CN115751679A - Fresh air pipe and forming process thereof - Google Patents
Fresh air pipe and forming process thereof Download PDFInfo
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- CN115751679A CN115751679A CN202211393564.7A CN202211393564A CN115751679A CN 115751679 A CN115751679 A CN 115751679A CN 202211393564 A CN202211393564 A CN 202211393564A CN 115751679 A CN115751679 A CN 115751679A
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 229920003023 plastic Polymers 0.000 claims abstract description 17
- 239000004033 plastic Substances 0.000 claims abstract description 17
- 238000001125 extrusion Methods 0.000 claims abstract description 13
- 239000000243 solution Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 10
- 239000011241 protective layer Substances 0.000 claims description 10
- 238000001746 injection moulding Methods 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 5
- 238000000071 blow moulding Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0245—Manufacturing or assembly of air ducts; Methods therefor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Duct Arrangements (AREA)
Abstract
The application provides a fresh air pipe and a forming process thereof, wherein the forming process of the fresh air pipe comprises the following steps: s1: obtaining an elliptical tube mould with an elliptical cross section, and arranging an extrusion machine head on the periphery of one end of the elliptical tube mould; s2: controlling the elliptical tube die to rotate and pass through the extruder head; s3: and extruding the plastic in a molten state onto the oval pipe mold through the extruder head to form the fresh air pipe. The application provides a forming process of fresh air pipe can solve the problem that the inner wall is unsmooth and the windage that leads to is big, the noise is big when current fresh air conditioner fresh air pipe shaping.
Description
The present application claims priority of the chinese patent application entitled "a new wind pipe and its forming process" filed by the chinese intellectual property office of china at 11/2021 under the application number 202111333725.9, which is incorporated herein by reference in its entirety.
Technical Field
The application relates to the technical field of air conditioner pipeline manufacturing, in particular to a fresh air pipe and a forming process thereof.
Background
In recent years, with the introduction of fresh air conditioning systems, people experience and have provided higher demand to indoor air quality and installation, and in view of exempting from to punch, the oval pipe that the utilization ratio is higher can usually be chooseed for use to current fresh air conditioning's fresh air pipe.
The existing oval pipe is generally manufactured by blow molding, when the oval pipe is subjected to blow molding, an uneven inner wall of the pipeline is easily formed, so that the air resistance of the oval pipe is large, noise is easily generated, and user experience is influenced.
Disclosure of Invention
The application provides a fresh air pipe and a forming process thereof, which aim to solve the problems of large wind resistance and large noise caused by uneven inner wall when the fresh air pipe of the existing fresh air conditioner is formed.
In order to achieve the purpose, the forming process of the fresh air pipe comprises the following steps:
step 1: obtaining an elliptical tube mould with an elliptical cross section, wherein the surface of the elliptical tube mould is smooth;
and 2, step: the periphery of one end of the oval pipe mold is provided with an extruder head, the oval pipe mold is controlled to rotate and pass through the extruder head, and the extruder head extrudes plastic to the oval pipe mold to form the fresh air pipe.
Optionally, in step 2, the extruder head includes a first extruder head and a second extruder head, the first extruder head and the second extruder head are respectively disposed in the major axis direction and the minor axis direction of the oval tube mold, and the plastic extrusion speed of the first extruder head is greater than the plastic extrusion speed of the second extruder head.
Optionally, in step 2, when the elliptical tube die passes through the first extruder head and the second extruder head, the elliptical tube die is controlled to pause once every preset time.
Optionally, in the step 2, glue is applied to one end of the fresh air pipe, and the end of the fresh air pipe coated with the glue is bonded to a pipe joint.
Optionally, in step 2, a pipe joint is formed at one end of the fresh air pipe by injection molding.
Optionally, the length of the major axis of the elliptical tube mold is A, and the length of the minor axis of the elliptical tube mold is B, wherein A-B is greater than or equal to 8mm and less than or equal to 10mm.
In order to achieve the purpose, the application also provides the fresh air pipe, and the surface roughness of the inner wall of the fresh air pipe is 0.1-0.2 mm.
Optionally, the fresh air duct is formed by the forming process of the fresh air duct.
Optionally, the outer wall of the fresh air pipe is provided with rib positions arranged at intervals, the height of each rib position is H, and H is larger than or equal to B/10.
Optionally, the fresh air pipe further comprises a pipe joint, the pipe joint is provided with a buckle on the outer wall of the other end connected with the fresh air pipe, and the buckle is arranged on one end of the pipe joint and used for connecting a fresh air module of a fresh air conditioner.
Optionally, the tendon is flat.
Optionally, the height of the rib position is greater than or equal to 1.5mm and less than or equal to 2mm.
Optionally, along the length direction of the fresh air pipe, the distance between two adjacent sections of the rib positions is 8-10 mm.
Optionally, the fresh air duct further comprises a protective layer, and the protective layer is laid on the inner wall of the fresh air duct.
According to the technical scheme, an oval pipe mold with an oval cross section is obtained firstly, and an extruder head is arranged on the periphery of one end of the oval pipe mold; then controlling the elliptical tube die to rotate and pass through the extruder head; and extruding the plastic in a molten state onto the elliptical tube die through the extruder head when the elliptical tube die rotates and passes through the extruder head so as to form the fresh air duct. Because the oval pipe mold rotates, when the extruder head extrudes plastic to the oval pipe mold, a pipe wall can be formed in the peripheral direction of the oval pipe mold; and then, the elliptical tube die passes through the extruder head while rotating, so that a tube wall is formed in the length direction of the elliptical tube die, and the finished fresh air tube is formed. The surface of oval pipe mould is generally relatively more smooth, and the new trend pipe inner wall through above-mentioned extrusion molding technology shaping is smooth, and its windage is little, be difficult to produce the noise, has improved user experience.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the new air duct of the present application;
FIG. 2 is a schematic side view of the new air duct of the present application during forming;
FIG. 3 is a schematic view of a portion of the construction of the new ductwork of the present application;
FIG. 4 is a schematic view of the construction of the pipe joint of the present ductwork;
fig. 5 is a partial structural schematic diagram of the fresh air pipe of the present application.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name(s) | Reference numerals | Name(s) |
| 10 | |
13 | |
16 | |
| 11 | |
14 | |
17 | |
| 12 | |
15 | Rib groove |
The implementation, functional features and advantages of the object of the present application will be further explained with reference to the embodiments, and with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered limiting of the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
The embodiment of the application provides a forming process of a fresh air pipe, which is described in detail below.
Referring to fig. 1 and fig. 2, in the embodiment of the present application, the forming process of the fresh air duct includes the following steps:
s1: obtaining an elliptical tube mould 11 with an elliptical cross section, and arranging an extrusion machine head (not marked) on the periphery of one end of the elliptical tube mould 11;
s2: controlling the elliptical tube die 11 to rotate and pass through the extruder head;
s3: and extruding the molten plastic to the oval pipe mold 11 through the extruder head to form the fresh air pipe 10.
In the process, the oval pipe die can select dies with different sizes according to actual production requirements, and the oval pipe can have a better utilization rate compared with a round pipe under the same installation condition. Meanwhile, when the oval tube mold is manufactured, the surface of the oval tube mold is ensured to be relatively smooth; the elliptical tube mold 11 with the smooth surface can enable the fresh air duct 10 to form a smooth inner wall, so that air resistance in the duct can be effectively reduced, and air quantity is increased.
In the technical scheme provided by the application, in the forming process of the fresh air pipe 10, an oval pipe mold 11 with an oval cross section is obtained firstly, and an extruder head is arranged on the periphery of one end of the oval pipe mold 11, wherein the surface of the oval pipe mold 11 is smooth; the oval tube mold 11 with a smooth surface can enable the fresh air duct 10 to form a smooth inner wall. Then controlling the elliptical tube die 11 to rotate and pass through the extruder head; when the elliptical tube mold rotates and passes through the extruder head, the extruder head extrudes molten plastic to the elliptical tube mold 11 to form the fresh air duct 10. Because the oval pipe mold 11 rotates, when the extruder head extrudes plastic to the oval pipe mold 11, a pipe wall can be formed in the peripheral direction of the oval pipe mold 11; and then passes through the extruder head while the oval tube mold 11 is rotated, so that a tube wall is formed in the length direction of the oval tube mold 11, thereby forming the completed fresh air duct 10. Compared with the existing blow molding process, when the oval pipe is subjected to blow molding, the inner wall of the pipeline is uneven due to uneven gas flow; and in this application because oval pipe mold 11's surface is general relatively more smooth, its inner wall after the neotron 10 drawing of patterns through the shaping of above-mentioned extrusion molding process with oval pipe mold is the same smooth, and fashioned neotron windage is little like this, be difficult to produce the noise, has improved user experience.
Specifically, since the major axis and the minor axis of the elliptical tube mold 11 are different, in order to ensure that a complete elliptical tube with a uniform wall thickness can be formed, in the step S1, the extruder head includes a first extruder head 12 and a second extruder head 13, and the first extruder head 12 and the second extruder head 13 are respectively disposed in the major axis direction and the minor axis direction of the elliptical tube mold 11. When the elliptical tube die 11 rotates, the speeds of the surfaces passing through the first extruder head 12 and the second extruder head 13 are different, and the speeds of the first extruder head 12 and the second extruder head 13 extruding plastics can be controlled by a controller according to preset parameters. In this embodiment, the elliptical tube mold 11 rotates at a constant speed, because an ellipse has a major axis and a minor axis, when the elliptical tube mold 11 rotates at a constant speed, the speed at which two ends of the major axis pass through the first extrusion head 12 is greater than the speed at which two ends of the minor axis pass through the second extrusion head 13, and in order to ensure that an elliptical tube is formed completely and the uniformity of the wall thickness is formed, the speed at which the first extrusion head 12 extrudes plastic is greater than the speed at which the second extrusion head 13 extrudes plastic. In other embodiments, the speed of the first extruder head 12 and the second extruder head 13 extruding plastics can be kept the same to change the rotation speed of the elliptical tube mold 11 at different stages.
Further, referring to FIG. 2, as a preferred embodiment, the length of the major axis of the oval tube mold 11 is A, and the length of the minor axis of the oval tube mold 11 is B, wherein A-B is less than or equal to 8mm and less than or equal to 10mm. When the length relationship between the long axis and the short axis of the oval tube mold 11 meets the above conditions, the material breaking condition is not easy to occur in the pipeline molding process, and the molded pipeline has higher strength.
Specifically, referring to fig. 3, in the step S2, when the elliptical tube mold 11 passes through the first extruder head 12 and the second extruder head 13, the elliptical tube mold 11 is controlled to pause once every preset time, so that rib positions 14 arranged at intervals are formed on the outer wall of the fresh air duct 10. The preset time for the oval tube mold 11 to stop determines the height of the rib position, and as a preferred embodiment, the height of the rib position 14 is H, wherein H is more than or equal to B/10. When the height of the rib position 14 meets the above conditions, the rib position 14 can ensure the use strength of the fresh air pipe 10, and the fresh air pipe is not easy to collapse.
Further, referring to fig. 4, the step S3 further includes: after the new air pipe is formed, glue solution is smeared at one end of the new air pipe 10, and the end, coated with the glue solution, of the new air pipe 10 is bonded with the pipeline joint 16. In the embodiment of the present application, rib positions 14 are arranged at intervals to form rib position grooves 15, glue solution is filled in the rib position grooves 15 at one end of the fresh air pipe 10, and one end of the fresh air pipe 10 is connected to the pipe joint 16. Glue solution is filled in the rib position groove 15 at one end of the fresh air pipe 10, so that one end of the fresh air pipe 10 is connected with the pipeline joint 16 more firmly. The glue solution is slow dry glue, one end of the pipeline joint 16 is integrated with the elliptical tube in a gluing mode, and the other end of the pipeline joint 16 is buckled and matched with a fresh air module of a fresh air conditioner, so that the installation process is convenient to realize, and the installation efficiency is improved.
Referring to fig. 4, in another embodiment, the step S3 further includes: and after the fresh air pipe is formed, a pipeline joint is formed at one end of the fresh air pipe through injection molding. Firstly, filling an injection mold in the rib position groove 15 at one end of the fresh air pipe 10, and then performing injection molding to form the pipeline joint 16. Will through the mode of moulding plastics 16 one end of pipe joint and elliptical pipe are made integratively, the other end of pipe joint 16 is detained and is matchd with fresh air conditioner's new trend module, and the installation procedure's of being convenient for realization improves the installation effectiveness.
Furthermore, a buckle 17 is arranged on the outer wall of the other end of the pipeline joint 16 connected with the fresh air pipe 10, and one end of the pipeline joint 16 with the buckle 17 is used for connecting a fresh air module of a fresh air conditioner. Pipe joint 16 can realize fresh air pipe 10 and fresh air conditioner's new trend module is installed fast, simultaneously pipe joint 16 buckle 17 can prevent fresh air pipe 10 drops.
Further, the pipe joint 16 has the same size as the inner wall of the oval pipe section of the fresh air pipe 10, and the inner wall is smooth. The pipeline joint 16 and the oval pipe section of the fresh air pipe 10 are integrally connected, the inner wall of the oval pipe section is smooth, so that the wind resistance is smaller when fresh air passes through the pipeline joint 16 to the oval pipe section or fresh air passes through the oval pipe section to the pipeline joint 16, the air quantity can be effectively increased, and the noise can be reduced.
In some embodiments of the present application, when a fluid flows through a fresh air pipe 10 with a certain pipe diameter, the resistance generated by the internal friction of the fluid is the on-way resistance, and the formula of the corresponding on-way resistance is:
wherein h is f In order to provide on-way resistance, λ is a friction coefficient, l is the length of the fresh air duct 10, d is the inner diameter of the fresh air duct 10, and u is the flow velocity of the fluid in the fresh air duct 10. Under the condition that the length of the fresh air pipe 10 and the flow velocity in the fresh air pipe are not changed, the on-way resistance h is reduced f To increase the fresh air volume, the friction coefficient of the fresh air duct 10 and the inner diameter of the air duct can be optimized.
The application also provides a fresh air pipe 10, and the surface roughness of the inner wall of the fresh air pipe 10 is 0.1-0.2 mm. Specifically, the surface roughness of the inner wall of the fresh air duct 10 is controlled to be 0.1-0.2mm (for example, the fresh air duct manufactured by the molding method), so that the friction coefficient lambda can be effectively reduced, the on-way resistance is reduced, and the indoor fresh air volume is increased.
Optionally, the fresh air duct 10 is formed by the forming process of the fresh air duct 10 according to any of the embodiments, and the specific method for forming the fresh air duct 10 by the forming process refers to the embodiments described above, and since the fresh air duct 10 adopts all the technical solutions of all the embodiments described above, at least all the beneficial effects brought by the technical solutions of the embodiments described above are achieved, and are not described in detail herein.
Optionally, in an embodiment, referring to fig. 5, the rib portions 14 are flat. Specifically, because of exempting from the consideration of drilling the wall hole, because the diameter in wall hole is certain, this application has reduced the height of muscle position 14 through making circular muscle position 14 the platykurtic to increase fresh air pipe 10's major axis and minor axis length on original basis, and then promote the fresh air volume. The width of the rib position 14 can be increased on the basis of reducing the height of the rib position 14 so as to ensure that the fresh air duct 10 has the same strength.
Furthermore, the height of the rib position 14 is more than or equal to 1.5mm and less than or equal to 2mm. The diameter of the original ribs is reduced from 3mm to 1.5-2mm, so that the major axis and the minor axis of the fresh air duct 10 are respectively increased by 2-3mm, and the flow area of the fresh air duct 10 is maximized. The rib positions 14 may be oval, for example, the major axis of the rib positions 14 is 3mm and the minor axis is 1.5-2mm. By reducing the height of the rib position 14, the fresh air volume can be increased by 2m per hour 3 And the indoor air quality is further improved.
Optionally, in an embodiment, referring to fig. 5, along the length direction of the fresh air duct 10, the distance between two adjacent rib positions 14 is between 8mm and 10mm. Specifically, the distance between two adjacent rib positions 14 is set to be 8-10mm, so that the fresh air pipe 10 is matched with the pipeline joint 16, the strength of the fresh air pipe 10 is effectively guaranteed, and the fresh air pipe 10 is prevented from being broken due to stress concentration.
Optionally, in an embodiment, the fresh air duct 10 further comprises a protective layer, and the protective layer is laid on the inner wall of the fresh air duct 10. Specifically, the protective layer has smooth appearance, can be used for hydrophobic, sparse protective layer, and the protective layer can be fixed at the inner wall of fresh air pipe 10 through pasting the mode, through setting up the protective layer, can make fresh air pipe 10 use the inner wall still to keep better smoothness after the long time. For example, the protective layer can be a PVC film, and the PVC material has the characteristics of smooth surface, no water absorption and the like.
The above detailed description is made on the fresh air duct and the forming process thereof provided by the embodiments of the present application, and the principle and the implementation manner of the present application are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (15)
1. The forming process of the fresh air pipe is characterized by comprising the following steps of:
s1: obtaining an elliptical tube mould with an elliptical cross section, and arranging an extrusion machine head on the periphery of one end of the elliptical tube mould;
s2: controlling the elliptical tube die to rotate and pass through the extruder head;
s3: and extruding the plastic in a molten state onto the oval pipe mold through the extruder head to form the fresh air pipe.
2. The process for forming a fresh air duct according to claim 1, wherein in step S1, the extruder head includes a first extruder head and a second extruder head, and the first extruder head and the second extruder head are respectively disposed in a major axis direction and a minor axis direction of the oval duct mold.
3. The process for forming a fresh air duct according to claim 2, wherein the plastic extrusion speed of the first extruder head is greater than the plastic extrusion speed of the second extruder head.
4. The process for forming a fresh air duct according to claim 2, wherein in the step S2, the elliptical duct mold is controlled to stop once every preset time while passing through the first extruder head and the second extruder head.
5. The process for forming a fresh air duct according to claim 1, wherein the step S3 further comprises: after the new air pipe is formed, glue solution is smeared at one end of the new air pipe, and the end, coated with the glue solution, of the new air pipe is bonded with a pipeline joint.
6. The process for forming a fresh air duct according to claim 1, wherein the step S3 further comprises: and after the fresh air pipe is formed, a pipeline joint is formed at one end of the fresh air pipe through injection molding.
7. The process for forming a fresh air duct according to claim 1, wherein the length of the major axis of the oval tube mold is a and the length of the minor axis of the oval tube mold is B, wherein a-B is 8mm or more and 10mm or less.
8. The fresh air pipe is characterized in that the surface roughness of the inner wall of the fresh air pipe is 0.1-0.2 mm.
9. The fresh air duct according to claim 8, characterized in that it is formed by a process of forming a fresh air duct according to any of claims 1-6.
10. The fresh air duct according to claim 8, wherein the outer wall of the fresh air duct is provided with ribs arranged at intervals, the height of the ribs is H, wherein H is more than or equal to B/10.
11. The fresh air duct according to claim 8, wherein the fresh air duct further comprises a duct joint, a buckle is arranged on the outer wall of the other end of the duct joint connected with the fresh air duct, and one end of the duct joint with the buckle is used for connecting a fresh air module of a fresh air conditioner.
12. The fresh air duct of claim 10, wherein said ribs are flat.
13. The fresh air duct of claim 12, wherein the rib locations have a height of 1.5mm or greater and 2mm or less.
14. The fresh air duct according to claim 10, wherein the distance between two adjacent rib positions along the length direction of the fresh air duct is 8-10 mm.
15. The fresh air duct of claim 8, further comprising a protective layer disposed on an inner wall of the fresh air duct.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2021113337259 | 2021-11-11 | ||
| CN202111333725.9A CN114111006A (en) | 2021-11-11 | 2021-11-11 | Fresh air pipe and forming process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115751679A true CN115751679A (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111333725.9A Pending CN114111006A (en) | 2021-11-11 | 2021-11-11 | Fresh air pipe and forming process thereof |
| CN202211393564.7A Pending CN115751679A (en) | 2021-11-11 | 2022-11-08 | Fresh air pipe and forming process thereof |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111333725.9A Pending CN114111006A (en) | 2021-11-11 | 2021-11-11 | Fresh air pipe and forming process thereof |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH081745A (en) * | 1994-06-15 | 1996-01-09 | Sumitomo Metal Ind Ltd | Manufacture of covered tube |
| CN103660305B (en) * | 2013-12-12 | 2015-09-02 | 北京化工大学 | A kind of heavy caliber PVC dynamic molding method and device |
| CN104722592B (en) * | 2013-12-19 | 2017-04-12 | 合肥神马科技集团有限公司 | Extrusion die for metal tube |
| CN105673960A (en) * | 2016-04-18 | 2016-06-15 | 河北奥特莱防水材料有限公司 | Plastic pipe |
| JP2019051652A (en) * | 2017-09-15 | 2019-04-04 | ダイキン工業株式会社 | Method for manufacturing electric wire |
| CN213082279U (en) * | 2020-07-28 | 2021-04-30 | 大连联合高分子材料有限公司 | Heat-shrinkable tube with oval cross section formed by extrusion and extrusion machine head die thereof |
| CN112355079A (en) * | 2020-10-19 | 2021-02-12 | 盐城仕博机械制造有限公司 | Oval tuber pipe machine |
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- 2021-11-11 CN CN202111333725.9A patent/CN114111006A/en active Pending
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- 2022-11-08 CN CN202211393564.7A patent/CN115751679A/en active Pending
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| CN114111006A (en) | 2022-03-01 |
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