CN117207418A - Device and method for preparing non-fault PTFE blank - Google Patents
Device and method for preparing non-fault PTFE blank Download PDFInfo
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- CN117207418A CN117207418A CN202311488179.5A CN202311488179A CN117207418A CN 117207418 A CN117207418 A CN 117207418A CN 202311488179 A CN202311488179 A CN 202311488179A CN 117207418 A CN117207418 A CN 117207418A
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- ejector pin
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 33
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 28
- 238000009434 installation Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 238000005056 compaction Methods 0.000 claims description 6
- 230000001174 ascending effect Effects 0.000 claims description 2
- 210000003437 trachea Anatomy 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- -1 Polytetrafluoroethylene Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Abstract
The invention relates to the technical field related to PTFE blank preparation, in particular to a device and a method for preparing a non-fault PTFE blank, which comprises a mounting platform, wherein a rail is fixedly arranged on the mounting platform, a sliding seat is connected onto the rail in a sliding manner, a die body is fixedly connected onto the sliding seat, a die cavity is formed in the upper surface of the die body, a mounting cavity is formed in the die body, the mounting cavity is arranged at the lower part of the die cavity and is communicated with the die cavity through a plurality of ejector rod holes, a plurality of groups of ejector pin mechanisms are arranged in the mounting cavity, the ejector pin mechanisms are respectively in one-to-one correspondence with the plurality of ejector rod holes, and the ejector pin mechanisms can plug the ejector rod holes and provide upward pushing force for material returning. According to the invention, when the material is returned, the blank can be jacked up through the second ejector pin and the protective rubber plate thereof, and the protective rubber plate arranged on the second ejector pin can flexibly push PTFE blank material, so that the quality of the blank during material returning is ensured.
Description
Technical Field
The invention relates to the related technical field of PTFE blank preparation, in particular to a device and a method for preparing a non-fault PTFE blank.
Background
The processing process of Polytetrafluoroethylene (PTFE) comprises the following steps: mixing, preforming, sintering and cooling, wherein the preforming is to uniformly add PTFE powder into a die, and press the PTFE powder into a compact preforming product, namely a blank at normal temperature.
After PTFE powder is pressed into a blank in a die, the blank is returned and taken out, and the damage to the blank is easy to occur, so that the production efficiency and quality are affected.
In addition, blank faults have been a problem in this field since the advent of PTFE articles, because faults directly result in non-uniformity in density throughout the body and indirectly result in subsequent product fiber breakage. The essence is that the internal gas of the blank column cannot be discharged in the preforming process, and the gas expands to cause blank fault during pressure relief. Therefore, how to smoothly discharge the gas in the green body becomes a technical problem that is difficult to overcome in the field of PTFE industry.
Disclosure of Invention
The invention aims to provide a device and a method for preparing a non-fault PTFE blank, which are used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a no fault PTFE blank preparation facilities, includes the mounting platform, fixedly mounted has the track on the mounting platform, and the upper surface of mounting platform passes through pole setting fixed mounting has the mounting panel, and mounting panel upper portion fixed mounting has hydraulic assembly, the output of hydraulic assembly runs through the mounting panel and is connected with the connecting piece behind, the connecting piece is connected with the clamp plate;
the die comprises a rail, a die body, a die cavity, a mounting cavity, a plurality of ejector rod holes, a plurality of groups of ejector rod mechanisms, a plurality of ejector rod mechanisms and a plurality of ejector rod holes, wherein the rail is connected with the slide in a sliding manner;
the bottom surface of installation chamber has seted up a plurality of piston grooves, piston groove and ejector pin hole one-to-one setting, and corresponding piston groove and ejector pin hole set up on same vertical line, the piston groove communicates through the spread groove each other, and has seted up the air cavity hole on one of them piston groove lateral wall, and the tip in air cavity hole is provided with the pipe connection head, the pipe connection head passes through the trachea and is connected with air feed equipment, slidable mounting has the piston among the piston groove, and the piston can drive thimble mechanism for shutoff to the ejector pin hole, perhaps provide ascending driving force for the material returned.
The side wall of the mounting cavity is fixedly provided with a ring gear, the middle position of the bottom of the mounting cavity is fixedly provided with a servo motor, the output shaft of the servo motor is fixedly provided with a rotary table, the rotary table is connected with a plurality of rotary shafts, the rotary shafts are rotationally connected with the rotary table, the lower ends of the rotary shafts are fixedly provided with transmission gears, the transmission gears are meshed with the ring gear, and a gap is reserved between two adjacent transmission gears;
the lower part of the transmission gear is connected with a thimble mechanism, the thimble mechanism comprises a vertical plate, the vertical plate is fixedly connected with the lower surface of the transmission gear, the lower part of the vertical plate is fixedly provided with a transverse plate, the transmission gear is provided with two symmetrical through holes, the transverse plate is slidably connected with a first thimble and a second thimble, the first thimble and the second thimble penetrate through the transverse plate, the outer side walls of the lower ends of the first thimble and the second thimble are fixedly sleeved with limiting seats, the limiting seats are arranged on the upper part of the transverse plate, the first thimble and the second thimble are respectively arranged in one-to-one correspondence with the two through holes and can slide upwards along the corresponding through holes, and when one through hole rotates to a position between a piston groove and a mandril hole and is coaxially arranged with the two through holes, a piston can drive the thimble corresponding to the through hole to move upwards into the mandril hole;
and the top end of the second thimble is fixedly connected with a protective rubber plate.
The upper surface of the limiting seat is provided with a spring groove, the first thimble and the second thimble are respectively sleeved with a reset spring, and the lower end of the reset spring is inserted into the spring groove on the limiting seat.
The piston is characterized in that a pull rod groove is formed in the piston, a pull rod is arranged in the pull rod groove, the lower end of the pull rod is fixedly connected with the bottom of the piston groove, the upper end of the pull rod is fixedly connected with a pull plate, the pull plate is slidably connected with the pull rod groove of the piston, the lower surface of the piston is fixedly connected with a limiting ring, the pull rod penetrates through the limiting ring and is limited by the limiting ring, a supporting spring is sleeved on the pull rod and is located between the pull plate and the limiting ring, and when the supporting spring is in a normal state, the piston is completely retracted into the piston groove.
The connecting piece includes movable plate, guide bar, connecting plate and buffer spring, movable plate and hydraulic assembly's output fixed connection, the guide bar run through the movable plate and with movable plate sliding connection, the upper end of guide bar is provided with the baffle, the lower extreme and the connecting plate fixed connection of guide bar, clamp plate fixed connection is in the lower part of connecting plate, buffer spring cover is established on the guide bar and is set up between movable plate and connecting plate.
The mounting platform is fixedly provided with an air cylinder, the air cylinder is located at the rear side end of the rail, and the air cylinder is used for driving the sliding seat.
The cylinder, the hydraulic assembly, the servo motor and the air supply equipment are all in electric signal connection with the control module, and the control module is fixedly installed at the front side end of the installation platform.
The preparation method of the non-fault PTFE blank comprises the following steps:
step one: in the feeding process, a servo motor is started to drive a transmission gear to rotate so that a first thimble is aligned with a mandril hole, then an air supply device is started, so that a piston is jacked, the piston jacks the first thimble into the mandril hole and is flush with the bottom surface of a die cavity, PTFE powder is uniformly added into the die cavity on a die body, and then a cylinder is driven to move the die body to the position right below a pressing plate;
step two: the primary pressurizing process is carried out, the hydraulic assembly is driven to drive the pressing plate to press down so as to extrude and shape PTFE powder, the molding pressure of the primary pressurizing process is 2MPa, the pressure maintaining time is 10 seconds, and then the hydraulic assembly 5 is driven to rise back for pressure relief for 10 seconds;
step three: a secondary pressurizing process, wherein the molding pressure in the secondary pressurizing process is 3MPa, the pressure is maintained for 1min after compaction, and then the pressure is relieved for 10 seconds;
step four: a third pressurizing process, wherein the molding pressure of the third pressurizing process is 4MPa, the pressure is maintained for 4min after compaction, and then the pressure is relieved to 1MPa in a natural state;
step five: in the material returning process, the air supply equipment stops supplying air, the piston falls back under the action of the resilience force of the supporting spring, the first thimble falls back under the action of the resilience force of the restoring spring, then the servo motor drives the transmission gear to rotate so as to adjust the second thimble to be aligned with the ejector rod hole, then the air supply equipment is started, the piston jacks up the second thimble, and the second thimble enters the ejector rod hole and moves upwards to a position higher than the bottom surface of the die cavity, so that the blank is jacked up, and material returning is completed.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, when the material is returned, the blank can be jacked up through the second ejector pin and the protective rubber plate thereof, and the protective rubber plate arranged on the second ejector pin can flexibly push PTFE blank material, so that the quality of the blank during material returning is ensured.
2. The invention has perfect integral structure and is matched with the preparation methods of primary pressurization, secondary pressurization and tertiary pressurization, so that the residual gas in the blank can be better discharged through the continuous pressurization and pressure relief processes of the primary pressurization process, the secondary pressurization process and the tertiary pressurization process and the two short pressure relief processes between the tertiary pressurization processes, the density uniformity of the subsequent blank is greatly improved, and the purpose of improving the product quality is achieved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a rear side view of the present invention;
FIG. 3 is a schematic view of the structure of the die body of the present invention;
FIG. 4 is an enlarged schematic view of the structure shown in FIG. 3A;
FIG. 5 is a schematic view of the structure of the turntable, the transmission gear, the thimble mechanism and the piston (from top view);
FIG. 6 is a schematic view of the structure of the turntable, the transmission gear, the thimble mechanism and the piston (from the bottom view);
FIG. 7 is a schematic view of the piston of the present invention;
FIG. 8 is a schematic view of the structure of the transmission gear and thimble mechanism of the present invention;
fig. 9 is a schematic structural view of the connector of the present invention.
In the figure: the device comprises a mounting platform 1, a sliding seat 2, a die body 3, an air cylinder 4, a hydraulic assembly 5, a connecting piece 6, a pressing plate 7, a control module 8, a track 9, a die cavity 10, a mounting cavity 11, a push rod hole 12, a piston groove 13, a connecting groove 14, an air cavity hole 15, a ring gear 16, a servo motor 17, a rotary table 18, a rotating shaft 19, a transmission gear 20, a vertical plate 21, a transverse plate 22, a through hole 23, a first thimble 24, a limiting seat 25, a reset spring 26, a piston 27, a second thimble 28, a limiting ring 29, a pulling plate 30, a supporting spring 31, a moving plate 32, a guide rod 33, a connecting plate 34, a buffer spring 35, a vertical rod 36, a mounting plate 37, a protective rubber plate 38 and a pulling rod 39.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-9, the present invention provides the following technical solutions: a preparation device for a non-fault PTFE blank comprises a mounting platform 1, wherein the mounting platform 1 is a rectangular platform. The rail 9 is fixedly installed on the installation platform 1, the installation plate 37 is fixedly installed on the upper surface of the installation platform 1 through four upright rods 36, the hydraulic assembly 5 is fixedly installed on the upper portion of the installation plate 37, the output end of the hydraulic assembly 5 penetrates through the installation plate 37 and then is connected with the connecting piece 6, and the connecting piece 6 is connected with the pressing plate 7. The hydraulic assembly 5 is a hydraulic cylinder.
As shown in fig. 1, 2 and 9, the connecting piece 6 includes a moving plate 32, a guide rod 33, a connecting plate 34 and a buffer spring 35, the moving plate 32 is fixedly connected with the output end of the hydraulic assembly 5, the guide rod 33 penetrates through the moving plate 32 and is slidably connected with the moving plate 32, a baffle is arranged at the upper end of the guide rod 33, and the guide rod 33 is prevented from sliding off from the moving plate 32. The lower end of the guide rod 33 is fixedly connected with the connecting plate 34, the pressing plate 7 is fixedly connected to the lower portion of the connecting plate 34, and the buffer spring 35 is sleeved on the guide rod 33 and is arranged between the moving plate 32 and the connecting plate 34. The arrangement of the structure can ensure that the pressing plate 7 has a buffering function when being pressed down, thereby better playing a protection role on PTFE blank materials and avoiding the damage to the PTFE blank caused by overlarge direct impact pressure.
The rail 9 is connected with the sliding seat 2 in a sliding manner, the mounting platform 1 is fixedly provided with the air cylinder 4, the air cylinder 4 is located at the rear side end of the rail 9, and the air cylinder 4 is used for driving the sliding seat 2.
As shown in fig. 1-8, the sliding seat 2 is fixedly connected with a mold body 3, the upper surface of the mold body 3 is provided with a mold cavity 10, the interior of the mold body 3 is provided with a mounting cavity 11, the mounting cavity 11 is arranged at the lower part of the mold cavity 10, and the mounting cavity 11 is communicated with the mold cavity 10 through four ejector rod holes 12. Four groups of ejector pin mechanisms are arranged in the mounting cavity 11, and the four ejector pin mechanisms are respectively in one-to-one correspondence with the four ejector pin holes 12. In the feeding and pressurizing processes, the ejector pin mechanism can plug the ejector pin hole 12, and in the material returning process, the ejector pin mechanism can push the pressed blank upwards, so that the material returning and the blank taking out are facilitated.
Four piston grooves 13 are formed in the bottom surface of the mounting cavity 11, the piston grooves 13 and the ejector rod holes 12 are arranged in one-to-one correspondence, and the corresponding piston grooves 13 and the ejector rod holes 12 are arranged on the same vertical line. The four piston grooves 13 are mutually communicated through a connecting groove 14, an air cavity hole 15 is formed in the side wall of one piston groove 13, and a pipeline connector is arranged at the end part of the air cavity hole 15 and connected with external air supply equipment through an air pipe. A piston 27 is slidably mounted in the piston groove 13, and the piston 27 can drive a thimble mechanism to plug the ejector rod hole 12 or provide upward pushing force for material returning.
Specifically, the ring gear 16 is fixedly installed on the side wall of the installation cavity 11, the servo motor 17 is fixedly installed in the middle of the bottom of the installation cavity 11, the rotary table 18 is fixedly installed on the output shaft of the servo motor 17, the rotary table 18 is connected with four rotary shafts 19, the rotary shafts 19 are rotationally connected with the rotary table 18, the transmission gears 20 are fixedly installed at the lower ends of the rotary shafts 19, and the transmission gears 20 are meshed with the ring gear 16. A gap is reserved between two adjacent transmission gears 20, namely, the two adjacent transmission gears 20 cannot be connected in a transmission way.
The lower part of drive gear 20 is connected with thimble mechanism, thimble mechanism includes riser 21, riser 21 and drive gear 20's lower fixed surface connection, and riser 21's lower part fixed mounting has diaphragm 22, has seted up two through-holes 23 of symmetry on the drive gear 20, sliding connection has first thimble 24 and second thimble 28 on the diaphragm 22, and first thimble 24 and second thimble 28 run through diaphragm 22 and set up, all fixed cover is equipped with spacing seat 25 on the lower extreme lateral wall of first thimble 24, second thimble 28, and spacing seat 25 sets up on diaphragm 22's upper portion, avoids first thimble 24, second thimble 28 landing. The first thimble 24 and the second thimble 28 are respectively arranged in one-to-one correspondence with the two through holes 23 and can slide upwards along the corresponding through holes 23, and when one through hole 23 rotates to a position between the piston groove 13 and the ejector rod hole 12 and is coaxially arranged with the two through holes, the piston 27 can drive the thimble corresponding to the through hole 23 to move upwards into the ejector rod hole 12. The main structures of the first thimble 24 and the second thimble 28 are the same in length, the top end of the second thimble 28 is fixedly connected with a protective rubber plate 38, and the height of the second thimble 28 plus the protective rubber plate 38 is higher than that of the first thimble 24, so that after the second thimble 28 enters the ejector rod hole 12, the protective rubber plate 38 can be higher than the bottom surface of the die cavity 10, the blank is jacked, and the protective rubber plate 38 is made of an elastic material, so that the blank is prevented from being damaged.
The upper surface of the limiting seat 25 is provided with a spring groove, the first thimble 24 and the second thimble 28 are respectively sleeved with a return spring 26, the lower ends of the return springs 26 are inserted into the spring groove on the limiting seat 25, and the return springs 26 facilitate the return of the first thimble 24 and the second thimble 28.
As shown in fig. 7, a pull rod groove is formed in the piston 27, a pull rod 39 is disposed in the pull rod groove, the lower end of the pull rod 39 is fixedly connected with the bottom of the piston groove 13, the upper end of the pull rod 39 is fixedly connected with a pull plate 30, the pull plate 30 is slidably connected with the pull rod groove of the piston 27, the lower surface of the piston 27 is fixedly connected with a limiting ring 29, the pull rod 39 penetrates through the limiting ring 29 and the pull plate 30 is limited by the limiting ring 29, a supporting spring 31 is sleeved on the pull rod 39, the supporting spring 31 is located between the pull plate 30 and the limiting ring 29, and when the supporting spring 31 is in a normal state, the piston 27 is completely retracted into the piston groove 13. An external air supply provides pressurized air which enters the piston groove 13 through the air cavity hole 15, so that the piston 27 is driven to move upwards along the piston groove 13, and the piston 27 is used for driving the thimble mechanism.
The cylinder 4, the hydraulic assembly 5, the servo motor 17 and the air supply equipment are all in electric signal connection with the control module 8, and the control module 8 is fixedly arranged at the front side end of the mounting platform 1.
The preparation method of the non-fault PTFE blank comprises the following steps:
step one: in the feeding process, the servo motor 17 is started to drive the turntable 18 to rotate, when the turntable 18 rotates around the central shaft of the turntable 18, the rotating shaft 19 is driven to move, the transmission gear 20 is driven by the rotating shaft 19 to interact with the ring gear 16, so that the transmission gear 20 performs autorotation, the transmission gear 20 drives the transverse plate 22 to rotate through the vertical plate 21, and the first ejector pin 24 is aligned with the ejector pin hole 12,
then starting air supply equipment, jacking a piston 27 by using pressure air, jacking a first ejector pin 24 into an ejector pin hole 12 by the piston 27 and flushing with the bottom surface of a die cavity 10 to enable the bottom surface of the die cavity 10 to be a plane, then uniformly adding PTFE powder into the die cavity 10 on a die body 3, and then driving an air cylinder 4 to move the die body 3 to the position right below a pressing plate 7;
step two: a primary pressurizing process, namely driving the hydraulic assembly 5 to drive the pressing plate 7 to press downwards so as to extrude and shape PTFE powder, wherein the molding pressure of the primary pressurizing process is 2MPa, the dwell time is 10 seconds, and then driving the hydraulic assembly 5 to rise back for pressure relief for 10 seconds;
step three: a secondary pressurizing process, wherein the molding pressure in the secondary pressurizing process is 3MPa, the pressure is maintained for 1min after compaction, and then the pressure is relieved for 10 seconds;
step four: a third pressurizing process, wherein the molding pressure of the third pressurizing process is 4MPa, the pressure is maintained for 4min after compaction, and then the pressure is relieved to 1MPa in a natural state;
step five: in the material returning process, the air supply device stops supplying air, the piston 27 falls back under the action of the resilience force of the supporting spring 31, the first thimble 24 falls back under the action of the resilience force of the restoring spring 26, is pulled out from the mandril hole 12,
the servo motor 17 drives the drive gear 20 to rotate to adjust the alignment of the second ejector pin 28 with one of the ejector pin holes 12 (the cooperation and design of the drive gear 20, the ring gear 16, the rotating shaft 19 and the turntable 18, after the drive gear 20 rotates 180 degrees, just aligns the second ejector pin 28 with one of the ejector pin holes 12),
then the air supply equipment is started again, the piston 27 jacks up the second ejector pin 28, the second ejector pin 28 enters the ejector pin hole 12, and the protective rubber plate 38 moves upwards to a position higher than the bottom surface of the die cavity 10, so that the blank is jacked up, the material is conveniently taken out, and material returning is completed.
Claims (8)
1. A device for preparing a non-fault PTFE blank, which is characterized in that: the hydraulic device comprises a mounting platform (1), wherein a track (9) is fixedly mounted on the mounting platform (1), a mounting plate (37) is fixedly mounted on the upper surface of the mounting platform (1) through a vertical rod (36), a hydraulic component (5) is fixedly mounted on the upper portion of the mounting plate (37), a connecting piece (6) is connected to the output end of the hydraulic component (5) after penetrating through the mounting plate (37), and a pressing plate (7) is connected to the connecting piece (6);
the die comprises a rail (9), wherein a sliding seat (2) is connected onto the rail (9) in a sliding manner, a die body (3) is fixedly connected onto the sliding seat (2), a die cavity (10) is formed in the upper surface of the die body (3), an installation cavity (11) is formed in the die body (3), the installation cavity (11) is arranged at the lower part of the die cavity (10) and is communicated with the die cavity (10) through a plurality of ejector rod holes (12), a plurality of groups of ejector pin mechanisms are arranged in the installation cavity (11), the ejector pin mechanisms and the ejector rod holes (12) are in one-to-one correspondence, and the ejector pin mechanisms can plug the ejector rod holes (12) and provide upward pushing force for material returning;
the bottom surface of installation cavity (11) has seted up a plurality of piston grooves (13), piston groove (13) and ejector pin hole (12) one-to-one set up, and corresponding piston groove (13) and ejector pin hole (12) set up on same vertical line, piston groove (13) communicate through spread groove (14) each other, and have seted up air cavity hole (15) on one of them piston groove (13) lateral wall, and the tip of air cavity hole (15) is provided with the pipe connection head, the pipe connection head is connected with air feed equipment through the trachea, slidable mounting has piston (27) among piston groove (13), and piston (27) can drive ejector pin mechanism for shutoff to ejector pin hole (12), perhaps provide ascending propulsion for the material that returns.
2. The apparatus for preparing a non-faulty PTFE blank according to claim 1, wherein: the device is characterized in that a ring gear (16) is fixedly arranged on the side wall of the installation cavity (11), a servo motor (17) is fixedly arranged at the middle position of the bottom of the installation cavity (11), a rotary table (18) is fixedly arranged on an output shaft of the servo motor (17), the rotary table (18) is connected with a plurality of rotary shafts (19), the rotary shafts (19) are rotationally connected with the rotary table (18), transmission gears (20) are fixedly arranged at the lower ends of the rotary shafts (19), the transmission gears (20) are meshed with the ring gear (16), and a gap is reserved between every two adjacent transmission gears (20);
the lower part of the transmission gear (20) is connected with a thimble mechanism, the thimble mechanism comprises a vertical plate (21), the vertical plate (21) is fixedly connected with the lower surface of the transmission gear (20), a transverse plate (22) is fixedly arranged at the lower part of the vertical plate (21), two symmetrical through holes (23) are formed in the transmission gear (20), a first thimble (24) and a second thimble (28) are connected to the transverse plate (22) in a sliding manner, the first thimble (24) and the second thimble (28) penetrate through the transverse plate (22) and are arranged, limiting seats (25) are fixedly sleeved on the outer side walls of the lower ends of the first thimble (24) and the second thimble (28), the limiting seats (25) are arranged on the upper part of the transverse plate (22), the first thimble (24) and the second thimble (28) are respectively arranged in one-to-one correspondence with the two through holes (23) and can slide upwards along the corresponding through holes (23), and when the through holes (23) rotate to the position between a piston groove (13) and a mandril hole (12) and are coaxially arranged, the two mandril (23) can move upwards and the mandril (27) can move into the corresponding mandril (12);
the top end of the second thimble (28) is fixedly connected with a protective rubber plate (38).
3. The apparatus for preparing a non-faulty PTFE blank according to claim 2, wherein: the upper surface of the limiting seat (25) is provided with a spring groove, the first thimble (24) and the second thimble (28) are respectively sleeved with a return spring (26), and the lower end of the return spring (26) is inserted into the spring groove on the limiting seat (25).
4. A device for preparing a non-faulty PTFE blank according to claim 3, characterized in that: the piston (27) is internally provided with a pull rod groove, a pull rod (39) is arranged in the pull rod groove, the lower end of the pull rod (39) is fixedly connected with the groove bottom of the piston groove (13), the upper end of the pull rod (39) is fixedly connected with a pull plate (30), the pull plate (30) is slidably connected with the pull rod groove of the piston (27), the lower surface of the piston (27) is fixedly connected with a limiting ring (29), the pull rod (39) penetrates through the limiting ring (29) and the pull plate (30) is limited by the limiting ring (29), a supporting spring (31) is sleeved on the pull rod (39), the supporting spring (31) is located between the pull plate (30) and the limiting ring (29), and when the supporting spring (31) is in a normal state, the piston (27) is completely retracted into the piston groove (13).
5. The apparatus of claim 4, wherein: the connecting piece (6) comprises a moving plate (32), a guide rod (33), a connecting plate (34) and a buffer spring (35), wherein the moving plate (32) is fixedly connected with the output end of the hydraulic assembly (5), the guide rod (33) penetrates through the moving plate (32) and is slidably connected with the moving plate (32), a baffle is arranged at the upper end of the guide rod (33), the lower end of the guide rod (33) is fixedly connected with the connecting plate (34), the pressing plate (7) is fixedly connected to the lower portion of the connecting plate (34), and the buffer spring (35) is sleeved on the guide rod (33) and is arranged between the moving plate (32) and the connecting plate (34).
6. The apparatus of claim 5, wherein: the mounting platform (1) is fixedly provided with an air cylinder (4), the air cylinder (4) is located at the rear side end of the track (9), and the air cylinder (4) is used for driving the sliding seat (2).
7. The apparatus of claim 6, wherein: the air cylinder (4), the hydraulic assembly (5), the servo motor (17) and the air supply equipment are all in electric signal connection with the control module (8), and the control module (8) is fixedly installed at the front side end of the installation platform (1).
8. The apparatus for preparing a non-faulty PTFE blank according to claim 7, wherein: the preparation method comprises the following steps:
step one: in the feeding process, a servo motor (17) is started to drive a transmission gear (20) to rotate, so that a first thimble (24) is aligned with a mandril hole (12), then an air supply device is started, so that a piston (27) is jacked, the piston (27) jacks the first thimble (24) into the mandril hole (12) and is flush with the bottom surface of a die cavity (10), PTFE powder is uniformly added into the die cavity (10) on a die body (3), and then a cylinder (4) is driven to move the die body (3) to the position right below a pressing plate (7);
step two: the method comprises the steps of (1) in a primary pressurizing process, driving a hydraulic assembly (5) to drive a pressing plate (7) to press down so as to extrude and shape PTFE powder, wherein the molding pressure in the primary pressurizing process is 2MPa, the dwell time is 10 seconds, and then driving the hydraulic assembly 5 to rise back for pressure relief for 10 seconds;
step three: a secondary pressurizing process, wherein the molding pressure in the secondary pressurizing process is 3MPa, the pressure is maintained for 1min after compaction, and then the pressure is relieved for 10 seconds;
step four: a third pressurizing process, wherein the molding pressure of the third pressurizing process is 4MPa, the pressure is maintained for 4min after compaction, and then the pressure is relieved to 1MPa in a natural state;
step five: in the material returning process, the air supply equipment stops supplying air, the piston (27) falls back under the action of the resilience force of the supporting spring (31), the first thimble (24) falls back under the action of the resilience force of the restoring spring (26), then the servo motor (17) drives the transmission gear (20) to rotate so as to adjust the second thimble (28) to be aligned with the ejector rod hole (12), then the air supply equipment is started, the piston (27) jacks up the second thimble (28), and the second thimble (28) enters the ejector rod hole (12) and moves upwards to a position higher than the bottom surface of the die cavity (10), so that the blank is jacked up, and material returning is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| GB1088039A (en) * | 1963-10-15 | 1967-10-18 | Rexall Drug Chemical | Improvements in or relating to the manufacture of articles of plastics using extrusion apparatus |
| CN101161403A (en) * | 2007-11-20 | 2008-04-16 | 湘潭电机股份有限公司 | A vertical type assembling apparatus for planetary gear |
| CN101486085A (en) * | 2009-02-19 | 2009-07-22 | 武汉渝科机电科技有限公司 | Flat cut type plate-casting machine |
| CN209424393U (en) * | 2018-12-16 | 2019-09-24 | 泰州鼎鑫齿轮有限公司 | A kind of gear hot extrusion molding auxiliary processing device |
| CN111687364A (en) * | 2020-06-16 | 2020-09-22 | 杭州泽逸机械有限公司 | Needle roller blank forming equipment and blank forming process using same |
| CN216858991U (en) * | 2022-01-18 | 2022-07-01 | 盐城三丰机械有限公司 | Gear production equipment convenient for feeding and discharging |
| CN115156948A (en) * | 2022-07-21 | 2022-10-11 | 余江县富昌模具配件有限公司 | Mold thimble hole positioning and machining device and method |
-
2023
- 2023-11-09 CN CN202311488179.5A patent/CN117207418B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1088039A (en) * | 1963-10-15 | 1967-10-18 | Rexall Drug Chemical | Improvements in or relating to the manufacture of articles of plastics using extrusion apparatus |
| CN101161403A (en) * | 2007-11-20 | 2008-04-16 | 湘潭电机股份有限公司 | A vertical type assembling apparatus for planetary gear |
| CN101486085A (en) * | 2009-02-19 | 2009-07-22 | 武汉渝科机电科技有限公司 | Flat cut type plate-casting machine |
| CN209424393U (en) * | 2018-12-16 | 2019-09-24 | 泰州鼎鑫齿轮有限公司 | A kind of gear hot extrusion molding auxiliary processing device |
| CN111687364A (en) * | 2020-06-16 | 2020-09-22 | 杭州泽逸机械有限公司 | Needle roller blank forming equipment and blank forming process using same |
| CN216858991U (en) * | 2022-01-18 | 2022-07-01 | 盐城三丰机械有限公司 | Gear production equipment convenient for feeding and discharging |
| CN115156948A (en) * | 2022-07-21 | 2022-10-11 | 余江县富昌模具配件有限公司 | Mold thimble hole positioning and machining device and method |
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| CN117207418B (en) | 2024-01-12 |
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