CN108454076B - Production mold and production method of polytetrafluoroethylene intermittent corrugated pipe - Google Patents
Production mold and production method of polytetrafluoroethylene intermittent corrugated pipe Download PDFInfo
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- CN108454076B CN108454076B CN201810076149.6A CN201810076149A CN108454076B CN 108454076 B CN108454076 B CN 108454076B CN 201810076149 A CN201810076149 A CN 201810076149A CN 108454076 B CN108454076 B CN 108454076B
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- mold
- die
- corrugated pipe
- polytetrafluoroethylene
- core rod
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 22
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 22
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 230000000712 assembly Effects 0.000 claims abstract description 4
- 238000000429 assembly Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 238000000465 moulding Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/22—Corrugating
- B29C53/30—Corrugating of tubes
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
-
- 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
- B29L2023/18—Pleated or corrugated hoses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention provides a production die and a production method of polytetrafluoroethylene intermittent bellows, and the production die comprises a mouth die, a core die and a workbench, wherein the mouth die comprises a square support, a lower die is fixedly arranged at the bottom of the support, an upper die connected to the top of the square support through a screw rod is arranged at the upper part of the lower die, a rotating wheel is fixedly arranged at the top of the screw rod, a lower arc-shaped forming end is arranged in the middle of the upper end surface of the lower die, an upper arc-shaped forming end is arranged in the middle of the lower end surface of the upper die, heating assemblies are arranged at the upper arc-shaped forming end and the lower arc-shaped forming end, and upper threads and lower threads are respectively arranged on inner arc surfaces of the upper arc-shaped forming end and the lower arc-shaped forming end; the core mould comprises a core rod which is connected with a motor, and rolling wheels are arranged at the bottoms of two side surfaces of the square support. Divide into mould and bed die with the production mould, form the bellows and be interrupted the pipeline that exists with the straight tube, this mould can be used and be interrupted the production of bellows, also can use in the production process of whole section bellows, has increased the practicality of mould, has reduced manufacturing cost.
Description
Technical Field
The invention relates to the technical field of corrugated pipe production, in particular to a production mold and a production method of a polytetrafluoroethylene intermittent corrugated pipe.
Background
At present, the drainage of domestic helicopter main pulp and equipment platform adopts metal aluminum or alloy pipe, these materials can be corroded or aged easily under the action of natural environment, oil and water drained in the aircraft service environment, the performance of the drain pipe can be attenuated and changed, and the phenomena of damage, aging and leakage are caused, thereby affecting the normal use and service life of the aircraft body, components, airborne equipment and the whole aircraft, the common straight pipe is not beneficial to the bending and the penetration of angles in the aircraft body, in order to avoid the over-fast corrosion and aging of the metal drain pipe, the damage and the leakage of the drain pipe are prevented, simultaneously, the self weight of the aircraft is lightened, and the polytetrafluoroethylene bendable pipe is used for replacing the metal pipe to become a necessary choice.
In the prior art, corrugated pipes are all full-section corrugated pipes, the full-section corrugated pipes can be suitable for various environments, but the full-section corrugated pipes require more raw materials, if bending is performed only at partial positions, the waste is great, only production molds and production methods for the full-section corrugated pipes exist in the existing molds, and molds and production methods for producing the corrugated pipes and straight pipes at intervals do not exist, so that molds and production methods for producing the products are needed.
Disclosure of Invention
The invention aims to solve the problems of more materials needed by the whole section of corrugated pipe and waste in the prior art, and provides a production mold and a production method of a polytetrafluoroethylene intermittent corrugated pipe.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a production die of a polytetrafluoroethylene interrupted corrugated pipe, which comprises a mouth die, a core die and a workbench,
the mouth mold comprises a square support, a lower mold is fixedly arranged at the bottom of the support, an upper mold connected to the top of the square support through a screw rod is arranged at the upper part of the lower mold, a rotating wheel is fixedly arranged at the top of the screw rod, a lower arc-shaped forming end is arranged in the middle of the upper end face of the lower mold, an upper arc-shaped forming end is arranged in the middle of the lower end face of the upper mold, heating assemblies are arranged at the upper arc-shaped forming end and the lower arc-shaped forming end, and upper threads and lower threads are respectively arranged on inner arc faces of the upper arc-shaped forming end and the lower arc-shaped forming end;
the mandrel comprises a mandrel, the surface of the mandrel is of a threaded structure, one end of the mandrel is connected with a motor, the bottom of the mandrel is discontinuously provided with a detachable supporting part, the supporting part is detachably connected with the workbench, and the motor is fixed on the workbench;
the clearance between the integral thread formed by the upper thread and the lower thread and the thread of the core rod is 2-3mm when being matched;
the bottom of each side face of the square support is provided with at least two rolling wheels respectively.
The forming die is divided into an upper die and a lower die which can be opened and closed, and the upper die and the lower die are opened and closed at required places in the using process, so that the position of a corrugated section is controlled, and a structure with a straight pipe and a corrugated pipe at intervals is formed.
Preferably, the workbench is provided with a guide rail matched with the rolling wheel. The rolling wheels are matched with the guide rails, and the die can move along the direction of the guide rails under the action of the rolling wheels and the guide rails.
Preferably, the motor is a stepping motor. The stepping motor can control the rotation angle of the core rod, further control the moving distance of the neck mold on the guide rail, and ensure the lengths of the corrugated pipe and the straight pipe in the production process.
Preferably, the inner walls of two sides of the square support are fixedly provided with guide pieces. The guide piece can effectively control the offset of the upper die in the up-and-down moving process, so that the upper threads and the lower threads of the upper die and the lower die cannot offset in the die closing process, and the forming quality of corrugations is guaranteed.
The production method of the polytetrafluoroethylene intermittent bellows by utilizing the production mould comprises the following steps,
s1: connecting the heating assembly with a power supply to heat the mouth mold;
s2: sleeving a straight pipe on the core rod:
s3: inserting the core rod into the mouth mold, rotating the core rod clockwise, closing the mouth mold, and rotating and molding along with the core mold;
s4: after the part is molded, opening the mouth mold, pushing the straight pipe section with the required size, closing the mouth mold, and repeating the step S3;
s5: after the repetition is completed, when the straight pipe reaches the core mold 4/5, the rotation is stopped, the mouth mold is opened, the core rod is rotated in the reverse direction, and the formed corrugated pipe is withdrawn.
Preferably, the heating temperature of the die is 220-280 ℃.
Preferably, the rotation speed of the mandrel is 50-100 revolutions per minute.
Preferably, the straight pipe length is greater than 10% -20% of the required corrugated pipe length.
Preferably, the mandrel length is greater than 20% to 30% of the desired bellows length.
Preferably, the straight pipe is a polytetrafluoroethylene straight pipe.
The invention has the beneficial effects that: the production mold is divided into the upper mold and the lower mold, the position of the corrugated pipe can be adjusted purposefully through opening and closing of the mold at different positions, the corrugated pipe and the straight pipe are formed to be interrupted, the mold can be applied to production of the corrugated pipe and can be used in the production process of the whole section of corrugated pipe, the practicability of the mold is improved, and the production cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic front view of the die of the present invention;
FIG. 2 is a schematic left side view illustration of the die of the present invention;
FIG. 3 is a schematic view of the construction of the die and core of the present invention;
in the figure: 1. rolling wheel, 2, lower die, 3, upper die, 4, guide piece, 5, lead screw, 6, rotating wheel, 7, square support, 8, upper arc forming end, 9, lower arc forming end, 10, heating assembly, 11, core rod, 12, motor, 13, workbench, 14 and guide rail.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings.
As shown in fig. 1 to 3, a mold for producing a polytetrafluoroethylene interrupted corrugated pipe comprises a die, a core mold and a table 13,
the mouth mold comprises a square support 7, a lower mold 2 is fixedly arranged at the bottom of the support, an upper mold 3 connected to the top of the square support 7 through a screw rod 5 is arranged at the upper part of the lower mold 2, a rotating wheel 6 is fixedly arranged at the top of the screw rod 5, a lower arc-shaped forming end 9 is arranged in the middle of the upper end face of the lower mold 2, an upper arc-shaped forming end 8 is arranged in the middle of the lower end face of the upper mold 3, heating assemblies 10 are arranged at the upper arc-shaped forming end 8 and the lower arc-shaped forming end 9, and upper threads and lower threads are respectively arranged on inner arc surfaces of the upper arc-shaped forming end 8 and the lower arc-shaped forming end 9; the upper die 3 and the lower die 2 are arranged into an opening and closing structure, so that the dies can be opened and closed at any required position, and the position and the length of the corrugated pipe can be controlled.
The core mold comprises a core rod 11, the surface of the core rod 11 is in a threaded structure, one end of the core rod 11 is connected with a motor 12, the bottom of the core rod 11 is discontinuously provided with a detachable supporting part, the supporting part is detachably connected with a workbench 13, and the motor 12 is fixed on the workbench 13; the detachable supporting part includes and the arc surface with 11 adaptations of plug, and the arc surface lower extreme passes through supporting seat fixed connection, and the supporting seat can be dismantled with the workstation and be connected, and when the plug is longer, can prevent the plug overlength and the vibration in the motion process that leads to through being equipped with detachable supporting part, influence the axiality of plug and bush.
The clearance between the integral threads formed by the upper threads and the lower threads and the threads of the core rod 11 is 2-3mm when the integral threads are matched with the threads; the thread of the core rod 11 is matched with the upper thread and the lower thread, the rotating angle of the core rod 11 is controlled by the motor 12, the moving position of the neck ring die can be controlled, the clearance between the thread of the core rod 11 and the integral threads formed by the upper thread and the lower thread is 2-3mm, in the embodiment, the clearance is 2.6mm, and at the moment, the clearance between the thread crest diameter of the core rod 11 and the inner diameter of the straight pipe is 0.4 mm.
The bottom of each side face of the square support 7 is respectively provided with at least two rolling wheels 1. The rolling wheels can make the die move on the guide rail.
Wherein, the worktable 13 is provided with a guide rail 14 matched with the rolling wheel 1. The rolling wheel 1 is arranged on the guide rail 14 and moves along the guide rail 14, the mouth mold which is rotationally connected with the rolling wheel 1 can move along the direction of the guide rail 14, and the mouth mold cannot deviate in the moving process through the matching of the rolling wheel 1 and the guide rail 14, so that the matching coaxiality of the mouth mold and the core mold is increased.
Wherein the motor 12 is a stepper motor 12. The stepping motor 12 can accurately control the rotation angle of the core rod 11, and further control the moving position of the die.
Wherein, the inner walls of two sides of the square bracket 7 are fixedly provided with a guide piece 4. In the up-and-down moving process of the upper die 3 of the die, the deviation of the upper die 3 in the moving process can be eliminated through the guide piece 4, the upper thread and the lower thread can be completely aligned in the die assembling process, and the deviation cannot occur.
The production method of the polytetrafluoroethylene intermittent bellows by utilizing the production mould comprises the following steps,
s1: connecting the heating assembly 10 with a power supply to heat the mouth mold;
s2: sleeving a straight pipe on the core rod 11:
s3: inserting the core rod 11 into the mouth mold, rotating the core rod 11 clockwise, closing the mouth mold, and forming along with the rotation of the core mold;
s4: after the part is molded, opening the mouth mold, pushing the straight pipe section with the required size, closing the mouth mold, and repeating the step S3;
s5: after the repetition, when the straight pipe reaches the core mold 4/5, the rotation is stopped, the die is opened, the core rod 11 is rotated in the reverse direction, and the formed corrugated pipe is ejected.
Wherein the heating temperature of the neck ring die is 220-280 ℃. In the embodiment, the heating temperature of the neck ring mold is 250 ℃, the corrugated appearance of the corrugated pipe can be stably formed under the temperature condition, and the phenomena of unobvious corrugation and damage of the corrugated pipe caused by over-low temperature can be avoided.
Wherein the rotating speed of the core rod 11 is 50-100 revolutions per minute. The core rod 11 may cause the core rod 11 to shake when the rotation speed is too high, and the cooperation between the core rod 11 and the upper thread and the lower thread is affected, so as to affect the forming quality of the corrugated pipe.
Wherein the length of the straight pipe is 15-20% of the length of the required corrugated pipe. Since the machining of the straight pipe into the corrugated pipe leads to a reduction in length, the length of the straight pipe needs to be increased appropriately during the machining. In this embodiment, the straight tube length is greater than 18% of the desired bellows length.
Wherein the length of the core rod 11 is more than 20-30% of the length of the required corrugated pipe. When the straight pipe is completely sleeved on the core rod 11, the straight pipe can be completely sleeved on the core rod 11.
Wherein the straight pipe is a polytetrafluoroethylene straight pipe.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (8)
1. A production die of a polytetrafluoroethylene interrupted corrugated pipe is characterized by comprising a mouth die, a core die and a workbench,
the mouth mold comprises a square support, a lower mold is fixedly arranged at the bottom of the support, an upper mold connected to the top of the square support through a screw rod is arranged at the upper part of the lower mold, a rotating wheel is fixedly arranged at the top of the screw rod, a lower arc-shaped forming end is arranged in the middle of the upper end face of the lower mold, an upper arc-shaped forming end is arranged in the middle of the lower end face of the upper mold, heating assemblies are arranged at the upper arc-shaped forming end and the lower arc-shaped forming end, and upper threads and lower threads are respectively arranged on inner arc faces of the upper arc-shaped forming end and the lower arc-shaped forming end;
the mandrel comprises a mandrel, the surface of the mandrel is of a threaded structure, one end of the mandrel is connected with a motor, the bottom of the mandrel is discontinuously provided with a detachable supporting part, the supporting part is detachably connected with the workbench, and the motor is fixed on the workbench;
the clearance between the integral thread formed by the upper thread and the lower thread and the thread of the core rod is 2-3mm when being matched;
the bottoms of the two side surfaces of the square support are respectively provided with at least two rolling wheels;
the workbench is provided with a guide rail matched with the rolling wheel;
the inner walls of two sides of the square bracket are fixedly provided with a guide piece;
the production method for producing the polytetrafluoroethylene intermittent corrugated pipe by using the production mold comprises the following steps:
s1: connecting the heating assembly with a power supply to heat the mouth mold;
s2: sleeving a straight pipe on the core rod:
s3: inserting the core rod into the mouth mold, rotating the core rod clockwise, closing the mouth mold, and rotating and molding along with the core mold;
s4: after the part is molded, opening the mouth mold, pushing the straight pipe section with the required size, closing the mouth mold, and repeating the step S3;
s5: after the repetition is completed, when the straight pipe reaches the core mold 4/5, the rotation is stopped, the mouth mold is opened, the core rod is rotated in the reverse direction, and the formed corrugated pipe is withdrawn.
2. The mold for producing polytetrafluoroethylene interrupted corrugated pipe according to claim 1, wherein: the motor is a stepping motor.
3. A method for producing a polytetrafluoroethylene interrupted corrugated pipe by using the production mold according to any one of claims 1 to 2, characterized in that: comprises the following steps of (a) carrying out,
s1: connecting the heating assembly with a power supply to heat the mouth mold;
s2: sleeving a straight pipe on the core rod:
s3: inserting the core rod into the mouth mold, rotating the core rod clockwise, closing the mouth mold, and rotating and molding along with the core mold;
s4: after the part is molded, opening the mouth mold, pushing the straight pipe section with the required size, closing the mouth mold, and repeating the step S3;
s5: after the repetition is completed, when the straight pipe reaches the core mold 4/5, the rotation is stopped, the mouth mold is opened, the core rod is rotated in the reverse direction, and the formed corrugated pipe is withdrawn.
4. A method of producing a polytetrafluoroethylene interrupted corrugated pipe according to claim 3, wherein: the heating temperature of the neck ring mold is 220-280 ℃.
5. A method of producing a polytetrafluoroethylene interrupted corrugated pipe according to claim 3, wherein: the rotating speed of the core rod is 50-100 r/min.
6. A method of producing a polytetrafluoroethylene interrupted corrugated pipe according to claim 3, wherein: the length of the straight pipe is 10% -20% of the length of the required corrugated pipe.
7. A method of producing a polytetrafluoroethylene interrupted corrugated pipe according to claim 3, wherein: the length of the core rod is more than 20-30% of the length of the required corrugated pipe.
8. A method of producing a polytetrafluoroethylene interrupted corrugated pipe according to claim 3, wherein: the straight pipe is a polytetrafluoroethylene straight pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076149.6A CN108454076B (en) | 2018-01-26 | 2018-01-26 | Production mold and production method of polytetrafluoroethylene intermittent corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076149.6A CN108454076B (en) | 2018-01-26 | 2018-01-26 | Production mold and production method of polytetrafluoroethylene intermittent corrugated pipe |
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| Publication Number | Publication Date |
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| CN108454076A CN108454076A (en) | 2018-08-28 |
| CN108454076B true CN108454076B (en) | 2021-09-10 |
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| CN201810076149.6A Active CN108454076B (en) | 2018-01-26 | 2018-01-26 | Production mold and production method of polytetrafluoroethylene intermittent corrugated pipe |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110667092B (en) * | 2019-09-22 | 2020-12-08 | 安徽超星新材料科技有限公司 | Double-wall corrugated pipe production equipment and production method of double-wall corrugated pipe |
| CN112223726B (en) * | 2020-09-29 | 2022-04-29 | 温州市氟塑设备制造厂 | Corrugated pipe machining equipment and using method |
| CN113399492A (en) * | 2021-05-11 | 2021-09-17 | 真兰管业科技有限公司 | Production process of sizing pipe for reducing welding seams |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162977A (en) * | 2013-05-16 | 2014-11-26 | 泰州华腾管道设备有限公司 | Spiral polytetrafluoroethylene bellows forming machine |
| CN107471618A (en) * | 2016-12-21 | 2017-12-15 | 温州风神硅胶制品有限公司 | A kind of corrugated pipe forming machine |
-
2018
- 2018-01-26 CN CN201810076149.6A patent/CN108454076B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162977A (en) * | 2013-05-16 | 2014-11-26 | 泰州华腾管道设备有限公司 | Spiral polytetrafluoroethylene bellows forming machine |
| CN107471618A (en) * | 2016-12-21 | 2017-12-15 | 温州风神硅胶制品有限公司 | A kind of corrugated pipe forming machine |
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| CN108454076A (en) | 2018-08-28 |
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Denomination of invention: A Production Mold and Method for PTFE Intermittent Bellows Granted publication date: 20210910 Pledgee: Zhejiang Hangzhou Yuhang Rural Commercial Bank Co.,Ltd. Yuhang Branch Pledgor: HANGZHOU RIYAO TECHNOLOGY Co.,Ltd. Registration number: Y2024980013839 |