CN112721096A

CN112721096A - Extruder head and polytetrafluoroethylene extruder

Info

Publication number: CN112721096A
Application number: CN202011359225.8A
Authority: CN
Inventors: 杨文光; 孙克原; 王孝刚; 刘雪梅; 张敏华; 陈佩民
Original assignee: Nanjing Comptech Composites Corp
Current assignee: Nanjing Comptech Composites Corp
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-04-30

Abstract

The invention relates to the technical field of extruders, in particular to an extruder head and a polytetrafluoroethylene extruder, which comprises an extruder head body, the extruder head body comprises an extruder head shell and a first material groove, the first material groove is arranged in the extruder head shell, a transposition disc is rotatably arranged in the shell of the machine head, a plurality of second material grooves are circumferentially arranged on the transposition disc, the second material groove is matched with the first material groove, the extruder head body also comprises a plurality of groups of locking mechanisms and cleaning mechanisms, a first water cavity and a second water cavity are respectively arranged in the shell of the machine head in the same vertical direction and are communicated with each other through a water tank, a push plate is arranged in the first water cavity in a sliding mode, one end of the push plate is elastically connected with the machine head shell, an air bag is further bonded in the first water cavity, and the air bag is in interference fit with the push plate; the cleaning mechanism is arranged, so that the extruder head can be cleaned in time instead of manual work.

Description

Extruder head and polytetrafluoroethylene extruder

Technical Field

The invention relates to the technical field of extruders, in particular to an extruder head and a polytetrafluoroethylene extruder.

Background

Polytetrafluoroethylene, commonly known as "plastic king", is a high molecular polymer prepared by polymerization using tetrafluoroethylene as a monomer. The material has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, and is almost insoluble in all solvents. Meanwhile, the polytetrafluoroethylene has the characteristic of high temperature resistance, has extremely low friction coefficient, can be used for lubricating, and becomes an ideal coating for easily cleaning the inner layer of the water pipe.

The extruder head applied to the existing polytetrafluoroethylene extruder is simple in structure and single in effect, cannot be suitable for dies of different models, and needs to be cleaned in time by workers after extrusion work, otherwise, the inside of the extruder head is easily blocked, and the next extrusion work is influenced.

Disclosure of Invention

The invention aims to provide an extruder head and a polytetrafluoroethylene extruder so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an extruder head, includes the extruder head body, the extruder head body is including extruding aircraft nose shell and first silo, first silo sets up in the aircraft nose shell, the transposition dish is installed to the aircraft nose shell internal rotation, circumference is equipped with a plurality of second silos on the transposition dish, the second silo cooperatees with first silo, the extruder head body still includes multiunit locking mechanism and clearance mechanism, be equipped with first water cavity and second water cavity on the inherent same vertical direction of aircraft nose shell respectively, through the basin intercommunication between first water cavity and the second water cavity, slidable mounting has the push pedal in the first water cavity, elastic connection between the one end of push pedal and the aircraft nose shell, it has the gasbag still to bond in the first water cavity, conflict cooperation between gasbag and the push pedal.

Further: clearance mechanism includes that slidable mounting lays the brush strip on the installation piece at installation piece and a plurality of circumference in the aircraft nose shell, it is articulated between the one end of brush strip and the installation piece, the articulated department of brush strip is equipped with the torsional spring, the one end fixed mounting of installation piece has the push rod, fixed cover is equipped with the swivel nut on the push rod, screw-thread fit between swivel nut and the aircraft nose shell, the basin internal rotation is installed and is changeed the leaf, be equipped with the spacing groove in the push rod, change the coaxial fixed mounting of leaf have with spacing groove matched with card strip.

Further: the diameter of the second trough is gradually increased along the clockwise direction.

Further: the transposition disc is provided with ring teeth, a gear meshed with the ring teeth is rotatably arranged in the machine head shell, and a stepping motor used for driving the gear is further arranged in the machine head shell.

And further: locking mechanism circumference is laid in the one end of aircraft nose shell, locking mechanism includes locking strip, kelly and draw-in groove, the one end of locking strip articulates on the aircraft nose shell, the articulated department of locking strip is equipped with the torsional spring, the draw-in groove sets up in the locking strip, be equipped with the guide way in the aircraft nose shell, slidable mounting has the slider in the guide way, elastic connection between the one end of slider and guide way, kelly fixed mounting is on the slider, the one end of aircraft nose shell slides and inserts and is equipped with to the touch panel, elastic connection between the one end of touch panel and the aircraft nose shell.

And further: the guide groove is obliquely arranged relative to the machine head shell, the clamping rod is L-shaped, and the clamping rod interferes with the moving path of the touch plate.

The utility model provides a polytetrafluoroethylene extruder, includes frame and a plurality of spike, still includes foretell extruder head, spike symmetry fixed mounting is on the frame, fixed mounting has defeated material auger on the frame, be equipped with the heating chamber rather than the intercommunication on the defeated material auger, the one end of defeated material auger is equipped with the joint, the peripheral circumference that connects is equipped with a plurality of and locking bar matched with locked groove, connect and extrude the installation of aircraft nose body detachable.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

1. the invention is provided with an extruder head body, an extruder head shell, a first material groove, a transposition disc, a second material groove, a ring gear, a stepping motor, an air bag, a push plate, a first water cavity and a second water cavity, the gear rotates through the electrification work of the stepping motor, the transposition disc is driven to rotate under the meshing action between the gear and the ring gear, so that the change of the position of the second material groove with different diameters is realized, the whole device can adapt to molds with different models, when polytetrafluoroethylene in a molten state passes through the first material groove, under the action of thermal expansion and cold contraction, the air bag expands, so that the air bag generates a collision action with the push plate, further water in the first water cavity is injected into the second water cavity through the water groove, in the process, the collision action between the water and a rotating blade is generated, the rotating blade is rotated, and a clamping strip is driven to rotate, under the cooperation between card strip and the spacing groove for the push rod rotates, and under the screw-thread fit between swivel nut and the aircraft nose shell, make the push rod drive the installation piece and remove to the second silo from the aircraft nose shell in, and under the effect of torsional spring, make the brush strip carry out the cleaning work to the second silo inner wall of different diameters size, thereby avoid the second silo in to take place the phenomenon of jam, influence extrusion efficiency.

2. According to the invention, through the arrangement of the locking mechanism, the locking bar, the locking groove, the touch plate, the guide groove, the slider, the clamping rod and the clamping groove, the touch action is generated between the external extruder and the touch plate, so that the touch plate and the clamping rod collide, the clamping rod is enabled to move along the inclined direction under the matching between the slider and the guide groove, so that the clamping rod is enabled to be separated from the clamping groove, the limitation on the locking bar is further removed, the locking bar rotates under the action of the torsion spring, and the external extruder is fastened, so that the locking mechanism is simpler and more convenient than the traditional bolt fixed connection mode, and the time is saved.

Drawings

FIG. 1 is a schematic structural diagram of an extruder head and a polytetrafluoroethylene extruder;

FIG. 2 is a schematic structural diagram of an extruder head and an extruder head body in a polytetrafluoroethylene extruder;

FIG. 3 is an enlarged partial structural view of an extruder head and a locking mechanism in a polytetrafluoroethylene extruder;

FIG. 4 is an enlarged partial structural view of an extruder head and a cleaning mechanism in a polytetrafluoroethylene extruder;

FIG. 5 is a schematic structural diagram of an extruder head and a position changing disk in a polytetrafluoroethylene extruder.

The reference numerals in the schematic drawings illustrate:

1-machine base, 2-supporting feet, 3-heating cavity, 4-material conveying auger, 5-joint, 6-extrusion machine head body, 61-machine head shell, 62-first material groove, 63-transposition disk, 64-second material groove, 65-ring tooth, 66-gear, 67-stepping motor, 68-locking mechanism, 681-locking bar, 682-locking groove and 683-touch plate, 684-guide groove, 685-slide block, 686-clamping rod, 687-clamping groove, 69-cleaning mechanism, 691-mounting block, 692-brush bar, 693-push rod, 694-rotating blade, 695-screw sleeve, 696-limit groove, 697-clamping bar, 70-air bag, 71-push plate, 72-first water cavity and 73-second water cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention, and the present invention is further described with reference to the embodiments below.

Referring to fig. 2, 4 and 5, in an embodiment of the present invention, an extruder head includes an extruder head body 6, the extruder head body 6 includes an extruder head housing 61 and a first material groove 62, the first material groove 62 is disposed in the extruder head housing 61, a shifting disc 63 is rotatably mounted in the extruder head housing 61, a plurality of second material grooves 64 are circumferentially disposed on the shifting disc 63, diameters of the second material grooves 64 are gradually increased along a clockwise direction, the second material grooves 64 are matched with the first material groove 62, a ring gear 65 is disposed on the shifting disc 63, a gear 66 engaged with the ring gear 65 is rotatably mounted in the extruder head housing 61, a stepping motor 67 for driving the gear 66 is further disposed in the extruder head housing 61, the extruder head body 6 further includes a plurality of sets of locking mechanisms 68 and cleaning mechanisms 69, a first water cavity 72 and a second water cavity 73 are respectively disposed in the same vertical direction in the extruder head housing 61, the cleaning device is characterized in that the first water cavity 72 and the second water cavity 73 are communicated through a water tank, a push plate 71 is slidably mounted in the first water cavity 72, one end of the push plate 71 is elastically connected with the handpiece shell 61, an air bag 70 is further bonded in the first water cavity 72, the air bag 70 is in interference fit with the push plate 71, the cleaning mechanism 69 comprises a mounting block 691 and a plurality of brush strips 692 circumferentially arranged in the handpiece shell 61, the one end of each brush strip 692 is hinged with the mounting block 691, a torsion spring is arranged at the hinged position of each brush strip 692, a push rod 693 is fixedly mounted at one end of the mounting block 691, a threaded sleeve 695 is fixedly arranged on the push rod 693, a rotating blade 694 is rotatably mounted in the water tank, a limit groove 696 is arranged in the push rod 693, and a clamping strip 697 matched with the limit groove 696 is coaxially and fixedly mounted on the rotating blade 694, the mounting block 691 is at the same level as one of the second troughs 64 on the index plate 63.

In practical application, the gear 66 is rotated by electrifying the stepping motor 67, the transposition disk 63 is driven to rotate under the meshing action between the gear 66 and the ring gear 65, so that the position of the second material groove 64 with different diameters is changed, the whole device can adapt to molds with different models, when the polytetrafluoroethylene in a molten state passes through the first material groove 62, under the action of thermal expansion and cold contraction, the air bag 70 is expanded, so that the air bag collides with the push plate 71, so that water in the first water cavity 72 is injected into the second water cavity 73 through the water groove, in the process, the water collides with the rotating blade 694, the rotating blade 694 rotates, the clamping strip 697 is driven to rotate, under the matching between the clamping strip 697 and the limiting groove 696, the push rod 693 rotates, and under the threaded matching between the threaded sleeve 695 and the handpiece shell 61, the push rod 693 drives the mounting block 691 to move from the handpiece shell 61 to the second trough 64, and under the action of the torsion spring, the brush strip 692 performs cleaning work on the inner wall of the second trough 694 with different diameters, so that the phenomenon that the second trough 694 is blocked is avoided, and the extrusion efficiency is influenced.

Further, referring to fig. 2 and 3, as a preferred embodiment of the present invention, the locking mechanism 68 is circumferentially disposed at one end of the handpiece housing 61, the locking mechanism 68 comprises a locking bar 681, a clamping rod 686 and a clamping groove 687, one end of the locking bar 681 is hinged on the machine head shell 61, a torsional spring is arranged at the hinged position of the locking strip 681, the clamping groove 687 is arranged in the locking strip 681, a guide groove 684 is arranged in the handpiece shell 61, the guide groove 684 is obliquely arranged relative to the handpiece shell 61, a sliding block 685 is slidably installed in the guide groove 684, the sliding block 685 is elastically connected with one end of the guide groove 684, the retaining rod 686 is fixedly installed on the sliding block 685, and the clamping rod 686 is L-shaped, one end of the machine head shell 61 is slidably inserted with a contact plate 683, one end of the abutting plate 683 is elastically connected with the handpiece shell 61, and the clamping rod 686 interferes with the moving path of the abutting plate 683.

In practical application, through taking place conflict effect between external extruder and conflict board 683, thereby make conflict board 683 and kelly 686 bump, under the cooperation between slider 685 and guide way 684, make kelly 686 remove along the incline direction, thereby make kelly 686 break away from draw-in groove 687, and then break away from the restriction to locking strip 681, make locking strip 681 rotate under the effect of torsional spring, thereby fasten external extruder, more simple and convenient and save time than traditional bolt fixed connection's mode.

Referring to fig. 1 and 2, in an embodiment of the present invention, a polytetrafluoroethylene extruder with an extruder head according to the above embodiment includes a base 1 and a plurality of supporting feet 2, the supporting feet 2 are symmetrically and fixedly mounted on the base 1, a material conveying auger 4 is fixedly mounted on the base 1, a heating cavity 3 communicated with the material conveying auger 4 is disposed on the material conveying auger 4, a connector 5 is disposed at one end of the material conveying auger 4, a plurality of locking grooves 682 matched with a locking strip 681 are circumferentially disposed on the periphery of the connector 5, and the connector 5 is detachably mounted on an extruder head body 6.

In practical application, the polytetrafluoroethylene is placed in the heating cavity 3 for heating, and the polytetrafluoroethylene in the melting state in the heating cavity 3 is conveyed into the extruder head body 6 from the joint 5 through the material conveying auger 4, so that the polytetrafluoroethylene can be injected into a mold.

With the above embodiment, the working principle of the present invention is as follows:

when the device is used, the abutting plate 683 collides with the clamping rod 686 under the abutting action between the joint 5 and the abutting plate 683, the clamping rod 686 moves in the inclined direction under the matching between the sliding block 685 and the guide groove 684, so that the clamping rod 686 is separated from the clamping groove 687 and further separated from the limitation on the locking strip 681, the locking strip 681 rotates under the action of the torsion spring and is clamped in the locking groove 682, polytetrafluoroethylene is placed in the heating cavity 3 for heating, the polytetrafluoroethylene in a molten state in the heating cavity 3 is conveyed into the extruder head body 6 from the joint 5 through the conveying auger 4, the stepping motor 67 is electrified for working, so that the gear 66 rotates, the transposition disc 63 is driven to rotate under the meshing action between the gear 66 and the ring gear 65, the position of the second trough 64 with different diameters is changed, and the whole device can adapt to molds with different models, when the molten polytetrafluoroethylene passes through the first trough 62, under the action of thermal expansion and cold contraction, so that the air bag 70 is expanded to generate interference with the push plate 71, and the water in the first water chamber 72 is injected into the second water chamber 73 through the water tank, in the process, the water collides with the rotating blade 694, and the rotating blade 694 rotates to drive the clamping strip 697 to rotate, under the matching between the clamping strip 697 and the limiting groove 696, the push rod 693 is rotated, and under the threaded matching between the screw sleeve 695 and the handpiece shell 61, so that the push rod 693 drives the mounting block 691 to move from the handpiece shell 61 into the second trough 64, under the action of the torsion spring, the brush strip 692 cleans the inner walls of the second trough 694 with different diameters, so that the phenomenon that the second trough 694 is blocked is avoided, and the extrusion efficiency is influenced.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The extrusion head comprises an extrusion head body (6) and is characterized in that the extrusion head body (6) comprises an extrusion head shell (61) and a first trough (62), the first trough (62) is arranged in the extrusion head shell (61), a transposition disc (63) is rotatably arranged in the extrusion head shell (61), a plurality of second troughs (64) are circumferentially arranged on the transposition disc (63), the second troughs (64) are matched with the first troughs (62), the extrusion head body (6) further comprises a plurality of groups of locking mechanisms (68) and a cleaning mechanism (69), a first water cavity (72) and a second water cavity (73) are respectively arranged in the extrusion head shell (61) in the same vertical direction, the first water cavity (72) is communicated with the second water cavity (73) through a water channel, and a push plate (71) is slidably arranged in the first water cavity (72), elastic connection between one end of push pedal (71) and aircraft nose shell (61), gasbag (70) have still bonded in first water cavity (72), conflict cooperation between gasbag (70) and push pedal (71).

2. The extruder head according to claim 1, wherein the cleaning mechanism (69) comprises a mounting block (691) slidably mounted in the head housing (61) and a plurality of brush strips (692) circumferentially arranged on the mounting block (691), one end of each brush strip (692) is hinged to the mounting block (691), a torsion spring is arranged at the hinged position of each brush strip (692), a push rod (693) is fixedly mounted at one end of the mounting block (691), a threaded sleeve (695) is fixedly sleeved on the push rod (693), the threaded sleeve (695) is in threaded fit with the head housing (61), a rotating vane (694) is mounted on the rotating water tank, a limiting groove (696) is arranged in the push rod (693), and a clamping strip (697) matched with the limiting groove (696) is coaxially and fixedly mounted on the rotating vane (694).

3. Extruder head according to claim 1, characterized in that the diameter of the second channel (64) increases successively in the clockwise direction.

4. The extruder head according to claim 1, wherein the index plate (63) is provided with ring teeth (65), a gear (66) engaged with the ring teeth (65) is rotatably mounted in the extruder head housing (61), and a stepping motor (67) for driving the gear (66) is further arranged in the extruder head housing (61).

5. Extruder head according to claim 1, wherein the locking mechanism (68) is arranged circumferentially at one end of the head housing (61), the locking mechanism (68) comprises a locking bar (681), a clamping rod (686) and a clamping groove (687), one end of the locking strip (681) is hinged on the machine head shell (61), a torsional spring is arranged at the hinged position of the locking strip (681), the clamping groove (687) is arranged in the locking strip (681), a guide groove (684) is arranged in the machine head shell (61), a sliding block (685) is arranged in the guide groove (684) in a sliding mode, the sliding block (685) is elastically connected with one end of the guide groove (684), the clamping rod (686) is fixedly arranged on the sliding block (685), one end of the machine head shell (61) is inserted with a contact plate (683) in a sliding manner, one end of the abutting plate (683) is elastically connected with the machine head shell (61).

6. Extruder head according to claim 5, characterized in that the guide groove (684) is arranged obliquely with respect to the head housing (61) and the catch lever (686) is "L" -shaped, the catch lever (686) interfering with the path of movement of the interference plate (683).

7. The utility model provides a polytetrafluoroethylene extruder, includes frame (1) and a plurality of spike (2), its characterized in that still includes the extruder head of any of claims 1-6, the fixed mounting of spike (2) symmetry is on frame (1), fixed mounting has defeated material auger (4) on frame (1), be equipped with heating chamber (3) rather than the intercommunication on defeated material auger (4), the one end of defeated material auger (4) is equipped with joint (5), the peripheral circumference that connects (5) is equipped with a plurality of and locking bar (681) matched with locked groove (682), joint (5) and the installation of extruder head body (6) detachable.