CN103331864A - Roller product with high performance and high binding power between metal insert and PU tire bead, prepared by injection molding method - Google Patents
Roller product with high performance and high binding power between metal insert and PU tire bead, prepared by injection molding method Download PDFInfo
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- CN103331864A CN103331864A CN2013102111678A CN201310211167A CN103331864A CN 103331864 A CN103331864 A CN 103331864A CN 2013102111678 A CN2013102111678 A CN 2013102111678A CN 201310211167 A CN201310211167 A CN 201310211167A CN 103331864 A CN103331864 A CN 103331864A
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Abstract
The invention relates to an injection molding process for manufacturing a roller product with high performance and high binding performance between a PU tire bead and a metal wheel hub. The injection process is widely applied in the fields of escalator rollera, door hanging wheels, etc.
Description
Technical field
The present invention relates to a kind of polyurethane roller and Shooting Technique thereof, by the roller goods that this Shooting Technique prepares, its polyurethane tyre bead and metal wheel hub possess good adhesive property, are widely used in fields such as escalator roller, door change gear.
Background technology
Make polyurethane roller at present two kinds of traditional handicraft methods are arranged: Shooting Technique and pouring technology.
The Shooting Technique general procedure is: with thermoplastic polyurethane particle injection moulding roller tyre bead, wheel hub is pressed fit in the polyurethane tyre bead by low press interference earlier again, make tyre bead pack tightly wheel hub, thereby make roller; Wherein thermoplastic polyurethane can be selected polyester MDI+ hydrolysis-resisting agent thermoplastic polyurethane particle for use, and metal wheel hub can be selected aluminium alloy or 45# steel for use, and bearing can be selected standard iron and steel bearings such as 6203,6204 for use.Shooting Technique may further comprise the steps:
1), polyurethane tyre bead injection mo(u)lding: use 160-260T low-pressure injection molding machine injection polyurethane tyre bead, by injection mold control goods encapsulate size, the tyre bead injection moulding curing molding cycle is 65-70 second, and injection mold was opened automatically after injection moulding was finished, and the operative employee takes out the roller goods that moulding finishes;
2), carry out post curing operation in 16 hours with putting into 100 ℃ of baking ovens after the demoulding of polyurethane tyre bead;
3), again wheel hub is pressed fit in the polyurethane tyre bead by the interference of low pressure press, make tyre bead pack tightly wheel hub; Obtain the roller goods that tape spool not holds;
4), polyurethane roller that the metal wheel hub encapsulate is finished carries out the bearing assembling, obtains the polyurethane roller goods that tape spool holds.
The equipment cost that Shooting Technique is used is low, ten thousand yuan/mold of ten thousand yuan/complete equipment of injection-moulding device cost: 20-30 and injection mold cost: 3-4/platform injection machine.The injection moulding program is simple, the production efficiency height; Be example with 100 mm outer diameter polyurethane stair steps operations roller, the injection mo(u)lding time is 65-70 second/circulation, and output is 1200-1300 spare/class (8 hours).Cost of labor is low: every injection moulding needs 2 operative employees; The polyurethane material cost is low: thermoplastic polyurethane material's average price is 30-45 unit/kilogram.But owing to be to press-fit by the interference of low pressure press to prepare between metal wheel hub and the polyurethane tyre bead, so be not have cohesive force fully between wheel hub and the polyurethane tyre bead, can not satisfy user demand.The roller of traditional injection moulding explained hereafter is example, it is 20 kilograms of loads, under the environment of 50 meters/minute speeds of service, only move 8-10 minute and the defective that tyre bead deviates to cause roller to damage will occur, and＜=150 kilograms of loads, under the environment of 50 meters/minute speeds of service, also can only normally move 2000 hours.Therefore the cohesive force of the roller tyre bead of traditional injection moulding technology preparation and wheel hub is poor, can not satisfy high performance needs.
For the high-performance roller goods of cohesive force between tyre bead and the metal wheel hub greater than 35 Newton/millimeter, escalator roller for example generally needs to adopt the high temperature pouring technology of the metal wheel hub that heat-curable urethane and pre-glue spraying handle well to make; Wherein heat curing-type polyurethane can be selected polyethers TDI base polyurethane prepolymer for use as for use, and binding agent can be selected 100-120 ℃ of pyroreaction type polyurethane adhesive for use, and metal wheel hub can be selected aluminium alloy or 45# steel for use, and bearing can be selected standard iron and steel bearings such as 6203,6204 for use.Pouring technology may further comprise the steps:
1), use quartzy sand grains or iron sand grain to carry out the operation of pre-sandblast hacking to aluminium alloy wheel hub glue spraying face;
2), the sandblast rear-wheel hub is carried out surperficial degreasing cleaning operation;
3), use 100-120 ℃ of pyroreaction type polyurethane adhesive to carry out glue spraying to aluminium alloy wheel hub and polyurethane adhesive face;
4), the metal wheel hub after the glue spraying is positioned over humidity＜75%, in 5-30 ℃ of environment dry 2-3 hour;
5), metal wheel hub and the roller casting mold of the drying after the glue spraying were put into 120 ℃ of baking oven preliminary dryings 2-2.5 hour;
6), metal wheel hub is put into casting mold, by casting mold control goods encapsulate size, use two components or three component low pressure polyurethane elastomer casting machines in wheel hub outside pouring liquid thermoset polyurethane material;
7), casting complete goods and casting mold are put into 100-120 ℃ of drying tunnel, carry out 12-15 minute liquid polyurethane hot setting operations for forming;
8), after the heat-curable urethane moulding finishes, with the goods demoulding and put into 100 ℃ of baking ovens and carry out post curing operation in 16 hours, obtain the roller goods;
9), polyurethane roller that the metal wheel hub encapsulate is finished carries out the bearing assembling, obtains the polyurethane roller goods that tape spool holds.
The roller goods that prepare by this pouring technology, adhesion strength between the tyre bead that its metal wheel hub (aluminium alloy or 45# steel) and thermosetting polyethers TDI base polyurethane prepolymer for use as form has all reached the 45-55 Newton/millimeter, the adhesive property height is well positioned to meet escalator to the high performance requirements of its roller.Certain polyurethane escalator step operation roller of producing with the heat-curable urethane pouring technology is example, and its specification is: 100 millimeters of external diameters, and 25 millimeters of width, 20 millimeters of internal diameters, thick 10 millimeters of polyurethane tyre bead, hardness is 95(Shao Shi A); Thick 16 millimeters of aluminium alloy wheel hub, assembling 62042RS standard rolling bearing.Its under 200 kilograms the condition of heavy duty with 50 meters/minute speed under, can normally move 2000 hours, and roller does not have and comes unstuck defectives such as polyurethane breakage.Can normally move 5 years no mass defect behind the dress ladder.Therefore, the high performance polyurethane roller needs pouring technology production usually.But also there are a plurality of deficiencies in traditional pouring technology:
1), the equipment cost height, the low-pressure casting equipment cost is ten thousand yuan/platform of 70-80; In addition as the preheating drying tunnel, baking oven, the vacuum defoamation machine, the nitrogen implanter, add-on assembles such as pre-mixer, equipment cost is usually at ten thousand yuan of 110-120/cover;
2), production efficiency is low, the moulding of pouring technology urethane cures needs 20-25 minute/circulation, a pouring product line output is 550-570 spare/class (8 hours dutys);
3), cost of labor height: 4-5 name operating personnel;
4), material cost height: heat-curable urethane common used material polyethers TDI base polyurethane prepolymer for use as price is 50-85 unit/kilogram at present.
The object of the invention is to overcome by traditional injection moulding and pouring technology and prepares the not enough separately of roller goods, its tyre bead of polyurethane roller and the metal wheel hub that make as traditional injection moulding technology do not have cohesive force, and the production efficiency of traditional pouring technology is low, and the cost of equipment, material and manpower is all higher.The present invention aims to provide a kind of new injection moulding process of polyurethane roller, it has integrated the advantage of traditional injection moulding and pouring technology, its equipment cost that adopts, material cost and human cost are low, the production efficiency height, and possess good cohesive force (greater than 35 Newton/millimeter) between the metal wheel hub of the roller goods that make and the polyurethane tyre bead, and have the high-mechanic dynamic property.
Summary of the invention
Invention thinking of the present invention is to have drawn traditional injection moulding explained hereafter efficient height, and cost of investment is low, and the characteristics that the pouring technology properties of product are high are combined traditional injection moulding with the advantage of cast; Adopt the Shooting Technique that improves to produce the roller of high performance requirements, bonding force has the high-mechanic dynamic property greater than 35 Newton/millimeter between the metal wheel hub of this roller and polyurethane tyre bead.
The invention provides a kind of Shooting Technique of polyurethane roller, the tyre bead of this polyurethane roller and metal wheel hub have the cohesive force greater than 35 Newton/millimeter, it is characterized in that, this method may further comprise the steps:
1), the glue spraying face to metal wheel hub carries out the operation of pre-sandblast hacking;
2), the metal wheel hub that step 1) is obtained carries out surperficial degreasing cleaning operation;
3), to step 2) the glue spraying face of the metal wheel hub that obtains uses pyroreaction type binding agent to carry out pre-glue spraying and handles;
4), the metal wheel hub handled of pre-glue spraying that step 3) is obtained, at humidity≤75% time, in 5-30 ℃ of environment, preliminarily dried was handled 2-3 hour;
5), the metal wheel hub handled of the pre-glue spraying of preliminarily dried that step 4) is obtained under 110-120 ℃, preheating 2-10 hour;
6), the pre-metal wheel hub that has sprayed binding agent that step 5) obtains is put into injection moulding die cavity location earlier, fixing back matched moulds, re-using the low-pressure injection molding machine injects the liquid thermoplastic polyurethane material in the injection mold glue mouth by the casting machine screw rod, Jiao Kou is that fanout multipoint evenly distributes, and advancing the glue mode is that multiple spot Jiao Kou advances glue simultaneously, make liquid thermo-plastic polyurethane's material can in the extremely short time, in injection mold, conflux into the shape of tyre bead, the thermoplastic polyurethane material fully contacts with the binding agent of the glue spraying layer of metal wheel hub, react about 65-70 after second, from injection mold, take out the roller goods of moulding;
7), roller goods that step 6) is obtained carry out post curing and handle, and obtain polyurethane roller.
One embodiment of the present invention are that the roller goods that step 7) obtains are carried out the bearing assembling, obtain having the polyurethane roller of bearing.
In one embodiment of the present invention, adopt quartzy sand grains or the pre-sandblast of iron sand grain that metal wheel hub is carried out the hacking operation in the described step 1); And metal wheel hub is made by aluminium alloy or carbon steel material.
In one embodiment of the present invention, high-temperature reactivity binding agent described in the described step 3) refers to use between polyurethane and aluminium alloy or carbon steel material, makes the high-performance pyroreaction type binding agent that produces between polyurethane and aluminium alloy or carbon steel material greater than the high cohesive force of 35 Newton/millimeter by 140-210 ℃ high reaction temperature; This binding agent can be selected from Britain Xi Bang company
Deng binding agent.
In one embodiment of the present invention, thermoplastic polyurethane material described in the described step 6) refers to that response type lubrication prescription content is lower than 0.3% non-response type lubrication prescription and can guarantees the thermoplastic polyurethane material of the polyester MDI+ hydrolysis-resisting agent of quick injection cycle; It is the TPU thermoplastic particles of U90, U95 or the TPU material of 95 Shao Shi A that this polyurethane material can be selected the model of BAYER company for use.
In one embodiment of the present invention, the Jiao Kou described in the described step 6) is that fanout multipoint distributes, and wherein multiple spot refers to surpass 2 points; Be preferably the 3-8 point.
In one embodiment of the present invention, the post curing treatment conditions of described step 7) are: at 80-100 ℃, and dry 10-16 hour; Best post curing condition is 100 ℃, 10 hours.
For can by Shooting Technique produce bonding force between metal wheel hub and polyurethane tyre bead big and the carrying dynamic property roller that pouring technology produces that can match in excellence or beauty, the present invention has improved traditional Shooting Technique innovatively from five aspects:
The first, select special thermoplastic polyurethane material for use.Common thermoplastic polyurethane material is the short processing performance of the smooth and easy injection cycle of screw rod when guaranteeing injection moulding, in polyurethane material, contain 0.3-0.5% response type lubrication prescription usually, but the response type lubrication prescription can react with the binding agent on metal wheel hub surface, thereby influences the adhesive property of binding agent and polyurethane tyre bead.Therefore, for adhesive property and the tradition cast roller goods that guarantee the roller goods that injection moulding is produced have suitable adhesive property, namely cohesive force is greater than 35 Newton/millimeter; The inventor has selected response type lubrication prescription content to be lower than 0.3% and can guarantee that the thermoplastic polyurethane material of the particular polyesters MDI+ hydrolysis-resisting agent of quick injection cycle produces.This type of thermoplastic polyurethane material's attribute is the MDI+ hydrolysis-resisting agent; The model that specifically can select BAYER company for use is the TPU thermoplastic particles of U90, U95 or the TPU material of 95 Shao Shi A etc.
The second, select special adhesive for use.Because the polyurethane moulded temperature of selecting for use is 200-220 ℃, if the 100-120 ℃ of reaction type polyurethane adhesive that uses when selecting traditional pouring technology for use, then can cause the reaction of adhesive and polyurethane tyre bead insufficient owing to the reaction temperature of adhesive and polyurethane is inconsistent, thereby cause the cohesive force difference of metal wheel hub and polyurethane tyre bead even do not have the defective of cohesive force; Therefore, the inventor has selected the 200-220 ℃ of special polyurethane adhesive of pyroreaction type for use.This type of pyroreaction type adhesive attribute is polyurethane and the agent of metal reaction cohesive, specifically can select Britain Xi Bang company for use
Deng binding agent.
Three, production technology is improved.The inventor adopts special injection moulding process:
1) operation more becomes: be different from conventional urethane roller injection moulding operation: namely use thermoplastic polyurethane particle injection moulding roller tyre bead earlier, again wheel hub is pressed fit in the polyurethane tyre bead by the interference of low pressure press, making tyre bead pack tightly wheel hub, is not have cohesive force between wheel hub and the tyre bead.The present invention puts into injection mold with the metal wheel hub that carries out with the special polyurethane adhesive of pyroreaction type after pre-glue spraying is handled, use injection machine injection polyurethane tyre bead under the high temperature of the wheel hub outside, adhesive and polyurethane are in the high-temperature injection process, solidify reaction back, thus obtain having high cohesive force between wheel hub and the tyre bead high-performance roller goods of (generally greater than 35 Newton/millimeter).
2) technological parameter changes-improves injection temperature, injection moulding speed, reduction dwell pressure.Injection temperature is usually between 170-195 ℃ in the conventional urethane Shooting Technique, such injection temperature deficiency is so that 200-220 ℃ of quick-reaction type adhesive and polyurethane and metal wheel hub complete reaction, cause the cohesive force between the metal wheel hubs such as polyurethane tyre bead and aluminium alloy or steel not good, then occur coming unstuck during the roller load running, the tyre bead open defect causes product quality defective.The inventor is increased to injection temperature between 200-210 ℃, simultaneously in order to prevent that the thermoplastic polyurethane material from occurring burning in the high temperature injection forming process, the defective of choking with resentment, injection moulding speed is accelerated 5-8%, and dwell pressure reduces 3-5%, thereby make polyurethane material in the high speed injection process, can reach 200-205 ℃ height material temperature, can fully react with the fast reaction type polyurethane adhesive, thereby improve the adhesive property between polyurethane tyre bead and the metal wheel hubs such as aluminium alloy or steel, and during with high speed injection motding than the mode of low pressure holding pressure, eliminate the defective of choking with resentment when assisting high speed injection motding TPU, guarantee thermoplastic polyurethane tyre bead quality.
Four, the change of injection mold structure.The mold cavity configuration of an injection polyurethane tyre bead in the traditional injection moulding technology, and the present invention puts into injection moulding die cavity location, the direct injection polyurethane tyre bead of fixing back matched moulds earlier to the metal wheel hub adhesive surface with the metal wheel hub that has sprayed binding agent in advance, thus the roller product molding.
That five, improves mould advances the glue mode: in the traditional injection moulding technology, the polyurethane tyre bead a bit advances the glue moulding of confluxing by mold cavity configuration, and in the present invention, for make thermo-plastic polyurethane's material when the liquid state in injection mold, to conflux into the shape of tyre bead in the extremely short time, and at high temperature fully react with the binding agent on metal wheel hub surface and improved adhesive property, this is improved to multiple spot or the fanout multipoint formula is advanced glue by a point type will to advance the glue mode, thereby confluxes moulding at a high speed.Preferably, to advance glue be that even fanout multipoint formula is advanced glue to the fanout multipoint formula.Preferably, the fanout multipoint formula is advanced glue and is advanced glue for the 3-8 point type.Fanout multipoint advances glue and had both reduced injection time, has improved the adhesive property between metal wheel hub and tyre bead again.
Terminological interpretation
PU refers to polyurethane.
TPU refers to TPUE.
MDI refers to methyl diphenylene diisocyanate.
TDI refers to toluene di-isocyanate(TDI).
Description of drawings
Fig. 1 has shown that one in the technology of the present invention goes out four injection mold schematic diagrames, and this mould possesses 3 fan-shaped even distribution Jiao Kou (1).
Fig. 2 has shown the basic structure of injection moulding roller product: outermost layer is TPU tyre bead (1), and inside is metal bearing (2), is bondd by binding agent between metal bearing (2) and the TPU tyre bead (1).
Fig. 3 has shown the The performance test results figure of the roller goods of technology preparation of the present invention.
The invention effect
Compare traditional pouring technology of selecting thermosetting polyurethane elastomer for use, improved TPUE injection molding technology of the present invention has following 3 advantages:
One, aspect the adhesive property of metal wheel hub and tyre bead, select for use pyroreaction type TPUE to be better than selecting for use thermosetting polyurethane elastomer through the roller of traditional pouring technology preparation through the polyurethane roller of Shooting Technique of the present invention preparation; The contrast of cohesive force test result sees Table 1.
The contrast of table 1. cohesive force test result
Two, the Shooting Technique after the improvement is higher about 4-5 times than traditional pouring technology production efficiency, and the production efficiency of traditional pouring technology is 110-150 spare/people/class (8 hours); And the production efficiency of the Shooting Technique after improving is 500-650 spare/people/class (8 hours).
Three, on material cost, the Shooting Technique after the improvement is than traditional pouring technology low 40%; The heat-curable urethane price that the tradition pouring technology is selected for use is 50-80 unit/kilogram, and the thermoplastic polyurethane price that the Shooting Technique after improving is selected for use is 30-45 unit/kilogram.
Four, the Shooting Technique after the improvement is lower than traditional pouring technology equipment cost.
Following examples only are to understand the present invention in order to assist; be not so limit scope of the present invention; every following of spirit and scope of the invention of describing in the specification that do not break away from is made any equivalent auxiliary agent, operation, step replacement or change; or see that directly or indirectly the present invention is used in relevant technical field, includes within the protection domain of patent of the present invention.
Specific embodiment
Prepare the polyurethane roller that tape spool not holds, may further comprise the steps:
1), the glue spraying face to metal wheel hub carries out the operation of pre-sandblast hacking;
2), the metal wheel hub that step 1) is obtained carries out surperficial degreasing cleaning operation;
3), to step 2) the glue spraying face of the metal wheel hub that obtains uses pyroreaction type binding agent to carry out pre-glue spraying and handles;
4), the metal wheel hub handled of pre-glue spraying that step 3) is obtained, at humidity≤75% time, in 5-30 ℃ of environment, preliminarily dried was handled 2-3 hour;
5), the metal wheel hub handled of the pre-glue spraying of preliminarily dried that step 4) is obtained under 110-120 ℃, preheating 2-10 hour;
6), the pre-metal wheel hub that has sprayed binding agent that step 5) obtains is put into injection moulding die cavity location earlier, fixing back matched moulds, re-using 160-260T low-pressure injection molding machine injects the liquid thermoplastic polyurethane material in the injection mold glue mouth by the casting machine screw rod, Jiao Kou is that fanout multipoint evenly distributes, and advancing the glue mode is that multiple spot Jiao Kou advances glue simultaneously, make liquid thermo-plastic polyurethane's material can in the extremely short time, in injection mold, conflux into the shape of tyre bead, the thermoplastic polyurethane material fully contacts with the binding agent of the glue spraying layer of metal wheel hub, react about 65-70 after second, from injection mold, take out the roller goods of moulding;
7), roller goods that step 6) is obtained carry out post curing and handle, and obtain polyurethane roller.
Embodiment 2
The polyurethane roller of the aluminium alloy wheel hub that the preparation tape spool holds may further comprise the steps:
1), the glue spraying face to aluminium alloy wheel hub uses quartzy sand grains to carry out the operation of pre-sandblast hacking;
2), the metal wheel hub that uses automatic water washer that step 1) is obtained carries out surperficial degreasing cleaning operation;
3), to step 2) the glue spraying face of the metal wheel hub that obtains uses the trade mark to carry out pre-glue spraying as the pyroreaction type binding agent of the Britain west 49C of nation and handles;
4), the metal wheel hub handled of pre-glue spraying that step 3) is obtained, at humidity＜75% time, in 5-30 ℃ of environment, preliminarily dried was handled 2-3 hour;
5), the metal wheel hub of the pre-glue spraying processing of the preliminarily dried that step 4) is obtained is put into baking oven under 110-120 ℃, preheating 2-10 hour;
6), the pre-metal wheel hub that has sprayed binding agent that step 5) obtains is put into injection moulding die cavity location earlier, fixing back matched moulds, by injection mold control goods encapsulate size, re-using 160-260T low-pressure injection molding machine is that liquid thermoplastic MDI and the hydrolysis-resisting agent polyurethane particles of BAYER U-95 injected in the injection mold glue mouth by the casting machine screw rod with the trade mark, Jiao Kou is 3 fan-shaped even distributions, and advancing the glue mode is that 3 Jiao Kou advance glue simultaneously, make liquid thermo-plastic polyurethane's material in the extremely short time, fill die cavity rapidly and uniformly and to make polyurethane material in injection mold, conflux into the shape of tyre bead fast, the thermoplastic polyurethane material fully contacts with the binding agent of the glue spraying layer of metal wheel hub, reaction, the tyre bead injection moulding curing molding cycle is 65-80 second, injection mold was opened automatically after injection moulding was finished, and the operative employee takes out the roller goods that moulding finishes;
7) the roller goods that, step 6) obtained take out and put into 100 ℃ of baking ovens and carry out post curing operation in 10-16 hour;
8), the roller goods that obtain of step 7) carry out the bearing assembling, obtain the polyurethane roller that tape spool holds.
Embodiment 3
Prepare the polyurethane roller that tape spool not holds, may further comprise the steps:
1), the glue spraying face to metal wheel hub carries out the operation of pre-sandblast hacking;
2), the metal wheel hub that step 1) is obtained carries out surperficial degreasing cleaning operation;
3), to step 2) the glue spraying face of the metal wheel hub that obtains uses pyroreaction type binding agent to carry out pre-glue spraying and handles;
4), the metal wheel hub handled of pre-glue spraying that step 3) is obtained, at humidity≤75% time, in 5-30 ℃ of environment, preliminarily dried was handled 2-3 hour;
5), the metal wheel hub handled of the pre-glue spraying of preliminarily dried that step 4) is obtained under 110-120 ℃, preheating 2-10 hour;
6), the pre-metal wheel hub that has sprayed binding agent that step 5) obtains is put into injection moulding die cavity location earlier, fixing back matched moulds, re-using 160-260T low-pressure injection molding machine injects the liquid thermoplastic polyurethane material in the injection mold glue mouth by the casting machine screw rod, Jiao Kou is 3 fan-shaped even distributions, and advancing the glue mode is that 3 Jiao Kou advance glue simultaneously, make liquid thermo-plastic polyurethane's material can in the extremely short time, in injection mold, conflux into the shape of tyre bead, the thermoplastic polyurethane material fully contacts with the binding agent of the glue spraying layer of metal wheel hub, react about 65-70 after second, from injection mold, take out the roller goods of moulding;
7), roller goods that step 6) is obtained carry out post curing and handle, and obtain polyurethane roller.
In order to realize that better the product tyre bead bad defective such as serious of burning, shrink can not appear again in the high cohesive force greater than 35 Newton/millimeter between injecting products polyurethane tyre bead and metal wheel hub, the Shooting Technique parameter improvement in the step 6) is the staged operation parameter:
1, high injection temperature: first section temperature of heating: 198 ℃; Second section temperature of heating: 210 ℃; The 3rd section temperature of heating: 215 ℃; The 4th section temperature of heating: 195 ℃; The 5th section temperature of heating: 205 ℃.
2, high speed injection: first section injection speed: 25% speed, second section injection speed, pressure: 25%; The 3rd section injection speed, pressure: 20% speed.
3, reduce dwell pressure: first section dwell pressure: 115bar, second section dwell pressure: 100bar.
The performance test experiment of the roller goods of technology preparation of the present invention
Tested wheel hub and the polyurethane tyre bead adhesive property of the roller goods of technology preparation of the present invention, test parameter is:
Sample 1:
Mean force=84.2848 Newton/millimeter; Minimum force=55.9422 Newton/millimeter; Maximum peak power=99.6134 Newton/millimeter; Average peak power=83.0508 Newton/millimeter; Smallest peaks power=55.9422 Newton/millimeter; Meta peak power=99.6134 Newton/millimeter
Sample 2:
Mean force=94.8886 Newton/millimeter; Minimum force=56.4578 Newton/millimeter; Maximum peak power=119.5669 Newton/millimeter; Average peak power=97.7442 Newton/millimeter; Smallest peaks power=59.8091 Newton/millimeter; Meta peak power=100.2834 Newton/millimeter
Sample 3:
Mean force=96.4850 Newton/millimeter; Minimum force=65.4809 Newton/millimeter; Maximum peak power=121.5263 Newton/millimeter; Average peak power=92.4286 Newton/millimeter; Smallest peaks power=66.4088 Newton/millimeter; Meta peak power=96.5197 Newton/millimeter
The performance test results is seen Fig. 3.
Wheel hub and the polyurethane tyre bead adhesive property test result of the roller goods of table 2, embodiment 3 preparations
| By sticking wheel hub material | By adhesive aggregation ammonia ester material | Adhesion strength (Newton/millimeter) |
| Aluminium alloy | The thermoplastic polyurethane tyre bead | 55-100 |
| The 45# steel | The thermoplastic polyurethane tyre bead | 55-100 |
Cohesion test is the result show: possess remarkable adhesive property between the wheel hub of the roller goods of preparation and the polyurethane tyre bead.
Tested the dynamic life time of the roller goods of Shooting Technique preparation of the present invention, test standard is: testing machine rotating cylinder external diameter is 500 millimeters, high-performance roller product must be 50 meters/minute at rotating speed, operation is 2000 hours under the environment of 200 kilograms of pressurizeds, operation rear roller sample must still can normally move, and tyre bead, wheel hub, bearing all do not have damage.
Table 3, dynamic life test report:
| Roller manufacturing company: | According to closing this elevator handrail (Shanghai) Co., Ltd. |
| Use bearing: | BR62042RS |
| The tyre bead material: | Polyester MDI+ water repellent agent 95 Shao A hardness thermoplastic polyurethane |
| The roller size specification: | 100 millimeters of external diameters, 25.0 millimeters of width |
| Date of manufacture: | 2012-6-15 |
Show from the dynamic life test report of table 3, the thermoplastic polyurethane roller goods of Shooting Technique preparation of the present invention, metal wheel hubs such as its tyre bead and aluminium alloy or steel possess the high-adhesion energy; Can finely satisfy the dynamic life time test of load-carrying elevator.
Claims (9)
1. the Shooting Technique of a polyurethane roller is characterized in that, may further comprise the steps:
1), the glue spraying face to metal wheel hub carries out the operation of pre-sandblast hacking;
2), the metal wheel hub that step 1) is obtained carries out surperficial degreasing cleaning operation;
3), to step 2) the glue spraying face of the metal wheel hub that obtains uses pyroreaction type binding agent to carry out pre-glue spraying and handles;
4), the metal wheel hub handled of pre-glue spraying that step 3) is obtained, at humidity≤75% time, in 5-30 ℃ of environment, preliminarily dried was handled 2-3 hour;
5), the metal wheel hub handled of the pre-glue spraying of preliminarily dried that step 4) is obtained under 110-120 ℃, preheating 2-10 hour;
6), the pre-metal wheel hub that has sprayed binding agent that step 5) obtains is put into injection moulding die cavity location earlier, fixing back matched moulds, re-using the low-pressure injection molding machine injects the liquid thermoplastic polyurethane material in the injection mold glue mouth by the casting machine screw rod, Jiao Kou is that fanout multipoint evenly distributes, and advancing the glue mode is that multiple spot Jiao Kou advances glue simultaneously, make liquid thermo-plastic polyurethane's material can in the extremely short time, in injection mold, conflux into the shape of tyre bead, the thermoplastic polyurethane material fully contacts with the binding agent of the glue spraying layer of metal wheel hub, react about 65-70 after second, from injection mold, take out the roller goods of moulding;
7), roller goods that step 6) is obtained carry out post curing and handle, and obtain polyurethane roller.
2. technology according to claim 1 is characterized in that, the roller goods that step 7) is obtained carry out the bearing assembling, obtain having the polyurethane roller of bearing.
3. technology according to claim 1 and 2 is characterized in that, adopts quartzy sand grains or the pre-sandblast of iron sand grain that metal wheel hub is carried out the hacking operation in the described step 1); And metal wheel hub is made by aluminium alloy or carbon steel material.
4. technology according to claim 1 and 2, it is characterized in that, high-temperature reactivity binding agent described in the described step 3) refers to use between polyurethane and aluminium alloy or carbon steel material, makes the high-performance pyroreaction type binding agent that produces between polyurethane and aluminium alloy or carbon steel material greater than the high cohesive force of 35 Newton/millimeter by 140-210 ℃ high reaction temperature.
5. technology according to claim 1 and 2, it is characterized in that thermoplastic polyurethane material described in the described step 6) refers to that response type lubrication prescription content is lower than 0.3% non-response type lubrication prescription and can guarantees the thermoplastic polyurethane material of the polyester MDI+ hydrolysis-resisting agent of quick injection cycle.
6. technology according to claim 1 and 2 is characterized in that, the Jiao Kou described in the described step 6) is that fanout multipoint evenly distributes, and wherein multiple spot refers to surpass 2 points.
7. technology according to claim 6 is characterized in that, described step 6) multiple spot refers to be preferably the 3-8 point.
8. technology according to claim 1 and 2 is characterized in that, the post curing treatment conditions of described step 7) are: 80-100 ℃, and dry 10-16 hour.
9. technology according to claim 8 is characterized in that, the post curing treatment conditions of described step 7) are preferably at 100 ℃, dry 10-16 hour.
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| CN106044500A (en) * | 2016-06-28 | 2016-10-26 | 依合斯工程塑胶（上海）有限公司 | Lift door pulley and production method thereof |
| CN107225726A (en) * | 2017-06-19 | 2017-10-03 | 杭州台创实业有限公司 | A kind of hub surface handling process and metal wheel hub Shooting Technique |
| CN107263797A (en) * | 2017-06-19 | 2017-10-20 | 杭州台创实业有限公司 | A kind of metal wheel hub Shooting Technique |
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| CN107377276A (en) * | 2017-06-19 | 2017-11-24 | 杭州台创实业有限公司 | A kind of hub surface bonding agent coating process and metal wheel hub Shooting Technique |
| CN109450145A (en) * | 2018-09-20 | 2019-03-08 | 杭州多宝电子有限公司 | The cover and preparation method thereof |
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