CN112917873A - Three-layer co-extrusion adjustable eccentric wire and cable extruder head - Google Patents
Three-layer co-extrusion adjustable eccentric wire and cable extruder head Download PDFInfo
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- CN112917873A CN112917873A CN202110336036.7A CN202110336036A CN112917873A CN 112917873 A CN112917873 A CN 112917873A CN 202110336036 A CN202110336036 A CN 202110336036A CN 112917873 A CN112917873 A CN 112917873A
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Classifications
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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
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/336—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die
- B29C48/3366—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging one by one down streams in the die using a die with concentric parts, e.g. rings, cylinders
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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
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/143—Insulating conductors or cables by extrusion with a special opening of the extrusion head
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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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
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3462—Cables
Abstract
The invention provides a three-layer co-extrusion adjustable eccentric electric wire and cable extruder head, which comprises: the casing, outer shunt, the assembly is inside the casing, outer shunt and casing taper fit locking, go out the bush through the outer exit of screw assembly on outer shunt, the intermediate level shunt, the assembly is inside outer shunt, go out the bush through the intermediate level of screw assembly on the intermediate level shunt, the inlayer shunt, the assembly is inside the intermediate level shunt, mold core pole and bulb, the assembly is inside the inlayer shunt, the total four equipartitions of third tuningout screw are on the circumference of inlayer shunt, the mold core, assemble on the bulb through the screw, first tuningout screw, the assembly is on first tuningout screw seat, first tuningout screw directly pushes up on the external diameter of mold sleeve seat, the total four equipartitions of second tuningout screw are on the circumference of casing. The head can simultaneously extrude three layers of three different or identical materials, and the head structurally supports independent adjustment of the eccentricity of each layer.
Description
Technical Field
The invention relates to a three-layer co-extrusion adjustable eccentric electric wire and cable extruder head, belonging to the technical field of electric wire and cable production.
Background
In the current high-voltage cable production field, the structure of the high-voltage cable aluminum sheath is mostly a corrugated aluminum sheath, the machine head used by the sheath is a traditional double-layer machine head, namely, only two layers of materials can be extruded simultaneously, for another high-voltage cable with a smooth aluminum sheath structure, generally, a layer of adhesion promoter is added on the outer surface of the aluminum sheath, most of the adhesion promoter is hot melt adhesive material, then a plastic sheath layer and a semi-conductive layer are coated outside the adhesion promoter, namely, the machine head is required to extrude three layers of materials simultaneously and coat on a cable core, the traditional cable extrusion machine head can only realize double-layer simultaneous extrusion, and can not realize one-step extrusion of the high-voltage cable hot melt adhesive layer, the plastic sheath and the semi-conductive three layers, under the condition, the current proper method is to coat a layer of hot melt adhesive layer through other equipment before the core enters the machine head, and the eccentricity rate and the, seriously affecting the quality of the cable product.
Disclosure of Invention
The invention aims to provide a three-layer co-extrusion adjustable eccentric wire and cable extruder head, which is suitable for simultaneously extruding three layers of common plastics of various high-voltage cables such as PVC, PE, LSZH, hot melt adhesive and the like, and is particularly suitable for extruding the three layers of smooth aluminum sheath structures of the high-voltage cables at one time. Meanwhile, the concentricity of each layer can be independently adjusted in the production process of the cable by the machine head, so that the eccentricity problem in the production process of the cable is reduced, and the thickness uniformity of each layer is ensured.
The invention adopts the following technical scheme:
the utility model provides an adjustable eccentric electric wire and cable extruder head is crowded altogether to three-layer which characterized in that includes:
the shell body, an outer layer shunt assembled inside the shell body and used for shunting outer layer molten plastics, the outer layer shunt is locked with the shell body in a taper fit manner, an outer layer outlet die assembled on the outer layer shunt through threads, an intermediate layer shunt assembled inside the outer layer shunt and used for shunting intermediate layer molten plastics, the intermediate layer shunt is locked with the outer layer shunt in a taper fit manner, the intermediate layer outlet die assembled on the intermediate layer shunt through threads, the inner layer shunt is assembled inside the intermediate layer shunt and used for shunting inner layer molten plastics, the inner layer shunt is locked with the intermediate layer shunt in a taper fit manner, a mold core rod and a ball head are assembled inside the inner layer shunt, the mold core rod and the ball head are connected through threads, the mold core rod is fixed inside the inner layer shunt through an ejection block, the ball head is in spherical contact with the inner layer shunt, and four third deviation adjusting screws are uniformly, the front end of a third deviation adjusting screw is directly abutted to the outer diameter of a mold core rod, a mold core is assembled on a ball head through threads, an outer deviation adjusting seat is assembled inside a shell, a mold sleeve seat is assembled inside the front end of the shell, a mold sleeve is assembled inside the mold sleeve seat, a mold sleeve gland is assembled on the mold sleeve seat through threads, a first deviation adjusting screw is assembled on the first deviation adjusting screw seat, the first deviation adjusting screw is uniformly distributed on the circumference of the shell, the first deviation adjusting screw is directly abutted to the outer diameter of the mold sleeve seat, a second deviation adjusting screw is assembled on the second deviation adjusting screw seat, the second deviation adjusting screw is uniformly distributed on the circumference of the shell, and the second deviation adjusting screw is directly abutted to the outer diameter of the outer deviation adjusting seat.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: the outer layer shunt is locked with the shell through taper fit of a first locking screw.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: the middle layer shunt is locked with the outer layer shunt through taper fit of a second locking screw.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: the inner layer shunt is locked with the middle layer shunt through the third locking screw in a taper fit mode.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: the die sleeve seat is provided with a die sleeve seat gland which is assembled on the shell, and the die sleeve seat gland fixes the die sleeve seat on the outer layer deviation adjusting seat through a fourth locking screw.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: the outer-layer deviation adjusting seat gland is assembled inside the shell and fixes the outer-layer deviation adjusting seat on the shell through a fifth locking screw.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: the shell is provided with an outer layer glue inlet and a middle layer glue inlet, and the middle layer shunt is provided with an inner layer glue inlet.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: be equipped with outer passageway between outer shunt and the casing, be equipped with intermediate level passageway between intermediate level shunt and the outer shunt, be equipped with the inlayer passageway between inlayer shunt and the intermediate level shunt, be equipped with outlet channel between mold core and the die sleeve, outer passageway, intermediate level passageway and inlayer passageway are linked together with outlet channel in intermediate level export mould the place ahead, the outer jiao kou that advances is linked together with outer passageway, the intermediate level advances jiao kou and is linked together with the intermediate level passageway, the inlayer advances jiao kou and is linked together with the inlayer passageway.
Further, the three-layer co-extrusion adjustable eccentric electric wire and cable extruder head disclosed by the invention also has the following characteristics: the outside of the shell is provided with a heating device.
The invention achieves the following effects through a brand new design of the machine head structure:
1. compared with the traditional double-layer machine head which can only extrude double layers at the same time, the machine head can extrude three layers of different or same materials at the same time, and the materials include but are not limited to various wire and cable insulation and sheath materials such as PVC, PE, LSZH, hot melt adhesive and the like.
2. This aircraft nose satisfies the three-layer when crowded altogether, and the accessible is changed specific mould and is realized the double-deck and single-layer and double-colored extrusion of traditional aircraft nose, reaches the purpose of a tractor serves several purposes, reduces unnecessary purchasing cost.
3. Meanwhile, the machine head structurally supports independent adjustment of eccentricity of each layer, the eccentricity problem in the cable production process is effectively solved, the eccentricity is not required to be adjusted again after the eccentricity is adjusted for the first time, the mold core and the mold sleeve are replaced, manpower and working hours are greatly saved, and waste of raw materials is reduced.
4. The reasonable flow channel design can ensure the thickness uniformity of each layer.
5. The aircraft nose is furnished with dedicated extracting tool, makes things convenient for the dismouting of aircraft nose spare part.
Drawings
FIG. 1 is a schematic cross-sectional view of an extruder head for three-layer co-extrusion adjustable eccentric wires and cables according to the present invention.
The reference numbers: 1. a housing; 2. an outer layer shunt; 3. an intermediate layer shunt; 4. an inner layer shunt; 5. a mandrel bar; 6. a ball head; 7. a mold core; 8. die sleeve; 9. pressing a cover by a die sleeve; 10. a die sleeve seat; 11. a die sleeve seat gland; 12. an outer layer deviation adjusting seat gland; 13. an outer layer deviation adjusting seat; 14. a first offset screw base; 15. a first offset screw; 16. a second offset screw seat; 17. a second offset screw; 21. a first locking screw; 23. an outer layer outlet die; 31. a second locking screw; 33. an outlet die of the middle layer; 41. a third locking screw; 42. an inner layer offset adjusting screw; 51. ejecting a block; 71. an outer layer channel; 72. an intermediate layer channel; 73. an inner layer channel; 74. an outlet channel; 81. an outer layer glue inlet; 82. a middle layer glue inlet; 83. an inner layer glue inlet; 111. a fourth locking screw; 121. fifth locking screw
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the three-layer co-extrusion adjustable eccentric electric wire and cable extrusion machine head and the die comprise:
the shell 1 is provided with an outer layer glue inlet 81 and an intermediate layer glue inlet 82 on the shell 1.
The outer layer shunt 2 is assembled inside the shell 1 and used for shunting outer layer molten plastics, the outer layer shunt 2 is locked with the shell 1 through a first locking screw 21 in a taper fit mode, and an outer layer channel 71 is arranged between the outer layer shunt 2 and the shell 1.
Outer layer outlet mould 23 assembles on outer layer shunt 2, and outer layer outlet mould 23 is threaded connection with outer layer shunt 2's connected mode, and the accessible is changed different outer layer outlet mould 23 and is realized different extrusion effect to the outer layer, if change the thickness of outer plastics.
An intermediate layer splitter 3, which is fitted inside the outer layer splitter 2 for splitting the intermediate layer molten plastic. The intermediate layer shunt 3 is locked with the outer layer shunt 2 through the taper fit of the second locking screw 31, the inner layer glue inlet 83 is arranged on the intermediate layer shunt 3, and an intermediate layer channel 72 is arranged between the intermediate layer shunt 3 and the outer layer shunt 2.
An intermediate layer outlet die 33 is fitted on the intermediate layer splitter 3. The connection of the intermediate layer outlet die 33 to the intermediate layer splitter 3 is a threaded connection. Different extrusion effects can be achieved for the intermediate layer by replacing different intermediate layer outlet dies 33, such as changing the thickness of the intermediate layer plastic.
An inner layer divider 4, fitted inside the intermediate layer divider 3, for dividing the inner layer molten plastic. The inner shunt 4 is locked with the intermediate shunt 3 by taper fitting through a third locking screw 41. A third offset screw 42, and a third offset screw 42 fitted to the inner shunt 4 for adjusting the inner eccentricity. An inner channel 73 is provided between the inner layer splitter 4 and the intermediate layer splitter 3.
And the core bar 5 and the ball head 6 are assembled inside the inner layer shunt 4 and used for adjusting the eccentricity of the inner layer. The mold core rod 5 is connected with the ball head 6 through threads, the mold core rod 5 is fixed inside the inner layer shunt 4 through the ejection block 51, the ball head 6 is in spherical contact with the inner layer shunt 4, four third deviation-adjusting screws 42 are uniformly distributed on the circumference of the inner layer shunt 4, the third deviation-adjusting screws 42 directly abut against the outer diameter of the mold core rod 5, the mold core 7 is assembled on the ball head 6 through threads, and the adjustment of the pointing positions of the ball head 6 and the mold core 7 can be realized only by adjusting the third deviation-adjusting screws 42 through a lever principle, so that the adjustment of the inner layer eccentricity is realized.
And an outer layer offset seat 13 which is assembled inside the front end of the shell 1. And the outer layer offset seat gland 12 is assembled inside the shell 1. The outer layer deviation adjusting seat gland 12 fixes the outer layer deviation adjusting seat 13 on the shell 1 through a fifth locking screw 121.
And the die sleeve seat 10 is assembled inside the shell 1 and is positioned in front of the outer layer deviation adjusting seat 13. The die sleeve 8 is assembled inside the die sleeve seat 10. And the die sleeve gland 9 is sleeved on the die sleeve 8 and assembled on the die sleeve seat 10 through threads, and the die sleeve gland 9 drives the die sleeve 8 to move. The relative position of the die sleeve 8 in the die sleeve seat 10 can be controlled by adjusting the position of the die sleeve gland 9.
And the die sleeve seat gland 11 is assembled on the shell 1. The die sleeve seat gland 11 fixes the die sleeve seat 10 on the outer layer deviation adjusting seat 13 through a fourth locking screw 111.
And a first offset screw seat 14 assembled on the shell 1, and a first offset screw 15 assembled on the first offset screw seat 14. The first deviation adjusting screws 15 are uniformly distributed on the circumference of the shell 1, the first deviation adjusting screws 15 directly prop against the outer diameter of the die sleeve seat 10, and the relative position of the die sleeve seat 10 can be adjusted by controlling the first deviation adjusting screws 15, so that the adjustment of the eccentricity of the middle layer is realized.
The second deviation-adjusting screw seat 16 assembled on the shell 1 and the second deviation-adjusting screw 17 assembled on the second deviation-adjusting screw seat 16 are uniformly distributed on the circumference of the shell 1, the second deviation-adjusting screw 17 directly abuts against the outer diameter of the outer deviation-adjusting seat 13, and the relative position of the outer deviation-adjusting seat 13 can be adjusted by controlling the second deviation-adjusting screw 17, so that the adjustment of the outer eccentricity is realized.
An outlet passage 74 is arranged between the mold core 7 and the mold sleeve 8, the outer layer passage 71, the middle layer passage 72 and the inner layer passage 73 are communicated with the outlet passage 74 in front of the middle layer outlet mold 33, the outer layer glue inlet 81 is communicated with the outer layer passage 71, the middle layer glue inlet 82 is communicated with the middle layer passage 72, and the inner layer glue inlet 83 is communicated with the inner layer passage 73.
The specific shapes and styles of the outer layer channel 71, the middle layer channel 72 and the inner layer channel 73 can be designed differently according to different melts, and the main function of the design is to ensure that the melts can flow in a circle uniformly towards the direction of the outlet channel 74 after entering the outer layer channel 71, the middle layer channel 72 and the inner layer channel 73 from the outer layer glue inlet 81, the middle layer glue inlet 82 and the inner layer glue inlet 83 respectively.
The outside heating device that is equipped with of casing 1, the aircraft nose can heat at first when using, inside later the extruder will inject the fuse-element into the aircraft nose, outer fuse-element can advance jiao kou 81 through the skin and enter into outer layer passageway 71, the fuse-element of intermediate level can advance jiao kou 82 through the intermediate level and enter into intermediate level passageway 72, the fuse-element of inlayer can advance jiao kou 83 through the inlayer and enter into inlayer passageway 73, and finally all three-layer fuse-elements can the round even merge and final cladding accomplish the production of product on the heart yearn of cable product in export passageway 74 department.
Claims (9)
1. The utility model provides an adjustable eccentric electric wire and cable extruder head is crowded altogether to three-layer which characterized in that includes:
a shell body, a plurality of first connecting rods and a plurality of second connecting rods,
the outer layer splitter is assembled in the shell and used for splitting outer layer molten plastics, the outer layer splitter is locked with the shell in a taper fit manner and is assembled on an outer layer outlet die on the outer layer splitter through threads,
the middle layer splitter is assembled inside the outer layer splitter and used for splitting the middle layer molten plastic, the middle layer splitter and the outer layer splitter are locked in a taper fit mode and assembled on a middle layer outlet die on the middle layer splitter through threads,
the inner layer shunt is assembled in the middle layer shunt and used for shunting the inner layer molten plastic, the inner layer shunt and the middle layer shunt are locked in a taper fit manner,
the mold core rod and the ball head are assembled inside the inner layer shunt, the mold core rod and the ball head are connected through threads, the mold core rod is fixed inside the inner layer shunt through the ejection block, the ball head is in spherical contact with the inner layer shunt,
the third deviation-adjusting screws are uniformly distributed on the circumference of the inner layer shunt, the front ends of the third deviation-adjusting screws are directly propped against the outer diameter of the core rod,
the mold core is assembled on the ball head through threads,
an outer layer deviation adjusting seat which is assembled inside the shell,
a die sleeve seat which is assembled inside the front end of the shell,
the die sleeve is assembled in the die sleeve seat,
a die sleeve gland is assembled on the die sleeve seat through threads,
the first deviation adjusting screws are assembled on the first deviation adjusting screw seat, the first deviation adjusting screws are four in number and are uniformly distributed on the circumference of the shell, the first deviation adjusting screws are directly propped against the outer diameter of the die sleeve seat,
the second deviation adjusting screw is assembled on the second deviation adjusting screw seat, four second deviation adjusting screws are uniformly distributed on the circumference of the shell, and the second deviation adjusting screw directly abuts against the outer diameter of the outer deviation adjusting seat.
2. The triple-layer co-extrusion adjustable eccentric electric wire and cable extruder head of claim 1, characterized in that:
the outer layer shunt is locked with the shell through taper fit of a first locking screw.
3. The triple-layer co-extrusion adjustable eccentric electric wire and cable extruder head of claim 1, characterized in that:
the middle layer shunt is locked with the outer layer shunt through taper fit of a second locking screw.
4. The triple-layer co-extrusion adjustable eccentric electric wire and cable extruder head of claim 1, characterized in that:
the inner layer shunt is locked with the middle layer shunt through the third locking screw in a taper fit mode.
5. The triple-layer co-extrusion adjustable eccentric electric wire and cable extruder head of claim 1, characterized in that:
the die sleeve seat is provided with a die sleeve seat gland which is assembled on the shell, and the die sleeve seat gland fixes the die sleeve seat on the outer layer deviation adjusting seat through a fourth locking screw.
6. The triple-layer co-extrusion adjustable eccentric electric wire and cable extruder head of claim 1, characterized in that:
the outer-layer deviation adjusting seat gland is assembled inside the shell and fixes the outer-layer deviation adjusting seat on the shell through a fifth locking screw.
7. The triple-layer co-extrusion adjustable eccentric electric wire and cable extruder head of claim 1, characterized in that:
the shell is provided with an outer layer glue inlet and a middle layer glue inlet, and the middle layer shunt is provided with an inner layer glue inlet.
8. The triple co-extrusion adjustable eccentric wire and cable extruder head of claim 7, characterized in that:
an outer layer channel is arranged between the outer layer shunt and the shell,
a middle layer channel is arranged between the middle layer shunt and the outer layer shunt,
an inner layer channel is arranged between the inner layer shunt and the middle layer shunt,
an outlet channel is arranged between the mold core and the mold sleeve, the outer layer channel, the middle layer channel and the inner layer channel are communicated with the outlet channel in front of the middle layer outlet mold, the outer layer glue inlet is communicated with the outer layer channel, the middle layer glue inlet is communicated with the middle layer channel, and the inner layer glue inlet is communicated with the inner layer channel.
9. The triple-layer co-extrusion adjustable eccentric electric wire and cable extruder head of claim 1, characterized in that:
the outside of the shell is provided with a heating device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336036.7A CN112917873A (en) | 2021-03-29 | 2021-03-29 | Three-layer co-extrusion adjustable eccentric wire and cable extruder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336036.7A CN112917873A (en) | 2021-03-29 | 2021-03-29 | Three-layer co-extrusion adjustable eccentric wire and cable extruder head |
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| Publication Number | Publication Date |
|---|---|
| CN112917873A true CN112917873A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110336036.7A Pending CN112917873A (en) | 2021-03-29 | 2021-03-29 | Three-layer co-extrusion adjustable eccentric wire and cable extruder head |
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| CN (1) | CN112917873A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113815214A (en) * | 2021-09-17 | 2021-12-21 | 双研精密机械(常州)有限公司 | Fine-adjustment high-precision four-layer co-extrusion machine head |
| CN114193734A (en) * | 2021-12-30 | 2022-03-18 | 丰果(中国)有限公司 | Three-layer high-strength antibacterial pipe extrusion die |
-
2021
- 2021-03-29 CN CN202110336036.7A patent/CN112917873A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113815214A (en) * | 2021-09-17 | 2021-12-21 | 双研精密机械(常州)有限公司 | Fine-adjustment high-precision four-layer co-extrusion machine head |
| CN113815214B (en) * | 2021-09-17 | 2022-05-27 | 双研精密机械(常州)有限公司 | Fine-adjustment high-precision four-layer co-extrusion machine head |
| CN114193734A (en) * | 2021-12-30 | 2022-03-18 | 丰果(中国)有限公司 | Three-layer high-strength antibacterial pipe extrusion die |
| CN114193734B (en) * | 2021-12-30 | 2023-10-31 | 丰果(中国)有限公司 | Three-layer high-strength antibacterial pipe extrusion die |
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