CN210791759U - Polytetrafluoroethylene oil seal mould - Google Patents
Polytetrafluoroethylene oil seal mould Download PDFInfo
- Publication number
- CN210791759U CN210791759U CN201921815751.3U CN201921815751U CN210791759U CN 210791759 U CN210791759 U CN 210791759U CN 201921815751 U CN201921815751 U CN 201921815751U CN 210791759 U CN210791759 U CN 210791759U
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- die
- mold
- positioning
- mold core
- oil seal
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 48
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 48
- -1 Polytetrafluoroethylene Polymers 0.000 title claims abstract description 47
- 238000007493 shaping process Methods 0.000 claims abstract description 14
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012797 qualification Methods 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model discloses a polytetrafluoroethylene oil seal mould, which comprises a skeleton and a lip piece formed by cutting off a lip piece shaping piece, and comprises an upper mould, a lower mould and a mould core, wherein the lower end part of the upper mould is provided with an upper mould bulge; the mold core is connected in the lower mold in a sliding manner, the mold core is provided with an ejection station and a molding station in the sliding process, and the mold core positioned on the molding station is matched with the lower mold to form a lower mold cavity; the upper end part of the mold core is provided with an assembling part for assembling and positioning the lip piece shaping piece and a bearing part for placing the framework; when the upper die and the lower die are closed, the upper die, the lower die and the die core surround to form a forming cavity for forming the polytetrafluoroethylene oil seal. The utility model discloses can pinpoint the position of skeleton and lip piece profile modeling piece in the mould improves the production qualification rate that polytetrafluoroethylene oil sealed, and then improves the output and the sealing performance of polytetrafluoroethylene oil seal.
Description
Technical Field
The utility model relates to a polytetrafluoroethylene oil blanket mould.
Background
At present, polytetrafluoroethylene oil blanket is the very extensive a kind of oil blanket of sealed field application, contains skeleton and lip in the polytetrafluoroethylene oil blanket, the material of lip is polytetrafluoroethylene, the lip is formed through excision lip design spare, lip design spare is stereotyped by flat lip blank and is bent and form, will through the sizing material skeleton and lip parcel are in order to form the oil blanket, reach good sealed effect. However, when the existing polytetrafluoroethylene oil seal mold is used for producing the polytetrafluoroethylene oil seal, the positions of the framework and the lip piece positioning piece in the mold cannot be accurately positioned, so that the produced polytetrafluoroethylene oil seal cannot meet the design requirements, the defective rate is high, the yield is seriously influenced, and the sealing performance and the sealing effect of the polytetrafluoroethylene oil seal are also influenced.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide a polytetrafluoroethylene oil blanket mould, it can pinpoint the position of skeleton and lip piece profile modeling piece in the mould improves the production qualification rate of polytetrafluoroethylene oil blanket, and then improves the output and the sealing performance of polytetrafluoroethylene oil blanket.
In order to solve the technical problem, the technical scheme of the utility model is that: a polytetrafluoroethylene oil seal mould, the polytetrafluoroethylene oil seal contains skeleton and lip slice formed by cutting lip slice shaping piece, it includes upper mould, lower mould and mould core, wherein,
an upper die bulge is arranged at the lower end part of the upper die;
the mold core is connected in the lower mold in a sliding manner, the mold core is provided with an ejection station and a molding station in the sliding process, and the mold core positioned on the molding station is matched with the lower mold to form a lower mold cavity;
the upper end part of the mold core is provided with an assembling part for assembling and positioning the lip shaping piece and a bearing part for placing the framework, and the lip shaping piece assembled on the assembling part and the framework positioned on the bearing part are both positioned in the lower mold cavity;
when the upper die and the lower die are assembled, the upper die bulge extends into the framework on the bearing part and is matched with the inner peripheral wall of the framework to position the framework, and the upper die, the lower die and the die core surround to form a forming cavity for forming the polytetrafluoroethylene oil seal.
Further, there is provided a concrete structure of the fitting part, the lip shape includes a horizontal lip and an inclined lip, an upper end of the inclined lip is connected with an outer side end of the horizontal lip;
the fitting portion includes a support portion for abutting engagement with the horizontal lip portion and a positioning portion for abutting engagement with the inclined lip portion.
Further in order to align the framework, the lower end part of the upper die protrusion is provided with a guide part for guiding the upper die protrusion to extend into the framework so as to position the framework.
Further, on the axial section of the upper die, an included angle C between the guide part and the vertical direction is 5-35 degrees.
Furthermore, a coarse positioning mechanism for coarsely positioning the position of the mold core relative to the upper mold is arranged between the upper mold and the mold core; wherein, thick positioning mechanism includes:
the positioning column is arranged at the upper end part of the mold core;
the positioning hole is arranged in the upper die and used for extending into the positioning column;
the guiding pyramid part is arranged at the upper end part of the positioning column and used for guiding the positioning column to extend into the positioning hole.
Further, go up to be equipped with between mould and the lower mould and be used for the smart location go up the mould relative the smart positioning mechanism of the position of lower mould, smart positioning mechanism includes:
the positioning cone part is arranged on the lower die;
and when the upper die and the lower die are closed, the positioning taper part is matched with the matching taper part to accurately position the position of the upper die relative to the lower die.
Further, a mold core hole for sliding and matching the mold core is formed in the lower mold;
and a limiting mechanism used for limiting the sliding stroke of the mold core is arranged between the mold core and the lower mold.
Further provides a specific scheme of the limiting mechanism, and the limiting mechanism comprises:
the limiting bulge is arranged in the die core hole;
the limiting step is arranged on the mold core and is abutted against the upper end part of the limiting bulge to limit the mold core to continuously slide downwards when the mold core slides to a forming station;
and the clamp spring is arranged at the lower end part of the mold core and is used for abutting against the lower end part of the limiting bulge to limit the mold core to continuously slide upwards when the mold core slides to an ejection station.
Furthermore, a positioning conical surface with a large upper part and a small lower part is arranged in the die core hole;
and the mold core is provided with a matching conical surface matched with the positioning conical surface, so that when the mold core slides to the forming station, the matching conical surface is matched with the positioning conical surface to position the mold core relative to the lower mold.
After the technical scheme is adopted, firstly, a framework is placed on the bearing part, the lip piece positioning piece is assembled on the assembling part, and the positioning column is sleeved with an annular rubber raw material; then the upper die and the lower die are closed, the upper die bulge extends into the framework on the bearing part and is matched with the inner peripheral wall of the framework to position the framework, the upper die presses the annular rubber raw material on the die core, the annular rubber raw material is melted under the action of external heating, and the raw material flows into the forming cavity and is formed into the polytetrafluoroethylene oil seal; and then the upper die and the lower die are separated, and the die core is jacked upwards to a jacking station so as to be convenient for taking down the polytetrafluoroethylene oil seal. Through assembly portion location the lip piece is decided the type piece, through go up the protruding location of mould the skeleton has improved the positioning accuracy of skeleton and lip piece are decided the type piece in the mould, and then has improved the production qualification rate that the polytetrafluoroethylene oil sealed, has improved the output and the sealing performance that the polytetrafluoroethylene oil sealed.
Drawings
FIG. 1 is a schematic structural diagram of the clamping state of the PTFE oil seal mold of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic structural diagram of the polytetrafluoroethylene oil seal mold in a mold-splitting state according to the present invention;
FIG. 4 is a schematic structural diagram of a mold core of the polytetrafluoroethylene oil seal mold located at a jacking station.
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 figures 1-4, a polytetrafluoroethylene oil seal mold, the polytetrafluoroethylene oil seal contains a skeleton 1 and a lip piece formed by cutting off a lip piece shaping piece 2, and comprises an upper mold 3, a lower mold 4 and a mold core 5, wherein,
an upper die bulge 7 is arranged at the lower end part of the upper die 3;
the mold core 5 is connected in the lower mold 4 in a sliding manner, the mold core 5 is provided with an ejection station and a molding station in the sliding process, and the mold core 5 positioned on the molding station is matched with the lower mold 4 to form a lower mold cavity 8;
the upper end part of the mold core 5 is provided with an assembling part 9 for assembling and positioning the lip shaping piece 2 and a bearing part 10 for placing the framework 1, and the lip shaping piece 2 assembled on the assembling part 9 and the framework 1 positioned on the bearing part 10 are both positioned in the lower mold cavity 8;
when the upper die 3 and the lower die 4 are closed, the upper die bulge 7 extends into the framework 1 on the bearing part 10 and is matched with the inner peripheral wall of the framework 1 to position the framework 1, and the upper die 3, the lower die 4 and the die core 5 surround to form a forming cavity 11 for forming the polytetrafluoroethylene oil seal; specifically, during the compound die skeleton 1 and lip decide type piece 2 all are located in the die cavity 11, skeleton 1 and lip decide type piece 2 are the loop configuration, the material of lip decide type piece 2 is polytetrafluoroethylene.
As shown in fig. 1, 2 and 4, the lip shape 2 may include a horizontal lip 12 and an inclined lip 13, an upper end of the inclined lip 13 being connected to an outer end of the horizontal lip 12;
the fitting part 9 may comprise a support part 14 for an abutting engagement with the horizontal lip part 12 and a positioning part 15 for an abutting engagement with the inclined lip part 13 in order to accurately position the position of the lip profile 2.
As shown in fig. 2 and 4, the lower end of the upper mold protrusion 7 may be provided with a guide portion 16 for guiding the upper mold protrusion 7 to extend into the framework 1 for positioning the upper and lower portions of the framework 1, the guide portion 16 is provided on the outer peripheral wall of the upper mold protrusion 7, the upper mold protrusion 7 extends into the framework 1, and then the outer peripheral wall of the upper mold protrusion 7 is matched with the inner peripheral wall of the framework 1 to precisely position the position of the framework 1.
As shown in fig. 4, on the axial cross section of the upper die 3, an included angle C between the guide portion 16 and the vertical direction may be 5 to 35 °; in this embodiment, the included angle C is 30 °.
As shown in fig. 1, 3 and 4, a coarse positioning mechanism for coarsely positioning the position of the mold core 5 relative to the upper mold 3 may be disposed between the upper mold 3 and the mold core 5, and the coarse positioning mechanism includes, but is not limited to, the following structures:
a positioning column 17 arranged at the upper end part of the mold core 5;
a positioning hole 18 which is arranged in the upper die 3 and used for extending into the positioning column 17;
a guide tapered part 19 which is provided at the upper end of the positioning post 17 and guides the positioning post 17 to extend into the positioning hole 18; specifically, the positioning column 17 is further used for sleeving an annular rubber raw material, and the annular rubber raw material sleeved on the positioning column 17 is further used for pressing the lip shaping piece 2 on the assembling part 9.
As shown in fig. 1, 3 and 4, a fine positioning mechanism for finely positioning the position of the upper die 3 relative to the lower die 4 is disposed between the upper die 3 and the lower die 4, and the fine positioning mechanism includes, but is not limited to, the following structures:
a positioning taper portion 20 provided on the lower die 4;
and a matching cone part 6 arranged on the upper die 3, wherein when the upper die 3 and the lower die 4 are matched, the positioning cone part 20 is matched with the matching cone part 6 to finely position the position of the upper die 3 relative to the lower die 4.
As shown in fig. 1, 3 and 4, a mold core hole 21 for slidably fitting the mold core 5 is formed in the lower mold 4;
and a limiting mechanism for limiting the sliding stroke of the mold core 5 is arranged between the mold core 5 and the lower mold 4.
As shown in fig. 1, 3 and 4, the limiting mechanism includes, for example but not limited to, the following structures:
a limiting bulge 22 arranged in the die core hole 21;
the limiting step 23 is arranged on the mold core 5 and is used for abutting against the upper end part of the limiting bulge 22 to limit the mold core 5 to continuously slide downwards when the mold core 5 slides to a forming station;
the clamp spring 24 is arranged at the lower end part of the mold core 5 and is used for abutting against the lower end part of the limiting bulge 22 to limit the mold core 5 to continuously slide upwards when the mold core 5 slides to an ejection station; specifically, the clamp spring 24 is clamped in a clamp spring groove on the mold core 5.
As shown in fig. 1 to 4, a positioning conical surface 25 with a large upper part and a small lower part can be arranged in the die core hole 21;
the mold core 5 is provided with a matching conical surface 26 matched with the positioning conical surface 25, so that when the mold core 5 slides to the molding station, the matching conical surface 26 is matched with the positioning conical surface 25 to position the mold core 5 relative to the lower mold 4, and specifically, the matching conical surface 26 is also beneficial to ejecting the mold core 5 out of the mold core hole 21, ejecting the mold core 5 out of the mold core hole 21 and taking down the polytetrafluoroethylene oil seal.
The working principle of the utility model is as follows:
firstly, placing a framework 1 on the bearing part 10, assembling the lip shaping piece 2 on the assembling part 9, and sleeving an annular rubber raw material on the positioning column 17; then the upper die 3 and the lower die 4 are matched, the upper die bulge 7 extends into the framework 1 on the bearing part 10 and is matched with the inner peripheral wall of the framework 1 to position the framework 1, the upper die 3 presses the annular rubber raw material on the die core 5, the annular rubber raw material is melted under the action of external heating, and the raw material flows into the forming cavity 11 and is formed into the polytetrafluoroethylene oil seal; then the upper die 3 and the lower die 4 are separated, and the die core 5 is jacked upwards to a jacking station so as to be convenient for taking down the polytetrafluoroethylene oil seal. Through assembly portion 9 location lip decide type piece 2, through go up the protruding 7 location of mould skeleton 1 has improved the positioning accuracy of skeleton 1 and lip decide type piece 2 in the mould, and then has improved the production qualification rate of polytetrafluoroethylene oil seal, has improved the output and the sealing performance of polytetrafluoroethylene oil seal.
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. A polytetrafluoroethylene oil seal mould, the polytetrafluoroethylene oil seal contains skeleton (1) and lip slice formed by cutting lip slice fixed shape piece (2), characterized by, it includes the upper die (3), lower die (4) and mold core (5), wherein,
an upper die bulge (7) is arranged at the lower end part of the upper die (3);
the mold core (5) is connected in the lower mold (4) in a sliding manner, the mold core (5) is provided with an ejection station and a molding station in the sliding process, and the mold core (5) positioned on the molding station is matched with the lower mold (4) to form a lower mold cavity (8);
the upper end part of the mold core (5) is provided with an assembling part (9) for assembling and positioning the lip shaping piece (2) and a bearing part (10) for placing the framework (1), and the lip shaping piece (2) assembled on the assembling part (9) and the framework (1) positioned on the bearing part (10) are both positioned in the lower mold cavity (8);
when going up mould (3) and lower mould (4) compound die, go up mould arch (7) and stretch into skeleton (1) on load-bearing part (10) and with the cooperation of the internal perisporium of skeleton (1) is in order to fix a position skeleton (1), go up mould (3), lower mould (4) and mold core (5) and surround and form and be used for the shaping polytetrafluoroethylene oil seal's shaping chamber (11).
2. The polytetrafluoroethylene oil seal mold according to claim 1,
the lip profile (2) comprises a horizontal lip (12) and an inclined lip (13), the upper end of the inclined lip (13) is connected with the outer side end of the horizontal lip (12);
the fitting portion (9) includes a support portion (14) for abutting engagement with the horizontal lip portion (12) and a positioning portion (15) for abutting engagement with the inclined lip portion (13).
3. The polytetrafluoroethylene oil seal mold according to claim 1, wherein the lower end of the upper mold projection (7) is provided with a guide (16) for guiding the upper mold projection (7) to protrude into the frame (1) to position the frame (1) in a large-upper-small-lower direction.
4. The polytetrafluoroethylene oil seal die according to claim 3, wherein, in the axial section of the upper die (3), the angle C between the guide portion (16) and the vertical direction is 5-35 °.
5. The polytetrafluoroethylene oil seal die according to claim 1, wherein a coarse positioning mechanism for coarsely positioning the position of the die core (5) relative to the upper die (3) is arranged between the upper die (3) and the die core (5); wherein, thick positioning mechanism includes:
a positioning column (17) arranged at the upper end part of the mold core (5);
the positioning hole (18) is arranged in the upper die (3) and used for extending into the positioning column (17);
and a guide taper part (19) which is arranged at the upper end part of the positioning column (17) and is used for guiding the positioning column (17) to extend into the positioning hole (18) and is small at the top and big at the bottom.
6. The polytetrafluoroethylene oil seal die according to claim 1, wherein a fine positioning mechanism for finely positioning the position of the upper die (3) relative to the lower die (4) is arranged between the upper die (3) and the lower die (4).
7. The polytetrafluoroethylene oil seal mold of claim 6, wherein said fine positioning mechanism comprises:
a positioning taper part (20) arranged on the lower die (4);
and the positioning taper part (20) is matched with the matching taper part (6) to accurately position the position of the upper die (3) relative to the lower die (4) when the upper die (3) and the lower die (4) are closed.
8. The polytetrafluoroethylene oil seal mold according to claim 1,
the lower die (4) is provided with a die core hole (21) for sliding matching with the die core (5);
and a limiting mechanism for limiting the sliding stroke of the mold core (5) is arranged between the mold core (5) and the lower mold (4).
9. The polytetrafluoroethylene oil seal mold according to claim 8, wherein said limiting mechanism comprises:
a limiting bulge (22) arranged in the die core hole (21);
the limiting step (23) is arranged on the mold core (5) and is abutted against the upper end part of the limiting bulge (22) to limit the mold core (5) to continuously slide downwards when the mold core (5) slides to a forming station;
and the clamp spring (24) is arranged at the lower end part of the mold core (5) and is used for abutting against the lower end part of the limiting bulge (22) to limit the mold core (5) to continuously slide upwards when the mold core (5) slides to an ejection station.
10. The polytetrafluoroethylene oil seal mold according to claim 8,
a positioning conical surface (25) with a large upper part and a small lower part is arranged in the die core hole (21);
the mold core (5) is provided with a matching conical surface (26) matched with the positioning conical surface (25), so that when the mold core (5) slides to the molding station, the matching conical surface (26) is matched with the positioning conical surface (25) to position the mold core (5) relative to the lower mold (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921815751.3U CN210791759U (en) | 2019-10-25 | 2019-10-25 | Polytetrafluoroethylene oil seal mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921815751.3U CN210791759U (en) | 2019-10-25 | 2019-10-25 | Polytetrafluoroethylene oil seal mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210791759U true CN210791759U (en) | 2020-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921815751.3U Active CN210791759U (en) | 2019-10-25 | 2019-10-25 | Polytetrafluoroethylene oil seal mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210791759U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092269A (en) * | 2020-08-06 | 2020-12-18 | 广东亿达汽车密封件股份有限公司 | Double-color rubber oil seal mold |
| CN118906390A (en) * | 2024-10-11 | 2024-11-08 | 河北华密新材科技股份有限公司 | Forming die with PTFE patch oil seal as lip |
-
2019
- 2019-10-25 CN CN201921815751.3U patent/CN210791759U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112092269A (en) * | 2020-08-06 | 2020-12-18 | 广东亿达汽车密封件股份有限公司 | Double-color rubber oil seal mold |
| CN118906390A (en) * | 2024-10-11 | 2024-11-08 | 河北华密新材科技股份有限公司 | Forming die with PTFE patch oil seal as lip |
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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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