CN103600499B - A kind of processing method of polyurethane composite crane span structure - Google Patents
A kind of processing method of polyurethane composite crane span structure Download PDFInfo
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- CN103600499B CN103600499B CN201310565559.4A CN201310565559A CN103600499B CN 103600499 B CN103600499 B CN 103600499B CN 201310565559 A CN201310565559 A CN 201310565559A CN 103600499 B CN103600499 B CN 103600499B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
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Abstract
The processing method that the present invention relates to a kind of polyurethane composite crane span structure, comprises the following steps: (1) glass fiber yarn passes together with glass mat preformation type frame, enters airtight glue-injection box；(2) by filling gun, polyurethane is injected in glue-injection box；(3) after glass fibre is sufficiently impregnated with polyurethane in glue-injection box, enter mold cavity；(4) it is molded at mold cavity internal heating curing；(5) utilize extruder that shaped article is pulled out mould；(6) cut off, deposit；Product shell thickness is 2-2.5mm, and in every meter of product, content of glass fiber is 80%, and polyurethane content is 20%.The processing method using the polyurethane composite crane span structure of the present invention, effectively preserves the ecological environment, reduces production safety hidden danger and cost of material, improves product stretching and bending strength, improves product quality stability.
Description
Technical field
The present invention relates to the cable testing bridge on a kind of highway or highway, a kind of cable testing bridge with compound polyurethane material.
Background technology
Due to shortcomings such as the weight of metallic cable crane span structure are big, perishable, being currently used for the cable testing bridge on highway or highway is the most gradually substituted by nonmetallic materials, mainly uses unsaturated polyester resin and glass fibre to make.CN103244753A, discloses a kind of composite sandwich structure cable bridge, including groove segment and cover plate unit；Described groove segment includes side plate and base plate, described side plate and base arrangement are the solid housing that constitutes of composite faces or the interlayer entity etc. of composite faces and sandwich material composition, wherein composite is to use fiber to make with resin, fiber selects carbon fiber, glass fibre etc., and resin selects unsaturated polyester (UP), adjacent benzene resin etc..There is the problem that 1, be contained within solvent benzol ethene due to unsaturated polyester resin, when fiber becomes crane span structure with resin thermoset Compound Machining, in thermoset processes, the volatilization of substantial amounts of styrene gas, serious environment pollution can be produced；2, production process needs add curing agent (MEK), accelerator (tree butyl ester) etc., add the cost of material of crane span structure processing, and styrene, MEK and tree butyl ester are all hazardous chemicals, if misoperation, it is susceptible to contingency, causes personal injury；3, in production process, additive (such as calcium carbonate, the talcum powder etc.) manual control added in unsaturated polyester resin, causes the crane span structure product quality difference pulled out the biggest.
Summary of the invention
Purpose of design: avoid the weak point in background technology, design one to preserve the ecological environment, reduce production safety hidden danger and cost of material, improve product stretching and bending strength, the processing method of the polyurethane composite crane span structure improved product quality stability.
Design: in order to realize above-mentioned purpose of design.1, use the feeding manner of closed, be first technical characteristic of the present invention.So purpose of design is, glass fibre enters in airtight glue-injection box, by filling gun, polyurethane is injected in glue-injection box, glass fibre is impregnating polyurethane in airtight glue-injection box, airtight due to glue-injection box, the factor such as ambient temperature, humidity that avoids, on polyurethane and the impact of glass fibre, improves the quality of product；And charging processing process is by equipment automation control, it is not required to add any additive, the stable uniformity of product quality has been effectively ensured.2, use polyurethane as adhesive, by glass fiber impregnated in polyurethane, be second technical characteristic of the present invention.So purpose of design is, polyurethane is used to inject in glue-injection box as adhesive, glass fibre is sufficiently impregnated with in polyurethane, enter after glass fiber impregnated in mould cavity, making product through thermoset forming, in its mould, heating-up temperature is 120 °-180 °, need not add other curing agent, accelerator etc. in whole process, not only reduce the cost of raw material, it also avoid the pollution to environment of the pernicious gases such as styrene and the personal injury to operating personnel.3, glass mat is distributed in the levels of glass fiber yarn, is the 3rd technical characteristic of the present invention.So purpose of design is, multiple pieces of glass fibrofelt lays respectively at the levels of glass fiber yarn, enhance the arrangement of fiber in product, improve cell body and the hot strength of lid and bending strength, thus decrease in work progress because crane span structure strength problem causes the phenomenon scrapped to occur, also allow for buying side and carry out Site Detection, be effectively increased crane span structure quality and efficiency of construction.4, the content of glass fibre is 80%, it is the 4th technical characteristic of the present invention, so purpose of design is, product is made by glass fibre and polyurethane are compound, and the content of glass fibre is improved, stretch-proof and the flexural strength of product can be effectively improved, if but the too high levels of glass fibre, not only the compound dynamics of the fragility of product its inner urethane high also reduces, verify through test of many times, the content of glass fibre is 80%, when polyurethane content is 20%, the hot strength of product is more than or equal to 610MPa, the bending strength of product is more than or equal to 972 MPa, this index exceeds well over the technical standard of country, and product width can reach more than 300mm, meet every quality requirement of crane span structure simultaneously.5, product shell thickness is 2mm～2.5mm, is the 5th technical characteristic of the present invention.So purpose of design is, the thickness of shell of product is reduced between 2mm～2.5mm, specific configuration composite construction due to glass fiber yarn, glass mat and polyurethane, in the case of reducing cell body and lid wall thickness, product still has the highest intensity, the most both reduce the production cost of product, also mitigated the weight of product, meet every quality requirement of crane span structure.6, polyurethane is formed by isocyanates and polyalcohol mixing addition polymerization, is the 6th technical characteristic of the present invention.So purpose of design is, isocyanates and polyalcohol are individually positioned in two airtight filling chambeies, and two filling chambeies all connect batch mixer, there is carbamate key connecting with the hydroxyl reaction in polyalcohol in isocyanate group in isocyanates, addition polymerization forms polyurethane, and polyurethane is injected rifle and injects in airtight glue-injection box subsequently, and whole process is airtight feed system, it is not required to add any additive, quality and the stability of product has been effectively ensured.
Technical scheme: the processing method of a kind of polyurethane composite crane span structure, comprises the following steps:
(1), by glass fibre raw material through preformation type frame, enter airtight glue-injection box；
By filling gun by polyurethane from Raw material pail, inject in glue-injection box；
(3) glass fibre is sufficiently impregnated with polyurethane in glue-injection box；
(4) the glass fibre after being sufficiently impregnated with enters mold cavity；
(5) the glass fibre of impregnating polyurethane is molded at mold cavity internal heating curing；
(6) utilize extruder that shaped article is pulled out mould；
(7) cut off according to the length requirement of product；
(8) the finished product after cutting off puts into finished room；
Product shell thickness is 2-2.5mm, and in every meter of product, content of glass fiber is 80%, and polyurethane content is 20%.
The present invention is compared with background technology, one is to use airtight feeding manner, it is to avoid the impact of outside environmental elements in production, improves product quality and stability；Two is that polyurethane replaces unsaturated-resin etc. as adhesive, had both reduced the cost of raw material, and it also avoid the pollution to environment of the pernicious gases such as styrene and the personal injury to operating personnel；Three is to reduce while product shell thickness, greatly strengthen hot strength and the bending strength of product, decreases and scraps phenomenon in work progress, is effectively improved crane span structure quality and efficiency of construction, it is simple to buying side carries out Site Detection；Four is to improve product service life, meets every quality requirement of crane span structure；Five is to reduce product shell thickness, larger production width simultaneously, alleviates product weight, meets the requirements of crane span structure construction.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings technical solution of the present invention is described further.
Accompanying drawing 1 is the FB(flow block) of crane span structure processing method of the present invention.
Accompanying drawing 2 is the cellular construction schematic diagram of crane span structure product of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Referring to the drawings 1,2.The processing method of a kind of polyurethane composite crane span structure, comprises the following steps:
(1) fixed position glass fiber yarn 21 and glass mat 20 being placed in production line；
(2) glass fiber yarn 21 and glass mat 20 design after preformation mold forming frame according to profiled sheeting, enter in airtight glue-injection box, and glass mat 20 is distributed in the levels of glass fiber yarn 21；
(3) in production line in two airtight filling chambeies, it is placed with isocyanates and polyalcohol (market outsourcing) respectively, and isocyanates and polyalcohol enter and mix addition polymerization generating polyurethane in batch mixer；
(4) utilize filling gun by polyurethane from Raw material pail, inject submergence glass fiber yarn 21 and glass mat 20 in airtight glue-injection box；
(5) glass fiber yarn 21 and glass mat 20 are sufficiently impregnated with polyurethane 22 in glue-injection box；
(6) glass fiber yarn 21 after being sufficiently impregnated with and glass mat 20 is sealed or closed channel enters mold cavity, mold cavity designs according to the structure of product；
(7) the glass fiber yarn 21 of impregnating polyurethane 22 and glass mat 20 are molded at mold cavity internal heating curing, and in mould, heating-up temperature is 120 °-180 °, mould heating arrangement system prior art, are not described herein at this；
(8) utilize extruder that shaped article is pulled out mould；
(9) cut off according to the length requirement of product, make product length keep consistent；
(10) the finished product after cutting off is put in finished room.
The said goods shell thickness is 2-2.5mm, and in every meter of product, content of glass fiber is 80%, and polyurethane content is 20%；
The said goods shell thickness is 2-2.5mm, and in every meter of product, content of glass fiber is 75%, and polyurethane content is 25%；
The said goods shell thickness is 2-2.5mm, and in every meter of product, content of glass fiber is 85%, and polyurethane content is 15%；
In every meter of product, glass fiber yarn 21 content is 65%, glass mat 20 content is 15%, or glass fiber yarn content is 60% in every meter of product, glass mat content is 20%, or glass fiber yarn content is 70% in every meter of product, glass mat content is 10%, within the above range, particularly in every meter of product, glass fiber yarn 21 content is 65%, when glass mat 20 content is 15%, the raising of content of glass fiber, enhance stretching and the bending strength of product, while reducing product thickness, also the product width processing at more than 300mm can be realized, expand use field, expand the scope of application of product.
The machining production line of above-mentioned crane span structure, is uniformly controlled by automation control appliance, improves the accuracy of proportion of raw material, is not required to add any other material agent, not only reduces cost in production process, also ensure that safety in production and constant product quality.
It is to be understood that: although the word that the mentality of designing of the present invention is contrasted detailed by above-described embodiment describes; but these words describe; simply the simple text of mentality of designing of the present invention is described; rather than the restriction to mentality of designing of the present invention; any combination without departing from mentality of designing of the present invention, increase or revise; as using levels glass mat, intermediate glass silvalin and polyurethane material as a cycling element, circulation arrangement etc. each falls within protection scope of the present invention the most continuously.
Claims (2)
1. a processing method for polyurethane composite crane span structure, comprises the following steps:
(1) isocyanates and polyalcohol are individually positioned in two airtight filling chambeies, and two filling chambeies all connect batch mixer, there is carbamate key connecting with the hydroxyl reaction in polyalcohol in isocyanate group in isocyanates, addition polymerization forms polyurethane, polyurethane is injected rifle and injects in airtight glue-injection box subsequently, whole process is airtight feed system, it is not required to add any additive, by glass fibre raw material through preformation type frame, described glass fibre is the levels that glass fiber yarn and glass mat and glass mat are distributed in glass fiber yarn, enter airtight glue-injection box；
By filling gun by polyurethane from Raw material pail, inject in glue-injection box；
(3) glass fibre is sufficiently impregnated with polyurethane in glue-injection box；
(4) the glass fibre after being sufficiently impregnated with enters mold cavity；
(5) the glass fibre of impregnating polyurethane is molded at 120 DEG C-180 DEG C mold cavity internal heating curings；
(6) utilize extruder that shaped article is pulled out mould；
(7) cut off according to the length requirement of product；
(8) the finished product after cutting off puts into finished room；
Product shell thickness is 2-2.5mm, and in every meter of product, content of glass fiber is 75-85%, and polyurethane content is 25-15%.
The processing method of polyurethane composite crane span structure the most according to claim 1, is characterized in that: in every meter of product, glass fiber yarn content is 60-70%, and glass mat content is 10-20%.
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| CN201310565559.4A CN103600499B (en) | 2013-11-13 | 2013-11-13 | A kind of processing method of polyurethane composite crane span structure |
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| CN201310565559.4A CN103600499B (en) | 2013-11-13 | 2013-11-13 | A kind of processing method of polyurethane composite crane span structure |
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| CN103600499A CN103600499A (en) | 2014-02-26 |
| CN103600499B true CN103600499B (en) | 2016-08-31 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703288B (en) * | 2016-02-26 | 2018-04-27 | 杭州天允科技有限公司 | Dual-component polyurethane step-shaped cable testing bridge and production method |
| CN106626446A (en) * | 2016-11-28 | 2017-05-10 | 重庆浙升科技有限公司 | Production process of outdoor ultraviolet-proof crane span structure |
| CN107033316A (en) * | 2017-05-22 | 2017-08-11 | 李蒙蒙 | Sound bar qin synthesis qin piece and preparation method thereof |
| CN109438967A (en) * | 2018-11-07 | 2019-03-08 | 铁科腾跃科技有限公司 | Continuous glass fibre enhances compound polyurethane material foot plank and preparation method thereof |
| CN111169034A (en) * | 2018-11-10 | 2020-05-19 | 浙江盛迪新材料股份有限公司 | Preparation method of polyurethane section |
| CN109367160A (en) * | 2018-11-21 | 2019-02-22 | 东莞市聚力玻纤制品有限公司 | A kind of polyurethane glass fiber electrical cross arm and preparation method thereof |
| CN109483916A (en) * | 2019-01-09 | 2019-03-19 | 浙江新纳复合材料有限公司 | A kind of preparation of polyurethane-type composite material bar material |
| CN109808203A (en) * | 2019-03-19 | 2019-05-28 | 重庆浙升科技有限公司 | A kind of transverse mechanical reinforces the processing technology of type polyurethane gantry |
| CN109878110A (en) * | 2019-03-20 | 2019-06-14 | 杭州天允科技有限公司 | A kind of processing technology of high anti-UV polyurethane gantry |
| CN111469332B (en) * | 2020-04-22 | 2021-10-08 | 京仪股份有限公司 | Processing technology of hot-dip galvanized polyurethane bridge with fire resistance |
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| CN103244753A (en) * | 2013-05-24 | 2013-08-14 | 南京工业大学 | Composite sandwich structure cable bridge |
| CN103321318A (en) * | 2012-03-22 | 2013-09-25 | 拜耳知识产权有限责任公司 | Use of fibre-reinforced polyurethane for forming a rail for a fitting assembly |
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| JPH07205318A (en) * | 1994-01-10 | 1995-08-08 | Kobe Steel Ltd | Fiber reinforced plastic material and production thereof |
| US8568061B2 (en) * | 2008-12-24 | 2013-10-29 | Foam Supplies, Inc. | Polyurethane foams for trench breaker and other applications |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201213210Y (en) * | 2008-06-13 | 2009-03-25 | 马纪财 | High strength iron belly glass steel bridge rack |
| CN102463678A (en) * | 2010-11-10 | 2012-05-23 | 江苏源盛复合材料技术股份有限公司 | Production technology of cable support |
| CN103321318A (en) * | 2012-03-22 | 2013-09-25 | 拜耳知识产权有限责任公司 | Use of fibre-reinforced polyurethane for forming a rail for a fitting assembly |
| CN103244753A (en) * | 2013-05-24 | 2013-08-14 | 南京工业大学 | Composite sandwich structure cable bridge |
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