CN210791779U - Injection type polytetrafluoroethylene oil seal mould - Google Patents
Injection type polytetrafluoroethylene oil seal mould Download PDFInfo
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- CN210791779U CN210791779U CN201921424378.9U CN201921424378U CN210791779U CN 210791779 U CN210791779 U CN 210791779U CN 201921424378 U CN201921424378 U CN 201921424378U CN 210791779 U CN210791779 U CN 210791779U
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Abstract
The utility model discloses an injection type polytetrafluoroethylene oil seal mould, which comprises an upper template, a middle template and a lower template, wherein the upper template is provided with at least one upper mould core, and the lower end part of the upper mould core is provided with a feeding bulge; the middle template is provided with middle template components which correspond to the upper template cores one by one, and a first anti-rotation mechanism for preventing the middle template components from rotating relative to the middle template is arranged between the middle template components and the middle template; install on the lower bolster with well die component one-to-one's lower die component, lower die component with be equipped with between the lower bolster and be used for preventing lower die component is relative the rotatory second of lower bolster is prevented rotary mechanism. The utility model discloses can produce the polytetrafluoroethylene oil blanket that has last spiral oil gallery and spiral oil gallery down, can accurate control go up the spiral oil gallery and the relative position between the spiral oil gallery down, improve the qualification rate of product, improve the quality of product.
Description
Technical Field
The utility model relates to an injection type polytetrafluoroethylene oil seal mould.
Background
At present, the polytetrafluoroethylene oil seal is a type of oil seal which is widely applied and comprises a framework and a lip sheet made of polytetrafluoroethylene, and the framework and a part of the lip sheet are wrapped by glue to form the oil seal. In order to improve the sealing performance of the polytetrafluoroethylene oil seal, the upper surface of the lip is provided with an upper spiral oil return groove, the lower surface of the lip is provided with a lower spiral oil return groove, but the upper spiral oil return groove and the lower spiral oil return groove of the polytetrafluoroethylene oil seal produced by the existing die can deflect and dislocate, and the upper spiral oil return groove and the lower spiral oil return groove can be damaged by dislocation due to the fact that the lip is very thin, so that the product quality is influenced.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide an injection type polytetrafluoroethylene oil blanket mould, it can produce the polytetrafluoroethylene oil blanket that has last spiral oil gallery and spiral oil gallery down, can accurate control go up the spiral oil gallery and spiral oil gallery down relative position between, improve the qualification rate of product, improve the quality of product.
In order to solve the technical problem, the technical scheme of the utility model is that: an injection type polytetrafluoroethylene oil seal die comprises a skeleton and a lip, wherein the upper surface of the lip is provided with an upper spiral oil return groove, the lower surface of the lip is provided with a lower spiral oil return groove, the injection type polytetrafluoroethylene oil seal die comprises an upper die plate, a middle die plate and a lower die plate which are sequentially arranged from top to bottom, wherein,
the upper template is provided with at least one upper mold core, and the lower end part of the upper mold core is provided with a feeding bulge;
the middle template is provided with middle template components which correspond to the upper template cores one by one, and the upper end part of the middle template component is provided with a feeding cavity matched with the feeding bulge;
the lower end part of the middle die assembly is provided with a middle die cavity, and the middle die assembly is also provided with an upper spiral forming part for forming the upper spiral oil return groove and at least one feeding hole for communicating the feeding cavity with the middle die cavity;
a first anti-rotation mechanism for preventing the middle die core assembly from rotating relative to the middle die plate is arranged between the middle die core assembly and the middle die plate;
the lower template is provided with lower die core assemblies which correspond to the middle die core assemblies one by one, the lower die core assemblies are provided with lower die cavities and positioning parts positioned in the lower die cavities, and the positioning parts are used for sleeving the framework and supporting the lip piece so as to fix the positions of the framework and the lip piece;
the positioning part is provided with a lower spiral forming part for forming the lower spiral oil return groove, and the lip piece part is positioned on the lower spiral forming part;
a second anti-rotation mechanism for preventing the lower die core assembly from rotating relative to the lower template is arranged between the lower die core assembly and the lower template;
when the upper template, the middle template and the lower template are assembled, the feeding protrusion extends into the feeding cavity, the upper end part of the lower die core assembly extends into the middle die cavity, the upper spiral forming part extends into the lower die cavity and presses the lip part on the lower spiral forming part, and the middle die core assembly and the lower die core assembly surround to form a forming die cavity which is used for forming the polytetrafluoroethylene oil seal and is communicated with the feeding hole;
and a positioning device used for fixing the circumferential position of the middle die assembly relative to the lower die assembly when the middle die plate and the lower die plate are closed is further arranged between the middle die assembly and the lower die assembly.
Furthermore, the upper die plate is provided with upper mounting holes which are in one-to-one correspondence with the upper die cores;
the upper die core is arranged in the corresponding upper mounting hole and is provided with an upper abutting part which is used for abutting against the lower end part of the upper die plate;
and an upper clamp spring which is used for abutting against the upper end part of the upper template is further arranged on the upper die core, so that the upper die core is connected into the upper mounting hole through the upper abutting part and the upper clamp spring.
Further provides a concrete scheme of the middle mold core assembly, the middle mold plate is provided with middle mounting holes which are in one-to-one correspondence with the middle mold core assembly, the middle mold core assembly comprises an outer mold core and an inner mold core, wherein,
the outer mold core is arranged in the corresponding middle mounting hole and is provided with a middle abutting part which is used for abutting against the lower end part of the middle template;
the outer mold core is also provided with a middle snap spring which is used for abutting against the upper end part of the middle template, so that the middle abutting part and the middle snap spring can connect the outer mold core in the middle mounting hole;
the inner mold core is fixedly connected to the outer mold core and matched with the outer mold core to form the middle mold cavity;
the feeding cavity and the feeding hole are arranged on the outer mold core, and the upper spiral forming part is arranged on the inner mold core.
There is further provided a specific aspect of the first anti-rotation mechanism, including:
at least one first limiting groove arranged in the middle mounting hole;
the first limiting pins are arranged on the outer mold core and correspond to the first limiting grooves one to one, and the first limiting pins extend into the corresponding first limiting grooves to prevent the outer mold core from rotating in the middle mounting hole.
Further provides a specific scheme of the lower die core assembly, the lower die plate is provided with lower mounting holes which are in one-to-one correspondence with the lower die core assembly, the lower die core assembly comprises a lower die core and a sliding die core assembly, wherein,
the lower die cores are arranged in the corresponding lower mounting holes and are provided with lower abutting parts which are used for abutting against the upper end parts of the lower die plates;
the lower die core is also provided with a lower snap spring which is used for abutting against the lower end part of the lower template, so that the lower abutting part and the lower snap spring can connect the lower die core in the lower mounting hole;
the sliding mold core component is connected to the lower mold core in a sliding manner and is matched with the lower mold core to form the lower mold cavity;
the positioning part is arranged on the sliding mold core component;
and a third prevention and rotation mechanism for preventing the sliding mold core assembly from rotating relative to the lower mold core is arranged between the sliding mold core assembly and the lower mold core.
Further provided is a specific aspect of the second anti-rotation mechanism, including:
at least one second limiting groove arranged in the lower mounting hole;
and the second limiting pins are arranged on the lower die core and correspond to the second limiting grooves one to one, and the second limiting pins extend into the corresponding second limiting grooves to prevent the lower die core from rotating in the lower mounting hole.
Further provides a concrete scheme of the third prevention and rotation mechanism, and the third prevention and rotation mechanism comprises:
at least one third limiting groove arranged on the lower die core;
and the third limiting pins are arranged on the sliding mold core component and correspond to the third limiting grooves one to one, and the third limiting pins are matched in the corresponding third limiting grooves in a sliding mode to prevent the sliding mold core component from rotating relative to the lower mold core.
Further provides a concrete proposal of the sliding mold core component, a sliding hole is arranged in the lower mold core, the sliding mold core component comprises a sliding mold core and a base, wherein,
a limiting part is arranged in the sliding matching hole;
the sliding mold core is connected in the sliding hole in a sliding manner, and is provided with a sliding abutting part which is used for abutting against the limiting part to limit the sliding mold core to continuously slide downwards when the sliding mold core slides to the lowest end;
the base is connected to the lower end part of the sliding mold core and is used for abutting against the limiting part to limit the sliding mold core to continuously slide upwards when the sliding mold core slides to the uppermost end;
the positioning part is arranged at the upper end part of the sliding mold core.
Further provided is a specific aspect of the positioning device, including:
the positioning pin is eccentrically connected to the middle die core assembly;
the positioning sleeve is eccentrically connected with the lower die core assembly;
when the middle template and the lower template are assembled, the positioning pin extends into the positioning sleeve to fix the circumferential position of the middle template assembly relative to the lower template assembly.
Further, the injection type polytetrafluoroethylene oil seal die also comprises at least two first guide mechanisms arranged between the upper die plate and the middle die plate and at least two second guide mechanisms arranged between the middle die plate and the lower die plate, wherein,
the first guide mechanism comprises a first guide sleeve fixedly connected to the middle template and a first guide column fixedly connected to the upper template, and when the upper template and the middle template are matched, the first guide column extends into the first guide sleeve to guide the upper template and the middle template to be matched;
the second guide mechanism comprises a second guide sleeve fixedly connected to the middle template and a second guide column fixedly connected to the lower template, and when the middle template and the lower template are matched, the second guide column extends into the second guide sleeve to guide the middle template and the lower template to be matched.
After the technical scheme is adopted, a framework is sleeved on the positioning part, a lip sheet is placed on the positioning part, the lip sheet is partially positioned on the lower spiral forming part, then the middle template and the lower template are assembled, the upper end part of the lower die core assembly extends into the middle die cavity, the upper spiral forming part extends into the lower die cavity and presses the lip sheet part on the lower spiral forming part, and the middle die core assembly and the lower die core assembly are surrounded to form a forming die cavity; then, placing a sizing material into the feeding cavity, closing the upper die plate and the middle die plate, enabling the feeding bulge to extend into the feeding cavity and press the sizing material, melting the sizing material and pressing the sizing material into a forming die cavity from a feeding hole under the action of an external heater, and forming an upper spiral oil return groove and a lower spiral oil return groove by the lip under the action of an upper spiral forming part and a lower spiral forming part; and then the upper template, the middle template and the lower template are separated, and the sliding mold core assembly is jacked up so as to take down the polytetrafluoroethylene oil seal.
The first limiting pin extends into the first limiting groove to prevent the outer mold core from rotating in the middle mounting hole, so that the upper spiral forming part is prevented from rotating relative to the middle mold plate; the second limiting pin extends into the second limiting groove to prevent the lower mold core from rotating in the lower mounting hole, and the third limiting pin is in sliding fit in the third limiting groove to prevent the sliding mold core assembly from rotating relative to the lower mold core, so that a lower spiral forming part on the sliding mold core assembly is prevented from rotating relative to the lower mold plate, and the circumferential position of the upper spiral forming part relative to the lower spiral forming part is roughly positioned; the eccentric positioning pin stretches into in the positioning sleeve with accurate positioning go up the spiral forming part relative the circumferential position of spiral forming part down, and then accurate control last spiral oil return groove on the lip and the relative position between the spiral oil return groove down have improved the shaping precision of last spiral oil return groove and spiral oil return groove down, have improved the qualification rate and the quality of product to the low in manufacturing cost of this mould, easy operation.
Drawings
FIG. 1 is a schematic structural view of an injection type PTFE oil seal mold of the present invention;
FIG. 2 is a schematic structural view of the injection type PTFE oil seal mold of the present invention in a mold-splitting state;
FIG. 3 is a schematic view of a partial structure of the injection type PTFE oil seal mold of the present invention;
fig. 4 is a top view of fig. 2.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1 to 4, an injection type teflon oil seal mold, the teflon oil seal mold comprises a skeleton 1 and a lip 2, the upper surface of the lip 2 has an upper spiral oil return groove, the lower surface of the lip 2 has a lower spiral oil return groove, and the injection type teflon oil seal mold comprises an upper template 3, a middle template 4 and a lower template 5 which are sequentially arranged from top to bottom, wherein,
at least one upper mold core 6 is arranged on the upper mold plate 3, and a feeding bulge 7 is arranged at the lower end part of the upper mold core 6;
the middle template 4 is provided with middle template components which are in one-to-one correspondence with the upper templates 6, and the upper end part of the middle template component is provided with a feeding cavity 8 matched with the feeding bulge 7;
the lower end part of the middle die assembly is provided with a middle die cavity 9, and the middle die assembly is also provided with an upper spiral forming part 10 for forming the upper spiral oil return groove and at least one feeding hole 11 for communicating the feeding cavity 8 with the middle die cavity 9;
a first anti-rotation mechanism for preventing the middle die core assembly from rotating relative to the middle die plate 4 is arranged between the middle die core assembly and the middle die plate 4;
the lower template 5 is provided with lower die core assemblies which correspond to the middle die core assemblies one by one, the lower die core assemblies are provided with lower die cavities 12 and positioning parts 13 positioned in the lower die cavities 12, and the positioning parts 13 are used for sleeving the framework 1 and supporting the lip piece 2 so as to fix the positions of the framework 1 and the lip piece 2;
a lower spiral forming part 14 for forming the lower spiral oil return groove is arranged on the positioning part 13, and the lip piece 2 is partially positioned on the lower spiral forming part 14;
a second anti-rotation mechanism for preventing the lower die core assembly from rotating relative to the lower template 5 is arranged between the lower die core assembly and the lower template 5;
when the upper template 3, the middle template 4 and the lower template 5 are matched, the feeding protrusion 7 extends into the feeding cavity 8, the upper end of the lower die core assembly extends into the middle die cavity 9, the upper spiral forming part 10 extends into the lower die cavity 12 and presses the part of the lip 2 on the lower spiral forming part 14, the middle die core assembly and the lower die core assembly surround to form a forming die cavity 15 which is used for forming the polytetrafluoroethylene oil seal and is communicated with the feeding hole 11, specifically, the framework 1 and the lip 2 are both positioned in the forming die cavity 15, the feeding cavity 8 is of an annular structure, and the lip 2 is made of polytetrafluoroethylene material;
and a positioning device 100 used for fixing the circumferential position of the middle die assembly relative to the lower die assembly when the middle template 4 and the lower template 5 are assembled is further arranged between the middle die assembly and the lower die assembly.
In the present embodiment, the upper spiral forming part 10 and the lower spiral forming part 14 each include a right-handed planar spiral groove from outside to inside; specifically, the framework 1 is sleeved on the positioning portion 13, the lip piece 2 is placed on the positioning portion, the middle template 4 and the lower template 5 are matched, glue is placed in the feeding cavity 8, the upper template 3 and the middle template 4 are matched, the feeding protrusion 7 extends into the feeding cavity 8 and presses the glue, the glue is melted under the action of an external heater and is pressed into the molding cavity 15 from the feeding hole 11, and the lip piece 2 forms the upper spiral oil return groove and the lower spiral oil return groove under the action of the upper spiral molding portion 10 and the lower spiral molding portion 14; after the polytetrafluoroethylene oil seal is formed, the upper template 3, the middle template 4 and the lower template 5 are separated, and the sliding mold core assembly is jacked up so as to take down the polytetrafluoroethylene oil seal.
As shown in fig. 1 and 2, the upper die plate 3 is provided with upper mounting holes corresponding to the upper die cores 6 one to one;
the upper die core 6 is arranged in the corresponding upper mounting hole and is provided with an upper abutting part 16 which is used for abutting against the lower end part of the upper die plate 3;
and an upper clamp spring 17 which is used for abutting against the upper end part of the upper template 3 is further arranged on the upper die core 6, so that the upper abutting part 16 and the upper clamp spring 17 connect the upper die core 6 in the upper mounting hole.
As shown in fig. 1 and 2, the middle mold plate 4 is provided with a middle mounting hole corresponding to the middle mold core assembly one to one, and the middle mold core assembly includes, for example and without limitation, an outer mold core 18 and an inner mold core 19, wherein,
the outer mold core 18 is arranged in the corresponding middle mounting hole and is provided with a middle abutting part 20 which is used for abutting against the lower end part of the middle template 4;
the outer mold core 18 is also provided with a middle snap spring 21 which is used for abutting against the upper end part of the middle template 4, so that the middle abutting part 20 and the middle snap spring 21 can connect the outer mold core 18 in the middle mounting hole;
the inner mold core 19 is fixedly connected to the outer mold core 18 and is matched with the outer mold core 18 to form the middle mold cavity 9;
the feeding cavity 8 and the feeding hole 11 are both arranged on the outer mold core 18, and the upper spiral forming part 10 is arranged on the inner mold core 19. In this embodiment, the inner mold core 19 is tightly fitted and connected to the outer mold core 18 and is fixedly connected to the outer mold core 18 through a connecting bolt, the interference magnitude between the inner mold core 19 and the outer mold core 18 is 0.01-0.02 mm, and the outer mold core 18 is in clearance fit in the corresponding middle mounting hole.
As shown in fig. 1 and 2, the first anti-rotation mechanism includes, for example but not limited to, the following structures:
at least one first limiting groove 22 arranged in the middle mounting hole;
the first limiting pins 23 are mounted on the outer mold core 18 and correspond to the first limiting grooves 22 one by one, and the first limiting pins 23 extend into the corresponding first limiting grooves 22 to prevent the outer mold core 18 from rotating in the middle mounting hole; in this embodiment, the first limiting grooves 22 are provided in two and are longitudinally formed on the inner wall of the middle mounting hole.
As shown in fig. 1 and 2, the lower mold plate 5 is provided with lower mounting holes corresponding to the lower mold core assemblies one to one, such as, but not limited to, a structure including a lower mold core 24 and a sliding mold core assembly, wherein,
the lower mold cores 24 are arranged in the corresponding lower mounting holes and are provided with lower abutting parts 25 which are used for abutting against the upper end parts of the lower template 5;
the lower mold core 24 is also provided with a lower clamp spring 26 which is used for abutting against the lower end part of the lower template 5, so that the lower mold core 24 is connected into the lower mounting hole through the lower abutting part 25 and the lower clamp spring 26;
the sliding mold core assembly is slidably connected to the lower mold core 24 and is matched with the lower mold core 24 to form the lower mold cavity 12;
the positioning part 13 is arranged on the sliding mold core component;
and a third prevention and rotation mechanism for preventing the sliding mold core assembly from rotating relative to the lower mold core 24 is arranged between the sliding mold core assembly and the lower mold core 24.
As shown in fig. 1 and 2, the second anti-rotation mechanism includes, for example but not limited to, the following structures:
at least one second limiting groove 27 arranged in the lower mounting hole;
second limiting pins 28 which are installed on the lower mold core 24 and correspond to the second limiting grooves 27 one to one, wherein the second limiting pins 28 extend into the corresponding second limiting grooves 27 to prevent the lower mold core 24 from rotating in the lower installation hole; in this embodiment, the two second limiting grooves 27 are longitudinally formed on the inner wall of the lower mounting hole.
As shown in fig. 1 and 2, the third rotation prevention mechanism includes, for example but not limited to, the following structures:
at least one third limiting groove 29 arranged on the lower mold core 24;
third limiting pins 30 which are arranged on the sliding mold core assembly and correspond to the third limiting grooves 29 one by one, wherein the third limiting pins 30 are matched in the corresponding third limiting grooves 29 in a sliding manner so as to prevent the sliding mold core assembly from rotating relative to the lower mold core 24; in this embodiment, two third limiting grooves 29 are provided and are longitudinally provided on the lower mold core 24.
As shown in fig. 1 and 2, the lower mold core 24 is provided with a sliding fit hole therein, and the sliding mold core assembly is, for example and without limitation, a structure comprising a sliding mold core 31 and a base 32, wherein,
a limiting part 33 is arranged in the sliding matching hole;
the sliding mold core 31 is slidably connected in the sliding hole and is provided with a sliding abutting part 34 which is used for abutting against the limiting part 33 to limit the sliding mold core 31 to continuously slide downwards when the sliding mold core 31 slides to the lowest end;
the base 32 is connected to the lower end of the sliding mold core 31 and is used for abutting against the limiting part 33 to limit the sliding mold core 31 to continuously slide upwards when the sliding mold core 31 slides to the uppermost end;
the positioning part 13 is arranged at the upper end part of the sliding mold core 31; in this embodiment, the third limiting groove 29 is longitudinally disposed in the sliding hole, the third limiting pin 30 is connected to the base 32, and the base 32 is connected to the sliding mold core 31 through a fixing bolt.
As shown in fig. 1, 2 and 4, the positioning device 100 includes, for example but not limited to, the following structures:
a positioning pin 35 eccentrically connected to the middle die assembly;
a positioning sleeve 36 eccentrically connected to the lower die core assembly;
when the middle template 4 and the lower template 5 are matched, the positioning pin 35 extends into the positioning sleeve 36 to fix the circumferential position of the middle template assembly relative to the lower template assembly; specifically, the center axis of the positioning pin 35 is offset from the center axis of the middle die assembly, and the center axis of the positioning sleeve 36 is offset from the center axis of the lower die assembly; in this embodiment, the sliding mold core assembly further comprises a top seat 37 tightly connected to the upper end of the sliding mold core 31, the positioning sleeve 36 is tightly connected to the top seat 37, and the positioning pin 35 is tightly connected to the inner mold core 19.
As shown in fig. 1, the injection type ptfe oil seal mold further includes at least two first guide mechanisms disposed between the upper mold plate 3 and the middle mold plate 4, and at least two second guide mechanisms disposed between the middle mold plate 4 and the lower mold plate 5, wherein,
the first guide mechanism comprises a first guide sleeve 38 fixedly connected to the middle template 4 and a first guide column 39 fixedly connected to the upper template 3, and when the upper template 3 and the middle template 4 are matched, the first guide column 39 extends into the first guide sleeve 38 to guide the upper template 3 and the middle template 4 to be matched;
the second guide mechanism comprises a second guide sleeve 40 fixedly connected to the middle template 4 and second guide posts 41 fixedly connected to the lower template 5, and when the middle template 4 and the lower template 5 are matched, the second guide posts 41 extend into the second guide sleeve 40 to guide the middle template 4 and the lower template 5 to be matched, in this embodiment, 3 guide mechanisms are arranged.
The working principle of the utility model is as follows:
sleeving a framework 1 on the positioning part 13 and placing a lip 2, wherein part of the lip 2 is positioned on the lower spiral forming part 14, then closing the middle template 4 and the lower template 5, the upper end part of the lower die core assembly extends into the middle die cavity 9, the upper spiral forming part 10 extends into the lower die cavity 12 and presses the part of the lip 2 on the lower spiral forming part 14, and the middle die core assembly and the lower die core assembly surround to form a forming die cavity 15; then, glue is put into the feeding cavity 8, the upper template 3 and the middle template 4 are matched, the feeding bulge 7 extends into the feeding cavity 8 and presses the glue, the glue is melted and pressed into the molding die cavity 15 from the feeding hole 11 under the action of an external heater, and the lip 2 forms an upper spiral oil return groove and a lower spiral oil return groove under the action of the upper spiral molding part 10 and the lower spiral molding part 14; and then the upper template 3, the middle template 4 and the lower template 5 are separated, and the sliding mold core assembly is jacked up so as to take down the polytetrafluoroethylene oil seal.
Wherein the first limit pin 23 extends into the first limit groove 22 to prevent the outer mold core 18 from rotating in the middle mounting hole, so as to prevent the upper spiral forming part 10 from rotating relative to the middle mold plate 4; the second limit pin 28 extends into the second limit groove 27 to prevent the lower mold core 24 from rotating in the lower mounting hole, and the third limit pin 30 is slidably fitted in the third limit groove 29 to prevent the sliding core assembly from rotating relative to the lower mold core 24, so as to prevent the lower spiral forming part 14 on the sliding core assembly from rotating relative to the lower mold plate 5, and thus, to roughly position the circumferential position of the upper spiral forming part 10 relative to the lower spiral forming part 14; the locating pin 35 of eccentric setting stretches into with the accurate positioning in the position sleeve 36 go up spiral shaping portion 10 relative the circumference position of spiral shaping portion 14 down, and then accurate control last spiral oil return groove on the lip 2 and the relative position between the spiral oil return groove down have improved the shaping precision of last spiral oil return groove and spiral oil return groove down, have improved the qualification rate and the quality of product to the low in manufacturing cost of this mould, easy operation.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (10)
1. An injection type polytetrafluoroethylene oil seal die, the polytetrafluoroethylene oil seal comprises a framework (1) and a lip (2), the upper surface of the lip (2) is provided with an upper spiral oil return groove, the lower surface of the lip (2) is provided with a lower spiral oil return groove, the injection type polytetrafluoroethylene oil seal die is characterized by comprising an upper die plate (3), a middle die plate (4) and a lower die plate (5) which are sequentially arranged from top to bottom, wherein,
at least one upper mold core (6) is arranged on the upper mold plate (3), and a feeding bulge (7) is arranged at the lower end part of the upper mold core (6);
the middle die plate (4) is provided with middle die components which correspond to the upper die cores (6) one by one, and the upper end part of the middle die component is provided with a feeding cavity (8) matched with the feeding bulge (7);
the lower end part of the middle die assembly is provided with a middle die cavity (9), and the middle die assembly is also provided with an upper spiral forming part (10) for forming the upper spiral oil return groove and at least one feeding hole (11) for communicating the feeding cavity (8) with the middle die cavity (9);
a first anti-rotation mechanism for preventing the middle die core assembly from rotating relative to the middle die plate (4) is arranged between the middle die core assembly and the middle die plate (4);
the lower die plate (5) is provided with lower die assemblies which correspond to the middle die assemblies one by one, the lower die assemblies are provided with lower die cavities (12) and positioning parts (13) positioned in the lower die cavities (12), and the positioning parts (13) are used for sleeving the framework (1) and supporting the lip sheets (2) so as to fix the positions of the framework (1) and the lip sheets (2);
a lower spiral forming part (14) used for forming the lower spiral oil return groove is arranged on the positioning part (13), and the lip piece (2) is partially positioned on the lower spiral forming part (14);
a second anti-rotation mechanism for preventing the lower die core assembly from rotating relative to the lower template (5) is arranged between the lower die core assembly and the lower template (5);
when the upper template (3), the middle template (4) and the lower template (5) are matched, the feeding protrusion (7) extends into the feeding cavity (8), the upper end part of the lower die core assembly extends into the middle die cavity (9), the upper spiral forming part (10) extends into the lower die cavity (12) and presses the lip sheet (2) on the lower spiral forming part (14), and the middle die core assembly and the lower die core assembly surround to form a forming die cavity (15) which is used for forming the polytetrafluoroethylene oil seal and is communicated with the feeding hole (11);
and a positioning device (100) used for fixing the circumferential position of the middle die assembly relative to the lower die assembly when the middle template (4) and the lower template (5) are assembled is further arranged between the middle die assembly and the lower die assembly.
2. The injected polytetrafluoroethylene oil seal mold according to claim 1,
the upper template (3) is provided with upper mounting holes which are in one-to-one correspondence with the upper mold cores (6);
the upper mold core (6) is arranged in the corresponding upper mounting hole and is provided with an upper abutting part (16) which is abutted against the lower end part of the upper template (3);
and an upper clamp spring (17) which is used for abutting against the upper end part of the upper template (3) is further arranged on the upper mold core (6), so that the upper abutting part (16) and the upper clamp spring (17) connect the upper mold core (6) in the upper mounting hole.
3. The oil-sealed injected polytetrafluoroethylene mold according to claim 1, wherein said middle mold plate (4) is provided with a middle mounting hole corresponding to said middle mold core assembly in a one-to-one correspondence, said middle mold core assembly comprising an outer mold core (18) and an inner mold core (19),
the outer mold cores (18) are arranged in the corresponding middle mounting holes and are provided with middle abutting parts (20) which are used for abutting against the lower end parts of the middle mold plates (4);
the outer mold core (18) is also provided with a middle snap spring (21) which is used for abutting against the upper end part of the middle template (4), so that the middle abutting part (20) and the middle snap spring (21) can connect the outer mold core (18) in the middle mounting hole;
the inner mold core (19) is fixedly connected to the outer mold core (18) and is matched with the outer mold core (18) to form the middle mold cavity (9);
the feeding cavity (8) and the feeding hole (11) are arranged on the outer mold core (18), and the upper spiral forming part (10) is arranged on the inner mold core (19).
4. The injected polytetrafluoroethylene oil seal mold according to claim 3, wherein said first anti-rotation mechanism comprises:
at least one first limiting groove (22) arranged in the middle mounting hole;
the first limiting pins (23) are mounted on the outer mold core (18) and correspond to the first limiting grooves (22) one to one, and the first limiting pins (23) extend into the corresponding first limiting grooves (22) to prevent the outer mold core (18) from rotating in the middle mounting hole.
5. The oil seal mold for injection type PTFE according to claim 1, wherein the lower mold plate (5) is provided with lower mounting holes corresponding to the lower mold core assembly one by one, the lower mold core assembly comprises a lower mold core (24) and a sliding mold core assembly, wherein,
the lower mold cores (24) are arranged in the corresponding lower mounting holes and are provided with lower abutting parts (25) which are used for abutting against the upper end parts of the lower template (5);
the lower mold core (24) is also provided with a lower clamp spring (26) which is used for abutting against the lower end part of the lower template (5), so that the lower mold core (24) is connected into the lower mounting hole by the lower abutting part (25) and the lower clamp spring (26);
the sliding mold core component is connected to the lower mold core (24) in a sliding mode and is matched with the lower mold core (24) to form the lower mold cavity (12);
the positioning part (13) is arranged on the sliding mold core component;
and a third prevention and rotation mechanism for preventing the sliding mold core assembly from rotating relative to the lower mold core (24) is arranged between the sliding mold core assembly and the lower mold core (24).
6. The injected polytetrafluoroethylene oil seal mold according to claim 5, wherein the second anti-rotation mechanism comprises:
at least one second limiting groove (27) arranged in the lower mounting hole;
and the second limiting pins (28) are arranged on the lower mold core (24) and correspond to the second limiting grooves (27) one to one, and the second limiting pins (28) extend into the corresponding second limiting grooves (27) to prevent the lower mold core (24) from rotating in the lower mounting hole.
7. The injected polytetrafluoroethylene oil seal mold according to claim 5, wherein the third prevention rotation mechanism comprises:
at least one third limiting groove (29) arranged on the lower mold core (24);
and third limiting pins (30) which are arranged on the sliding mold core component and correspond to the third limiting grooves (29) one by one, wherein the third limiting pins (30) are matched in the corresponding third limiting grooves (29) in a sliding manner so as to prevent the sliding mold core component from rotating relative to the lower mold core (24).
8. The injected polytetrafluoroethylene oil seal mold according to claim 5, wherein said lower mold core (24) is provided with a slide-fit hole therein, and said slide mold core assembly comprises a slide mold core (31) and a base (32),
a limiting part (33) is arranged in the sliding hole;
the sliding mold core (31) is connected in the sliding hole in a sliding manner, and is provided with a sliding abutting part (34) which is used for abutting against the limiting part (33) to limit the sliding mold core (31) to continuously slide downwards when the sliding mold core (31) slides to the lowest end;
the base (32) is connected to the lower end part of the sliding mold core (31) and is used for abutting against the limiting part (33) to limit the sliding mold core (31) to continuously slide upwards when the sliding mold core (31) slides to the uppermost end;
the positioning part (13) is arranged at the upper end part of the sliding mold core (31).
9. The injected polytetrafluoroethylene oil seal mold according to claim 1, wherein said positioning device (100) comprises:
a positioning pin (35) eccentrically connected to the middle die assembly;
a positioning sleeve (36) eccentrically connected to the lower die core assembly;
when the middle template (4) and the lower template (5) are matched, the positioning pin (35) extends into the positioning sleeve (36) to fix the circumferential position of the middle template assembly relative to the lower template assembly.
10. The injected polytetrafluoroethylene oil seal mold according to claim 1, further comprising at least two first guide mechanisms disposed between said upper mold plate (3) and middle mold plate (4) and at least two second guide mechanisms disposed between said middle mold plate (4) and lower mold plate (5), wherein,
the first guide mechanism comprises a first guide sleeve (38) fixedly connected to the middle template (4) and a first guide column (39) fixedly connected to the upper template (3), and when the upper template (3) and the middle template (4) are matched, the first guide column (39) extends into the first guide sleeve (38) to guide the upper template (3) and the middle template (4) to be matched;
the second guide mechanism comprises a second guide sleeve (40) fixedly connected to the middle template (4) and a second guide column (41) fixedly connected to the lower template (5), and when the middle template (4) and the lower template (5) are matched, the second guide column (41) extends into the second guide sleeve (40) to guide the middle template (4) and the lower template (5) to be matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921424378.9U CN210791779U (en) | 2019-08-29 | 2019-08-29 | Injection type polytetrafluoroethylene oil seal mould |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921424378.9U CN210791779U (en) | 2019-08-29 | 2019-08-29 | Injection type polytetrafluoroethylene oil seal mould |
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| Publication Number | Publication Date |
|---|---|
| CN210791779U true CN210791779U (en) | 2020-06-19 |
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| CN201921424378.9U Active CN210791779U (en) | 2019-08-29 | 2019-08-29 | Injection type polytetrafluoroethylene oil seal mould |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580500A (en) * | 2021-08-02 | 2021-11-02 | 苏州弗莱依格密封科技有限公司 | Rubber seal ring die and forming method thereof |
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2019
- 2019-08-29 CN CN201921424378.9U patent/CN210791779U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580500A (en) * | 2021-08-02 | 2021-11-02 | 苏州弗莱依格密封科技有限公司 | Rubber seal ring die and forming method thereof |
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Address after: No. 251, Yanqiao, nanlanling village, Menghe Town, Xinbei District, Changzhou City, Jiangsu Province, 213000 Patentee after: CHANGZHOU DOMT SEALING TECHNOLOGY Co.,Ltd. Address before: 213000 new countryside north of five star street, bell tower area, Jiangsu, Changzhou Patentee before: CHANGZHOU DOMT SEALING TECHNOLOGY Co.,Ltd. |
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