CN108895101A - A kind of preparation method of modified silicon rubber elevator brake block - Google Patents
A kind of preparation method of modified silicon rubber elevator brake block Download PDFInfo
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- CN108895101A CN108895101A CN201811033958.5A CN201811033958A CN108895101A CN 108895101 A CN108895101 A CN 108895101A CN 201811033958 A CN201811033958 A CN 201811033958A CN 108895101 A CN108895101 A CN 108895101A
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- silicon rubber
- brake block
- modified silicon
- steel back
- agent
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/045—Bonding
- F16D2069/0466—Bonding chemical, e.g. using adhesives, vulcanising
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
- F16D2069/0425—Attachment methods or devices
- F16D2069/0491—Tools, machines, processes
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0034—Materials; Production methods therefor non-metallic
- F16D2200/0056—Elastomers
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0061—Joining
- F16D2250/0069—Adhesive bonding
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of preparation methods of modified silicon rubber elevator brake block, are related to brake block technical field.The present invention is modified processing to soft graphite, improves the ageing resistance of silicon rubber；Modified soft graphite can solve the problem of nano aluminium oxide, silicon carbide are ineffective in conjunction with silicon rubber, raw material effect is unable to give full play simultaneously, the physical property of silicon rubber be improved, to improve wear-resisting, the ageing resistance of brake block；The present invention makes adhesive form strong bond layer between steel back and friction material by hot press forming technology, greatly simplify processing technology, steel back is equipped with circular aperture simultaneously, molding friction material in aperture, falling off and being broken for friction material can be prevented, to improve the use quality and service life of elevator brake block.
Description
Technical field：
The present invention relates to brake block technical fields, and in particular to a kind of preparation method of modified silicon rubber elevator brake block.
Background technique：
With the development of society, skyscraper and megastore are more and more, become development trend using man lift.Electricity
The safety of ladder is directly related to the life security of the people, and especially elevator safety accident frequently occurs in recent years.Cause such thing
Therefore reason usually have two aspect, be on the one hand electrical control system of elevator reason；On the other hand the reason of being elevator brake block,
The reason of elevator brake block may cause problems be brake block thermal expansion coefficient is big, impact property is poor, brake block is easy to wear,
Fracture etc..
Safety due to elevator brake block directly concerning elevator brake, even if there is contingency in elevator, performance compared with
Good elevator brake block can keep elevator emergency out of service with emergency brake, to avoid the injury of personnel.Currently, with
The frequent generation of more and more elevator accidents, the raising of elevator safety performance become megatrend, and elevator brake block
Performance requirement also become inexorable trend.It would therefore be highly desirable to need to study the low elevator brake of a kind of high-performance, accident rate
Piece.
Silicon rubber be it is a kind of have both inorganic and organic nature macromolecular material, molecular backbone is by silicon atom and oxygen
Atom alternately forms, and side chain is be connected with silicon atom hydrocarbon or replaces hydrocarbon organic group, this group can be methyl,
Unsaturated ethylene alkenyl or other organic groups, this unsaturated molecular structure make silicon rubber have excellent heat-resistant aging and
Weatherable, UV resistant and ozone corrosion.The toughness of strand is larger, and the interaction of molecule interchain is weaker, these knots
Structure feature keeps vulcanized rubber soft and flexible, but physical property is poor.
Summary of the invention：
Technical problem to be solved by the present invention lies in provide a kind of impact resistance, be not easy wear and rupture, excellent physical properties
Elevator brake block preparation method.
The following technical solution is employed for the technical problems to be solved by the invention to realize：
A kind of preparation method of modified silicon rubber elevator brake block, includes the following steps：
(1) steel back pre-processes：Steel back is placed in the sodium carbonate liquor that mass fraction is 1-3% and impregnates 5-15min, then is turned
Enter and impregnate 5-15min in clear water, and is dried at 100-110 DEG C after clear water rinses；
(2) coating of adhesive：Acrylic acid epoxy adhesive is coated in pretreated steel back, and through spontaneous curing or
It is heating and curing at 80-90 DEG C；
(3) silicon rubber is modified：Methyl vinyl silicone rubber is put into mixer the 10-20min that plasticates, enhancing is then added
Agent, activating agent, dispersing agent and anti-aging agent mediate 5-10min in mixer, are cooled in 40 DEG C or less investment two-roll mills；
Vulcanizing agent and fatty alcohol polyoxypropylene ether are added on the double roll mill, it is thin logical primary after being kneaded uniformly, out at thick 3-5 millimeters
Film；With evacuated flat panel vulcanizer heating mould to 150 DEG C, then film is put into die cavity, molding carries out vulcanization 5-10min
After take out product, remove rim charge to get modified silicon rubber；
(4) friction raw material mixture：By modified silicon rubber, phenolic resin, Frication powder, carbonized titanium powder, toughening carbon fiber reinforced by matching
It is more uniform than being put into mixture in batch mixer；
(5) hot-forming：Friction raw material of the mixture after uniform is put into the die cavity of high pressure vulcanizer, and mold is preheated
To 120-140 DEG C, after mold temperature reaches the preheating temperature of setting, then it is coated with the steel back of adhesive and is put into die cavity,
Then hot pressing is carried out, brake block embryonic type is taken out after hot pressing；
(6) vulcanizing treatment：Brake block embryonic type is put into post-cure baking oven, natural cooling after thermally treated solidification, i.e.,
Obtain brake block.
It is uniformly provided with circular aperture on the steel back surface, when hot-forming, friction material can be through small holes, and in aperture
Interior hot-forming, molding friction material can play fixed effect in aperture, and friction material is prevented to be detached from from steel back, with
And the fracture of friction material.
The roller speed ratio of the two-roll mill is 1.2-1.4: 1, mixing time 20-40min.
The preparation method of the reinforcing agent is：Soft graphite is add to deionized water, reflux state is heated to, is kept the temperature
5-10min is stirred, 2,5-dihydroxybenzoic acid then is added and tetraethyl titanate, return stirring 0.5-2h are subsequently added into nanometer
Aluminium oxide and silicon carbide, 80-90 DEG C of stirring 30-50min, are filtered, gained precipitating is washed away with deionized water and dehydrated alcohol while hot
Impurity is sent into 100-110 DEG C of drying box, is dried to constant weight to get reinforcing agent is arrived.
The soft graphite, 2,5- dihydroxy-benzoic acid, tetraethyl titanate, nano aluminium oxide, silicon carbide mass ratio be
1-5：1-5：0.1-0.2：1-3：1-3.
The activating agent is selected from zinc oxide or stearic acid.
The dispersing agent is polyethylene glycol 400.
The anti-aging agent is selected from ketone amines antioxidants or diphenylamine anti-aging agent.
The vulcanizing agent is benzoyl peroxide.
The methyl vinyl silicone rubber, reinforcing agent, activating agent, dispersing agent, anti-aging agent, vulcanizing agent, fatty alcohol polyoxy third
The mass ratio of alkene ether is 50-70：1-5：1-5：5-10：1-5：1-5：5-10.
The modified silicon rubber, phenolic resin, Frication powder, carbonized titanium powder, toughening carbon fiber reinforced mass ratio are 60-100：
40-60：5-10：1-5：1-5.
The hot pressing condition is 160-180 DEG C of hot pressing temperature, hot pressing pressure 20-40MPa, hot pressing time 5-20min.
The heat treatment for solidification condition is 120-140 DEG C of heat treatment temperature, heat treatment time 2-5h.
Soft graphite be by natural graphite scale through intercalation, washing, drying, high temperature puffing obtain one kind it is loose porous
Vermiform substance also has day other than having the excellent performances such as the cold-hot of natural graphite itself, corrosion-resistant, self-lubricating
The spies such as the unexistent softness of right graphite, compression resilience, adsorptivity, ecological environment harmony, biocompatibility, radiation resistance
Property.
The crystal form of nano aluminium oxide is γ-Al2O3, even particle size distribution, purity is high, the strengthening and toughening as silicon rubber,
It can be improved compactness, finish, cool-hot fatigue, the fracture toughness of silicon rubber.
Reaction principle according to the present invention is as follows：
(1) intermolecular esterification occurs for 2,5-dihydroxybenzoic acid, together under the action of catalyst tetraethyl titanate
When molecule in extra hydroxyl hydrogen bond action can occur link together, improve the stability of compound, what esterification generated
Substance is adsorbed in the lamella of soft graphite, improves soft graphite to the adsorptivity of inorganic material and to the affine of organic material
Property, while modified soft graphite has certain gain effect to the ageing resistance of silicon rubber；Nano aluminium oxide, silicon carbide can
To promote the hardness and wearability of silicon rubber, by the carrier function of soft graphite, can solve nano aluminium oxide, silicon carbide with
The problem of silicon rubber combination effect difference, gives full play to the function and effect of each component raw material；
(2) vulcanizing agent benzoyl peroxide is also the initiator of polymerization reaction simultaneously, is carried out in methyl vinyl silicone rubber
During vulcanization, with the part unsaturated bond in silicon rubber polyaddition reaction can occur for fatty alcohol polyoxypropylene ether, significantly
Improve the physical property of methyl vinyl silicone rubber.
The beneficial effects of the invention are as follows：
(1) present invention is modified processing to soft graphite, improves the ageing resistance of silicon rubber；It is modified soft simultaneously
Property graphite can solve that nano aluminium oxide, silicon carbide is ineffective in conjunction with silicon rubber, raw material effect is unable to give full play asks
Topic, improves stretching, the bending strength of silicon rubber, to further promote wear-resisting, the anti-aging property of brake block；
(2) benzoyl peroxide is also the initiator of polymerization reaction simultaneously, is vulcanized in methyl vinyl silicone rubber
In the process, with the part unsaturated bond in silicon rubber polyaddition reaction can occur for fatty alcohol polyoxypropylene ether, be obviously improved
The physical properties such as tensile strength, the impact resistant strength of methyl vinyl silicone rubber, and then enhance using it as the brake of raw material preparation
The polishing machine and shear strength of vehicle piece；
(3) present invention makes adhesive form strong bond layer between steel back and friction material by hot press forming technology,
Processing technology is greatly simplified, while steel back is equipped with circular aperture, molding friction material in aperture can prevent friction material
Fall off and be broken, to improve the use quality and service life of made elevator brake block.
Specific embodiment：
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Specific embodiment is closed, the present invention is further explained.
In specific embodiment：Ten thousand surfactants in fatty alcohol polyoxypropylene ether SPO 30；
Praise year in Frication powder Xiamen.
Embodiment 1
(1) steel back pre-processes：Steel back is placed in the sodium carbonate liquor that mass fraction is 1% and impregnates 5min, then is transferred to clear
10min is impregnated in water, and is dried at 100-110 DEG C after clear water rinses；
(2) coating of adhesive：Acrylic acid epoxy adhesive is coated in pretreated steel back, and through spontaneous curing or
It is heating and curing at 80-90 DEG C；
(3) silicon rubber is modified：65kg methyl vinyl silicone rubber is put into mixer the 10min that plasticates, 2kg is then added
Reinforcing agent, 2kg zinc oxide, 5kg polyethylene glycol 400 and 3kg ketone amines antioxidants mediate 5min in mixer, are cooled to 40 DEG C
It puts into two-roll mill below；2kg vulcanizing agent and 6kg fatty alcohol polyoxypropylene ether are added on the double roll mill, is kneaded equal
Thin logical primary after even, out at thick 3-5 millimeters of film, the roller speed ratio of two-roll mill is 1.2: 1, mixing time 20min；
With evacuated flat panel vulcanizer heating mould to 150 DEG C, then film is put into die cavity, molding takes out system after carrying out vulcanization 5min
Product remove rim charge to get modified silicon rubber；
(4) friction raw material mixture：By 60kg modified silicon rubber, 45kg phenolic resin, 6kg Frication powder, 2kg carbonized titanium powder,
2kg is toughening carbon fiber reinforced to be put into batch mixer mixture uniformly according to the ratio；
(5) hot-forming：Friction raw material of the mixture after uniform is put into the die cavity of high pressure vulcanizer, and mold is preheated
To 120 DEG C, after mold temperature reaches the preheating temperature of setting, then it is coated with the steel back of adhesive and is put into die cavity, then
Hot pressing is carried out, 160 DEG C of hot pressing temperature, hot pressing pressure 20MPa, hot pressing time 10min take out brake block embryonic type after hot pressing；
(6) vulcanizing treatment：Brake block embryonic type is put into post-cure baking oven, natural cooling after thermally treated solidification, heat
125 DEG C for the treatment of temperature, heat treatment time 3h are to get brake block.
The preparation of reinforcing agent：2.5kg soft graphite is add to deionized water, reflux state, insulated and stirred are heated to
6min, is then added 2kg2,5- dihydroxy-benzoic acid and 0.1kg tetraethyl titanate, and return stirring 1h is subsequently added into 1.5kg and receives
Rice aluminium oxide and 1kg silicon carbide, 85 DEG C of stirring 35min are filtered while hot, and gained precipitating deionized water and dehydrated alcohol wash away miscellaneous
Matter is sent into 100-110 DEG C of drying box, is dried to constant weight to get reinforcing agent is arrived.
Embodiment 2
(1) steel back pre-processes：Steel back is placed in the sodium carbonate liquor that mass fraction is 1% and impregnates 5min, then is transferred to clear
10min is impregnated in water, and is dried at 100-110 DEG C after clear water rinses；
(2) coating of adhesive：Acrylic acid epoxy adhesive is coated in pretreated steel back, and through spontaneous curing or
It is heating and curing at 80-90 DEG C；
(3) silicon rubber is modified：65kg methyl vinyl silicone rubber is put into mixer the 10min that plasticates, 2kg is then added
Reinforcing agent, 2kg zinc oxide, 5kg polyethylene glycol 400 and 3kg ketone amines antioxidants mediate 5min in mixer, are cooled to 40 DEG C
It puts into two-roll mill below；2kg vulcanizing agent and 6kg fatty alcohol polyoxypropylene ether are added on the double roll mill, is kneaded equal
Thin logical primary after even, out at thick 3-5 millimeters of film, the roller speed ratio of two-roll mill is 1.2: 1, mixing time 20min；
With evacuated flat panel vulcanizer heating mould to 150 DEG C, then film is put into die cavity, molding takes out system after carrying out vulcanization 5min
Product remove rim charge to get modified silicon rubber；
(4) friction raw material mixture：By 60kg modified silicon rubber, 45kg phenolic resin, 6kg Frication powder, 2kg carbonized titanium powder,
2kg is toughening carbon fiber reinforced to be put into batch mixer mixture uniformly according to the ratio；
(5) hot-forming：Friction raw material of the mixture after uniform is put into the die cavity of high pressure vulcanizer, and mold is preheated
To 120 DEG C, after mold temperature reaches the preheating temperature of setting, then it is coated with the steel back of adhesive and is put into die cavity, then
Hot pressing is carried out, 160 DEG C of hot pressing temperature, hot pressing pressure 20MPa, hot pressing time 10min take out brake block embryonic type after hot pressing；
(6) vulcanizing treatment：Brake block embryonic type is put into post-cure baking oven, natural cooling after thermally treated solidification, heat
125 DEG C for the treatment of temperature, heat treatment time 3h are to get brake block.
The preparation of reinforcing agent：2.5kg soft graphite is add to deionized water, reflux state, insulated and stirred are heated to
6min, is then added 2kg2,5- dihydroxy-benzoic acid and 0.1kg tetraethyl titanate, and return stirring 1h is subsequently added into 1.5kg and receives
Rice aluminium oxide and 1kg silicon carbide, 85 DEG C of stirring 35min are filtered while hot, and gained precipitating deionized water and dehydrated alcohol wash away miscellaneous
Matter is sent into 100-110 DEG C of drying box, is dried to constant weight to get reinforcing agent is arrived.
Reference examples 1
(1) steel back pre-processes：Steel back is placed in the sodium carbonate liquor that mass fraction is 1% and impregnates 5min, then is transferred to clear
10min is impregnated in water, and is dried at 100-110 DEG C after clear water rinses；
(2) coating of adhesive：Acrylic acid epoxy adhesive is coated in pretreated steel back, and through spontaneous curing or
It is heating and curing at 80-90 DEG C；
(3) silicon rubber is modified：65kg methyl vinyl silicone rubber is put into mixer the 10min that plasticates, 2kg is then added
Reinforcing agent, 2kg zinc oxide, 5kg polyethylene glycol 400 and 3kg ketone amines antioxidants mediate 5min in mixer, are cooled to 40 DEG C
It puts into two-roll mill below；2kg vulcanizing agent and 6kg fatty alcohol polyoxypropylene ether are added on the double roll mill, is kneaded equal
Thin logical primary after even, out at thick 3-5 millimeters of film, the roller speed ratio of two-roll mill is 1.2: 1, mixing time 20min；
With evacuated flat panel vulcanizer heating mould to 150 DEG C, then film is put into die cavity, molding takes out system after carrying out vulcanization 5min
Product remove rim charge to get modified silicon rubber；
(4) friction raw material mixture：By 60kg modified silicon rubber, 45kg phenolic resin, 6kg Frication powder, 2kg carbonized titanium powder,
2kg is toughening carbon fiber reinforced to be put into batch mixer mixture uniformly according to the ratio；
(5) hot-forming：Friction raw material of the mixture after uniform is put into the die cavity of high pressure vulcanizer, and mold is preheated
To 120 DEG C, after mold temperature reaches the preheating temperature of setting, then it is coated with the steel back of adhesive and is put into die cavity, then
Hot pressing is carried out, 160 DEG C of hot pressing temperature, hot pressing pressure 20MPa, hot pressing time 10min take out brake block embryonic type after hot pressing；
(6) vulcanizing treatment：Brake block embryonic type is put into post-cure baking oven, natural cooling after thermally treated solidification, heat
125 DEG C for the treatment of temperature, heat treatment time 3h are to get brake block.
The preparation of reinforcing agent：2.5kg soft graphite is add to deionized water, reflux state, insulated and stirred are heated to
Then 0.1kg tetraethyl titanate is added in 6min, return stirring 1h is subsequently added into 1.5kg nano aluminium oxide and 1kg silicon carbide, and 85
DEG C stirring 35min, is filtered, gained precipitating deionized water and dehydrated alcohol wash away impurity, are sent into 100-110 DEG C of drying box while hot
In, it dries to constant weight to get reinforcing agent is arrived.
Reference examples 2
(1) steel back pre-processes：Steel back is placed in the sodium carbonate liquor that mass fraction is 1% and impregnates 5min, then is transferred to clear
10min is impregnated in water, and is dried at 100-110 DEG C after clear water rinses；
(2) coating of adhesive：Acrylic acid epoxy adhesive is coated in pretreated steel back, and through spontaneous curing or
It is heating and curing at 80-90 DEG C；
(3) silicon rubber is modified：65kg methyl vinyl silicone rubber is put into mixer the 10min that plasticates, 2kg is then added
Reinforcing agent, 2kg zinc oxide, 5kg polyethylene glycol 400 and 3kg ketone amines antioxidants mediate 5min in mixer, are cooled to 40 DEG C
It puts into two-roll mill below；2kg vulcanizing agent and 6kg fatty alcohol polyoxypropylene ether are added on the double roll mill, is kneaded equal
Thin logical primary after even, out at thick 3-5 millimeters of film, the roller speed ratio of two-roll mill is 1.2: 1, mixing time 20min；
With evacuated flat panel vulcanizer heating mould to 150 DEG C, then film is put into die cavity, molding takes out system after carrying out vulcanization 5min
Product remove rim charge to get modified silicon rubber；
(4) friction raw material mixture：By 60kg modified silicon rubber, 45kg phenolic resin, 6kg Frication powder, 2kg carbonized titanium powder,
2kg is toughening carbon fiber reinforced to be put into batch mixer mixture uniformly according to the ratio；
(5) hot-forming：Friction raw material of the mixture after uniform is put into the die cavity of high pressure vulcanizer, and mold is preheated
To 120 DEG C, after mold temperature reaches the preheating temperature of setting, then it is coated with the steel back of adhesive and is put into die cavity, then
Hot pressing is carried out, 160 DEG C of hot pressing temperature, hot pressing pressure 20MPa, hot pressing time 10min take out brake block embryonic type after hot pressing；
(6) vulcanizing treatment：Brake block embryonic type is put into post-cure baking oven, natural cooling after thermally treated solidification, heat
125 DEG C for the treatment of temperature, heat treatment time 3h are to get brake block.
Reinforcing agent：Nano aluminium oxide and silicon carbide, mass ratio 1：1.
Reference examples 3
(1) steel back pre-processes：Steel back is placed in the sodium carbonate liquor that mass fraction is 1% and impregnates 5min, then is transferred to clear
10min is impregnated in water, and is dried at 100-110 DEG C after clear water rinses；
(2) coating of adhesive：Acrylic acid epoxy adhesive is coated in pretreated steel back, and through spontaneous curing or
It is heating and curing at 80-90 DEG C；
(3) silicon rubber is modified：65kg methyl vinyl silicone rubber is put into mixer the 10min that plasticates, 2kg is then added
Reinforcing agent, 2kg zinc oxide, 5kg polyethylene glycol 400 and 3kg ketone amines antioxidants mediate 5min in mixer, are cooled to 40 DEG C
It puts into two-roll mill below；2kg vulcanizing agent is added on the double roll mill, it is thin logical primary after being kneaded uniformly, out at thick 3-5
The film of millimeter, the roller speed ratio of two-roll mill are 1.2: 1, mixing time 20min；With evacuated flat panel vulcanizer heated mould
Then tool is put into film in die cavity to 150 DEG C, molding takes out product after carrying out vulcanization 5min, removes rim charge to get modified silicon
Rubber；
(4) friction raw material mixture：By 60kg modified silicon rubber, 45kg phenolic resin, 6kg Frication powder, 2kg carbonized titanium powder,
2kg is toughening carbon fiber reinforced to be put into batch mixer mixture uniformly according to the ratio；
(5) hot-forming：Friction raw material of the mixture after uniform is put into the die cavity of high pressure vulcanizer, and mold is preheated
To 120 DEG C, after mold temperature reaches the preheating temperature of setting, then it is coated with the steel back of adhesive and is put into die cavity, then
Hot pressing is carried out, 160 DEG C of hot pressing temperature, hot pressing pressure 20MPa, hot pressing time 10min take out brake block embryonic type after hot pressing；
(6) vulcanizing treatment：Brake block embryonic type is put into post-cure baking oven, natural cooling after thermally treated solidification, heat
125 DEG C for the treatment of temperature, heat treatment time 3h are to get brake block.
The preparation of reinforcing agent：2.5kg soft graphite is add to deionized water, reflux state, insulated and stirred are heated to
6min, is then added 2kg2,5- dihydroxy-benzoic acid and 0.1kg tetraethyl titanate, and return stirring 1h is subsequently added into 1.5kg and receives
Rice aluminium oxide and 1kg silicon carbide, 85 DEG C of stirring 35min are filtered while hot, and gained precipitating deionized water and dehydrated alcohol wash away miscellaneous
Matter is sent into 100-110 DEG C of drying box, is dried to constant weight to get reinforcing agent is arrived.
Embodiment 3
Based on embodiment 1, setting does not add the reference examples 1 of 2,5-dihydroxybenzoic acid, with nano aluminium oxide and carbon
SiClx is the reference examples 2 of reinforcing agent, the reference examples 3 for not adding fatty alcohol polyoxypropylene ether.
Elevator brake block is prepared using embodiment 1-2, reference examples 1-3, and the performance of brake block is measured, as a result such as
Shown in table 1.
The performance test of 1 brake block of table
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of preparation method of modified silicon rubber elevator brake block, which is characterized in that include the following steps：
(1) steel back pre-processes：Steel back is placed in the sodium carbonate liquor that mass fraction is 1-3% and impregnates 5-15min, then is transferred to clear
5-15min is impregnated in water, and is dried at 100-110 DEG C after clear water rinses；
(2) coating of adhesive：To in pretreated steel back coat acrylic acid epoxy adhesive, and through spontaneous curing or in
It is heating and curing at 80-90 DEG C；
(3) silicon rubber is modified：Methyl vinyl silicone rubber is put into mixer and is plasticated 10-20min, be then added reinforcing agent,
Activating agent, dispersing agent and anti-aging agent mediate 5-10min in mixer, are cooled in 40 DEG C or less investment two-roll mills；?
Vulcanizing agent and fatty alcohol polyoxypropylene ether are added in two-roll mill, it is thin logical primary after being kneaded uniformly, out at thick 3-5 millimeters of glue
Piece；With evacuated flat panel vulcanizer heating mould to 150 DEG C, then film is put into die cavity, after molding carries out vulcanization 5-10min
Product is taken out, removes rim charge to get modified silicon rubber；
(4) friction raw material mixture：By modified silicon rubber, phenolic resin, Frication powder, carbonized titanium powder, toughening carbon fiber reinforced put according to the ratio
It is uniform to enter mixture in batch mixer；
(5) hot-forming：Friction raw material of the mixture after uniform is put into the die cavity of high pressure vulcanizer, and mold is preheated to
It 120-140 DEG C, after mold temperature reaches the preheating temperature of setting, then is coated with the steel back of adhesive and is put into die cavity, so
After carry out hot pressing, after hot pressing take out brake block embryonic type；
(6) vulcanizing treatment：Brake block embryonic type is put into post-cure baking oven, natural cooling is after thermally treated solidification to get brake
Vehicle piece.
2. the preparation method of modified silicon rubber elevator brake block according to claim 1, it is characterised in that：The steel back table
Circular aperture is uniformly provided on face.
3. the preparation method of modified silicon rubber elevator brake block according to claim 1, it is characterised in that：The double roller is opened
The roller speed ratio of mill is 1.2-1.4: 1, mixing time 20-40min.
4. the preparation method of modified silicon rubber elevator brake block according to claim 1, it is characterised in that：The methyl second
Alkenyl silicon rubber, reinforcing agent, activating agent, dispersing agent, anti-aging agent, vulcanizing agent, fatty alcohol polyoxypropylene ether mass ratio be 50-
70：1-5：1-5：5-10：1-5：1-5：5-10.
5. the preparation method of modified silicon rubber elevator brake block according to claim 1, it is characterised in that：The modified silicon
Rubber, phenolic resin, Frication powder, carbonized titanium powder, toughening carbon fiber reinforced mass ratio are 60-100：40-60：5-10：1-5：1-5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114251378A (en) * | 2021-12-24 | 2022-03-29 | 故城县风动摩擦密封材料有限公司 | Hot die forging press clutch friction disc and friction disc sticking and riveting process |
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