CN210880808U - Screw rod for low-temperature foaming material extrusion molding - Google Patents
Screw rod for low-temperature foaming material extrusion molding Download PDFInfo
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- CN210880808U CN210880808U CN201920348487.0U CN201920348487U CN210880808U CN 210880808 U CN210880808 U CN 210880808U CN 201920348487 U CN201920348487 U CN 201920348487U CN 210880808 U CN210880808 U CN 210880808U
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Abstract
The utility model provides a screw rod for low-temperature foaming material extrusion molding, which is applied to the technical field of low-temperature foaming material extrusion molding equipment, and comprises a feeding section (1), a compression section (2), a homogenization section (3) and a plasticizing section (4), wherein the length-diameter ratio of the screw rod for low-temperature foaming material extrusion molding is between 28 and 32; compression ratio of screw rod for low temperature expanded material extrusion moulding is between 2.1-2.4, screw rod for low temperature expanded material extrusion moulding, simple structure, it is with low costs, ensure the screw rod in low temperature expanded material extrusion moulding technology, low temperature expanded material is more smooth and easy, the reduction is cuted at the extrusion in-process, improves the bad phenomenon of goods that low temperature foaming EVA material caused in the extrusion process, improves the whole quality of low temperature expanded material extrusion moulding.
Description
Technical Field
The utility model belongs to the technical field of low temperature expanded material extrusion moulding equipment, more specifically say, relate to a screw rod for low temperature expanded material extrusion moulding.
Background
EVA (EVA means ethylene-vinyl acetate copolymer) foaming materials in the current market generally comprise a crosslinking agent and a foaming agent, crosslinking is generated through pyrolysis of the crosslinking agent to improve strength, and gas foaming is generated through pyrolysis of the foaming agent. With the increasing requirements on energy conservation and consumption reduction, the EVA foamed at low temperature becomes the subject of research. As the rise temperature of the material decreases, the processing requirements of the foamed material become higher and higher. Currently, the current practice is. Extrusion is a common way of processing EVA foams. The quality of the low-temperature foaming material extrusion molding product is directly influenced by the structural design performance of the screw. In the prior art, because the EVA material foamed at low temperature is sensitive to temperature and pressure, when the screw is plasticized and sheared too strongly, the strength of the material is easily reduced, foaming performance is attenuated, and when the screw is poorly plasticized, the appearance of a product is easily damaged, and the appearance is unqualified. Therefore, the design of the screw for extruding the low-temperature foaming EVA material is particularly important.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: aiming at the defects of the prior art, the screw for the extrusion molding of the low-temperature foaming material is simple in structure, the structure of the screw is uniquely improved, the screw is ensured to be more smooth and reduce shearing in the extrusion process of the low-temperature foaming material in the extrusion molding process of the low-temperature foaming material, the bad product phenomenon caused in the extrusion process of the low-temperature foaming EVA material is improved, and the overall quality of the extrusion molding of the low-temperature foaming material is improved.
To solve the technical problem, the utility model discloses the technical scheme who takes does:
the utility model relates to a screw rod for low temperature expanded material extrusion moulding, screw rod for low temperature expanded material extrusion moulding including adding material section, compression section, homogenization section, plastify section, add the material section and be located screw rod one end tip for low temperature expanded material extrusion moulding, the plastify section is located screw rod other end tip for low temperature expanded material extrusion moulding, compression section one end is connected with the material section of adding, the compression section other end is connected with the homogenization section, the homogenization section other end is connected with plastify section one end, add material section, compression section, homogenization section, plastify section formula structure as an organic whole, set up a plurality of protruding pieces in the plastify section, form a set of protruding piece subassembly according to a plurality of protruding pieces that the clearance was arranged along plastify section a week, the plastify section sets up the protruding piece subassembly that the multiunit was arranged according to the clearance, the protruding piece subassembly of multiunit forms gear. The length-diameter ratio of the screw for extruding and molding the low-temperature foaming material is 28-32; the compression ratio of the screw for extrusion molding of the low-temperature foaming material is between 2.1 and 2.4.
The every adjacent two sets of protruding block subassemblies of plastify section between form multichannel plastify recess 8, multichannel plastify recess extends to the plastify section other end from plastify section one end, protruding piece 5 set up to be square structure for the cross-section.
The feeding section comprises feeding section protruding strips, the feeding section protruding strips are arranged in a spiral shape, spiral feeding section spiral grooves are formed between the feeding section protruding strips, and feeding section chamfering angles are arranged on the side faces of the feeding section protruding strips.
The compression section include the protruding strip of compression section, the protruding strip of compression section is the heliciform and arranges, forms spiral helicine compression section helicla flute between the protruding strip of compression section, the protruding strip side of compression section sets up the compression section chamfer.
The homogenization section comprises homogenization section convex strips, the homogenization section convex strips are arranged spirally, a spiral homogenization section spiral groove is formed between the homogenization section convex strips, and homogenization section chamfers are arranged on the side surfaces of the homogenization section convex strips.
Adopt the technical scheme of the utility model, can obtain following beneficial effect:
low temperature foaming material screw rod for extrusion moulding, to the present screw rod design compression ratio among the prior art, draw ratio isoparametric unsuitable and cause the material to extrude the plastify bad or the material is extruded the in-process and is cuted excessively, the temperature can't reduce and the excessive condition of plastify appears, and propose the design improvement. In this application, design the screw rod into four-section type structure, be charging section, compression section, homogenization section and final gear formula plastify section in proper order. Due to the adoption of the structure and the selection of the length-diameter ratio of the screw, the low-temperature foaming material can be completely plasticized in the extrusion molding process, and the problem that the material is excessively plasticized or decomposed in advance due to the excessive shearing of the material and equipment in the plasticizing process can be solved. And the compression ratio is selected, so that the shearing of the material can be effectively reduced in the extrusion molding process of the low-temperature foaming material, the material is smoother in the extrusion process, and the shearing is reduced. Low temperature foaming material screw rod for extrusion moulding, simple structure, it is with low costs, ensure that the screw rod is in low temperature foaming material extrusion moulding technology, low temperature foaming material is more smooth and easy, reduce the shearing in extrusion process, improve the bad phenomenon of goods that low temperature foaming EVA material caused in extrusion process, improve low temperature foaming material extrusion moulding overall quality.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic structural view of a screw for extrusion molding of a low-temperature foamed material according to the present invention;
in the drawings, the reference numbers are respectively: 1. a feeding section; 2. a compression section; 3. a homogenization section; 4. a plasticizing section; 5. a raised block; 6. a bump block assembly; 7. a plasticizing part; 8. plasticizing the groove; 9. a material feeding section is provided with a convex strip; 10. a spiral groove is formed in the feeding section; 11. chamfering the feeding section; 12. compressing the segment raised strips; 13. a compression section spiral groove; 14. Chamfering the compression section; 15. homogenizing section raised strips; 16. a homogenization section spiral groove; 17. and chamfering the homogenizing section.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings, for example, the shapes, structures, mutual positions and connection relations of the components, the functions and operation principles of the components, and the like:
as shown in the attached figure 1, the utility model relates to a screw rod for extruding and molding low-temperature foaming material, which comprises a feeding section 1, a compression section 2, a homogenization section 3 and a plasticizing section 4, wherein the feeding section 1 is arranged at one end of the screw rod for extruding and molding low-temperature foaming material, the plasticizing section 4 is arranged at the other end of the screw rod for extruding and molding low-temperature foaming material, one end of the compression section 2 is connected with the feeding section 1, the other end of the compression section 2 is connected with the homogenization section 3, the other end of the homogenization section 3 is connected with one end of the plasticizing section 4, the section of adding material 1, compression section 2, homogenization section 3, plastify section 4 formula structure as an organic whole, set up a plurality of protruding pieces 5 on the plastify section 4, along 4 a week of plastify section a plurality of protruding pieces 5 that arrange according to the clearance form a set of protruding piece subassembly 6, plastify section 4 sets up the protruding piece subassembly 6 that the multiunit was arranged according to the clearance, multiunit protruding piece subassembly 6 forms gear formula plastify portion 7. The length-diameter ratio of the screw for extruding and molding the low-temperature foaming material is 28-32; the compression ratio of the screw for extrusion molding of the low-temperature foaming material is between 2.1 and 2.4. The structure provides design improvement aiming at the condition that the existing screw in the prior art is unsuitable in parameters such as compression ratio, length-diameter ratio and the like, so that poor material extrusion plasticization is caused, or excessive plasticization is caused due to the fact that the temperature cannot be reduced in the material extrusion process. In this application, design the screw rod into four-section type structure, be charging section, compression section, homogenization section and final gear formula plastify section in proper order. Due to the adoption of the structure and the selection of the length-diameter ratio of the screw, the low-temperature foaming material can be completely plasticized in the extrusion molding process, and the problem that the material is excessively plasticized or decomposed in advance due to the excessive shearing of the material and equipment in the plasticizing process can be solved. And the compression ratio is selected, so that the shearing of the material can be effectively reduced in the extrusion molding process of the low-temperature foaming material, the material is smoother in the extrusion process, and the shearing is reduced. Low temperature foaming material screw rod for extrusion moulding, simple structure, it is with low costs, extrusion moulding is efficient, improves through the structure to the screw rod, ensures that the screw rod is in low temperature foaming material extrusion moulding technology, low temperature foaming material is more smooth and easy, reduce the shearing at the extrusion process, improves the goods bad phenomenon that low temperature foaming EVA material caused in the extrusion process, improves low temperature foaming material extrusion moulding overall quality.
The every adjacent two sets of protruding piece subassemblies 6 of plastify section 4 between form multichannel plastify recess 8, multichannel plastify recess 8 extends to the 4 other ends of plastify section from 4 one end of plastify section, protruding piece 5 set up to be square structure for the cross-section.
Reinforced section 1 include reinforced section protruding strip 9, reinforced section protruding strip 9 is the heliciform and arranges, forms spiral heliciform reinforced section helicla flute 10 between reinforced section protruding strip 9, reinforced section protruding strip 9 side sets up reinforced section chamfer 11. Above-mentioned structure through the setting of chamfer, when carrying out extrusion moulding for the material is more smooth and easy at the extrusion process, reduces the shearing.
The compression section 2 comprises compression section convex strips 12, the compression section convex strips 12 are arranged in a spiral shape, spiral compression section spiral grooves 13 are formed between the compression section convex strips 12, and compression section chamfers 14 are arranged on the side faces of the compression section convex strips 12. Above-mentioned structure through the setting of chamfer, when carrying out extrusion moulding for the material is more smooth and easy at the extrusion process, reduces the shearing.
The homogenizing section 3 comprises homogenizing section convex strips 15, the homogenizing section convex strips 15 are arranged in a spiral shape, spiral homogenizing section spiral grooves 16 are formed between the homogenizing section convex strips 15, and homogenizing section chamfers 17 are arranged on the side faces of the homogenizing section convex strips 15. Above-mentioned structure through the setting of chamfer, when carrying out extrusion moulding for the material is more smooth and easy at the extrusion process, reduces the shearing.
The aspect ratio and the compression ratio mentioned in the present application are terms of the prior art in the screw technology for extrusion molding of low-temperature foaming materials. The meaning of which is understood by the person skilled in the art. The length-diameter ratio of the screw is L/ds. ds is the screw outside diameter and L is the effective length of the threaded portion of the screw. The screw compression ratio epsilon is h1/h 3. I.e., the ratio of the feed section flight depth h1 to the melt section flight depth h 3.
In the screw technology for low-temperature foaming material extrusion molding, a feeding section: mainly carries out compaction and conveying on the low-temperature foaming material. The compression section has the function of further compacting and plasticizing the low-temperature foaming material, the screw groove of the section is of a compression type, and the working process of the compression section is that after the low-temperature foaming material enters the compression section from the feeding section, the screw groove becomes shallow gradually, and high pressure is formed in the low-temperature foaming material along with the continuous forward conveying of the low-temperature foaming material, so that the low-temperature foaming material is compacted gradually. Meanwhile, the low-temperature foaming material starts to melt under the action of external heating from the cylinder and strong stirring, mixing and shearing of the screw and the cylinder, the liquid phase is continuously increased along with the advancing process, the solid phase is continuously reduced to the tail end of the melting, and all or most of the low-temperature foaming material is converted into a viscous state. A homogenizing section: also called homogenizing section or metering section, the low-temperature foaming material is further plasticized after entering the homogenizing section, and is extruded from the screw in a constant pressure, constant quantity and constant temperature manner.
Low temperature foaming material screw rod for extrusion moulding, to the present screw rod design compression ratio among the prior art, draw ratio isoparametric unsuitable and cause the material to extrude the plastify bad or the material is extruded the in-process and is cuted excessively, the temperature can't reduce and the excessive condition of plastify appears, and propose the design improvement. In this application, design the screw rod into four-section type structure, be charging section, compression section, homogenization section and final gear formula plastify section in proper order. Due to the adoption of the structure and the selection of the length-diameter ratio of the screw, the low-temperature foaming material can be completely plasticized in the extrusion molding process, and the problem that the material is excessively plasticized or decomposed in advance due to the excessive shearing of the material and equipment in the plasticizing process can be solved. And the compression ratio is selected, so that the shearing of the material can be effectively reduced in the extrusion molding process of the low-temperature foaming material, the material is smoother in the extrusion process, and the shearing is reduced. Low temperature foaming material screw rod for extrusion moulding, simple structure, it is with low costs, ensure that the screw rod is in low temperature foaming material extrusion moulding technology, low temperature foaming material is more smooth and easy, reduce the shearing in extrusion process, improve the bad phenomenon of goods that low temperature foaming EVA material caused in extrusion process, improve low temperature foaming material extrusion moulding overall quality.
The present invention has been described in detail with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and the present invention can be implemented in various ways without modification, and the present invention is not limited by the above embodiments.
Claims (5)
1. A screw rod for low-temperature foaming material extrusion molding is characterized in that: the screw rod for the low-temperature foaming material extrusion molding comprises a feeding section (1), a compression section (2), a homogenization section (3) and a plasticizing section (4), wherein the feeding section (1) is positioned at one end of the screw rod for the low-temperature foaming material extrusion molding, the plasticizing section (4) is positioned at the other end of the screw rod for the low-temperature foaming material extrusion molding, one end of the compression section (2) is connected with the feeding section (1), the other end of the compression section (2) is connected with the homogenization section (3), the other end of the homogenization section (3) is connected with one end of the plasticizing section (4), the feeding section (1), the compression section (2), the homogenization section (3) and the plasticizing section (4) are of an integrated structure, a plurality of convex blocks (5) are arranged on the plasticizing section (4), a plurality of convex blocks (5) arranged according to a gap along the circumference of the plasticizing section (4) form a group of convex block assemblies (6), and a plurality of groups of convex block assemblies (6) arranged, the multiple groups of convex block assemblies (6) form a gear type plasticizing part (7); the length-diameter ratio of the screw for extruding and molding the low-temperature foaming material is 28-32; the compression ratio of the screw for extrusion molding of the low-temperature foaming material is between 2.1 and 2.4.
2. The screw for extrusion molding of a low-temperature foaming material according to claim 1, wherein: the every adjacent two sets of protruding block group spare (6) of plastify section (4) between form multichannel plastify recess (8), multichannel plastify recess (8) extend to the plastify section (4) other end from plastify section (4) one end, protruding piece (5) set up to be square structure for the cross-section.
3. The screw for extrusion molding of a low-temperature foaming material according to claim 1 or 2, wherein: reinforced section (1) including reinforced section protruding strip (9), reinforced section protruding strip (9) are the heliciform and arrange, form spiral helicine reinforced section helicla flute (10) between reinforced section protruding strip (9), reinforced section protruding strip (9) side sets up reinforced section chamfer (11).
4. The screw for extrusion molding of a low-temperature foaming material according to claim 1 or 2, wherein: the compression section (2) comprises compression section convex strips (12), the compression section convex strips (12) are arranged in a spiral shape, spiral compression section spiral grooves (13) are formed between the compression section convex strips (12), and compression section chamfers (14) are arranged on the side faces of the compression section convex strips (12).
5. The screw for extrusion molding of a low-temperature foaming material according to claim 1 or 2, wherein: homogenization section (3) including homogenization section protruding strip (15), homogenization section protruding strip (15) are the heliciform and arrange, form spiral heliciform homogenization section helicla flute (16) between homogenization section protruding strip (15), homogenization section protruding strip (15) side sets up homogenization section chamfer (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348487.0U CN210880808U (en) | 2019-03-19 | 2019-03-19 | Screw rod for low-temperature foaming material extrusion molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348487.0U CN210880808U (en) | 2019-03-19 | 2019-03-19 | Screw rod for low-temperature foaming material extrusion molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210880808U true CN210880808U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920348487.0U Active CN210880808U (en) | 2019-03-19 | 2019-03-19 | Screw rod for low-temperature foaming material extrusion molding |
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| Country | Link |
|---|---|
| CN (1) | CN210880808U (en) |
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- 2019-03-19 CN CN201920348487.0U patent/CN210880808U/en active Active
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Address after: 241000 Anhui city of Wuhu province Jiujiang Economic Development Zone flying road No. 79 Patentee after: Haicheng new materials (Wuhu) Co., Ltd Address before: 241000 Anhui city of Wuhu province Jiujiang Economic Development Zone flying road No. 79 Patentee before: WUHU HAICHENG RUBBER & PLASTIC Co.,Ltd. |