CN220464513U - Production device of high-precision polytetrafluoroethylene stirring rod - Google Patents
Production device of high-precision polytetrafluoroethylene stirring rod Download PDFInfo
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- CN220464513U CN220464513U CN202321850787.1U CN202321850787U CN220464513U CN 220464513 U CN220464513 U CN 220464513U CN 202321850787 U CN202321850787 U CN 202321850787U CN 220464513 U CN220464513 U CN 220464513U
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- wall
- ptfe
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 68
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 68
- 238000003756 stirring Methods 0.000 title claims abstract description 61
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 24
- 239000010935 stainless steel Substances 0.000 abstract description 24
- 238000005245 sintering Methods 0.000 abstract description 9
- 238000005336 cracking Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000009757 thermoplastic moulding Methods 0.000 description 1
Abstract
The utility model discloses a production device of a high-precision polytetrafluoroethylene stirring rod, which belongs to the technical field of PTFE stirring rods, and aims at solving the problems that the PTFE stirring rod is complex to manufacture, the coaxiality of finished products is low, the packing firmness of PTFE is poor and the strength is low; according to the utility model, the stainless steel mandrel is positioned, the outer side of the stainless steel mandrel is subjected to feeding pressing and the upper end of the stainless steel mandrel is subjected to feeding pressing treatment by utilizing the forming die sleeve, the lower die, the upper pressing sleeve and the upper die, so that the PTFE stirring rod is coaxial and smooth in surface during forming treatment, and the initially formed PTFE stirring rod is subjected to pressing sintering treatment after being formed under the actions of the pressing die sleeve, the positioning supporting sleeve, the pressing sliding block and the pressing mechanism, so that PTFE wrapping is firm and has no cracking, the coaxiality is high, the surface is smooth and the wrapping thickness is uniform in the manufacturing process of the PTFE stirring rod.
Description
Technical Field
The utility model belongs to the technical field of PTFE stirring rods, and particularly relates to a production device of a high-precision polytetrafluoroethylene stirring rod.
Background
Polytetrafluoroethylene (PTFE) resin has excellent performances of high and low temperature resistance, corrosion resistance, weather resistance, high lubrication, no toxicity, electrical insulation, non-adhesion and the like, so that the Polytetrafluoroethylene (PTFE) resin plays an important role in the fields of petrochemical industry, machinery, electronic and electric, light industry daily necessities, prevention and control, construction, biomedical treatment, aerospace and the like; PTFE is a thermoplastic material, and has extremely high melt viscosity (melt viscosity at 380 ℃ C. Is 1X 10) due to its special molecular structure 10 Pa·s), shear sensitivity (which is prone to melt fracture), large shrinkage creep, low friction factor, and the like, and is difficult to process by conventional melt extrusion, injection molding, and the like, and conventional thermoplastic molding methods.
At present, special molding processability based on PTFE mainly comprises sintering molding, pushing molding, compression molding, calendaring molding, hydraulic molding, plunger extrusion molding, injection molding and the like, for special application occasions, such as the existing stirring and mixing of strong acid and alkali solution in a laboratory, a general stirring paddle is a stainless steel stirring paddle and is not resistant to strong acid and alkali corrosion, in view of the existing PTFE stirring rod, most of the PTFE stirring rod is sleeved on a stainless steel bar with corresponding size by using PFA pipe materials, the PTFE stirring rod is used as a polytetrafluoroethylene stirring rod, and the polytetrafluoroethylene stirring rod is obtained by winding polytetrafluoroethylene raw material strips on the stainless steel bar and sintering at high temperature after multilayer winding.
According to the stirring rod processed by the two schemes, the stainless steel rod is sleeved with the PFA pipe, so that the adhesion between the PFA pipe and the stainless steel rod is not tight, and in the experimental process, corrosive solution permeates into a gap between the stainless steel rod and the PFA pipe, so that the stainless steel rod is corroded, the service life of the stirring rod is shortened, and the experimental influence is reduced; the polytetrafluoroethylene stirring rod manufactured by the winding method has the main defects of low coaxiality and uneven PTFE thickness wrapped on the surface, so that the precision of the stirring rod is affected, the stirrer can be affected to vibrate severely when stirring a solution, and unnecessary loss is caused.
In view of the above, it is therefore necessary to provide a production apparatus for a PTFE stirring rod which is easy to manufacture, has high coaxiality, is firmly wrapped with PTFE, and has higher strength.
Disclosure of Invention
The utility model aims to provide a production device of a high-precision polytetrafluoroethylene stirring rod, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a production device of high accuracy polytetrafluoroethylene puddler, includes shaping die sleeve and pressurization die sleeve, still includes:
the lower die is embedded and arranged on the inner wall of the bottom of the forming die sleeve, a through groove matched with the stirring rod mandrel is formed in the inner wall of the lower die, and an upper pressing sleeve and an upper die which are respectively connected with the inner wall of the forming die sleeve in a sliding manner are arranged above the stirring rod mandrel;
the positioning support sleeve is arranged on the inner wall of the pressurizing die sleeve in a sliding mode, a pressurizing sliding block which is connected with the inner wall of the pressurizing die sleeve in a sliding mode is arranged above the positioning support sleeve, and a pressurizing mechanism is arranged on the outer side of the positioning support sleeve and the outer side of the pressurizing sliding block together.
In one aspect, the pressurizing mechanism includes:
the two adjusting blocks are respectively in threaded connection with the top inner wall and the bottom inner wall of the pressurizing die sleeve;
the two high-temperature-resistant compression springs are respectively arranged at the top of the pressurizing sliding block and the bottom of the positioning supporting sleeve, and the other ends of the two high-temperature-resistant compression springs are respectively contacted with the opposite surfaces of the two regulating blocks.
It is further worth to say that the diameter of the inner wall of the positioning support sleeve and the diameter of the placing through groove are equal to the diameter of the outer surface of the stirring rod mandrel.
It should be further noted that the diameter of the outer surface of the positioning support sleeve and the diameter of the outer surface of the pressing slide block are equal to the diameter of the inner wall of the pressing sleeve.
As a preferable implementation mode, the diameter of the outer surface of the upper pressing sleeve and the diameter of the outer surface of the upper die are equal to the diameter of the inner wall of the forming die sleeve, which is positioned above the lower die, and the diameter of the inner surface of the upper pressing sleeve is equal to the diameter of the outer surface of the stirring rod mandrel.
As a preferred embodiment, the vertical section of the lower die is arranged in an inverted convex shape, and an arc chamfer is arranged at the convex shape of the lower die.
Compared with the prior art, the production device of the high-precision polytetrafluoroethylene stirring rod provided by the utility model at least comprises the following beneficial effects:
(1) Through utilizing shaping die sleeve, lower mould, go up the mould, go up pressure sleeve and go up the mould to realize to stainless steel mandrel location, stainless steel mandrel outside reinforced pressing and stainless steel mandrel upper end reinforced pressing treatment, thereby make the axiality and the surface smoothness of PTFE puddler when shaping is handled, then through the effect of pressurization die sleeve, the location support sleeve, the pressurization slider and pressurizing mechanism, make preliminary fashioned PTFE puddler carry out the pressurization sintering treatment after the shaping, thereby make the PTFE puddler firm no fracture of PTFE parcel in-process of making, the axiality is high, the surface is smooth, parcel thickness is even, thereby satisfy the demand to high axiality, high PTFE parcel fastness and use intensity when producing the preparation to the PTFE puddler.
(2) The positioning support sleeve is arranged to fit and mount the core shaft part of the PTFE stirring rod, so that stability and coaxiality of the PTFE stirring rod during pressurization adjustment are improved, the pressurization effect on the PTFE stirring rod is improved, and the subsequent use performance of the PTFE stirring rod is improved to a certain extent.
Drawings
FIG. 1 is a schematic view of a partial structure of a lower die at a placement groove;
FIG. 2 is a schematic illustration of the positioning of a stainless steel mandrel of a stirring rod according to the present utility model;
FIG. 3 is a schematic diagram of the stirring rod stainless steel core shaft outer ring charging state;
fig. 4 is a schematic diagram showing a state of the stirring rod stainless steel core shaft outer ring after charging and compression.
Fig. 5 is a schematic diagram of the stainless steel mandrel charging state of the stirring rod.
FIG. 6 is a schematic diagram showing the state of the stirring rod stainless steel mandrel end charge after compression.
Fig. 7 is a schematic view of the present utility model for placing a blank into a pressing mechanism.
In the figure: 1. forming a die sleeve; 2. pressurizing a die sleeve; 3. a lower die; 4. placing a through groove; 5. pressing the sleeve; 6. an upper die; 7. positioning a support sleeve; 8. a pressurizing slide block; 9. a pressurizing mechanism; 91. an adjusting block; 92. high temperature resistant compression spring.
Detailed Description
The utility model is further described below with reference to examples.
Referring to fig. 1-7, the utility model provides a production device of a high-precision polytetrafluoroethylene stirring rod, which comprises a molding die sleeve 1, a pressurizing die sleeve 2, a lower die 3, an upper pressing sleeve 5 and an upper die 6, wherein the lower die 3 is embedded and arranged on the inner wall of the bottom of the molding die sleeve 1, a through groove 4 matched with a stirring rod mandrel is formed in the inner wall of the lower die 3, and the upper pressing sleeve 5 and the upper die 6 which are respectively connected with the inner wall of the molding die sleeve 1 in a sliding manner are arranged above the stirring rod mandrel;
the positioning support sleeve 7, the positioning support sleeve 7 slides and sets up in the inner wall of pressurization die sleeve 2, and the top of positioning support sleeve 7 is provided with the pressurization slider 8 with pressurization die sleeve 2 inner wall sliding connection, and the outside of positioning support sleeve 7 and pressurization slider 8 is provided with pressurization mechanism 9 jointly.
As further shown in fig. 7, it is worth specifically describing that the pressurizing mechanism 9 includes two adjusting blocks 91, and the two adjusting blocks 91 are respectively in threaded connection with the top inner wall and the bottom inner wall of the pressurizing die sleeve 2;
the two high temperature resistant compression springs 92 are respectively arranged at the top of the pressurizing slide block 8 and the bottom of the positioning support sleeve 7, and the other ends of the two high temperature resistant compression springs 92 are respectively contacted with the opposite surfaces of the two adjusting blocks 91.
Further, as shown in fig. 1, 2 and 7, it is worth specifically explaining that the diameter of the inner wall of the positioning support sleeve 7 and the diameter of the placing through groove 4 are equal to the diameter of the outer surface of the stirring rod mandrel, and the positioning support sleeve 7 is arranged to fit and mount the mandrel part of the PTFE stirring rod, so that the stability and the coaxiality of the PTFE stirring rod during pressurization adjustment are improved, the pressurization effect on the PTFE stirring rod is improved, and the subsequent use performance is improved to a certain extent.
Further, as shown in fig. 7, it is worth specifically explaining that the outer surface diameter of the positioning support sleeve 7 and the outer surface diameter of the pressing slider 8 are equal to the inner wall diameter of the pressing sleeve 5.
As further shown in fig. 4, 5 and 6, it should be specifically explained that the diameter of the outer surface of the upper pressing sleeve 5 and the diameter of the outer surface of the upper die 6 are equal to the diameter of the inner wall of the forming die sleeve 1 above the lower die 3, and the diameter of the inner surface of the upper pressing sleeve 5 is equal to the diameter of the outer surface of the stirring rod mandrel.
Further, as shown in fig. 1 and fig. 2, it is worth specifically explaining that the vertical section of the lower die 3 is in an inverted convex shape, the convex shape of the lower die 3 is provided with an arc chamfer, and the lower die 3 is arranged in a shape so as to facilitate complete embedded installation with the forming die sleeve 1, thereby improving the convenience of assembling the polytetrafluoroethylene stirring rod before forming and further improving the coaxiality of the polytetrafluoroethylene stirring rod during subsequent forming.
The scheme comprises the following working processes: the method mainly comprises the following steps:
s1: stainless steel mandrel positioning: placing the lower die 3 into a through hole of the forming die sleeve 1, wherein the lower end surface of the lower die 3 is overlapped with the lower end surface of the forming die sleeve 1; after the mandrel passes through the lower die 3 and is placed in the through groove 4, the lower end face coincides with the lower end faces of the lower die 3 and the forming die sleeve 1.
S2: and (3) charging and pressing the outer side of the stainless steel mandrel: the first portion of 50 mesh PTFE powder is dried and added between the forming die sleeve 1 and the mandrel, the first added PTFE powder is pressed by the lower end face of the upper pressing sleeve 5, the pressure is 35Mpa, and the first portion of PTFE powder after pressing is kept for about 15 minutes, and the upper end face of the first portion of PTFE powder after pressing is flush with the upper end face of the mandrel.
S3: and (3) feeding and pressing the upper end of the stainless steel mandrel: taking out the upper pressing sleeve 5, adding a second part of PTFE powder into the molding die sleeve 1 and the top of the mandrel, pressing the PTFE powder added for the second time by using the lower end face of the upper die 6, keeping the pressure at 50Mpa for about 12 minutes, and obtaining a polytetrafluoroethylene stirring rod blank after compacting, wherein the upper end face of the mandrel is about 5mm away from the lower end face of the upper die 6.
S4: and (3) pressurized sintering: the blank is taken out from the molding die sleeve 1 and fixed on the pressurizing die sleeve 2, the adjusting blocks 91 positioned at the top and the bottom of the molding die sleeve 1 are rotated through threads, so that the high-temperature-resistant compression spring 92 is extruded, the positioning support sleeve 7 and the pressurizing slide block 8 are pushed to move under the elastic force of the high-temperature-resistant compression spring 92, the polytetrafluoroethylene stirring rod blank is extruded, the pressurizing die sleeve 2 and the blank are put into a sintering furnace together, the furnace door is closed, the high-temperature sintering is carried out, the temperature is raised to 350 ℃ from the room temperature in a proportion mode during sintering, then the temperature is kept for 5 hours, and finally, the polytetrafluoroethylene stirring rod part is obtained through natural cooling.
The working process can be as follows: through utilizing shaping die sleeve 1, lower mould 3, go up mould 6, go up pressure sleeve 5 and last mould 6 to realize to stainless steel mandrel location, stainless steel mandrel outside reinforced suppression and stainless steel mandrel upper end reinforced suppression processing, thereby make PTFE puddler axiality and surface smoothness when shaping processing, then through the effect of pressurization die sleeve 2, location support sleeve 7, pressurization slider 8 and pressurizing mechanism 9, make preliminary fashioned PTFE puddler carry out the pressure sintering treatment after the shaping, thereby make the PTFE puddler firm no fracture of PTFE parcel in the manufacturing process, the axiality is high, the surface is smooth, parcel thickness is even, thereby satisfy the demand to high axiality, high PTFE parcel fastness and use intensity of PTFE puddler when producing the preparation.
Claims (6)
1. The utility model provides a production device of high accuracy polytetrafluoroethylene puddler, includes shaping die sleeve (1) and pressurization die sleeve (2), its characterized in that still includes:
the lower die (3) is embedded and arranged on the inner wall of the bottom of the forming die sleeve (1), a placing through groove (4) matched with the stirring rod mandrel is formed in the inner wall of the lower die (3), and an upper pressing sleeve (5) and an upper die (6) which are respectively connected with the inner wall of the forming die sleeve (1) in a sliding manner are arranged above the stirring rod mandrel;
the positioning support sleeve (7), the positioning support sleeve (7) slides and sets up in the inner wall of pressurization die sleeve (2), and the top of positioning support sleeve (7) is provided with pressurization slider (8) with pressurization die sleeve (2) inner wall sliding connection, the positioning support sleeve (7) with the outside of pressurization slider (8) is provided with pressurization mechanism (9) jointly.
2. The production device of the high-precision polytetrafluoroethylene stirring rod according to claim 1, wherein: the pressurizing mechanism (9) includes:
the two adjusting blocks (91) are respectively in threaded connection with the top inner wall and the bottom inner wall of the pressurizing die sleeve (2);
the two high-temperature-resistant compression springs (92), the two high-temperature-resistant compression springs (92) are respectively arranged at the top of the pressurizing sliding block (8) and the bottom of the positioning supporting sleeve (7), and the other ends of the two high-temperature-resistant compression springs (92) are respectively contacted with the opposite surfaces of the two adjusting blocks (91).
3. The production device of the high-precision polytetrafluoroethylene stirring rod as claimed in claim 2, wherein: the diameter of the inner wall of the positioning support sleeve (7) and the diameter of the placing through groove (4) are equal to the diameter of the outer surface of the stirring rod mandrel.
4. The production device of the high-precision polytetrafluoroethylene stirring rod as claimed in claim 2, wherein: the outer surface diameter of the positioning support sleeve (7) and the outer surface diameter of the pressurizing sliding block (8) are equal to the inner wall diameter of the upper pressure sleeve (5).
5. The production device of the high-precision polytetrafluoroethylene stirring rod according to claim 1, wherein: the diameter of the outer surface of the upper pressing sleeve (5) is equal to that of the inner wall of the upper die (6) which is positioned above the lower die (3) of the forming die sleeve (1), and the diameter of the inner surface of the upper pressing sleeve (5) is equal to that of the outer surface of the stirring rod mandrel.
6. The production device of the high-precision polytetrafluoroethylene stirring rod according to claim 1, wherein: the vertical section of the lower die (3) is arranged in an inverted convex shape, and an arc chamfer is arranged at the convex shape of the lower die (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321850787.1U CN220464513U (en) | 2023-07-13 | 2023-07-13 | Production device of high-precision polytetrafluoroethylene stirring rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321850787.1U CN220464513U (en) | 2023-07-13 | 2023-07-13 | Production device of high-precision polytetrafluoroethylene stirring rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220464513U true CN220464513U (en) | 2024-02-09 |
Family
ID=89796315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321850787.1U Active CN220464513U (en) | 2023-07-13 | 2023-07-13 | Production device of high-precision polytetrafluoroethylene stirring rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220464513U (en) |
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2023
- 2023-07-13 CN CN202321850787.1U patent/CN220464513U/en active Active
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