CN108061159B - Sealing diaphragm of fuel pump and production process method thereof - Google Patents
Sealing diaphragm of fuel pump and production process method thereof Download PDFInfo
- Publication number
- CN108061159B CN108061159B CN201810060208.0A CN201810060208A CN108061159B CN 108061159 B CN108061159 B CN 108061159B CN 201810060208 A CN201810060208 A CN 201810060208A CN 108061159 B CN108061159 B CN 108061159B
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- sealing body
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- 238000007789 sealing Methods 0.000 title claims abstract description 162
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000446 fuel Substances 0.000 title abstract description 32
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 55
- 238000003825 pressing Methods 0.000 claims abstract description 30
- 239000012528 membrane Substances 0.000 claims description 50
- 238000004080 punching Methods 0.000 claims description 16
- 239000004744 fabric Substances 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 10
- 238000004073 vulcanization Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims 4
- 239000000295 fuel oil Substances 0.000 abstract description 12
- 239000003921 oil Substances 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 description 18
- 239000000084 colloidal system Substances 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 239000012466 permeate Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/108—Special methods for making a non-metallic packing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention discloses a sealing diaphragm of a fuel pump and a production process method thereof, wherein the sealing diaphragm comprises an elastic sealing body and a reinforcing layer, the elastic sealing body comprises a pressure bearing surface and a pressing surface which are oppositely arranged, the elastic sealing body is provided with a mounting through hole which penetrates through the pressure bearing surface and the pressing surface, and the reinforcing layer is clamped between the pressure bearing surface and the pressing surface; a first sealing layer is arranged between the reinforcing layer and the inner side wall of the mounting through hole, or/and a second sealing layer is arranged between the reinforcing layer and the outer side wall of the elastic sealing body. The sealing diaphragm can effectively avoid oil seepage caused by direct contact between fuel oil and the reinforcing layer, and improves the reliability of the fuel pump and the friction vehicle.
Description
Technical Field
The invention relates to the technical field of fuel pump sealing, in particular to a sealing diaphragm of a fuel pump and a production process method thereof.
Background
Sealing membranes commonly used in the sealing structures of the current fuel pumps are generally added with a base cloth structure in the middle layer of an elastic layer for improving strength and durability.
The middle part of driven fuel pump sealing diaphragm has been offered and has been supplied the support column to pass the through-hole to with fixed plate fixed sealing diaphragm, this structure has following problem: if the matching precision of the support column and the fixing plate is not well controlled, gaps are generated between the support column and the fixing plate, fuel oil in the cavity can be contacted with base cloth of the middle layer of the membrane through the gaps, the base cloth does not have a sealing effect, and the fuel oil can permeate out of the cavity through the base cloth, so that the phenomenon of oil seepage is caused; meanwhile, when fuel oil permeates into the base cloth, the bonding capability of the rubber sheet and the base cloth is reduced, and the rubber sheet and the base cloth can be peeled off after durability, so that the rubber sheet is damaged.
Disclosure of Invention
Based on the above, it is necessary to provide a sealing membrane for a fuel pump and a production process thereof, which can effectively avoid the phenomenon of oil seepage caused by direct contact between fuel and a reinforcing layer, and improve the reliability of the fuel pump and a friction vehicle.
The technical scheme is as follows:
In one aspect, the embodiment provides a sealing membrane of a fuel pump, which comprises an elastic sealing body and a reinforcing layer, wherein the elastic sealing body comprises a pressure bearing surface and a pressing surface which are oppositely arranged, the elastic sealing body is provided with a mounting through hole which penetrates through the pressure bearing surface and the pressing surface, and the reinforcing layer is clamped between the pressure bearing surface and the pressing surface; a first sealing layer is arranged between the inner side wall of the reinforced layer and the inner side wall of the mounting through hole, or/and a second sealing layer is arranged between the outer side wall of the reinforced layer and the outer side wall of the elastic sealing body.
When the sealing diaphragm is applied to the fuel pump, the sealing diaphragm is fixedly arranged on the supporting column through the mounting through hole, the pressing surface is pressed against the supporting column, the fixing plate is in interference fit with the supporting column, and the fixing plate is pressed against the pressure bearing surface; meanwhile, by arranging the first sealing layer or/and the second sealing layer, gaps can be formed between the support columns and the fixing plates even if the matching precision of the support columns and the fixing plates is not well controlled, and fuel in the cavity cannot leak out through the reinforcing layer. Specifically, the first sealing layer is arranged between the inner side wall of the reinforced layer (at the moment, the reinforced layer is provided with the through hole) and the inner side wall of the mounting through hole, so that fuel oil can be prevented from penetrating into the reinforced layer, the bonding capability between the elastic sealing body and the reinforced layer is reduced, and the service life of the sealing membrane can be prolonged.
The technical scheme is further described as follows:
In one embodiment, the elastic sealing body is an elastic rubber body, and the reinforcing layer is a base cloth layer. Is convenient to manufacture and reduces the production cost
In one embodiment, the first sealing layer is a first sealing colloid, or/and the second sealing layer is a second sealing colloid. And the first sealing colloid or the second sealing colloid can be used for preventing fuel oil from leaking out, and can be used as a connecting body (can be integrally formed with the elastic sealing body during manufacturing) to enhance the connection strength of the elastic sealing body and prolong the service life of the sealing membrane.
In one embodiment, the reinforcement layer is provided with a plurality of protrusions protruding outwards or/and a plurality of recesses recessed inwards. Furthermore, the outer surface area of the reinforcing layer can be enlarged by arranging a plurality of bulges or concave parts, so that the contact area between the reinforcing layer and the elastic sealing body is increased within a limited size range, and the bonding between the reinforcing layer and the elastic sealing layer is firmer.
In one embodiment, the pressing surface is provided with an annular groove concavely formed inwards.
In one embodiment, the mounting through hole includes a first through hole and a second through hole, the first through hole is disposed near the bearing surface, the second through hole is disposed near the pressing surface, and a diameter of the first through hole is smaller than a diameter of the second through hole.
In one embodiment, an end of the inner sidewall of the second through hole is provided with an introduction portion. Furthermore, the sealing membrane is conveniently guided and installed on the support column by the guide part.
On the other hand, the embodiment also provides a production process method of the sealing membrane, which comprises the following steps:
(1) Setting the first elastic layer at a first preset position;
(2) Punching the reinforced base layer according to preset requirements, and fixing the punched reinforced base layer at a second preset position on the first elastic layer;
(3) The second elastic layer is fixedly arranged on the reinforced base layer, and bonding and vulcanization treatment is carried out to obtain a semi-finished membrane product;
(4) Punching the semi-finished membrane product according to the size requirement of the membrane to form an elastic sealing body between the first elastic layer and the second elastic layer, wherein the elastic sealing body is provided with a mounting through hole to form a reinforced layer on the reinforced base layer and is clamped in the elastic sealing body; and a first sealing layer is formed between the inner side wall of the reinforced layer and the inner side wall of the mounting through hole, or/and a second sealing layer is formed between the outer side wall of the reinforced layer and the outer side wall of the elastic sealing body.
And then, by utilizing the production process method, the reinforced base layer can be punched according to the size and the structural requirement of the sealing membrane which is required to be produced, meanwhile, the punched reinforced base layer can be arranged on the first elastic layer, the second elastic layer is covered, bonding and vulcanization treatment can be carried out, the first elastic layer, the reinforced base layer and the second elastic layer are bonded to form a membrane semi-finished product, and then, the membrane semi-finished product is punched, so that the sealing membrane can be obtained. The production process method realizes the production and manufacture of the sealing diaphragm, and when the sealing diaphragm is applied to a fuel pump, gaps are generated between the support columns and the fixing plates even if the matching precision of the support columns and the fixing plates is not well controlled, and fuel in the cavity cannot leak outside through the reinforcing layer; and further, the phenomenon of oil seepage caused by direct contact between the fuel oil and the reinforcing layer can be effectively avoided, and the service life of the sealing diaphragm is prolonged.
The technical scheme is further described as follows:
In one embodiment, in the step (2), blanking the reinforced base layer according to the preset requirement includes the following method: punching a plurality of through holes on the reinforced base layer according to preset intervals, wherein the aperture of each through hole is larger than the diameter of each mounting through hole; or punching out a plurality of reinforcing layers on the reinforcing base layer, wherein the outer diameter of the reinforcing layers is smaller than that of the elastic sealing body; or punching out a plurality of reinforced layers with circular ring structures on the reinforced base layer, wherein the inner holes of the reinforced layers are larger than the inner diameter of the mounting through holes, and the outer diameter of the reinforced layers is smaller than the outer diameter of the elastic sealing body. And a plurality of reinforcement layers can be punched or preset on one reinforcement base layer, so that a plurality of sealing diaphragms can be conveniently obtained in one-step molding, and the production efficiency of the sealing diaphragms is improved.
In one embodiment, before step (1), further comprising: and manufacturing a mold core provided with a plurality of molding mold cavities, injecting sizing material into the molding mold cavities through certain pressure, and forming a plurality of first elastic layers after curing. And then can carry out batch production to first elastic layer, one shot forming is a plurality of, is convenient for improve production efficiency.
Drawings
FIG. 1 is a schematic illustration of a seal membrane in a semi-section in one embodiment;
FIG. 2 is a schematic illustration of a sealing membrane in a semi-section of another embodiment;
FIG. 3 is a schematic view in semi-section of a sealing membrane in yet another embodiment;
FIG. 4 is a schematic partial cross-sectional view of a fuel pump in one embodiment;
FIG. 5 is a schematic diagram of a process for manufacturing a sealing membrane according to an embodiment.
Reference numerals illustrate:
100. The sealing membrane comprises a sealing membrane body, 110, an elastic sealing body, 111, a pressure bearing surface, 112, a pressing surface, 113, a mounting through hole, 102, a first through hole, 104, a second through hole, 106, an introduction part, 114, a first sealing layer, 115, a second sealing layer, 116, an annular groove, 120, a reinforcing layer, 200, a support column, 300, a fixing plate, 10, a mold core, 12, a molding cavity, 20, a reinforcing base layer, 22, a through hole, 30 and a second elastic layer.
Detailed Description
The present invention will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" to "or" secured "to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.
As shown in fig. 1, in an embodiment of the invention, the sealing membrane 100 includes an elastic sealing body 110 and a reinforcement layer 120, the elastic sealing body 110 includes a pressure-bearing surface 111 and a pressing surface 112 disposed opposite to each other, the elastic sealing body 110 is provided with a mounting through hole 113 penetrating the pressure-bearing surface 111 and the pressing surface 112, and the reinforcement layer 120 is sandwiched between the pressure-bearing surface 111 and the pressing surface 112; a first sealing layer 114 is provided between the inner side wall of the reinforcing layer 120 (in this case, the reinforcing layer is provided with a through hole) and the inner side wall of the mounting through hole 113.
When the sealing membrane 100 is applied to a fuel pump, the sealing membrane 100 is fixedly arranged on the support column 200 through the mounting through hole 113, the pressing surface 112 is pressed against the support column 200, the fixing plate 300 is in interference fit with the support column 200, and the fixing plate 300 is pressed against the pressure-bearing surface 111; meanwhile, by arranging the first sealing layer 114, even if the matching precision of the support column 200 and the fixing plate 300 is not well controlled, gaps can be generated between the support column 200 and the fixing plate 300, and the contact between fuel and the reinforcing layer 120 can be avoided, so that the fuel in the cavity is prevented from leaking out through the reinforcing layer 120; at the same time, the fuel is prevented from penetrating into the base cloth, so that the bonding capability between the elastic sealing body 110 and the reinforcing layer 120 is reduced, and the service life of the sealing membrane 100 is prolonged.
In another embodiment of the present invention, as shown in fig. 2, the sealing membrane 100 includes an elastic sealing body 110 and a reinforcement layer 120, the elastic sealing body 110 includes a pressure-bearing surface 111 and a pressing surface 112 disposed opposite to each other, the elastic sealing body 110 is provided with a mounting through hole 113 passing through the pressure-bearing surface 111 and the pressing surface 112, and the reinforcement layer 120 is sandwiched between the pressure-bearing surface 111 and the pressing surface 112; a second sealing layer 115 is provided between the outer sidewall of the reinforcing layer 120 and the outer sidewall of the elastic sealing body 110.
When the sealing membrane 100 is applied to a fuel pump, the sealing membrane 100 is fixedly arranged on the support column 200 through the mounting through hole 113, the pressing surface 112 is pressed against the support column 200, the fixing plate 300 is in interference fit with the support column 200, and the fixing plate 300 is pressed against the pressure-bearing surface 111; meanwhile, by arranging the second sealing layer 115, even if the matching precision of the support column 200 and the fixing plate 300 is not well controlled, gaps can be generated between the support column 200 and the fixing plate 300, and fuel in the cavity cannot leak out through the reinforcing layer 120.
As shown in fig. 3, in yet another embodiment of the present invention, the sealing membrane 100 includes an elastic sealing body 110 and a reinforcement layer 120, the elastic sealing body 110 includes a pressure-bearing surface 111 and a pressing surface 112 disposed opposite to each other, the elastic sealing body 110 is provided with a mounting through hole 113 disposed through the pressure-bearing surface 111 and the pressing surface 112, and the reinforcement layer 120 is sandwiched between the pressure-bearing surface 111 and the pressing surface 112; a first sealing layer 114 is provided between the inner side wall of the reinforcing layer 120 (in this case, the reinforcing layer is provided with a through hole) and the inner side wall of the mounting through hole 113, and a second sealing layer 115 is provided between the reinforcing layer 120 and the outer side wall of the elastic sealing body 110.
When the sealing membrane 100 is applied to a fuel pump, the sealing membrane 100 is fixedly arranged on the support column 200 through the mounting through hole 113, the pressing surface 112 is pressed against the support column 200, the fixing plate 300 is in interference fit with the support column 200, and the fixing plate 300 is pressed against the pressure-bearing surface 111; meanwhile, by arranging the first sealing layer 114 and the second sealing layer 115, even if the matching precision of the support column 200 and the fixing plate 300 is not well controlled, gaps can be generated between the support column 200 and the fixing plate 300, and fuel in the cavity cannot leak out through the reinforcing layer 120; at the same time, the first sealing layer 114 can prevent fuel oil from penetrating into the reinforced layer, so that the bonding capability between the elastic sealing body 110 and the reinforced layer 120 is reduced, and the service life of the sealing membrane 100 is further prolonged.
Based on any of the above embodiments, the elastic sealing body 110 is an elastic rubber body, and the reinforcing layer 120 is a base cloth layer; is convenient to manufacture and reduces the production cost. Further, the first sealing layer 114 is a first sealing compound, and/or the second sealing layer 115 is a second sealing compound. Furthermore, the first sealing colloid or the second sealing colloid can prevent the fuel oil from leaking out, and can be used as a connecting body (the connecting body can be integrally formed with the elastic sealing body during manufacturing) to enhance the connection strength of the elastic sealing body 110 and prolong the service life of the sealing membrane 100.
In one embodiment, the reinforcement layer 120 is provided with a plurality of protrusions protruding outwards or/and a plurality of recesses recessed inwards; further, the outer surface area of the reinforcing layer 120 can be enlarged by providing a plurality of protrusions or recesses, and the contact area between the reinforcing layer 120 and the elastic sealing body 110 can be increased within a limited size range, so that the bonding between the reinforcing layer 120 and the elastic sealing layer is more secure.
In another embodiment, the outer surface of the reinforcement layer 120 is provided with a plurality of barb structures. Further, by providing the barb structure, even if fuel oil permeates into the reinforcing layer 120, the reinforcing layer 120 and the elastic sealing body 110 can be reliably connected, and are not easy to separate.
On the basis of any of the above embodiments, the pressing surface 112 is provided with an annular groove 116 concavely formed inwards.
On the basis of any of the above embodiments, the mounting through hole 113 includes a first through hole 102 and a second through hole 104, the first through hole 102 is disposed near the pressure bearing surface 111, the second through hole 104 is disposed near the pressure bearing surface 112, and the diameter of the first through hole 102 is smaller than the diameter of the second through hole 104; and further is convenient to be matched with the support column 200 in a mounting way, so that the stepped hole is formed for matching and combining, and the fuel oil infiltration rate can be reduced. Further, an end portion of the inner wall of the second through hole 104 is provided with an introduction portion 106. Further, the sealing membrane 100 is easily mounted on the support column 200 by the introduction portion 106.
As shown in fig. 4, this embodiment further provides a fuel pump, which includes the sealing membrane 100, a support column 200, and a fixing plate 300, wherein the sealing membrane 100 is fixedly disposed on the support column 200 through a mounting through hole 113, the pressing surface 112 abuts against the support column 200, the fixing plate 300 is in interference fit with the support column 200, and the fixing plate 300 abuts against the pressure bearing surface 111.
The fuel pump utilizes the sealing membrane 100, can effectively reduce the phenomenon of oil seepage, and improves the working performance and reliability of the fuel pump.
The embodiment also provides a motorcycle comprising the fuel pump. The motorcycle adopts the fuel pump, so that the reliability of the motorcycle is further improved, and the failure rate of the motorcycle is reduced.
In addition, as shown in fig. 5, another embodiment also provides a production process method of the sealing membrane, which comprises the following steps:
(1) Setting the first elastic layer at a first preset position;
(2) Punching the reinforced base layer 20 according to preset requirements, and fixing the punched reinforced base layer 20 at a second preset position on the first elastic layer;
(3) The second elastic layer 30 is fixedly arranged on the reinforced base layer 20, and bonding and vulcanization treatment is carried out to obtain a semi-finished membrane product;
(4) Punching the semi-finished membrane according to the membrane size requirement to form an elastic sealing body between the first elastic layer and the second elastic layer 30, wherein the elastic sealing body is provided with a mounting through hole, so that the reinforced base layer 20 forms a reinforced layer and is clamped in the elastic sealing body; and a first sealing layer is formed between the inner side wall of the reinforced layer and the inner side wall of the mounting through hole, or/and a second sealing layer is formed between the outer side wall of the reinforced layer and the outer side wall of the elastic sealing body.
Furthermore, by using the above production process, the reinforcement base layer 20 can be blanked according to the size and structure requirements of the sealing membrane to be produced, and meanwhile, the blanked reinforcement base layer 20 can be arranged on the first elastic layer and covered with the second elastic layer 30, so that bonding and vulcanization treatment can be performed, a piece of membrane semi-finished product is formed by bonding the first elastic layer, the reinforcement base layer 20 and the second elastic layer 30, and then blanking treatment is performed on the membrane semi-finished product, so that the sealing membrane can be obtained. The production process method realizes the production and manufacture of the sealing diaphragm, and when the sealing diaphragm is applied to a fuel pump, gaps are generated between the support columns and the fixing plates even if the matching precision of the support columns and the fixing plates is not well controlled, and fuel in the cavity cannot leak outside through the reinforcing layer; and further, the phenomenon of oil seepage caused by direct contact between the fuel oil and the reinforcing layer can be effectively avoided, and the service life of the sealing diaphragm is prolonged.
Specifically, before step (1), the method further comprises: the method comprises the steps of manufacturing a mold core 10 provided with a plurality of molding cavities 12, injecting sizing material into the molding cavities 12 through a certain pressure, and forming a plurality of first elastic layers after curing. And then can carry out batch production to first elastic layer, one shot forming is a plurality of, is convenient for improve production efficiency. Still further, in the step (2), blanking the reinforcement base layer 20 according to the preset requirements includes the following methods: punching a plurality of through holes on the reinforcing base layer 20 at a preset interval, wherein the hole diameter of the through holes is larger than the diameter of the mounting through holes (as shown in fig. 5); or punching out a plurality of reinforcing layers on the reinforcing base layer 20, wherein the outer diameter of the reinforcing layers is smaller than that of the elastic sealing body; or punching a plurality of reinforced layers with circular ring structures on the reinforced base layer 20, wherein the inner hole of the reinforced layer is larger than the inner diameter of the mounting through hole, and the outer diameter of the reinforced layer is smaller than the outer diameter of the elastic sealing body. And a plurality of reinforcement layers can be punched or preset on one reinforcement base layer 20, so that a plurality of sealing diaphragms can be obtained in one-step molding, and the production efficiency of the sealing diaphragms is improved.
In addition, the reinforcement base layer 20 is a base cloth layer, and is pre-fixed between the first elastic layer and the second elastic layer 30 by bonding; further, glue is applied to the two bonding surfaces of the base layer, and then the two bonding surfaces are placed on the first layer of rubber, wherein the through holes or the peripheral wall of the base layer are aligned with and concentric with the molding cavity 12; further, when the bonding and vulcanizing process is performed, the first elastic layer and the second elastic layer 30 are heated and fused to form an elastic body, and a plurality of annular elastic sealing bodies are respectively punched at corresponding positions of the elastic body.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The production process method of the sealing diaphragm is characterized by comprising the following steps:
(1) Setting the first elastic layer at a first preset position;
(2) Punching the reinforced base layer according to preset requirements, and fixing the punched reinforced base layer at a second preset position on the first elastic layer;
(3) The second elastic layer is fixedly arranged on the reinforced base layer, and bonding and vulcanization treatment is carried out to obtain a semi-finished membrane product;
(4) Punching the semi-finished membrane product according to the size requirement of the membrane to form an elastic sealing body between the first elastic layer and the second elastic layer, wherein the elastic sealing body is provided with a mounting through hole to form a reinforced layer on the reinforced base layer and is clamped in the elastic sealing body; and a first sealing layer is formed between the inner side wall of the reinforcing layer and the inner side wall of the mounting through hole, a second sealing layer is formed between the outer side wall of the reinforcing layer and the outer side wall of the elastic sealing body, and the first sealing layer, the second sealing layer and the elastic sealing body are integrally formed.
2. The method of claim 1, wherein in step (2), punching the reinforcing base layer according to a predetermined requirement comprises the steps of: punching a plurality of through holes on the reinforced base layer according to preset intervals, wherein the aperture of each through hole is larger than the diameter of each mounting through hole; or punching out a plurality of reinforcing layers on the reinforcing base layer, wherein the outer diameter of the reinforcing layers is smaller than that of the elastic sealing body; or punching out a plurality of reinforced layers with circular ring structures on the reinforced base layer, wherein the inner holes of the reinforced layers are larger than the inner diameter of the mounting through holes, and the outer diameter of the reinforced layers is smaller than the outer diameter of the elastic sealing body.
3. The process for producing a sealing membrane according to claim 1 or 2, further comprising, before step (1): and manufacturing a mold core provided with a plurality of molding mold cavities, injecting sizing material into the molding mold cavities through certain pressure, and forming a plurality of first elastic layers after curing.
4. The method according to claim 1, wherein the sealing membrane comprises an elastic sealing body and a reinforcing layer, the elastic sealing body comprises a bearing surface and a pressing surface which are oppositely arranged, the elastic sealing body is provided with a mounting through hole which penetrates through the bearing surface and the pressing surface, and the reinforcing layer is clamped between the bearing surface and the pressing surface; a first sealing layer is arranged between the inner side wall of the reinforcing layer and the inner side wall of the mounting through hole, a second sealing layer is arranged between the outer side wall of the reinforcing layer and the outer side wall of the elastic sealing body, and the first sealing layer, the second sealing layer and the elastic sealing body are integrally formed.
5. The method according to claim 4, wherein the elastic sealing body is an elastic rubber body, and the reinforcing layer is a base cloth layer.
6. The method of claim 5, wherein the first sealant layer is a first sealant and the second sealant layer is a second sealant.
7. The method according to claim 4, wherein the reinforcing layer is provided with a plurality of protrusions protruding outwards or/and a plurality of recesses recessed inwards.
8. The method of claim 4, wherein the pressing surface is provided with an annular groove concavely formed.
9. The method according to any one of claims 4 to 8, wherein the mounting through hole includes a first through hole and a second through hole, the first through hole is disposed near the pressing face, the second through hole is disposed near the pressing face, and a diameter of the first through hole is smaller than a diameter of the second through hole.
10. The process for producing a sealing film according to claim 9, wherein,
An end part of the inner side wall of the second through hole is provided with an introduction part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810060208.0A CN108061159B (en) | 2018-01-22 | 2018-01-22 | Sealing diaphragm of fuel pump and production process method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810060208.0A CN108061159B (en) | 2018-01-22 | 2018-01-22 | Sealing diaphragm of fuel pump and production process method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN108061159A CN108061159A (en) | 2018-05-22 |
| CN108061159B true CN108061159B (en) | 2024-10-11 |
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| CN201810060208.0A Active CN108061159B (en) | 2018-01-22 | 2018-01-22 | Sealing diaphragm of fuel pump and production process method thereof |
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| CN111070750B (en) * | 2019-11-22 | 2022-04-22 | 广州机械科学研究院有限公司 | Production method of combined sealing element |
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| GB317534A (en) * | 1928-10-30 | 1929-08-22 | Harold William Hughes | Improvements relating to rubber valves, diaphragms, washers and the like |
| JP2003130219A (en) * | 2001-10-29 | 2003-05-08 | Fujikura Rubber Ltd | Manufacturing method for diaphragm |
| CN208041125U (en) * | 2018-01-22 | 2018-11-02 | 江门市大长江集团有限公司 | Motorcycle, fuel pump and its sealing diaphragm |
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| JP2726014B2 (en) * | 1995-01-06 | 1998-03-11 | 株式会社ワイ・テイ・エス | Diaphragm assembly and method of manufacturing the same |
| JP2002343206A (en) * | 2001-05-17 | 2002-11-29 | Tokai Rika Co Ltd | Diaphragm for pressure switch or the like |
| JP2006161831A (en) * | 2004-12-02 | 2006-06-22 | Toyo Tire & Rubber Co Ltd | Diaphragm and manufacturing method thereof |
| CN201358906Y (en) * | 2009-02-23 | 2009-12-09 | 李建玮 | Diaphragm sheet of pneumatic diaphragm pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB317534A (en) * | 1928-10-30 | 1929-08-22 | Harold William Hughes | Improvements relating to rubber valves, diaphragms, washers and the like |
| JP2003130219A (en) * | 2001-10-29 | 2003-05-08 | Fujikura Rubber Ltd | Manufacturing method for diaphragm |
| CN208041125U (en) * | 2018-01-22 | 2018-11-02 | 江门市大长江集团有限公司 | Motorcycle, fuel pump and its sealing diaphragm |
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| CN108061159A (en) | 2018-05-22 |
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