CN104774410B - A kind of yacht valve mechanism cover sealing ring material and its production technology - Google Patents
A kind of yacht valve mechanism cover sealing ring material and its production technology Download PDFInfo
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- CN104774410B CN104774410B CN201510213081.8A CN201510213081A CN104774410B CN 104774410 B CN104774410 B CN 104774410B CN 201510213081 A CN201510213081 A CN 201510213081A CN 104774410 B CN104774410 B CN 104774410B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of yacht valve mechanism cover sealing ring material and its production technology, belong to engine air cylinder cap sealing ring manufacturing technology field.A kind of yacht valve mechanism cover sealing ring material of the present invention is made up of the raw material of following weight portion：80～120 parts of fluorubber, 5～9 parts of acid-acceptor, 2～6 parts of processing aid, 20～40 parts of packing agent, 2.5～4.5 parts of bisphenol AF/BPP.The technique making yacht valve mechanism cover sealing ring using above material：Knead → park → extrude severing molding → once vulcanize → freeze deburring → post-cure, the yacht valve mechanism cover sealing ring producing is capable of high intensity, low compression set, the easy demoulding, the high temperature resistant, purpose of the performance such as oil resistant, media-resistant.
Description
Technical field
The invention belongs to engine air cylinder cap sealing ring manufacturing technology field is and in particular to a kind of yacht valve mechanism cover is close
Seal material and its production technology.
Background technology
Engine air cylinder cap sealing ring, is the elastic sealing elements being placed between cylinder block and head.Due to cylinder
Can not possibly be definitely smooth between body and cylinder cap, furthermore yacht travels for a long time across the sea, by wave impact degree of overturning very
Big, it is therefore desirable to have high performance valve mechanism cover sealing ring come to prevent gases at high pressure, lubricating oil and cooling water from them it
Between scurry out.It is necessary to ensure that the material of valve mechanism cover sealing ring head gasket will have certain bullet under so harsh working condition
Property, the unevenness of faying face can be compensated, to guarantee to seal, simultaneously high intensity to be had, low compression set, high temperature resistant, oil resistant,
Media-resistant excellent properties.Regular cyclical housing sealing ring material can select acrylate and ethylene-acrylate rubber, and it makes
Aspect of performance：High temperature resistant, media-resistant, ageing-resistant performance do not have fluorubber superior.And import polyfluoroprene cylinder head cover sealing ring exists
Cold runner injection moulding process is adopted on processing technique, shortcoming is that mould and die accuracy is high, mould cost is high, equipment investment is big and mould
Cave number is few, and the price of product certainly will will be caused high.
Chinese Patent Application No. 201210336404.9, the patent documentation of publication date 2012.09.12 discloses a kind of fluorine rubber
Glue elastomeric compound and preparation method thereof, it is (MTN990 white carbon black, inorganic to be filled out by Mooney section fluorubber low in binary, reinforcement system
Material), inhale acid system (activated magnesia, ultra-fine calcium hydroxide), vulcanizing system (BPP, bisphenol AF), the demoulding
The mixings such as agent (Rhein dissipates and/or Brazil wax), multi-functional bis-phenol sulfuration compound auxiliary vulcanizing agent L are made, and gained fluorine kneads
Glue has high tensile strength and percentage elongation, by improving the mobility of sizing material, extends time of scorch, makes sizing material to different systems
Make process environments and vulcanization environment adaptability strengthens, improve the safety of vulcanisation operation, so that the scrappage of product reduces.
The fluororubber compounded rubber of this invention is applied to the industries such as space flight, aviation, automobile, metallurgy, petrochemical industry, electronics.But this invention
Fluororubber compounded rubber lays particular emphasis on high intensity and percentage elongation, and when being applied to yacht valve mechanism cover, service life is not long.
Content of the invention
1. invent technical problem to be solved
For not length, the import polyfluoroprene cylinder head cover sealing ring mould of yacht valve mechanism cover sealing ring service life in prior art
Invest big problem, the invention provides a kind of yacht valve mechanism cover sealing ring material and its production technology.It is capable of giving birth to
It is close that output possesses high intensity, low compression set, the easy demoulding, high temperature resistant, the performance such as oil resistant, media-resistant yacht valve mechanism cover
The purpose of seal.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is：
A kind of yacht valve mechanism cover sealing ring material, is made up of the raw material of following weight portion：80～120 parts of fluorubber, suction
5～9 parts of sour agent, 2～6 parts of processing aid, 20～40 parts of packing agent, 2.5～4.5 parts of bisphenol AF/BPP；Wherein：
Fluorubber is 121 DEG C 73 of Mooney viscosity ML (1+4), the binary glue of Oil repellent 66%；
Acid-acceptor includes the food-grade calcium hydroxide of activated magnesia that activity value is 150 and content 98%；
Processing aid includes organosiloxane class processing aid and Brazil wax；
Packing agent includes low degree of structuration soft carbon N990 and alkalescence modified talc powder Mistron CB；
Bisphenol AF/BPP is hexafluoroisopropylidenyl diphenol and BPP.
Preferably, formed by the raw material components proportioning of following weight portion：Fluorubber 100, activated magnesia 3, calcium hydroxide
4th, organosiloxane class processing aid 2, Brazil wax 2, low degree of structuration soft black 15, alkalescence modified talc powder 15, six
Fluorine diphenol 3, BPP 0.7.
Preferably, organosiloxane class processing aid is WS-280.
A kind of yacht valve mechanism cover sealing ring material produces the technique of sealing ring, comprises the steps：
A, all of raw material is kneaded according to after the weight of formula, and parked 24 hours；
B, a width of 40～50mm strip is become by film forming machine, pass through cold feed extruder growth strip afterwards, recycle
The strip of extrusion is cut into cylindric by high-precision modeling cutting machine；
C, design mould and the plate that feeds intake：Design of Dies is multi-impression mold, and diameter of section is the race glue groove of 1.2mm apart from die cavity
0.5mm, is processed to non-cavity surface fall face, and deburring mode is freezing deburring；
D, one step cure sizing：Cylindrical material base is put in order and feeds intake in plate, mould is opened in sulfuration, will feed intake on plate
Material base accurately puts into die cavity middle, carries out one step cure sizing, and curing temperature is 170 DEG C～175 DEG C, and the time is
400～450s, pressure is 180～200kgf/cm2；
E, unnecessary big overlap is manually torn off by the semi-finished product of one step cure, recycle the freezing trimming equipment will be remaining
Thin-sheet removes；
F, post vulcanization：The sealing ring string on side will be repaiied on special metal rack, set post vulcanization temperature as 225
～235 DEG C, the time is 7～9 hours；
G, the sealing ring after post-cure is tested.
Preferably, the plate that feeds intake in step D is designed as many caves porous shape, the Displacements Distribution such as porous, sliding structure.
Preferably, the plate that feeds intake in step D includes filler plate, location-plate, gathering sill and stuffing hole；Described filler plate and positioning
Plate be in filler plate in upper up-down structure, and in slidingtype connect；Described gathering sill is arranged at filler plate and location-plate side
Position；Described filler hole number is N number of, is distributed on filler plate.
Preferably, the plate that feeds intake in step D also includes handle, locating dowel (3) and detent, and described handle is fixed on filler
The symmetrical two side ends of plate；Described locating dowel has 2, is arranged on the upper surface of location-plate side, with determining that filler plate side has
Position groove fit uses.
Preferably, feed intake in step D and have link slot between stuffing hole in plate.
3. beneficial effect
The technical scheme being provided using the present invention, compared with existing technology, has following remarkable result：
(1) a kind of yacht valve mechanism cover sealing ring material of the present invention, the alkalescence talcous addition of remodeling, produce
Yacht valve mechanism cover sealing ring superior performance, substantially increases the service life of sealing ring；
(2) a kind of yacht valve mechanism cover sealing ring material of the present invention, low degree of structuration soft black and alkalescence are modified sliding
Stone powder presses 1：1 ratio adds, and the yacht valve mechanism cover sealing ring producing has lower compression set, and it is easily de-
Module feature is especially prominent；
(3) a kind of yacht valve mechanism cover sealing ring material of the present invention, the use of WS-280, improve yacht valve mechanism cover
The stripping result of sealing ring；
(4) a kind of yacht valve mechanism cover sealing ring material of the present invention produces the technique of sealing ring, molding vulcanization and
Slidingtype feeds intake the use of plate, simplifies processing technique, equipment, mould, frock input cost are few, yacht valve mechanism cover sealing ring
Cost of manufacture cheap；
(5) a kind of yacht valve mechanism cover sealing ring material of the present invention produces the technique of sealing ring, and porous slidingtype feeds intake
The use of plate, makes the position of sizing material stable, the risk producing scarce material is little；
(6) technique of a kind of yacht valve mechanism cover sealing ring material production sealing ring of the present invention, the plate compact conformation that feeds intake,
Simply, convenient to operation, can effectively prevent sizing material incipient scorch；
(7) a kind of yacht valve mechanism cover sealing ring material of the present invention produces the technique of sealing ring, handle in the plate that feeds intake, fixed
Position post and the setting of detent, make operation simpler and accurate, effectively prevent the waste of sizing material；
(8) a kind of yacht valve mechanism cover sealing ring material of the present invention produces the technique of sealing ring, the setting of link slot, carries
The high concordance of yacht valve mechanism cover sealing ring product, the yacht valve mechanism cover sealing ring steady quality produced；
(9) a kind of yacht valve mechanism cover sealing ring material of the present invention and its production technology, rational formula design and conjunction
Suitable production technology, produces high intensity, low compression set, the easy demoulding, high temperature resistant, oil resistant, medium-resistance excellent
Yacht valve mechanism cover sealing ring, is worthy of popularization.
Brief description
The attached view of the plate that feeds intake in Fig. 1 present invention；
Fig. 2 is the side view of the plate that feeds intake of the present invention.
In figure 1- handle；2- filler plate；3- locating dowel；4- location-plate；5- gathering sill；6- stuffing hole.
Specific embodiment
For further appreciating that present disclosure, the present invention is described in detail in conjunction with the embodiments.
Embodiment 1
A kind of yacht valve mechanism cover sealing ring material of the present embodiment, is made up of the raw material of following weight portion：Fluorubber 80
Part, 5 parts of acid-acceptor, 2 parts of processing aid, 20 parts of packing agent, 2.5 parts of bisphenol AF/BPP；Wherein：
Fluorubber is 121 DEG C 73 of Mooney viscosity ML (1+4), the binary glue of Oil repellent 66%；
Acid-acceptor includes 2 parts of activated magnesia (Nippon Union K. K's production) and the content 98% that activity value is 150
3 parts of food-grade calcium hydroxide (Inoue Lime Industry Co., Ltd's production)；
Processing aid includes 1 part of WS-280 (German Struktol company produces) and Brazil wax (Brazilian one tree public affairs
Department produces) 1 part；
Packing agent includes 10 parts of low degree of structuration soft carbon N990 (Canadian Folium Alangii company produces) and alkalescence is modified sliding
10 parts of stone powder Mistron CB (French IMERYS company produces)；
Bisphenol AF/BPP is 2 parts of hexafluoroisopropylidenyl diphenol (du pont company's production) and BPP
0.5 part of (du pont company's production).
A kind of yacht valve mechanism cover sealing ring material of the present embodiment produces the technique of sealing ring, comprises the steps：
A, above all of raw material is kneaded according to after the weight of formula, and parked 24 hours；
B, a width of 40～50mm strip is become by film forming machine, pass through cold feed extruder growth strip afterwards, recycle
The strip of extrusion is cut into cylindric by high-precision modeling cutting machine；
C, design mould and the plate that feeds intake：Design of Dies is multi-impression mold, and diameter of section is the race glue groove of 1.2mm apart from die cavity
0.5mm, is processed to non-cavity surface fall face, and deburring mode is freezing deburring；As depicted in figs. 1 and 2：The plate that feeds intake includes handle 1, fills out
Flitch 2, locating dowel 3, location-plate 4, gathering sill 5, stuffing hole 6 and detent；It is symmetrical that described handle 1 is fixed on filler plate 2
Two side ends；Described filler plate 2 and location-plate 4 be in filler plate 2 in upper up-down structure, and connect in slidingtype；Described gathering sill 5
It is arranged at filler plate 2 and the position of location-plate 4 side；Described filler hole 6 quantity is 240, is equally distributed in filler plate 2
On；Described locating dowel 3 has 2, is arranged on the upper surface of location-plate 4 side, the detent cooperation having with filler plate 2 side
Use；Link slot is had between stuffing hole 6.
D, one step cure sizing：Cylindrical material base is put in order and feeds intake in plate, mould is opened in sulfuration, will feed intake on plate
Material base accurately puts into die cavity middle, carries out one step cure sizing, and curing temperature is 170 DEG C, and the time is 450s, pressure
Power is 180kgf/cm2；
E, unnecessary big overlap is manually torn off by the semi-finished product of one step cure, recycle the freezing trimming equipment will be remaining
Thin-sheet removes；
F, post vulcanization：The sealing ring string on side will be repaiied on special metal rack, set post vulcanization temperature as 225
DEG C, the time is 7 hours；
G, the sealing ring after post-cure is tested, test result such as following table：
Embodiment 2
A kind of yacht valve mechanism cover sealing ring material of the present embodiment, with embodiment 1, difference is basic formula
Parts by weight are different, are made up of the raw material of following weight portion：100 parts of fluorubber, acid-acceptor 7 parts of (activated magnesia 3 and hydroxides
Calcium 4), 4 parts of processing aid (organosiloxane class processing aid 2 and Brazil wax 2), (low degree of structuration is soft for 30 parts of packing agent
Carbon black 15 and alkalescence modified talc powder 15), bisphenol AF/BPP3.7 part (hexafluoroisopropylidenyl diphenol 3 and benzyl triphenyl phosphonium chloride
Phosphorus 0.7).The alkalescence modified talc powder (Mistron CB) that the present embodiment adopts, mesh number is 4000 mesh, and pH value will not 8～9
Cause to delay sulfation, it has good improvement result to compression set and modulus, integral formula can be reduced simultaneously
Cost；N990 is that particle diameter is big, specific surface area is little and the low white carbon black of degree of structuration, is conducive to the dispersion in polyfluoroprene and improves the demoulding
Property.Activity value is 150 extra light calcined magnesia, and 98% highly purified calcium hydroxide, as acid-acceptor, can fully react fluorine
Change hydrogen, reduce the corrosion to mould and pollution；Processing aid WS-280 and the use of Brazil wax, substantially improve polyfluoroprene
Calendering process, and contribute to the demoulding and sizing material of the one step cure flowing in die cavity.
A kind of yacht valve mechanism cover sealing ring material of the present embodiment produces the technique of sealing ring, the same embodiment of basic step
1, difference is：
D, one step cure sizing：Cylindrical material base is put in order and feeds intake in plate, mould is opened in sulfuration, will feed intake on plate
Material base accurately puts into die cavity middle, carries out one step cure sizing, and curing temperature is 175 DEG C, and the time is 400s, pressure
Power is 200kgf/cm2；
F, post vulcanization：The sealing ring string on side will be repaiied on special metal rack, set post vulcanization temperature as 235
DEG C, the time is 9 hours；
G, the sealing ring after post-cure is tested, test result such as following table：
Embodiment 3
A kind of yacht valve mechanism cover sealing ring material of the present embodiment, with embodiment 1, difference is basic formula
Parts by weight are different, are made up of the raw material of following weight portion：120 parts of fluorubber, acid-acceptor 9 parts of (activated magnesia 4 and hydroxides
Calcium 5), 6 parts of processing aid (organosiloxane class processing aid 3 and Brazil wax 3), (low degree of structuration is soft for 40 parts of packing agent
Carbon black 20 and alkalescence modified talc powder 20), bisphenol AF/BPP4.5 part (hexafluoroisopropylidenyl diphenol 3.5 and benzyltriphenyl phosphonium chlorine
Change phosphorus 1.0.The alkalescence modified talc powder (Mistron CB) that the present embodiment adopts, mesh number is 2000 mesh, and pH value is 9.
A kind of yacht valve mechanism cover sealing ring material of the present embodiment produces the technique of sealing ring, the same embodiment of basic step
2, difference is：
G, the sealing ring after post-cure is tested, test result such as following table：
In conjunction with three test result comparative illustration：The yacht valve mechanism cover sealing ring material proportioning of embodiment 2 and processing work
Skill parameter is optimum selection, and the yacht valve mechanism cover sealing ring of production has high intensity, low compression set, the easy demoulding, resistance to height
The performances such as temperature, oil resistant, media-resistant are optimum.
Example of the present invention is only that the preferred embodiment of the present invention is described, not to present inventive concept and
Scope is defined, on the premise of without departing from design philosophy of the present invention, the technology to the present invention for this area engineers and technicians
Various modifications and improvement that scheme is made, all should fall into protection scope of the present invention, and the technology contents that the present invention is claimed are own
Record in detail in the claims through whole.
Claims (4)
1. a kind of yacht valve mechanism cover sealing ring material, is made up of the raw material of following weight portion：100 parts of fluorubber, acid-acceptor 7
Part, 4 parts of processing aid, 30 parts of packing agent, 3.7 parts of bisphenol AF/BPP；Wherein：
Described fluorubber is 121 DEG C 73 of Mooney viscosity ML (1+4), the binary glue of Oil repellent 66%；
Described acid-acceptor includes 3 parts of 4 parts of food-grade calcium hydroxides with content 98% of activated magnesia that activity value is 150；
Described processing aid includes 2 parts of organosiloxane class processing aid and 2 parts of Brazil wax；
It is 15 parts and alkalescence modified talc powder Mistron CB15 that described packing agent includes low degree of structuration soft carbon N990
Part；
Described bisphenol AF/BPP is 3 parts of hexafluoroisopropylidenyl diphenol and 0.7 part of BPP；
Described organosiloxane class processing aid is WS-280.
2. the yacht valve mechanism cover sealing ring material described in a kind of utilization claim 1 produces the technique of sealing ring, and its feature exists
In comprising the steps：
A, all of raw material is kneaded according to after the weight of formula, and parked 24 hours；
B, a width of 40～50mm strip is become by film forming machine, pass through cold feed extruder growth strip afterwards, recycle high-precision
The strip of extrusion is cut into cylindric by degree molding cutting machine；
C, design mould and the plate that feeds intake：Design of Dies be multi-impression mold, diameter of section be 1.2mm race glue groove apart from die cavity 0.5mm,
Non- cavity surface fall face is processed, deburring mode is freezing deburring；
D, one step cure sizing：Cylindrical material base is put in order and feeds intake in plate, the plate that feeds intake is designed as many caves porous shape, porous
Etc. Displacements Distribution, sliding structure, the plate that feeds intake includes filler plate (2), location-plate (4), gathering sill (5) and stuffing hole (6)；Described
Filler plate (2) and location-plate (4) be in filler plate (2) in upper up-down structure, and connect in slidingtype；Described gathering sill (5) sets
It is placed in filler plate (2) and the position of location-plate (4) side；Described filler hole (6) quantity is N number of, is distributed on filler plate (2)；
The material base feeding intake on plate is put into by mold cavity middle by filler plate (2) and location-plate (4), carries out one step cure fixed
Type, curing temperature is 170 DEG C～175 DEG C, and the time is 400～450s, and pressure is 180～200kgf/cm2；
E, unnecessary big overlap is manually torn off by the semi-finished product of one step cure, recycle freezing trimming equipment little to fly remaining
Side removes；
F, post vulcanization：The sealing ring string on side will have been repaiied on special metal rack, set post vulcanization temperature as 225～
235 DEG C, the time is 7～9 hours；
G, the sealing ring after post-cure is tested.
3. a kind of yacht valve mechanism cover sealing ring material according to claim 2 produces the technique of sealing ring, and its feature exists
In：The plate that feeds intake in step D also includes handle (1), locating dowel (3) and detent, and described handle (1) is fixed on filler plate (2)
Symmetrical two side ends；Described locating dowel (3) has 2, is arranged on the upper surface of location-plate (4) side, opens with filler plate (2) side
Some detents use cooperatively.
4. a kind of yacht valve mechanism cover sealing ring material according to claim 2 produces the technique of sealing ring, and its feature exists
In：Feed intake in step D and have link slot between stuffing hole (6) in plate.
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| CN201510213081.8A CN104774410B (en) | 2015-04-29 | 2015-04-29 | A kind of yacht valve mechanism cover sealing ring material and its production technology |
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| CN201510213081.8A CN104774410B (en) | 2015-04-29 | 2015-04-29 | A kind of yacht valve mechanism cover sealing ring material and its production technology |
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| CN104774410B true CN104774410B (en) | 2017-03-08 |
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| CN110577712A (en) * | 2019-08-02 | 2019-12-17 | 台州恩普密封件有限公司 | High-temperature-resistant and wear-resistant rotary oil seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101153120B (en) * | 2007-08-28 | 2010-06-02 | 扬中市橡胶塑料厂 | Modified fluororubber gross rubber and method of producing the same |
| CN101333324B (en) * | 2008-07-27 | 2011-06-15 | 青岛茂林橡胶制品有限公司 | Rubber compositions for oil seal of rubber framework and method for manufacturing same |
| CN101698735B (en) * | 2009-11-23 | 2011-05-04 | 青岛开世密封工业有限公司 | Fluorocarbon rubber with easy demoulding and tear resistance and preparation method thereof |
| CN101775184B (en) * | 2010-02-03 | 2012-11-21 | 海堡(厦门)橡胶有限公司 | Activated fine fluorine rubber powder and preparation method thereof |
| CN203665754U (en) * | 2013-10-14 | 2014-06-25 | 杭州兴达特种橡胶有限公司 | Feeding tool of vulcanizing machine |
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