CN219235992U - Forming die of rotating shaft double-lip sealing ring - Google Patents

Abstract

The utility model discloses a forming die of a double-lip sealing ring of a rotating shaft, which comprises an upper die, a middle die, a framework outer circle positioning ring, a lower die and a die core, wherein annular conical surfaces are arranged at the lower end of the upper die, die core holes are formed in the centers of the middle die and the lower die, the die core penetrates through the die core holes of the middle die and the lower die, annular gaps are formed in the inner edge of the upper end of the die core and the outer edge of the upper end of the middle die, two annular gaps form a material injection cavity, a gummosis channel is arranged between the middle die and the die core, the gummosis channel is communicated with the material injection cavity and a forming cavity, a positioning ring annular cavity is arranged between the middle die and the lower die, a framework outer circle positioning ring is arranged in the positioning ring annular cavity, and a forming cavity is formed between the die core and the middle die, the framework outer circle positioning ring and the lower die. The mold is of a mold structure with a transfer injection molding structure, can greatly improve the compactness of the prepared product, is beneficial to prolonging the service life of the prepared product, has higher degree of automation, improves the productivity and realizes the mass production of the product.

Description

Forming die of rotating shaft double-lip sealing ring

Technical Field

The utility model belongs to the technical field of sealing rubber ring molds, and particularly relates to a forming mold of a double-lip sealing ring of a rotating shaft.

Background

The rotary shaft sealing ring, also called rotary shaft lip sealing ring, is installed between the rotary shaft and the stationary part and is used for sealing lubricating oil leakage and preventing external dust and sundries from invading the dynamic sealing element of the equipment.

There is an outer framework double-lip sealing ring for a high-speed rotating shaft in the prior art, the whole sealing ring is of an annular structure, and comprises a rubber double-lip on the inner diameter side and a metal ring body on the outer diameter side, wherein the rubber double-lip and the metal ring body are integrally formed, the metal ring body is an outer framework of the rubber double-lip, the section of the metal ring body is L-shaped, and the metal ring body sequentially comprises a long vertical section, a bending section and a transverse straight section. The rubber double lips are arranged in the inner side spaces of the long vertical section, the bending section and the transverse straight section, rubber is coated on the whole inner side of the long vertical section, and the schematic diagram of the product is shown in fig. 1.

The sealing ring is prepared by using a special die, and a brand new die design is needed.

Disclosure of Invention

The utility model provides a forming die of a rotating shaft double-lip sealing ring, which solves the preparation problem of the rotating shaft double-lip sealing ring.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a forming die of rotation axis double-lip sealing washer, includes mould, well mould, skeleton excircle holding ring, lower mould and mold core, the lower extreme of going up the mould is provided with annular conical surface, well mould and lower mould central authorities all are equipped with the mold core hole, and the mold core wears to locate in the mold core hole of well mould and lower mould, and the upper end inner edge of mold core, the upper end outer fringe of well mould all are equipped with annular breach, and two annular breach constitute the notes material chamber, set up the gummosis passageway between well mould and mold core, gummosis passageway and notes material chamber and shaping die cavity intercommunication be equipped with holding ring annular chamber between well mould and the lower mould, holding ring annular intracavity sets up skeleton excircle holding ring, constitute the shaping die cavity between mold core and well mould, skeleton excircle holding ring, the lower mould.

Further, the mold core comprises an upper mold core and a lower mold core, the upper mold core is connected with the lower mold core through a central bolt, and a forming cavity is formed between the outer diameter end face of the upper mold core and the lower end face of the middle mold, the inner diameter end face of the outer circle positioning ring of the framework and the upper end face of the lower mold.

Further, the upper end face of the lower die is provided with a convex lower model table, and a sealing ring framework is additionally arranged between the framework outer circle positioning ring and the lower model table.

Further, the lower mold core comprises a limiting disc at the lower end and a cylindrical main body at the upper part of the limiting disc, a limiting table is arranged in a mold core hole of the lower mold, and the lower mold core can move upwards in the mold core hole of the lower mold and is limited through the limiting table.

Furthermore, the sealing ring framework is in an inverted L shape.

Further, a sealing platform is arranged between the lower end of the middle die and the sealing ring framework.

Further, a residual glue groove is arranged at the lower end of the molding cavity, between the lower die and the upper die core.

Furthermore, a positioning pin hole is formed among the upper die, the middle die and the lower die, and the upper die, the middle die and the lower die are positioned through positioning pins.

Further, the forming die comprises a plurality of die units, and each die unit forms a forming cavity.

Compared with the prior art, the utility model has the following beneficial effects:

1. the forming die for the rotating shaft double-lip sealing ring has the advantages that the forming die is of a die structure with a transfer injection molding glue injection structure, the compactness of a prepared product can be greatly improved, the service life of the prepared product is prolonged, the automation degree of the forming die is high, the productivity is improved, and the mass production of the product is realized.

2. In one embodiment of the utility model, the rubber sealing table is designed at the lower end of the middle die and at the position corresponding to the boundary between the rubber and the sealing ring framework, so that excessive rubber running to the exposed part of the sealing ring framework in the vulcanization process can be effectively prevented from overflowing, the exposed part of the sealing ring framework is prevented from being uneven, and the dimensional stability and sealing performance of the product are improved.

3. In one embodiment of the utility model, the mold core comprises an upper mold core and a lower mold core, the lower mold core can eject a product, so that the product can be conveniently demolded, and meanwhile, the mold comprises a plurality of mold units, one mold has multiple cavities, so that the production rate and the production quality of the product are greatly improved.

It is, of course, not necessary for all of the above advantages to be achieved simultaneously in the practice of the various aspects of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a seal ring in the background of the utility model;

FIG. 2 is a schematic structural view of a seal ring skeleton;

FIG. 3 is a schematic view showing the overall structure of a mold according to embodiment 1 of the present utility model;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

FIG. 5 is an enlarged schematic view of FIG. 4 at B;

FIG. 6 is a schematic view of the lower mold core structure of embodiment 1 of the present utility model;

FIG. 7 is a schematic view of the lower die structure of embodiment 1 of the present utility model;

FIG. 8 is a schematic drawing of the demolding process of example 1 of the present utility model;

FIG. 9 is a schematic view showing the overall structure of a mold according to embodiment 2 of the present utility model;

in the figure, the mold comprises a 1-upper mold, a 2-middle mold, a 3-framework outer circle positioning ring, a 4-lower mold, a 5-upper mold core, a 6-lower mold core, a 7-center bolt, an 8-material injection cavity, a 9-gumming channel, a 10-framework outer circle positioning ring, a 11-lower mold table, a 12-positioning ring bolt, a 13-sealing ring framework, a 14-limiting disc, a 15-cylindrical main body, a 16-limiting table, a 17-gumming table, an 18-residual gum groove, a 19-positioning pin and a 20-ejection tool.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be. The present utility model will be described in detail with reference to the accompanying drawings and examples.

Examples:

referring to fig. 3, a forming die for a double-lip seal ring of a rotating shaft comprises an upper die 1, a middle die 2, a framework outer circle positioning ring 3, a lower die 4 and a die core, wherein positioning pin holes are formed among the upper die 1, the middle die 2 and the lower die 4, and the upper die 1, the middle die 2 and the lower die 4 are positioned and installed through positioning pins 19.

The lower extreme of going up mould 1 is provided with annular conical surface, well mould 2 and lower mould 4 central authorities all are equipped with the mold core hole, the mold core wears to locate in the mold core hole of well mould and lower mould, the mold core includes mould core 5 (die cavity mold core) and lower mould core 6 (direction mold core), go up mould core 5 and lower mould core 6 and pass through center bolt 7 and be connected, the upper end inner edge of going up mould core 5, the upper end outer fringe of well mould 2 all is equipped with annular breach, two annular breach constitute annotates material chamber 8, set up the gummosis passageway 9 between well mould 2 and last mould core 5, gummosis passageway 9 and annotate material chamber 8 and shaping die cavity intercommunication, be equipped with the holding ring annular chamber between well mould 2 and lower mould 4, the holding ring annular intracavity sets up skeleton excircle holding ring 10 through holding ring bolt 12, constitute the shaping die cavity between the outer diameter terminal surface of going up mould core 5 and the terminal surface of well mould 2, skeleton excircle holding ring 10 internal diameter terminal surface, the upper end of lower mould 4.

The upper end surface of the lower die 4 is provided with a convex lower die table 11, the shape of the lower die table 11 corresponds to the shape of the double-lip sealing ring, a holding space is formed between the outer circle positioning ring 10 of the framework and the outer diameter side of the lower die table 11 for holding the sealing ring framework 13, and the sealing ring framework 13 is in an inverted L shape, as shown in figure 2.

Referring to fig. 6 and 7, the lower mold core 6 has a "convex" structure, including a limit disk 14 at the lower end and a cylindrical main body 15 at the upper part of the limit disk 14, a limit table 16 is disposed in a mold core hole of the lower mold 4, and the lower mold core 6 can move upward in the mold core hole of the lower mold 4 and is limited by the limit table 16 to prevent slipping.

Referring to fig. 4 and 5, in order to prevent excessive rubber from running to the exposed part of the upper end of the seal ring framework 13, on the lower end face of the middle mold 2, an annular seal rubber table 17 is arranged at the boundary between the middle mold 2 and the seal ring framework 13, the seal rubber table 17 is an annular boss, in this embodiment, the height of the protrusion of the seal rubber table 17 is 0.2mm, the width is 0.5mm, the seal rubber table 17 and the seal ring framework 13 are tightly pressed, and the effect of blocking the rubber is achieved, so that the seal ring framework 13 of the manufactured product has a complete and clean appearance, the use safety performance of the product is improved, and the service life is prolonged.

Meanwhile, a residual glue groove 18 is arranged at the lower end of the molding cavity, between the lower die 4 and the upper die core 5, and the residual glue groove 18 is used for extruding more glue stock in the molding cavity during vulcanization, so that the flaw and the flash thickness of a product are reduced.

The working steps and principles of the forming die of the utility model are described in detail below by taking a typical product parameter as an example, the product is of a double-lip structure, the product parameter is phi 126 multiplied by phi 110 multiplied by 12, wherein 126mm is the outer diameter of the sealing ring, 110mm is the inner diameter of the sealing ring, 12mm is the height of the sealing ring, and the thickness of the framework of the sealing ring is 1.2mm.

The method comprises the following specific steps:

step S1, loading the ring body framework into a special sand blasting tool, and carrying out sand blasting treatment on the vulcanized surface of the ring body framework 1, which needs to be compounded with rubber, by using a manual sand blasting machine, wherein the surface of the ring body framework after sand blasting is required to reach silvery white, and the sand blasting surface is shown in a thickened part in FIG. 2.

And S2, cleaning the ring body framework by using gasoline, airing at room temperature, brushing an adhesive on the sand blasting surface, and airing at room temperature in a ventilation environment for later use.

And S3, cutting the film into adhesive tapes for standby.

S4, preheating the forming die to a specified temperature, opening the upper die and the middle die of the upper die and the middle die, placing the outer circle positioning ring of the framework into a positioning ring annular cavity corresponding to the upper end of the lower die, and then fixing the ring framework in the forming cavity according to an inverted L shape.

And S5, closing the middle mold, putting the adhesive tape into the material injection cavity, closing the upper mold, and performing press vulcanization. Under high temperature and high pressure, the adhesive tape can soften and have fluidity, under the continuous pressure effect, can flow to the molding cavity along the gumming channel, because the middle mould is provided with the sealing platform with skeleton boundary department, when pressing, sealing platform and the horizontal straight section contact of circle body skeleton, area of contact is little, and pressure is big, seals the closely compresses tightly of gluey platform and circle body skeleton, plays the effect of a separation to rubber materials.

And S6, after vulcanization is finished, opening an upper die of the die, taking out the more sizing materials in the material injection cavity, opening a middle die, and using an ejection tool 20 to upwards eject the lower die core from a die core hole of the lower die 4, wherein the upper die core can move upwards together with a product, the product is separated from a forming die cavity, and the demolding process is shown in FIG. 8.

And S7, because the ring body framework is tightly matched with the mounting cylinder of the high-speed rotating shaft, the outer diameter of the ring body framework needs to be subjected to secondary processing, and the roundness change of the outer circle caused by the deformation of the metal framework in the vulcanization process is eliminated.

Example 2:

unlike embodiment 1, referring to fig. 9, the upper die 1, the middle die 2, the two sets of skeleton outer circle positioning rings 3, the lower die 4, the two sets of upper die cores 5 and the lower die cores 6 of the forming die of this embodiment form two sets of die units, wherein the upper die 1, the middle die 2 and the lower die 4 are positioned and installed by positioning pins 19, and each die unit forms a forming cavity, so that simultaneous production of two sets of rotating shaft double-lip sealing rings can be realized. In other embodiments, the forming mold may include more sets of mold units, so as to realize mass production of products, thereby greatly improving productivity.

The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.

Claims (9)

1. The utility model provides a forming die of rotation axis double-lip sealing washer, its characterized in that, including last mould, well mould, skeleton excircle holding ring, lower mould and mold core, the lower extreme of going up the mould is provided with annular conical surface, well mould and lower mould central authorities all are equipped with the mold core hole, and the mold core wears to locate in the mold core hole of well mould and lower mould, and the upper end inner edge of mold core, the upper end outer fringe of well mould all are equipped with annular breach, and two annular breach constitute and annotate the material chamber, set up the gummosis passageway between well mould and mold core, gummosis passageway and annotate material chamber and shaping die cavity be equipped with holding ring annular chamber between well mould and the lower mould, holding ring annular intracavity sets up skeleton excircle holding ring, constitute the shaping die cavity between mold core and well mould, skeleton excircle holding ring, the lower mould.

2. The forming die for the double-lip seal ring of the rotary shaft according to claim 1, wherein the die core comprises an upper die core and a lower die core, the upper die core is connected with the lower die core through a central bolt, and a forming cavity is formed between the outer diameter end face of the upper die core and the lower end face of the middle die, the inner diameter end face of the outer circle positioning ring of the framework and the upper end face of the lower die.

3. The rotary shaft double-lip seal ring forming die according to claim 2, wherein the upper end face of the lower die is provided with a convex lower model table, and a seal ring framework is additionally arranged between the framework outer circle positioning ring and the lower model table.

4. The rotary shaft double-lip seal ring forming die according to claim 3, wherein the lower die core comprises a limit disc at the lower end and a cylindrical main body at the upper part of the limit disc, a limit table is arranged in a die core hole of the lower die, and the lower die core can move upwards in the die core hole of the lower die and is limited by the limit table.

5. The rotary shaft double lip seal molding die as defined in claim 4, wherein the seal ring frame has an inverted "L" shape.

6. The rotary shaft double-lip seal molding die according to claim 5, wherein a seal table is provided between the lower end of the intermediate die and the seal ring frame.

7. The rotary shaft double lip seal molding die as claimed in claim 6, wherein a surplus glue groove is provided between the lower end of the molding cavity, the lower die and the upper die core.

8. The rotary shaft double lip seal molding die as claimed in claim 7, wherein a positioning pin hole is provided between the upper die, the middle die and the lower die, and the upper die, the middle die and the lower die are positioned by positioning pins.

9. The rotary shaft double lip seal forming die of claim 8, wherein the forming die comprises a plurality of die units, each die unit forming a forming cavity.

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