CN104111199B - The method of testing of a kind of PUR heat resistance and device - Google Patents
The method of testing of a kind of PUR heat resistance and device Download PDFInfo
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- CN104111199B CN104111199B CN201410374459.8A CN201410374459A CN104111199B CN 104111199 B CN104111199 B CN 104111199B CN 201410374459 A CN201410374459 A CN 201410374459A CN 104111199 B CN104111199 B CN 104111199B
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Abstract
The method of testing of a kind of PUR heat resistance and device, belong to PUR technical field of performance test.It prepares and is coated with the blob of viscose of steel wire, is put in blob of viscose stationary fixture by this blob of viscose again, steel wire is respectively embedded in the groove of correspondence, again connector one end of blob of viscose stationary fixture is fixed on the lower gripper of cupping machine, the steel wire of the other end is connected on the upper clamper of cupping machine, under same stretch speed, it is drawn out the power used by blob of viscose to testing steel wire at different temperature respectively, judges its heat resistance according to the intensity of variation of power.The present invention is by adopting above-mentioned technology, complete the heat resistance evaluation of PUR, the method science is accurate, feasibility is high, simple to operation, acquired results can the anti-corrosion performance that show PUR of objective image, filled up a blank for the appraisement system of the heat resistance of domestic PUR, the very valuable test method that adds, be suitable to popularization and application.
Description
Technical field
The invention belongs to PUR technical field of performance test, be specifically related to method of testing and the device of the PUR heat resistance that a kind of science is accurate, feasibility is high, simple to operation.
Background technology
Steel wire mesh frame PE multiple tube has the advantages such as higher compressive resistance, good economy, stronger through-current capability, lighter meter Chong, transport more convenient, the traceable detection of installation because of it, it has also become the big product of the first of China's reinforced thermoplastics pipeline.The market practice in more than ten years shows: steel wire mesh frame PE compound pipeline complex pipeline, obtaining successfully simultaneously, also exposes problems.Most distinct issues are: heat resistance is poor, is generally only applicable to the low temperature field of less than 40 DEG C.The shear strength of binding resin and steel wire requires be more than or equal to 13, and could using, prove through substantial amounts of experimental and theoretical study, the heat resistance of multiple tube has been played conclusive effect by the PUR that steel wire reinforced composite tube intermediate layer uses.At present, domestic manufacturer, on the basis of original PUR, through modified, have developed the PUR with relatively high-temperature resistant performance in succession.
According to " CJ-T189-2007 steel-wire carcass PE tubing and pipe fitting " standard, evaluate PUR heat resistance most common method at present: using this PUR is that binding resin produces steel-wire carcass reinforced composite pipe, and this multiple tube is carried out the hydrostatic test under different temperatures.Experimental condition is: pressure: 1.2 times of nominal pressures；Time: 165h, if at corresponding temperature, 1.2 times of nominal pressures, after pressurize 165h, tubing does not break, impermeable, then illustrate that this tubing can be at such a temperature, life-time service within nominal pressure, it is evident that the method cost is high, test period is long, the loaded down with trivial details difficult operation of process, and affect normal Workshop Production, cause manpower, raw-material loss etc..
Summary of the invention
For the above-mentioned problems in the prior art, it is an object of the invention to provide that a kind of science is accurate, feasibility is high, simple to operation and detect method of testing and the device of quick PUR heat resistance.
The method of testing of described a kind of PUR heat resistance, it is characterised in that comprise the steps:
1) instrument involved by includes compression molding instrument, cupping machine, blob of viscose for making the blob of viscose being coated with steel wire make fixture and for fixing the blob of viscose stationary fixture of blob of viscose；
2) steel wire is placed in the groove of train wheel bridge that blob of viscose makes fixture, edge, train wheel bridge both sides is stretched out at steel wire two ends, cover again on the lower plate lid mated with train wheel bridge, the installing hole installing bolt insertion lower plate on train wheel bridge connects and obtains blob of viscose making fixture, this blob of viscose is made fixture and puts into compression molding instrument, putting into colloidal solid toward blob of viscose making fixture inner cavity to vulcanize, the blob of viscose obtaining being coated with steel wire is standby, and colloidal solid is binding resin；
3) by step 2) blob of viscose being coated with steel wire that makes is put in blob of viscose stationary fixture, steel wire is respectively embedded in the groove of correspondence, again connector one end of blob of viscose stationary fixture is fixed on the lower gripper of cupping machine, the steel wire of the other end relative with the connector of blob of viscose stationary fixture is connected on the upper clamper of cupping machine, under same stretch speed, it is drawn out the power used by blob of viscose to testing steel wire at different temperature respectively；
4) according to the pulling force measured, calculate corresponding shear strength, compared with the shear strength of standard, draw this thermosol heat resistance result at this section of temperature.
The method of testing of described a kind of PUR heat resistance, it is characterised in that it is all identical with the size of blob of viscose stationary fixture, shape and inner chamber size that described blob of viscose makes fixture, is of a size of 90mm × 50mm × 20mm.
The method of testing of described a kind of PUR heat resistance, it is characterised in that described steel wire diameter is 1.0mm.
The method of testing of described a kind of PUR heat resistance, it is characterized in that step 2) described in steel wire two ends stretch out the edge, both sides of train wheel bridge respectively, one end steel wire length being connected with the upper clamper of cupping machine is more than the distance between train wheel bridge and upper clamper.
The method of testing of described a kind of PUR heat resistance, it is characterized in that step 2) conditions of vulcanization is: curing temperature is 230 DEG C, cure time 50-70min, vulcanizer flat board pressure is 15MPa, within in sulfidation each 15 minutes, carry out an aerofluxus, sulfuration is removed from the molds sample after natural cooling 1h after terminating.
The method of testing of described a kind of PUR heat resistance, it is characterised in that the temperature described in step 3) is 20-100 DEG C, draw speed is 190-210mm/min.
The method of testing of described a kind of PUR heat resistance, it is characterised in that the cupping machine operating procedure described in step 3) is as follows: set test temperature, puller system returns to zero；Again the connector of blob of viscose stationary fixture is connected on the lower gripper of cupping machine, it is connected on the upper clamper of cupping machine with the steel wire of its one end in opposite directions, cut the steel wire that two ends are unnecessary, attached glue on cleaning steel wire, machine and make clamper increase, until steel wire is extracted out, record peak load.
The fixture used by method of testing of described a kind of PUR heat resistance, it is characterised in that include blob of viscose and make fixture and blob of viscose stationary fixture.
The fixture used by method of testing of described a kind of PUR heat resistance, it is characterized in that described blob of viscose makes fixture and includes being train wheel bridge and the lower plate of square shape structure, the one side that train wheel bridge coordinates with lower plate is arranged to install the groove of steel wire, train wheel bridge corner is respectively provided with installation bolt, and the corner correspondence of lower plate is symmetrical arranged installing hole.
The fixture used by method of testing of described a kind of PUR heat resistance, it is characterized in that described blob of viscose stationary fixture includes square shape chuck body, described chuck body is arranged to install the groove of steel wire, in chuck body with groove while arranging connector, by this connector, this fixture is connected on cupping machine, both sides vertical with groove limit in chuck body are equipped with the fixture for fixing blob of viscose, and described fixture is bolted in chuck body by fixing.
By adopting above-mentioned technology, compared with prior art, beneficial effects of the present invention is as follows:
The invention discloses the device used by a kind of novel PUR heat resistance evaluation methodology and the method, this apparatus structure is simple, easy to operate, those of ordinary skill operates, by using compression molding instrument, cupping machine, blob of viscose for making the blob of viscose being coated with steel wire makes fixture and for fixing the equipment such as the blob of viscose stationary fixture of blob of viscose, detect that steel wire pulls out the power needed for blob of viscose at the corresponding temperature, further according to corresponding computing formula, the shear strength at this temperature can be calculated, shear strength at this temperature and binding resin are required be more than or equal to compared with the standard of 13 with the shear strength of steel wire, can can significantly judge this PUR heat resistance at such a temperature, whether it is applicable to use at such a temperature.The method science is accurate, feasibility is high, simple to operation, and acquired results can the anti-corrosion performance that show PUR of objective image, filled up a blank for the appraisement system of the heat resistance of domestic PUR, the very valuable test method that adds, be suitable to popularization and application.
Accompanying drawing explanation
The blob of viscose that Fig. 1 is the present invention makes clamp structure schematic diagram；
Fig. 2 is the front view structural representation of Fig. 1 of the present invention；
Fig. 3 is blob of viscose fixing jig structure schematic diagram of the present invention.
1-train wheel bridge in figure, 2-lower plate, 3-groove, 4-installs bolt, and 5-blob of viscose makes fixture inner cavity, and 6-installing hole, 7-connector, 8-mounting groove, 9-chuck body, 10-fixture, 11-fixes bolt.
Detailed description of the invention
Below in conjunction with Figure of description, the invention will be further described:
As Figure 1-3, the method for testing of a kind of PUR heat resistance, comprise the steps:
1) instrument involved by includes compression molding instrument (Huzhou along power rubber manufacturing machinery company limited), cupping machine (testing equipment company limited is surveyed in Shenzhen ten thousand), blob of viscose for making the blob of viscose being coated with steel wire make fixture and for fixing the blob of viscose stationary fixture of blob of viscose；
As shown in Figure 1-2, described blob of viscose makes train wheel bridge 1 and the lower plate 2 that fixture includes being square shape structure, the one side that train wheel bridge 1 coordinates with lower plate 2 is arranged to install the groove 3 of steel wire, train wheel bridge 1 four jiaos is respectively provided with installation bolt 4, the corner correspondence of lower plate 2 is symmetrical arranged installing hole 6, is inserted by installation bolt 4 and obtains blob of viscose making fixture in installing hole 6；
As shown in Figure 3, described blob of viscose stationary fixture includes square shape chuck body 9, described chuck body 9 is arranged to install the mounting groove 8 of steel wire, in chuck body 9 with mounting groove 8 while arranging connector 7, by this connector 7, this fixture is connected on cupping machine, both sides vertical with mounting groove 8 limit in chuck body 9 are equipped with the fixture 10 for fixing blob of viscose, and described fixture 10 is connected in chuck body 9 by fixing bolt 11；
It is all identical with the size of blob of viscose stationary fixture, shape and inner chamber size that blob of viscose makes fixture, is of a size of 90mm*50mm*20mm；
2) steel wire that diameter is 1.0mm is placed in the groove 3 of train wheel bridge 1 that blob of viscose makes fixture, edge, train wheel bridge 1 both sides is stretched out at steel wire two ends, wherein while reserving certain length, should after it installs blob of viscose stationary fixture, connector 7 is fixed on lower gripper, the length that copper cash reserves is at least equal to the distance between train wheel bridge 1 edge and the upper clamper of cupping machine, cover the lower plate 2 mating with train wheel bridge 1 again to cover, installation bolt 4 on train wheel bridge 1 inserts to connect on the installing hole 6 of lower plate 2 and obtains blob of viscose making fixture, this blob of viscose is made fixture and puts into compression molding instrument, put into colloidal solid toward blob of viscose making fixture inner cavity 5 and carry out sulfur, the blob of viscose obtaining being coated with steel wire is standby；
3) by step 2) blob of viscose being coated with steel wire that makes is put in blob of viscose stationary fixture, steel wire is respectively embedded in the groove of correspondence, again connector one end of blob of viscose stationary fixture is fixed on the lower gripper of cupping machine, the steel wire of the other end relative with the connector of blob of viscose stationary fixture is connected on the upper clamper of cupping machine, under same stretch speed, it is drawn out the power used by blob of viscose to testing steel wire at different temperature respectively；Described temperature is 20-100 DEG C, and draw speed is 190-210mm/min, it is preferred to 200mm/min；
Described cupping machine operating procedure is as follows: set test temperature, and puller system returns to zero；Again the connector 7 of blob of viscose stationary fixture is connected on the lower gripper of cupping machine, it is connected on the upper clamper of cupping machine with the steel wire of its one end in opposite directions, cuts the steel wire that two ends are unnecessary, machine and make clamper increase, until steel wire is extracted out, record peak load.
3) according to the pulling force measured, calculate corresponding shear strength, compared with the standard that PUR shear strength requires (be more than or equal to 13MPa), draw this thermosol heat resistance result at this section of temperature.
Embodiments of the invention have been used common PUR and the modified PUR method according to the blob of viscose being coated with steel wire, respectively common PUR is made with modified PUR the corresponding common blob of viscose (being called for short PUR I) being coated with steel wire and is coated with the heat-resisting blob of viscose (being called for short PUR II) of steel wire, record 20 respectively by the method for testing of the present invention again, 30, 40, 50, 60, 70, 80, 90, most strong pulling force at 100 DEG C, computing formula according to binding resin Yu the shear strength of steel wire bonding interface, calculate corresponding shear strength, it is shown in Table 1.
The computing formula of the shear strength of bonding interface: σ=F/(3014 × d × t)
Wherein: σ--the shear strength of binding resin and steel wire bonding interface, unit is MPa；
F--maximum pull, unit is cattle；
D--steel wire diameter, unit is millimeter；
The interface length of t--steel wire and binding resin, unit is millimeter.
Common glue that table 1 records for the present invention and heat-resistant adhesive shear strength at different temperatures
As shown in table 1, PUR I is the PUR that on existing market, steel wire tube commonly uses, this glue shear strength when 40 DEG C is 11.8MPa, more than the 40 DEG C equal < 10MPa of its shear strength, (be more than or equal to 13MPa) is required according to PUR shear strength, can drawing, the maximum temperature that this glue heat resistance can bear is 40 DEG C；PUR II is on the basis of PUR I, obtain having relatively high temperature tolerance PUR through modified, shear strength when modified hot melt adhesive is within 80 DEG C is for being above 13MPa, can tentatively judge that this type PUR life-time service temperature is 80 DEG C, data according to this test gained, can save less than 80 DEG C each temperature sections of this PUR and be respectively adopted the test that tubing hydrostatic test heat resistance is loaded down with trivial details in a large number.
Method of testing according to the present invention, can clearly analyze the upper limit temperature of heat tolerance of blob of viscose, and compared with prior art, it is easy and simple to handle, cost is low, accuracy is high, is suitable to popularization and application.
Claims (8)
1. the method for testing of a PUR heat resistance, it is characterised in that comprise the steps:
1) instrument involved by includes compression molding instrument, cupping machine, blob of viscose for making the blob of viscose being coated with steel wire make fixture and for fixing the blob of viscose stationary fixture of blob of viscose；
2) steel wire is placed in the groove (3) of train wheel bridge (1) that blob of viscose makes fixture, train wheel bridge (1) edge, both sides is stretched out at steel wire two ends, cover the lower plate (2) mating with train wheel bridge (1) again to cover, installation bolt (4) on train wheel bridge (1) inserts the upper connection of installing hole (6) of lower plate (2) and obtains blob of viscose making fixture, this blob of viscose is made fixture and puts into compression molding instrument, putting into colloidal solid toward blob of viscose making fixture inner cavity (5) to vulcanize, the blob of viscose obtaining being coated with steel wire is standby；
3) by step 2) blob of viscose being coated with steel wire that makes is put in blob of viscose stationary fixture, steel wire is respectively embedded in the groove of correspondence, again connector one end of blob of viscose stationary fixture is fixed on the lower gripper of cupping machine, the steel wire of the other end relative with the connector of blob of viscose stationary fixture is connected on the upper clamper of cupping machine, under same stretch speed, it is drawn out the power used by blob of viscose to testing steel wire at different temperature respectively；
4) according to the pulling force measured, calculate corresponding shear strength, compared with the shear strength of standard, draw this thermosol heat resistance result at this section of temperature.
2. the method for testing of a kind of PUR heat resistance according to claim 1, it is characterised in that it is all identical with the size of blob of viscose stationary fixture, shape and inner chamber size that described blob of viscose makes fixture, is of a size of 90mm*50mm*20mm.
3. the method for testing of a kind of PUR heat resistance according to claim 1, it is characterised in that described steel wire diameter is 1.0mm.
4. the method for testing of a kind of PUR heat resistance according to claim 1, it is characterized in that step 2) described in steel wire two ends stretch out the edge, both sides of train wheel bridge (1) respectively, one end steel wire length being connected with the upper clamper of cupping machine is more than the distance between train wheel bridge (1) and upper clamper.
5. the method for testing of a kind of PUR heat resistance according to claim 1, it is characterized in that step 2) in conditions of vulcanization be: curing temperature is 230 DEG C, cure time 50-70min, vulcanizer flat board pressure is 15MPa, sulfidation carried out an aerofluxus every 15 minutes, sulfuration is removed from the molds sample after natural cooling 1h after terminating.
6. the method for testing of a kind of PUR heat resistance according to claim 1, it is characterised in that the temperature described in step 3) is 20-100 DEG C, and draw speed is 190-210mm/min.
7. the method for testing of a kind of PUR heat resistance according to claim 1, it is characterised in that the cupping machine operating procedure described in step 3) is as follows: set test temperature, puller system returns to zero；Again the connector (7) of blob of viscose stationary fixture is connected on the lower gripper of cupping machine, it is connected on the upper clamper of cupping machine with the steel wire of its one end in opposite directions, cut the steel wire that two ends are unnecessary, attached glue on cleaning steel wire, machine and make clamper increase, until steel wire is extracted out, record peak load.
8. the fixture used by the method for testing of a PUR heat resistance, it is characterized in that including blob of viscose makes fixture and blob of viscose stationary fixture, described blob of viscose makes train wheel bridge (1) and the lower plate (2) that fixture includes being square shape structure, the one side that train wheel bridge (1) coordinates with lower plate (2) is arranged to install the groove (3) of steel wire, train wheel bridge (1) corner is respectively provided with installation bolt (4), the corner correspondence of lower plate (2) is symmetrical arranged installing hole (6), described blob of viscose stationary fixture includes chuck body (9), described chuck body (9) is arranged to install the mounting groove (8) of steel wire, chuck body (9) upper with mounting groove (8) while arranging connector (7), by this connector (7), this fixture is connected on cupping machine, the upper both sides vertical with mounting groove (8) limit of chuck body (9) are equipped with the fixture (10) for fixing blob of viscose, described fixture (10) is connected in chuck body (9) by fixing bolt (11).
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| CN105699207B (en) * | 2016-04-11 | 2018-05-25 | 广州南沙珠江啤酒有限公司 | A kind of joint sealing hot melt adhesive heat resistance detection method |
| CN107246997B (en) * | 2017-08-14 | 2024-01-30 | 江苏法尔胜光电科技有限公司 | Shear strength testing device and shear testing method for steel wire auxiliary adhesive joint structure |
| CN108716968A (en) * | 2018-05-22 | 2018-10-30 | 浙江中特化工有限公司 | A kind of test device and its test method of test hot melt adhesive air-tightness |
| CN110736699B (en) * | 2019-09-11 | 2022-10-14 | 临海伟星新型建材有限公司 | Device for testing binding force between plastic part and metal insert and testing method thereof |
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| JP4700546B2 (en) * | 2006-04-12 | 2011-06-15 | 新日本製鐵株式会社 | High temperature tensile test jig |
| CN102181246B (en) * | 2011-03-15 | 2012-12-12 | 广东联塑科技实业有限公司 | Heat-resistant hot melt adhesive and preparation method and application thereof |
| CN103175741B (en) * | 2013-03-18 | 2016-05-25 | 中国建筑股份有限公司 | Device and method for steel bar tensile test in ultralow temperature environment |
| CN203500692U (en) * | 2013-05-10 | 2014-03-26 | 江苏申视新材料科技有限公司 | Flexible composite high pressure delivery pipe |
| CN203395415U (en) * | 2013-08-07 | 2014-01-15 | 浙江伟星新型建材股份有限公司 | Steel wire wound reinforcement plastic composite pipe with high performance and low cost |
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Effective date of registration: 20200709 Address after: 317000 No. 6 Qianjiang South Road, Dayang Street, Linhai City, Taizhou City, Zhejiang Province Patentee after: Linhai Weixing New Building Materials Co.,Ltd. Address before: Boye Road Economic Development Zone coastal city Taizhou city Zhejiang province 317000 Patentee before: ZHEJIANG WEIXING NEW BUILDING MATERIALS Co.,Ltd. |