CN114147937A - Automatic plastic extrusion die of reducing - Google Patents
Automatic plastic extrusion die of reducing Download PDFInfo
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- CN114147937A CN114147937A CN202210117592.XA CN202210117592A CN114147937A CN 114147937 A CN114147937 A CN 114147937A CN 202210117592 A CN202210117592 A CN 202210117592A CN 114147937 A CN114147937 A CN 114147937A
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- die
- reducing
- diameter changing
- diameter
- extrusion
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- 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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an automatic diameter-changing plastic extrusion die, which relates to the technical field of plastic extrusion and comprises a die body and a diameter-changing mechanism, wherein the die body comprises a mouth die and a core die, the core die is arranged in the mouth die in a penetrating manner, an extrusion channel is formed between the mouth die and the core die, and the extrusion channel is provided with an extrusion section; the reducing mechanism comprises a reducing outer die, a reducing inner die and a reducing driving piece, the reducing outer die is movably arranged at one end, close to the extrusion section, of the neck die, the reducing inner die is arranged at one end, close to the extrusion section, of the core die, the reducing inner die penetrates through the reducing outer die, and the output end of the reducing driving piece is connected with the reducing outer die. The automatic diameter-changing plastic extrusion die drives the diameter-changing outer die to move along the central axis direction of the mouth die through the diameter-changing driving piece so as to change the distance between the port of the diameter-changing outer die and the outer wall of the diameter-changing inner die, thereby realizing the wall thickness adjustment of an extrusion pipeline; meanwhile, the reducing outer die is adjusted in the axial direction, so that the phenomenon of uneven wall thickness in the radial direction can be avoided, and the quality of an extruded pipeline is ensured.
Description
Technical Field
The invention relates to the technical field of plastic extrusion, in particular to an automatic diameter-changing plastic extrusion die.
Background
When the plastic extrusion pipe is produced, due to factors such as die clearance and plastic raw material processing performance, the phenomenon that the wall thickness of a product is not consistent with the requirement and cannot be adjusted through a technological means occurs. For example, different dies and core dies are required for producing pipes of different specifications or the same specification and different wall thicknesses at the same time. Differences in material properties also tend to affect the thickness of the product. This results in a very large number of moulds and a complex management with high costs. And the mouth mold and the core mold must be replaced when different specifications are replaced, so that the labor intensity is high and the cost is high.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an automatic diameter-changing plastic extrusion die.
The invention discloses an automatic diameter-changing plastic extrusion die, which comprises:
the die body comprises a mouth die and a core die, the core die is arranged in the mouth die in a penetrating mode, an extrusion channel is formed between the mouth die and the core die, and the extrusion channel is provided with an extrusion section; and
the reducing mechanism comprises a reducing outer die, a reducing inner die and a reducing driving piece, the reducing outer die is movably arranged at one end of the neck die close to the extrusion section, the reducing inner die is arranged at one end of the core die close to the extrusion section, the reducing inner die penetrates through the reducing outer die, and the output end of the reducing driving piece is connected with the reducing outer die;
the reducing driving piece drives the reducing outer die to move along the central axis direction of the mouth die, and the distance between the port of the reducing outer die and the outer wall of the reducing inner die is changed.
According to an embodiment of the present invention, the outer wall of the inner die with variable diameter is an annular inclined surface, and the outer diameter of the inner die with variable diameter gradually decreases or increases from the direction away from the extrusion section to the direction close to the extrusion section.
According to an embodiment of the invention, an inclined position is arranged on the inner wall of the port of the reducing outer die, and the inclined direction of the inclined position is the same as that of the outer wall of the reducing inner die.
According to one embodiment of the invention, the reducing outer die and the mouth die are respectively provided with a limiting step.
According to one embodiment of the invention, the output end of the reducing driving component is connected with the input end of the reducing transmission component, the output end of the reducing transmission component is connected with the reducing outer die, and the reducing driving component drives the reducing transmission component to drive the reducing outer die to move.
According to one embodiment of the invention, the reducing transmission assembly comprises a reducing output part, a reducing transmission part and a reducing linkage part, the reducing output part is connected to the output end of the reducing transmission part, the reducing transmission part is rotatably arranged on the installation part and is connected to the reducing output part through a reducing synchronization part, one end of the reducing transmission part is in threaded connection with the reducing linkage part, and the reducing linkage part is arranged on the reducing outer die.
According to one embodiment of the invention, the direction of the central axis of the variable diameter transmission member is the same as the direction of the central axis of the die.
According to one embodiment of the invention, the output connecting part is arranged on the variable-diameter output part, the transmission connecting part is arranged on the variable-diameter transmission part, the variable-diameter synchronous part is wound on the output connecting part and the transmission connecting part, and the output connecting part and the transmission connecting part are both meshed with the variable-diameter synchronous part.
According to an embodiment of the present invention, the number of the reducing transmission members is plural, the plurality of reducing transmission members are respectively rotatably disposed on the mounting member and respectively connected to the reducing linkage member by threads, and the plurality of reducing transmission members are rotationally symmetric.
According to an embodiment of the invention, the mounting member is further provided with a plurality of rotatable auxiliary transmission members. The reducing synchronous piece is wound on the auxiliary transmission piece, and the auxiliary transmission piece is meshed with the reducing synchronous piece.
Compared with the prior art, the automatic diameter-changing plastic extrusion die has the following advantages:
according to the automatic diameter-changing plastic extrusion die, the diameter-changing outer die is driven by the diameter-changing driving piece to move along the central axis direction of the die, so that the distance between the port of the diameter-changing outer die and the outer wall of the diameter-changing inner die is changed, and the wall thickness of an extrusion pipeline is adjusted; meanwhile, the reducing outer die is adjusted in the axial direction, so that the phenomenon of uneven wall thickness in the radial direction can be avoided, and the quality of an extruded pipeline is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a first schematic structural diagram of an automatic diameter-changing plastic extrusion die in an embodiment;
FIG. 2 is a schematic structural diagram II of the automatic diameter-changing plastic extrusion die in the embodiment;
FIG. 3 is a sectional view of the automatic diameter-changing plastic extrusion die in the embodiment;
FIG. 4 is an enlarged view of area A of FIG. 2;
fig. 5 is an enlarged view of region B in fig. 3.
Description of reference numerals:
1. a mold body; 11. a neck ring mold; 111. a sink bit; 12. a core mold; 121. a feed inlet; 122. a spiral path; 13. an extrusion channel; 131. a material homogenizing section; 132. a bus bar section; 133. an extrusion section; 2. a diameter-changing mechanism; 21. a diameter-variable outer die; 211. a limiting step; 212. inclining; 22. a variable-diameter inner die; 221. an annular inclined plane; 23. a variable diameter driving member; 231. a mounting member; 24. a variable diameter transmission assembly; 241. a variable diameter output member; 2411. an output connection; 242. a variable diameter transmission member; 2421. a transmission connection part; 243. a variable-diameter linkage piece; 2431. a linkage connecting part; 244. an auxiliary transmission member.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1-5, an automatic diameter-changing plastic extrusion die comprises a die body 1 and a diameter-changing mechanism 2, wherein the die body 1 is provided with an extrusion channel 13, the diameter-changing mechanism 2 is arranged at an extrusion section 133 of the extrusion channel 13, and the diameter-changing mechanism 2 is used for adjusting the wall thickness of an extrusion pipeline.
The die body 1 comprises a die 11 and a core die 12, the die 11 is fixedly arranged on a rack, the core die 12 is arranged in the die 11 in a penetrating manner, an extrusion channel 13 is formed between the die 11 and the core die 12, one end of the core die 12 is provided with a feeding hole 121, and the feeding hole 121 is communicated with the extrusion channel 13. The extrusion channel 13 includes a material homogenizing section 131, a confluence section 132 and an extrusion section 133, the material homogenizing section 131 is disposed near the feed inlet 121, and the confluence section 132 is disposed between the material homogenizing section 131 and the extrusion section 133.
Further, the inner wall of the neck mold 11 corresponding to the material homogenizing section 131 is a cylindrical surface, and the inner diameter of the neck mold 11 corresponding to the material homogenizing section 131 is slightly larger than the outer diameter of the core mold 12. A plurality of spiral channels 122 are arranged on the outer wall of the core mold 12 corresponding to the homogenizing section 131, and the spiral channels 122 are all communicated with the feed inlet 121. The melted material enters the material homogenizing section 131 through the feeding hole 121, and is uniformly melted through the matching of the spiral channel 122 and the inner wall of the neck ring mold 11, so that the influence of the non-uniform melted material on the wall thickness of the extrusion pipeline is avoided.
Furthermore, at least one confluence position 111 is arranged on the inner wall of the mouth mold 11 corresponding to the confluence section 132, and the confluence position 111 is an inward concave curved surface; the outer wall of the core die 12 is cylindrical in shape corresponding to the bus bar 132. The melted material flows into the confluence position 111 after passing through the material homogenizing section 131, and then flows to the extruding section 133 uniformly after gathering, so that the wall thickness of the extruding pipeline is further ensured to be uniform. In this embodiment, the number of the bus bits 111 is two.
Further, the inner wall of the die 11 corresponding to the extrusion section 133 is a cylindrical surface, and correspondingly, the outer wall of the core mold 12 corresponding to the extrusion section 133 is a cylindrical surface.
The reducing mechanism 2 comprises a reducing outer die 21, a reducing inner die 22, a reducing driving part 23 and a reducing transmission assembly 24, the reducing driving part 23 drives the reducing transmission assembly 24 to drive the reducing outer die 21 to move along the central axis direction of the mouth die 11, the position of the reducing inner die 22 is fixed, and the wall thickness of the extruded pipe is adjusted through the change of the relative positions of the reducing outer die 21 and the reducing inner die 22.
Specifically, the reducing outer die 21 is movably disposed at an end of the mouth die 11 close to the extrusion section 133, and the reducing outer die 21 moves along a central axis direction of the mouth die 11. The reducing inner die 22 is fixedly installed at one end of the core die 12, and the reducing inner die 22 penetrates through the reducing outer die 21. The reducing outer die 21 and the mouth die 11 are respectively provided with a limiting step 211, and the moving stroke of the reducing outer die 21 is limited by the matching of the two limiting steps 211. The outer wall of the inner die 22 with variable diameter is in smooth transition with the outer wall of the core die 12.
Further, the outer wall of the inner reducing die 22 is an annular inclined surface 221, that is, the outer diameter of the inner reducing die 22 gradually decreases or increases from the extrusion section 133 to the refining section 131, and when the outer reducing die 21 moves along the central axis direction of the mouth die 11, the distance between the port of the outer reducing die 21 and the outer wall of the inner reducing die 22 changes, thereby realizing the adjustment of the wall thickness of the extrusion pipeline.
In this embodiment, the outer diameter of the inner variable-diameter die 22 gradually decreases from the extrusion section 133 to the refining section 131, that is, the inner variable-diameter die 22 is in the shape of a circular truncated cone, and the outer wall of the inner variable-diameter die 22 is the side surface of the circular truncated cone. When the reducing outer die 21 moves away from the die 11, the distance between the port of the reducing outer die 21 and the outer wall of the reducing inner die 22 becomes smaller, so that the wall thickness of the extruded pipe becomes thinner.
Further, the inclined position 212 is arranged on the inner wall of the port of the reducing outer die 21, and the inclined direction of the inclined position 212 is matched with the inclined direction of the outer wall of the reducing inner die 22, so that the inclined position 212 is matched with the outer wall of the reducing inner die 22, the wall thickness of an extruded pipeline can be ensured, and the quality of the extruded pipeline can be improved.
The reducing driving piece 23 is fixedly installed on the mouth mold 11 through the installation piece 231, the output end of the reducing driving piece 23 is connected with the input end of the reducing transmission assembly 24, the output end of the reducing transmission assembly 24 is connected with the reducing outer mold 21, and the reducing driving piece 23 drives the reducing transmission assembly 24 to drive the reducing outer mold 21 to move along the central axis direction of the mouth mold 11.
The variable diameter transmission assembly 24 includes a variable diameter output element 241, a variable diameter transmission element 242, and a variable diameter linkage element 243. The reducing output part 241 is connected to the output end of the reducing driving part 23 and rotates with the output end of the reducing driving part 23. The reducer transmission 242 is rotatably mounted to the mounting member 231 and is connected to the reducer output member 241 by a reducer synchronizer. The central axis direction of the reducing transmission piece 242 is the same as the central axis direction of the mouth mold 11, one end of the reducing transmission piece 242 is in threaded connection with a reducing linkage piece 243, and the reducing linkage piece 243 is fixedly connected to the reducing outer mold 21. The reducing driving part 23 drives the reducing output part 241 to rotate, the rotation of the reducing output part 241 drives the reducing transmission part 242 to rotate through the reducing synchronous part, the rotation is converted into linear movement through the threaded connection of the reducing transmission part 242 and the reducing linkage part 243, the reducing linkage part 243 is driven to linearly move along the central axis direction of the mouth mold 11, and therefore the reducing outer mold 21 is driven to linearly move along the central axis direction of the mouth mold 11.
Furthermore, an output connecting part 2411 is arranged on the reducing output part 241, a transmission connecting part 2421 is arranged on the reducing transmission part 242, the reducing synchronous part is wound on the output connecting part 2411 and the transmission connecting part 2421, and the output connecting part 2411 and the transmission connecting part 2421 are both meshed with the reducing synchronous part. The variable diameter linkage member 243 is provided with a linkage connection portion 2431, and the linkage connection portion 2431 is in threaded connection with one end of the variable diameter transmission member 242.
Further, in order to improve the stability and reliability of the transmission, the number of the variable diameter transmission members 242 is plural. The reducing transmission members 242 are rotatably mounted on the mounting member 231, the reducing transmission members 242 are rotationally symmetric, and the reducing synchronous members are wound on the transmission connection portions 2421 of the output connection portion 2411 and the reducing transmission members 242. Correspondingly, the linkage connection portions 2431 with the same number as that of the reducing transmission members 242 are arranged on the reducing linkage member 243, and the reducing transmission members 242 are in threaded connection with the linkage connection portions 2431 one by one. In addition, a plurality of rotatable auxiliary transmission members 244 are provided on the mounting member 231. The reducer synchronizing member is wound around the auxiliary transmission member 244, and the auxiliary transmission member 244 is engaged with the reducer synchronizing member, in order to further improve the stability and reliability of the transmission. In this embodiment, the output connection portion 2411, the transmission connection portion 2421, the linkage connection portion 2431 and the auxiliary transmission member 244 are all sprockets, and the diameter-changing synchronous member is a chain.
In the specific application: the melt is fed into the feed port 121 from the extruder, and the melt flows into the homogenizing section 131 through the feed port 121, and then passes through the converging section 132 and is extruded through the extruding section 133. In the process, the wall thickness of the extrusion pipeline is detected in real time through a wall thickness detection device, if the wall thickness of the extrusion pipeline is not qualified, the reducing driving piece 23 drives the reducing output piece 241 to rotate, the rotation of the reducing output piece 241 drives the reducing transmission piece 242 to rotate through the reducing synchronous piece, the rotation is converted into linear movement through the threaded connection of the reducing transmission piece 242 and the reducing linkage piece 243, the reducing linkage piece 243 is driven to perform linear movement along the direction of the central shaft of the port die 11, so that the reducing outer die 21 is driven to perform linear movement along the direction of the central shaft of the port die 11, the distance between the port of the reducing outer die 21 and the outer wall of the reducing inner die 22 is changed, and the wall thickness of the extrusion pipeline is adjusted.
In addition, in actual production, it is feasible to draw a tube blank with a larger tube diameter to manufacture a product with a smaller tube diameter, but shrinkage is not uniform due to variation of drawing conditions, such as different tube diameters. The automatic diameter-changing plastic extrusion die well meets the online and random gap adjustment through the variable gap adjustment, thereby meeting the requirements of different pipe diameters.
In summary, the automatic diameter-changing plastic extrusion die drives the diameter-changing outer die to move along the central axis direction of the die through the diameter-changing driving piece, so as to change the distance between the port of the diameter-changing outer die and the outer wall of the diameter-changing inner die, and further realize the wall thickness adjustment of the extrusion pipeline; meanwhile, the reducing outer die is adjusted in the axial direction, so that the phenomenon of uneven wall thickness in the radial direction can be avoided, and the quality of an extruded pipeline is ensured.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides an automatic plastic extrusion die of reducing which characterized in that includes:
the die body (1) comprises a die (11) and a core die (12), wherein the core die (12) is arranged in the die (11) in a penetrating way, an extrusion channel (13) is formed between the die (11) and the core die (12), and the extrusion channel (13) is provided with an extrusion section (133); and
the reducing mechanism (2) comprises a reducing outer die (21), a reducing inner die (22) and a reducing driving piece (23), the reducing outer die (21) is movably arranged at one end, close to the extrusion section (133), of the mouth die (11), the reducing inner die (22) is arranged at one end, close to the extrusion section (133), of the core die (12), the reducing inner die (22) penetrates through the reducing outer die (21), and the output end of the reducing driving piece (23) is connected with the reducing outer die (21);
the reducing driving piece (23) drives the reducing outer die (21) to move along the central axis direction of the mouth die (11), and the distance between the port of the reducing outer die (21) and the outer wall of the reducing inner die (22) is changed.
2. The plastic extrusion die with the automatic diameter changing function as claimed in claim 1, wherein the outer wall of the inner die with the diameter changing function (22) is an annular inclined surface (221), and the outer diameter of the inner die with the diameter changing function (22) is gradually reduced or increased from a position far away from the extrusion section (133) to a position close to the extrusion section (133).
3. The plastic extrusion die with the automatic diameter changing function as claimed in claim 1, wherein an inclined position (212) is arranged on the inner wall of the port of the outer diameter changing die (21), and the inclined direction of the inclined position (212) is the same as that of the outer wall of the inner diameter changing die (22).
4. The plastic extrusion die with the automatic diameter changing function as claimed in claim 1, wherein the diameter changing outer die (21) and the neck die (11) are respectively provided with a limiting step (211).
5. The plastic extrusion die with the automatic diameter changing function as claimed in claim 1, wherein an output end of the diameter changing driving piece (23) is connected with an input end of a diameter changing transmission assembly (24), an output end of the diameter changing transmission assembly (24) is connected with the diameter changing outer die (21), and the diameter changing driving piece (23) drives the diameter changing transmission assembly (24) to drive the diameter changing outer die (21) to move.
6. The plastic extrusion die with the automatic diameter changing function as claimed in claim 5, wherein the diameter changing transmission assembly (24) comprises a diameter changing output part (241), a diameter changing transmission part (242) and a diameter changing linkage part (243), the diameter changing output part (241) is connected to the output end of the diameter changing driving part (23), the diameter changing transmission part (242) is rotatably arranged on the installation part (231), the diameter changing transmission part (242) is connected to the diameter changing output part (241) through a diameter changing synchronous part, one end of the diameter changing transmission part (242) is in threaded connection with the diameter changing linkage part (243), and the diameter changing linkage part (243) is arranged on the diameter changing outer die (21).
7. The plastic extrusion die with automatic diameter changing as claimed in claim 6, wherein the direction of the central axis of the diameter changing transmission member (242) is the same as the direction of the central axis of the die (11).
8. The plastic extrusion die with the automatic diameter changing function as claimed in claim 6, wherein an output connecting part (2411) is arranged on the diameter changing output part (241), a transmission connecting part (2421) is arranged on the diameter changing transmission part (242), the diameter changing synchronous part is wound on the output connecting part (2411) and the transmission connecting part (2421), and the output connecting part (2411) and the transmission connecting part (2421) are both meshed with the diameter changing synchronous part.
9. The plastic extrusion die with the automatic diameter changing function as claimed in claim 8, wherein the number of the diameter changing transmission members (242) is plural, the diameter changing transmission members (242) are respectively rotatably disposed on the mounting member (231) and respectively connected with the diameter changing linkage member (243) in a threaded manner, and the diameter changing transmission members (242) are rotationally symmetrical.
10. The plastic extrusion die with automatic diameter changing of claim 9, wherein a plurality of rotatable auxiliary transmission members (244) are further provided on the mounting member (231); the reducing synchronous piece is wound on the auxiliary transmission piece (244), and the auxiliary transmission piece (244) is meshed with the reducing synchronous piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210117592.XA CN114147937A (en) | 2022-02-08 | 2022-02-08 | Automatic plastic extrusion die of reducing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210117592.XA CN114147937A (en) | 2022-02-08 | 2022-02-08 | Automatic plastic extrusion die of reducing |
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| Publication Number | Publication Date |
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| CN114147937A true CN114147937A (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210117592.XA Pending CN114147937A (en) | 2022-02-08 | 2022-02-08 | Automatic plastic extrusion die of reducing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115056454A (en) * | 2022-08-11 | 2022-09-16 | 江苏旭科新材料有限公司 | High leakproofness extruder suitable for PVC cable material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208841802U (en) * | 2018-09-19 | 2019-05-10 | 贵阳学院 | A kind of extruder with improvement barrel |
| CN113083927A (en) * | 2021-03-29 | 2021-07-09 | 西南铝业（集团）有限责任公司 | Variable-section pipe extrusion forming device and extruder |
| CN215589901U (en) * | 2021-06-04 | 2022-01-21 | 张家港市华德机械科技有限公司 | Extrusion die with adjustable pipe diameter |
-
2022
- 2022-02-08 CN CN202210117592.XA patent/CN114147937A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208841802U (en) * | 2018-09-19 | 2019-05-10 | 贵阳学院 | A kind of extruder with improvement barrel |
| CN113083927A (en) * | 2021-03-29 | 2021-07-09 | 西南铝业（集团）有限责任公司 | Variable-section pipe extrusion forming device and extruder |
| CN215589901U (en) * | 2021-06-04 | 2022-01-21 | 张家港市华德机械科技有限公司 | Extrusion die with adjustable pipe diameter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115056454A (en) * | 2022-08-11 | 2022-09-16 | 江苏旭科新材料有限公司 | High leakproofness extruder suitable for PVC cable material |
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Application publication date: 20220308 |