milling groove (731); the lead of the left-handed milling groove (731) is 9 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120723170.8U CN216782603U (en) | 2021-04-09 | 2021-04-09 | Low-shear pressure-stabilizing high-quality color mixing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120723170.8U CN216782603U (en) | 2021-04-09 | 2021-04-09 | Low-shear pressure-stabilizing high-quality color mixing screw |
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| CN216782603U true CN216782603U (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120723170.8U Active CN216782603U (en) | 2021-04-09 | 2021-04-09 | Low-shear pressure-stabilizing high-quality color mixing screw |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113693947A (en) * | 2021-08-19 | 2021-11-26 | 张家港江苏科技大学产业技术研究院 | Extrusion crushing rod for auxiliary feeding device |
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2021
- 2021-04-09 CN CN202120723170.8U patent/CN216782603U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113693947A (en) * | 2021-08-19 | 2021-11-26 | 张家港江苏科技大学产业技术研究院 | Extrusion crushing rod for auxiliary feeding device |
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