CN103802330B - Shoe-press roller boots overlap manufacture method - Google Patents
Shoe-press roller boots overlap manufacture method Download PDFInfo
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- CN103802330B CN103802330B CN201410054517.9A CN201410054517A CN103802330B CN 103802330 B CN103802330 B CN 103802330B CN 201410054517 A CN201410054517 A CN 201410054517A CN 103802330 B CN103802330 B CN 103802330B
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- polyurethane
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- shoe
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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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Paper (AREA)
Abstract
The invention discloses a kind of shoe-press roller boots and overlap manufacture method, its step includes: mould spraying releasing agent, cast bottom polyurethane, braiding strengthen Kafra fiber thread layers, cast sandwich layer polyurethane, put core net, casting area layer layer of polyurethane, turning rill.The Boot sleeve structure that the inventive method produces is reasonable, and stability is high, and anti-crack ability is strong, case hardness is high, not easy damaged, length was suitable for high speed paper machine and used service life, when the boots set that the inventive method produces uses, press dewatering performance is strong, l Water Paper squeeze aqueous preferably, the papery that produces smooth, stable.
Description
Technical field
The present invention relates to the manufacture method of a kind of paper machine shoe-press roller boots set, relate to paper machine squeezing field.
Background technology
Paper machine shoe-press roller is the important shaping of paper machine wet end and drainage facilities, and boots set is a kind of squeeze set, is exclusively used in shoe press roll.Conventional paper machines pressure roller nip is narrow, and when improving line pressure, pressure concentrates the conquassation easily causing page, limits page dehydration；Press with large-roll-diameter roller adds nip width to a certain extent, can properly increase line pressure, but still can not meet the requirement of high-speed paper machine；Early 1980s is proposed wide nip press or time delay squeezing (being called for short ENP), also referred to as shoe press, this squeezing has the widest nip (general width is 200～310 mm(typical length 254mm), it it is 6～10 times of conventional press width (20～60 mm), up to 1500 kN/m(conventional press can be used less than 100 kN/m) line pressure, which achieves a leap in terms of dehydration, the most applicable for high-speed paper machine.
Paper machine boots set directly affects the quality of paper, current paper industry dog-eat-dog, and paper machine press shoe overlaps 100% dependence on import.Although existing high speed paper machine press shoe set substantially can complete into the shaping of page, squeeze and dehydration task, but its weak point is boots set in use easily to be cracked from the corner of ditch end, it is susceptible to be full of cracks and the damage on surface, the abrasion of inside, and the tendency that the flatness of the papery and wet paper surface that there is squeezing deteriorates, cause paper machine squeezing shoe cover dehydrating amount not, can only at the bottom of low pressure squeezing extruding, drained strength, papery unsmooth, inadaptable produce high speed paper machine product.
Summary of the invention
The invention provides a kind of shoe-press roller boots and overlap manufacture method, the boots set wearability of making has both with hardness, is especially suitable for current high speed paper machine and uses.
The present invention seeks to be achieved through the following technical solutions: its step includes:
(1), cleaning boots sleeve forming mould surface, on boots sleeve forming mould spray releasing agent；
(2), uniformly cast bottom polyurethane (polyurethane) on boots sleeve forming mould, polyurethane uses PAUR, cast thickness is 1～2.2 mm, flame froth breaking method is used to guarantee do not have bubble to produce while cast, wherein being added with the special defoamer of polyurethane in polyurethane in advance, adding proportion is 0.1～0.5%wt；
(3), before bottom layer of polyurethane is not fully cured, the anti-tensile that laterally stretches along mold cores strengthens Kafra fiber yarn, and simultaneously along longitudinally adding this yarn, makes enhancing Kafra fiber cover bottom layer of polyurethane surface；
(4), before bottom layer of polyurethane is not fully cured, at Kafra fiber thread layers upper sandwich layer polyurethane, Kafra fiber thread layers is closely linked with bottom layer of polyurethane, cast thickness is 1～1.5 mm, flame froth breaking method is used to guarantee do not have bubble to produce while cast, polyurethane uses PAUR, is added with the polyurethane defoamer of 0.1～0.7%wt in advance；
(5), after sandwich layer layer of polyurethane cools and solidifies, processing sandwich layer layer of polyurethane cured layer is to pre-set dimension；
(6), overlapping core net on the sandwich layer layer of polyurethane processed, core net is woven with polyester fiber or nylon fiber in advance；
(7), set on core net boots sleeve forming mould on rotary casting 3-5 strata urethane as surface layer layer of polyurethane, flame froth breaking method is used to guarantee do not have bubble to produce while cast, polyurethane uses EU, it is added with the special defoamer of polyurethane of 0.1～0.6%wt in advance, cast all should be carried out before preceding layer layer of polyurethane is not fully cured every time, and every layer thickness controls 0.8～1.2mm；
(8), after surface layer layer of polyurethane cools and solidifies, process and be ground to pre-set dimension, and go out the rill of certain density, the degree of depth 1.0～1.5 mm of rill, width 0.7～1.3 mm in its surface turning.
Preferably, in step (2), cast thickness is 2mm, and polyurethane special defoamer adding proportion is 0.3%wt.
Preferably, in step (4), cast thickness is 1.2mm, and polyurethane special defoamer adding proportion is 0.5%wt.
Preferably, in step (7), rotary casting 4 strata urethane is as surface layer layer of polyurethane, and every layer thickness is 1mm, and polyurethane special defoamer adding proportion is 0.4%wt.
Preferably, in step (8), the degree of depth of rill is 1.2mm, and width is 1 mm.
Preferably, the polyurethane that PAUR employing Shore hardness used is 90～100 is poured into a mould.
Preferably, cast EU used uses Shore hardness polyurethane more than 95.
Bottom and the surface layer of the boots set of the inventive method use variety classes, the polyurethane of different hardness to pour into a mould, and owing to bottom needs contact lubricated cooling oil, therefore use PAUR, and its hardness is relatively low, and pliability is preferable, can oil resistant solution, wear-resisting, high temperature resistant；Face layer contacts is l Water Paper, therefore uses the EU that hardness is higher.For improving the stability of boots set, bottom is woven with enhancing Kafra fiber yarn, strengthen Kafra fiber thread density is low, intensity is high, good toughness, high temperature resistant, be prone to processing and molding, its intensity is 5 times of equal quality iron and steel, but density is only 1/5th of iron and steel.For improving the effect of prestressed of boots set, in the polyurethane of cast, it is added with defoamer, and during cast, uses flame froth breaking method to guarantee do not have bubble to produce.The Boot sleeve structure that the inventive method produces is reasonable, and stability is high, and anti-crack ability is strong, case hardness is high, not easy damaged, length was suitable for high speed paper machine and used service life, when the boots set that the inventive method produces uses, press dewatering performance is strong, l Water Paper squeeze aqueous preferably, the papery that produces smooth, stable.
Detailed description of the invention
Embodiment
1
This shoe-press roller boots overlap manufacture method, and its step includes:
(1), cleaning boots sleeve forming mould surface, on boots sleeve forming mould spray releasing agent；
(2), uniformly cast bottom polyurethane (polyurethane) on boots sleeve forming mould, polyurethane uses QT type polyester-polyurethane, cast thickness is 2mm, flame froth breaking method is used to guarantee do not have bubble to produce while cast, wherein it is added with polyurethane special defoamer XD-770 in polyurethane in advance, adding proportion is its Shore hardness 92～93 of 0.3%wt, QT type polyester-polyurethane, and bending break stiffness is at 4.6 N/mm2, 80 DEG C of tap waters soak the swelling ratio 2.4% after 72 hours；
(3), before bottom layer of polyurethane is not fully cured, the anti-tensile that laterally stretches along mold cores strengthens Kafra fiber yarn Fanglun l414, and simultaneously along longitudinally adding this yarn, makes enhancing Kafra fiber cover bottom layer of polyurethane surface；
(4), before bottom layer of polyurethane is not fully cured, at Kafra fiber thread layers upper sandwich layer polyurethane, Kafra fiber thread layers is closely linked with bottom layer of polyurethane, cast thickness is 1.2 mm, flame froth breaking method is used to guarantee do not have bubble to produce while cast, polyurethane uses QT type polyester-polyurethane, is added with the polyurethane defoamer DF-8205/879 of 0.5%wt in advance；
(5), after sandwich layer layer of polyurethane cools and solidifies, processing sandwich layer layer of polyurethane cured layer is to pre-set dimension；
(6), overlapping core net on the sandwich layer layer of polyurethane processed, core net is woven with polyester fiber or nylon fiber in advance；
(7), set on core net boots sleeve forming mould on rotary casting 4 strata urethane as surface layer layer of polyurethane, flame froth breaking method is used to guarantee do not have bubble to produce while cast, polyurethane uses QX type polyether-polyurethane, it is added with the special defoamer of polyurethane of 0.4%wt in advance, defoamer uses XD-770:DF-8205/879 volume ratio to be the compound prescription of 1:2, cast all should be carried out before preceding layer layer of polyurethane is not fully cured every time, and every layer thickness controls at 1mm；
(8), after surface layer layer of polyurethane cools and solidifies, process and be ground to pre-set dimension, and go out the rill of certain density, the degree of depth 1.2 mm of rill, width 1 mm in its surface turning.
Embodiment
2
This shoe-press roller boots overlap manufacture method, and its step is basically identical with embodiment 1, and its difference is:
In step (2), cast thickness is 1mm, and polyurethane special defoamer adding proportion is 0.1%wt；
In step (4), cast thickness is 1mm, and polyurethane special defoamer adding proportion is 0.1%wt；
In step (7), cast uses QVT type polyether-polyurethane, the surface layer layer of polyurethane cast number of plies is 5 layers, every layer thickness is 0.8mm, is added with the special defoamer of polyurethane of 0.1%wt in advance, and defoamer uses XD-770:DF-8205/879 volume ratio to be the compound prescription of 2:1；
In step (8), the degree of depth of rill is 1mm, and width is 0.7 mm.
Embodiment
3
This shoe-press roller boots overlap manufacture method, and its step is basically identical with embodiment 1, and its difference is:
In step (2), cast thickness is 2.2mm, and polyurethane special defoamer adding proportion is 0.5%wt；
In step (4), cast thickness is 1.5mm, and polyurethane special defoamer adding proportion is 0.7%wt；
In step (7), cast uses QVT type polyether-polyurethane, the surface layer layer of polyurethane cast number of plies is 2 layers, every layer thickness is 1.2mm, is added with the special defoamer of polyurethane of 0.6%wt in advance, and defoamer uses XD-770:DF-8205/879 volume ratio to be the compound prescription of 1:1；
In step (8), the degree of depth of rill is 1.5mm, and width is 1.3 mm.
The shoe-press roller boots that above three embodiment obtains are enclosed within the shoe-press roller of high speed paper machine use, and the papery produced is smooth, complies fully with prescription.
Claims (5)
1. shoe-press roller boots overlap a manufacture method, and its step includes:
(1), cleaning boots sleeve forming mould surface, on boots sleeve forming mould spray releasing agent；
(2), uniformly pouring into a mould bottom polyurethane on boots sleeve forming mould, polyurethane uses PAUR,
Cast thickness is 1～2.2mm, uses flame froth breaking method to guarantee do not have bubble to produce, Qi Zhongju while cast
Being added with polyurethane defoamer in urethane in advance, adding proportion is 0.1～0.5%wt；
(3), before bottom layer of polyurethane is not fully cured, the anti-tensile that laterally stretches along mold cores strengthens triumphant
Husband draws fiber yarn, and simultaneously along longitudinally adding this yarn, completes to strengthen the braiding of Kafra fiber；
(4), before bottom layer of polyurethane is not fully cured, at the Kafra fiber thread layers poly-ammonia of upper sandwich layer
Ester, is closely linked Kafra fiber thread layers with bottom layer of polyurethane, and cast thickness is 1～1.5
Mm, uses flame froth breaking method to guarantee do not have bubble to produce while cast, polyurethane uses PAUR,
It is added with the polyurethane defoamer of 0.1～0.7%wt in advance；
(5), after sandwich layer layer of polyurethane cools and solidifies, processing sandwich layer layer of polyurethane cured layer is to pre-set dimension；
(6), overlapping core net on the sandwich layer layer of polyurethane processed, core net is fine with polyester fiber or nylon in advance
Tie up woven；
(7), set on core net boots sleeve forming mould on rotary casting 3-5 strata urethane as surface layer polyurethane
Layer, uses flame froth breaking method to guarantee do not have bubble to produce while cast, polyurethane uses EU,
Being added with the polyurethane defoamer of 0.1～0.6%wt in advance, each cast all should be the completeest at preceding layer layer of polyurethane
Carrying out before all solidstate, every layer thickness controls 0.8～1.2mm；
(8), after surface layer layer of polyurethane cools and solidifies, processing is ground to pre-set dimension, and in its surface turning
Go out the rill of certain density, the degree of depth 1.0～1.5mm of rill, width 0.7～1.3mm.
Shoe-press roller boots the most according to claim 1 overlap manufacture method, it is characterised in that: step (2)
Middle cast thickness is 2mm, and polyurethane defoamer adding proportion is 0.3%wt.
Shoe-press roller boots the most according to claim 2 overlap manufacture method, it is characterised in that: step (4)
Middle cast thickness is 1.2mm, and polyurethane defoamer adding proportion is 0.5%wt.
Shoe-press roller boots the most according to claim 3 overlap manufacture method, it is characterised in that: step (7)
Middle rotary casting 4 strata urethane is as surface layer layer of polyurethane, and every layer thickness is 1mm, and polyurethane defoamer adds
Adding ratio is 0.4%wt.
Shoe-press roller boots the most according to claim 4 overlap manufacture method, it is characterised in that: step (8)
The degree of depth of middle rill is 1.2mm, and width is 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054517.9A CN103802330B (en) | 2014-02-18 | 2014-02-18 | Shoe-press roller boots overlap manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054517.9A CN103802330B (en) | 2014-02-18 | 2014-02-18 | Shoe-press roller boots overlap manufacture method |
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| Publication Number | Publication Date |
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| CN103802330A CN103802330A (en) | 2014-05-21 |
| CN103802330B true CN103802330B (en) | 2016-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410054517.9A Active CN103802330B (en) | 2014-02-18 | 2014-02-18 | Shoe-press roller boots overlap manufacture method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FI20216016A1 (en) * | 2021-09-30 | 2023-03-31 | Valmet Technologies Oy | Belt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190881A (en) * | 2010-02-19 | 2011-09-21 | 市川株式会社 | Papermaking process belt and method for making the same |
| CN103243602A (en) * | 2012-02-01 | 2013-08-14 | 市川株式会社 | Paper making shoe press belt |
| US20130269895A1 (en) * | 2011-01-31 | 2013-10-17 | Metso Fabrics Inc. | Shoe press belt, method for manufacturing the same, and use in shoe press |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7303656B2 (en) * | 2003-07-02 | 2007-12-04 | Albany International Corp. | Low permeability textile substrate for a two-sided coated product |
| JP4516583B2 (en) * | 2007-05-18 | 2010-08-04 | イチカワ株式会社 | Shoe press belt |
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- 2014-02-18 CN CN201410054517.9A patent/CN103802330B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102190881A (en) * | 2010-02-19 | 2011-09-21 | 市川株式会社 | Papermaking process belt and method for making the same |
| US20130269895A1 (en) * | 2011-01-31 | 2013-10-17 | Metso Fabrics Inc. | Shoe press belt, method for manufacturing the same, and use in shoe press |
| CN103243602A (en) * | 2012-02-01 | 2013-08-14 | 市川株式会社 | Paper making shoe press belt |
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| CN103802330A (en) | 2014-05-21 |
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