CN1062692A - The production method of rubber polyurethane compound tyre and device - Google Patents
The production method of rubber polyurethane compound tyre and device Download PDFInfo
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- CN1062692A CN1062692A CN 90110295 CN90110295A CN1062692A CN 1062692 A CN1062692 A CN 1062692A CN 90110295 CN90110295 CN 90110295 CN 90110295 A CN90110295 A CN 90110295A CN 1062692 A CN1062692 A CN 1062692A
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Abstract
A kind of production method and device that relates to rubber polyurethane compound tyre.It is with new, old rubber wheel tyre carcase surface after treatment, puts into to vacuumize after mould is heated, and will fill in the vacuum die cavity that is brushed with releasing agent through the liquid polyurethane of the degassing of heating simultaneously, is finished product through pressurization, pressurize, slaking, cooling and the demoulding.Used device comprises: batch mixing injection tank body, notes plug, hydraulic press, stirring arm, electric hot plate, mould and undercarriage.Through the present invention is base with the rubber jar, and CPU is the polyurethane or the composite tyre after hanging top, renovation of tyre surface, is equivalent to 5-10 times of the new tire of rubber service life.
Description
The present invention relates to a kind of production method and device of rubber polyurethane compound tyre, is base with new, old rubber tyre body particularly, the compound long-lived tire that polyurethane tread vacuum infusion molding new technology is produced.
At present, only be 0.5 to 1 year the service life of a new tire of rubber, in the service life of motor vehicles, often needs to change new tyre 5 to 6 times.Therefore, billions of the junked tires in home and abroad cause disaster because of depositing nowhere.The above-mentioned tire of scrapping, just most because of treadwear, its tire housing is still excellent, causes the surplus value of wheel tyre carcase big, and the too small contradiction of tyre surface use value.For this reason, successively be developed into the method and apparatus of repairing and upgrading tire both at home and abroad.Thermoplasticity TPU solvent method: as No. 00086942, U.S. Pat " tire of motor vehicle upgrades or repairs " (synthetic thermosol polyurethane), it be with thermoplastic polyurethane (TPU) solid heating for dissolving in organic solvent, make it form pastel, be applied to surface of tyre after treatment, treat to be formed with certain flexible polyurethane coating behind muddy of the solvent.This kind method one particularly makes the dissolving of thermoplastic polyurethane (TPU) solid owing to adopt a large amount of organic solvents under heating condition, if add thermal agitation with open containers, then can cause severe environmental pollution, and inflammable and explosive, has also damaged operator's health simultaneously; It causes that brushing is too thick to cause the raw material waste of running off two because solvent all gets product after the volatilization, too thinly is difficult to reach the intrinsic physical property of tire again; Its three it be raw material to be synthesized-the TPU liquid of OH end-blocking, and then irritate the slabbing thing, become solid through cooling, through pulverizing or extruding pelletization, dry back adds organic solvent, is finished product through heating, stirring, dissolving, brushing and drying again, complex technical process is difficult for grasping, and dangerous.It four is thermoplasticity TPU solvent methods, although wide application mostly is used for the thin product of coating, solids content generally is no more than 30%, otherwise viscosity is excessive can't levelling and construction, or if do not adopt vacuum brushing meeting to bring a large amount of bubbles in construction, influences quality.In sum, this kind method complex process is difficult for grasping; Contaminated environment, and dangerous; The coating uneven distribution, properties of product are poor; Almost can't realize producing in enormous quantities, be difficult to promote the use of.Adhesive method: as No. 00569192, U.S. Pat " tyre rebuilding is repaired the synthetic cold work hardening plastic cement of secondary " (is the adhesive polyurethane synthetic rubber of base-material with polyurethane binder), it is through surface treatment with old tire, put into mould and filled with polyurethane foam at room temperature, the pressurization that need not to heat is promptly curable.This method first is done tyre surface with adhesive, must cause cost too high, and the user is difficult to accept, and has both made binder performance good, but totally has been difficult to satisfy the needs of tire proper property; It is two from the polyurethane elastomer angle, and cold-curing technology is worthless, because of old tire after treatment, must ingress of air, particularly humid air, as heat drying and protect heat, will inevitably make tyre surface have hydrone, and in water and the polyurethane-the NCO group very easily reacts and generates CO
2Gas, so just caused and accompanied between old tire and the polyurethane elastomer and little many again micropore bubbles, and these image of bubble separation layers are the same, old tyre surface and elastomer are separated, particularly when tire uses, because friction generates heat with ground, minute bubbles are met heat and are splashed bloated, bubble merge to become big after rolling, and causes between the interface adhesion strength and cut from intensity seriously to descend, and can cause the carcass separation, hulling when serious.Its three cold-curings technology, the curing time is long, if the time that will shorten must add catalyst, causes paying reaction and increases, and the elastomer overall performance degenerates.Said method cost height, poor properties, the technology guaranteed conditions is insufficient, is difficult to apply.
It is short, simple to the purpose of this invention is to provide a kind of technological process, the product applicability is strong, can be continuously produced, not only can produce with the rubber tyre carcase is base, CPU is the long-lived tire of the polyurethane of tyre surface, simultaneously also can adopt junked tire after treatment, produce the production method and the device of the rubber polyurethane compound tyre of the long-lived tire of polyurethane renovation regeneration.
Main points of the present invention are that new or old rubber wheel tyre carcase surface finish is exposed the new tyre surface of being with burr, putting into punching block is heated to 100～140 ℃ and goes out stove evacuation, 80～90 ℃ of liquid polyurethane raw materials that are heated to that mix and through outgasing are poured in the vacuum die cavity that is brushed with releasing agent, wait to fill 0.1～0.3 ° of MPa of back pressurization, and pressurize goes into 100～130 ℃ of constant temperature ovens after slaking in 4～6 hours, and cooling, the demoulding are finished product.
The selection of urethane raw used in the present invention:
1, polyesterols (PA) can be a secondary hydroxyl line style ethylene glycol adipate Mn(mean molecule quantity) 1500～2000;
2, isocyanates can be 4,4 methyl diphenylene diisocyanates (MDI).
More than two kinds of raw materials are domestic that manufacturer all arranged, annual production is easily bought for several ten thousand tons, and the reason of selecting MDI for use is that molecular weight is big, symmetry is strong, and the product mechanical strength is good, it should be noted the control of MDI addition, the control of free cyano acid root-NCO content just, when-when NCO increases, except that percentage elongation reduces, other performance is improved, when-percentage elongation increased when NCO content descended, and other performance reduces more serious, and recording the best-NCO content through up to a hundred tests is all can adopt between 4～6%.
3, the selection of chain extender: thermosetting filling polyurethane (CPU) rule is mostly made chain extender with alcohol as mostly adopt amine chain extender (MOCA etc.) with TDI when adopting MDI.The alcohols that can make chain extender is a lot, as propane diols, ethylene glycol, one contract propane diols, diethylene glycol or the like.The present invention selects ethylene glycol, learn that through test ethylene glycol does the elastomer of chain extender, set deformation volume is minimum, only have 3～5%, and general rubber for tire set deformation volume reaches 35～40%, in addition, and the elastomer of ethylene glycol chain extension, hysteresis is little, temperature rise is low, and 30～50% of connection agent total amount handed over, expanded to content should.
4, the selection of crosslinking agent: utilize the trimethylolpropane of trifunctional or glycerine etc. to make crosslinking agent in the CPU elastomer, make the cross-linked structure that contains some in the elastomer, can change its elastomeric some physical property, particularly improve thermal stability, this point is particularly important to tire, but the percentage composition of the control degree of cross linking is also very important.If too high levels or the low excessively variation that all influences physical properties such as elastomer tensile strength, extension at break, modulus, hardness, tearing strength.It is considered herein that content should all can in handing over, expand connection agent total amount 50～70% intervals.The approach that reaches certain degree of cross linking has 2 points, and one is selected the polyesterols that has certain side group segment for use; It two is to adopt crosslinking agent, and the present invention adopts the second method control degree of cross linking.
Production process:
Constant temperature oven
75～85 ℃ of prepolymer temperature
100～140 ℃ of mold temperatures
Vacuum 200～-800KPa
The urethane raw preparation:
Polyesterols (PA) Mn1500～2,000 100 weight portions
MDI free-NCO content 4～6%
Ethylene glycol (chain extender) accounts for expansion, crosslinking agent total amount 30～50%
Trimethylolpropane or glycerine (cross linking agent) account for 50～70% of expansion, crosslinking agent total amount
Expand correlate 85～95%
Carbodiimides (waterproofing agent) 2～5%
Carbon black 2～5%
Physical property:
Breaking strength 200～260Kg/cm
2
Pull apart elongation 550～600%
Permanent deformation 3～5%
Hardness Shao Shi A 60～70
Density 1.28～1.32g/cm
3
Abrasion (Akron) cm
3/ 1.61km 0.03
The invention provides a kind of reacting and produce the method for polyurethane elastomer, can adopt full prepolymer method or intend prepolymer method by isocyanates, polyalcohol and chain extender one.No matter adopt above-mentioned the sort of method to do performed polymer, all require reactor temperature constant, stir, particularly after chain extender adds, owing to be subjected to the restriction of mixing time, must stir at short notice, otherwise elastomeric different parts has different hardness, physical property differs greatly.
PA is adipate glycol 1.2 propylene glycol ester polyalcohols, and normal temperature for white or Off-white solid, can use after dissolving dehydration down.MDI also is a white solid, presses the recipe calculation value through dissolving (40～50 ℃ of temperature), and can add reactor after accurate measurement, stirs while vacuumizing.The purpose that vacuumizes is to prevent air, particularly the existence of humid air and increase unfavorable pair of reaction.Mixture needs to finish prepolymerization reaction under 75～85 ℃, as make full performed polymer and must control the content of free-NCO well 4～6%, also to accurately control when do intending performed polymer-content of NCO, generally require the reaction time to get final product at 2～3 hours, do not removing under the vacuum condition then, (vacuumizing the place) sucks the subsidy material.Above-mentioned prescription provides and does not add or add trace catalyst T-12, and this will decide according to operator's qualification and productivity effect, if require demould time short, not influencing on the elastomer physical property basis, can add catalyst in right amount.
The control main points:
1, the reactant volume must not surpass 2/3 of reactor volume.
2, total overall reaction is all carried out under stirring, heating, vacuum condition.
3, all feed intake and require accurate measurement.
4, PA dissolves before dehydration back adds MDI, and temperature must not surpass 60 ℃, (will emit reaction heat when adding MDI, the anxious brush of temperature of charge is raise be difficult to control).
5, prepolymer viscosity is relevant with factors such as PA water content, reactor volume, stirring revolution, temperature height.
The present invention mixes secondary, pour into and merge into the mixed once perfusion, has simplified process conditions; Since the vacuum outgas of raw material elder generation, and under vacuum condition, be full of mould, solved sneaking into of humid air.Pressurization and pressurize had increased the raw material packing, and the bonding force of liquid material and tyre surface are much improved until curing after mould was filled, and had increased the mechanical strength and the performance of tyre surface; For reparation, the renovation of the junked tires of abandonment provide a kind of new method and device in a large number; The tyre life that the present invention produces is equivalent to 5～10 times of rubber tyre, has improved the economic benefit that motor vehicle uses; Also can be a large amount of foreign exchanges that country reduces the annual payment of import rubber.
Below with reference to accompanying drawing the production method device that the present invention produces the 825-16 rubber polyurethane compound tyre is described in further detail.
Accompanying drawing is produced the rubber polyurethane compound tyre schematic representation of apparatus for the present invention.
Earlier old 825-16 rubber tyre (6) surface finish is exposed the new tyre surface of being with burr, is loaded on level and presents in the sealed mold (5) of 15～miter angle, go into stove be heated to 100～140 ℃ standby.Carbon black 500 gram drying and screening are sneaked in adipate glycol 1.2 propylene glycol esters (PA) that 10kg dissolves after dehydration, add in the batch mixing injector cylinder body (13) of double as reactor, the discharging valve (18) that will be loaded on cylinder body (13) bottom is in advance closed, 4.4 also add in the cylinder body (13) after methyl diphenylene diisocyanate (MDI) the 2.9kg dissolving, start the interior stirring arm (14) of cylinder body (13) by motor (8), and connect vavuum pump and vacuumize by being located at vacuum orifice (charge door) (10) on the cylinder cap (12), (11) be window, and be heated to 80～85 ℃ by the control of the thermocouple (9) that is loaded on cylinder body (13) top and electric hot plate (15), and insulation was done performed polymer 1.5～2.5 hours, under vacuum condition, once all add the subsidy material by charge door (10): chain extender ethylene glycol 150g, crosslinking agent glycerine 230g, waterproofing agent carbodiimides 500g, catalyst two laurate two J base tin (T-12) 10g, and maintenance vacuum (200～800KPa), be strictly on guard against that into air stirred 5～10 minutes, remove vacuum and drive cylinder cap (12) down, adjust adjusting screw (2), make it annotate plug (1) to injecting cylinder body (13) upper entrance, gas valve (4) on the unlatching notes plugs (1) is exitted and is started hydraulic press (3), slowly will annotate plug (1) and be depressed into liquid material plane valve-off (4), the notes plug of being made by polyurethane material (1) is interference fit with batch mixing cylinder body (13).In said process, gas in mould (5) cavity is connect vavuum pump by the valve (7) on the mould to vacuumize, be the valve (7) of opening mold upper end and the valve (16) of lower end, sebific duct (17) connects valve (16) and valve (18), vacuumize the back and close valve (7) guarantor notes vacuum, open the discharging valve (18) of cylinder body (13) bottom simultaneously and start hydraulic press (3) slowly with the liquid charging stock pressure injection in die cavity, after treating that die cavity is full of raw material, hydraulic press (3) supercharging 0.1～0.3MPa, shut off valve (16) drop (19), mould (5) are gone into stove and are heated to after 100～130 ℃ of constant temperature 4-6 hours and come out of the stove, the demoulding, check, thermalization again.
Claims (5)
1, a kind of production method of rubber polyurethane compound tyre, put into the mould filled with polyurethane foam with old rubber tyre through surface treatment, through cold curing, retreads are made in the demoulding, the invention is characterized in: expose the new tyre surface of being with burr with new or old rubber wheel tyre carcase surface finish, putting into mould is heated to 100～140 ℃ and goes out stove evacuation, with mix and through the degassing 80～90 ℃ of liquid polyurethane raw materials that are heated to pour in the vacuum die cavity that is brushed with releasing agent, wait to fill back pressurization 0.1～0.3MPa, and pressurize is gone into 100～130 ℃ of constant temperature ovens after slaking in 4～6 hours, cooling, the demoulding is finished product.
2, according to the production method of claim 1, it is characterized in that the liquid polyurethane raw material is that the MDI that the carbon black drying and screening is sneaked among the PA that quantitatively dissolves after dehydration and dissolving is added in the reactor, stir, vacuumize and be heated to 80～85 ℃, and insulation did performed polymer 1.5～2.5 hours, all added the subsidy material at vacuum condition next time and stirred and removed vacuum in 5～10 minutes.
3, according to claim 1,2 production method, it is characterized in that the composition range of the subsidy material in the liquid polyurethane material is:
Chain extender ethylene glycol 30～50%(weight)
Crosslinking agent trihydroxy methyl third molten or glycerine 50～70%(weight)
The each component summation is a 100%(weight)
4, a kind of process units of rubber polyurethane compound tyre, comprise reactor, injector and mould, the invention is characterized in the batch mixing injector cylinder body (13) of double as reactor, stirring arm (14) and can entering on injector cylinder body (13) top, and by the notes plug (1) of hydraulic press (3) injection urethane raw in mould (5), with level be 15～miter angle mould (5) on, following two ends are respectively equipped with inlet valve (16) (18) and vacuum pump valve (7), and can thermostatically controlled electric hot plate (15) and mould (5) undercarriage (19).
5,, it is characterized in that it is interference fit with injector cylinder body (13) that polyurethane is annotated plug (1) according to the process units of claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90110295 CN1031495C (en) | 1990-12-28 | 1990-12-28 | Producing method and device for rubber polyurethane compound tyre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90110295 CN1031495C (en) | 1990-12-28 | 1990-12-28 | Producing method and device for rubber polyurethane compound tyre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1062692A true CN1062692A (en) | 1992-07-15 |
| CN1031495C CN1031495C (en) | 1996-04-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90110295 Expired - Fee Related CN1031495C (en) | 1990-12-28 | 1990-12-28 | Producing method and device for rubber polyurethane compound tyre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031495C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450737C (en) * | 2002-11-14 | 2009-01-14 | 丰田合成株式会社 | Method for manufacturing molded products |
| CN100460192C (en) * | 2003-06-05 | 2009-02-11 | 华南理工大学 | Method for retreading old tyre by using polyurethane elastomer material |
| CN103935061A (en) * | 2014-04-18 | 2014-07-23 | 青岛科技大学 | Tire retreading method and vulcanizing equipment |
| CN105539016A (en) * | 2016-01-12 | 2016-05-04 | 李明 | Polyurethane sandwiched tire and preparation method thereof |
| CN108129655A (en) * | 2017-12-31 | 2018-06-08 | 佛山市南海区会斌金属贸易有限公司 | A kind of ageing-resistant environment-friendly materials processing unit (plant) and preparation method |
| CN116511428A (en) * | 2023-07-04 | 2023-08-01 | 济宁运河机械有限公司 | Casting volume detection device for casting vacuum pouring |
-
1990
- 1990-12-28 CN CN 90110295 patent/CN1031495C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100450737C (en) * | 2002-11-14 | 2009-01-14 | 丰田合成株式会社 | Method for manufacturing molded products |
| CN100460192C (en) * | 2003-06-05 | 2009-02-11 | 华南理工大学 | Method for retreading old tyre by using polyurethane elastomer material |
| CN103935061A (en) * | 2014-04-18 | 2014-07-23 | 青岛科技大学 | Tire retreading method and vulcanizing equipment |
| CN105539016A (en) * | 2016-01-12 | 2016-05-04 | 李明 | Polyurethane sandwiched tire and preparation method thereof |
| CN108129655A (en) * | 2017-12-31 | 2018-06-08 | 佛山市南海区会斌金属贸易有限公司 | A kind of ageing-resistant environment-friendly materials processing unit (plant) and preparation method |
| CN116511428A (en) * | 2023-07-04 | 2023-08-01 | 济宁运河机械有限公司 | Casting volume detection device for casting vacuum pouring |
| CN116511428B (en) * | 2023-07-04 | 2023-09-22 | 济宁运河机械有限公司 | Casting volume detection device for casting vacuum pouring |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031495C (en) | 1996-04-10 |
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