CN1074406A - Make the method and the used for this reason vulcanization plant of compressible printing blanket - Google Patents
Make the method and the used for this reason vulcanization plant of compressible printing blanket Download PDFInfo
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- CN1074406A CN1074406A CN 92113358 CN92113358A CN1074406A CN 1074406 A CN1074406 A CN 1074406A CN 92113358 CN92113358 CN 92113358 CN 92113358 A CN92113358 A CN 92113358A CN 1074406 A CN1074406 A CN 1074406A
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- drum
- printing blanket
- steel wire
- sulfuration
- felt
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Abstract
Compressible using in the method for felt constructed in accordance, wherein making the foaming process of blowing agent foaming with a heater is what to be separated with the sulfidation that makes the contained vulcanization of rubber of laminate.This helps controlling foaming degree, prevents bigger air bag, and makes the thickness of compressible stratum even.The vulcanization plant that is used for the method comprises a steel wire, and the one end is other end attaching one counterweight then fixedly, and it is used for lamination felt spare is pressed against on the sulfuration drum.Adopt this vulcanization plant, fully exhaust between curing time, and because very high thrust, last litho felt will have high quality.
Description
The present invention relates to a kind of method of making compressible printing blanket, and used for this reason vulcanization plant, say that more specifically relating to a kind of compressible stratum is by foam process method that forms and the vulcanization plant that is applicable to this manufacture method.
Adopt the presswork of high-speed offset press may further comprise the steps.A felt is installed on the blanket cylinder, faces printed panel with its surface printing layer.It supplies with the aqueous solution by soaking into the unit, supplies with printing ink by the printing ink unit.Ink image on the plate is sent on the felt then, and is printed on one then by on the paper between felt and the impression cylinder.
The compressible printing blanket that has a compressible stratum is commonly used to as litho felt.One compressible printing blanket comprises an enhancement Layer of being made by several skeleton fabrics, and one places the compressible stratum on the enhancement Layer, and one is also made and placed a supporting member and the surface rubber layer as print surface on the compressible stratum by fabric.
For following purpose one compressible stratum is arranged on the litho felt.
At first, it has prevented from " to be blured " by watermark image.When near the print surface the roll gap bears inequality when compressing, final just become unclear by watermark image or " blur " thus since the uneven distribution of compressible stratum authorized pressure it be provided to prevent this bluring.
Second purpose is to prevent " impact ".Compressible stratum alleviates and is absorbed in issuable impact when the paper doll more than two so is input into during the actual print, has therefore just reduced the damage of litho felt and prevents the deterioration of the printing performance of felt.
The 3rd, after the extruding of printing machine roll gap place,, compressible stratum returns to its original thickness at litho felt owing to allowing felt, and print surface flatness and thickness can remain unchanged.
In order to reach these purposes and to obtain clearly image, in high-speed offset press, adopted compressible printing blanket.
As the method that forms described compressible stratum, below three kinds of methods be known in the past.
According to a this method, in the synthetic rubber compound that forms compressible stratum, sneak into a kind of blowing agent, thereby foaming forms ballonet in compressible stratum between the curing time of rubber.According to another kind of method, the gas that will comprise microballoon (its shell is by glass, and phenolic resins or thermoplastic material are made) is sneaked into rubber to form the ballonet of sealing in layer.According to another kind of method, the dusty material (they can by the liquid leaching of water and methyl alcohol and so on) of salt and sugar and so on is sneaked into the synthetic rubber compound, then after sulfuration the leaching powder to form the compressible stratum of band ballonet.
Referring now to Fig. 3, a kind of method of utilizing traditional foam process to make compressible printing blanket is described.Be coated with two or three cottons of rubber adhesive by lamination, staple fibre or polyester fabric and form an enhancement Layer 1 are coated on a synthetic rubber compound layer 3 that contains a kind of blowing agent and be laminated on the described enhancement Layers 1.One supporting member of being made by bafta 5 is laminated thereon to form an intermediate laminate structure 7.Adopt a cutter coating machine 8 or similar device that the one oil resistant rubber layer 9 as print surface is coated on the interlayer structure 7.The lamination felt spare 10 that will be covered with surface rubber layer 9 twines rolling.A maintenance paper 13 is used for protecting surface rubber layer 9 when the felt spare behind the lamination 10 twines rolling.If maintenance paper 13 directly contacts with surface rubber layer 9, sulfuration back it will be bonding and be difficult to it is taken off.So before placing maintenance paper 13, usually talcum powder is sprayed on the rubber layer 5.So just finished laminating technology.
Then, foaming and vulcanisation step will be carried out subsequently.These two steps by felt spare behind the lamination 10 is pressed against on the rotation sulfuration drum 15 and with rotation sulfuration drum 15 integratedly moving member 10 finish.In other words, band roller 17 is positioned at the above and below of sulfuration drum 15 with 18 in vertical mode, and along the latter's axial orientation.Another band roller 19 positions of living in are levels with respect to drum 15.One steel band 20 is driven by these band rollers.Described steel band 20 is wound half that circumference is roused in sulfuration through band roller 17 and 18 basically on sulfuration drum 15, so steel band 20 is driven with the rotation of sulfuration drum 15.
Simultaneously, the lamination felt spare 10 that twines rolling is installed on the axle 6, and is parallel and relative with described steel band 18.Lamination felt spare 10 and steel between drum 15 and steel band 20.Be with 20 together by band roller 17 feedings and guiding, and reel by the winding roller 21 that is positioned at the top position.Like this along with lamination felt spare 10 and sulfuration drum 15 contact and moves its circumference roughly half, lamination felt spare 10 just bears and foams and sulfuration process.So regulate the heating-up temperature and the rotating speed of sulfuration drum 15 like this, promptly foaming and sulfuration process can be finished in the described time cycle.The sulfuration of rubber compound requires with specified value pressurization, and steel band 20 and sulfuration drum 15 are used for compressing lamination felt spare 10 by lamination felt spare 10 is clamped between them for this reason.
The foaming of lamination felt spare 10 and sulfuration are by drum 15 being heated to 140 ℃ to 180 ℃ and rotate the latter with 0.1 to the speed of 1.0m/min and realize.Along with sulfuration drum 15 rotate its circumference roughly half because felt spare 10 rotates with drum 15, the blowing agents in the felt spare 10 are just finished foaming.Simultaneously, the sulfuration of synthetic rubber compound layer 3 is also finished.In case sulfuration is finished, part 10 is just reeled by roller 21, and take out from felt spare 10 position of maintenance paper 13 below roller 21.Because it is bonding to prevent paper that talcum powder is sprayed on the surface rubber layer 9, so can easily take out maintenance paper 13.
In case finish foaming and sulfuration process, just adopt sand paper grinder or similar devices to carry out the polishing on surface, to obtain with the surperficial of level and smooth profile and to remove talcum powder.Surface irregularity is worked into (with pin type photometer measurement) usually and is 2-15 μ m in 10 height RZ.
The said method that adopts traditional foam process to make compressible printing blanket has following defective.
Along with the foaming of the blowing agent in the synthetic rubber compound 3 and the sulfuration of rubber realize simultaneously, formed compressible stratum when sulfuration drum 15 rotates.So just be difficult to control foaming degree so that obtain a very tiny ballonet structure, owing to foaming and vulcanizing and carry out simultaneously when drum 15 moves, so the sulfuration of the very difficult rubber of when foaming degree is best, finishing when lamination felt spare 10 cures.Foaming and sulfuration must realize by the heating-up temperature and the rotating speed of control drum 15.If, the compression foaming, sulfuration just can not be finished.On the other hand, if sulfuration is finished, the excessive so that final ballonet that foaming will be carried out is too big.Optimal conditions may be that different this depends on various other conditions, the thickness of synthetic rubber compound layer 3 and surface rubber layer 9 during lamination for example, the composition of rubber compound, the quantity of solvent and environment temperature.So wanting that in the prior art the sulfuration heating-up temperature of drum 15 and rotating speed are controlled at one, to produce in the stable scope that foams be extremely difficult.Cause the instability foaming of big ballonet to mean the in uneven thickness of compressible stratum and make the deterioration of finished product felt.
In addition, because the evaporation of solvent, sulfuration must be accompanied by the generation of gas, because assembly is can not be discharged fully by this gas of steel band extruding.In the situation of compressible printing blanket, the quantity that gas produces is big especially.Inadequate exhaust just makes and is controlled in the optimum range foaming more difficult.And because steel band is forced to the operation of sulfuration drum, steel band 20 can not apply enough pressure to lamination felt spare 10.The vestige of steel band junction is also shown on the surface of finished product felt.Like this, adopting steel band is unfavorable as the sulfuration process of pressue device for obtaining the high-quality felt.
The present invention In view of the foregoing conceives, and its objective is provides a kind of method of making compressible printing blanket, and it can control the degree of foaming, thereby prevents to form bigger ballonet.
Another object of the present invention provides a kind of method of compressible printing blanket, it can be at any time with the THICKNESS CONTROL of compressible stratum at a set-point.
Also purpose of the present invention provides a kind of vulcanization plant its exhaust fully in sulfidation of making compressible printing blanket.
Also purpose of the present invention provides a kind of vulcanization plant of making compressible printing blanket, and it can apply high pressure in sulfidation.
Also purpose of the present invention provides a kind of method of making high quality printing with felt, and the vulcanization plant that for this reason uses.
In conjunction with the accompanying drawings, from following description, can fully understand these and other objects of the present invention and advantage, wherein:
Fig. 1 is a schematic diagram, has explained manufacturing step of the present invention;
Fig. 2 is the indicative front view according to vulcanization plant of the present invention;
Fig. 3 is a schematic diagram, has explained the step of the manufacturing litho felt of prior art.
In order to reach above purpose, the present invention has following structure.
Feature of the present invention is that foam process is to separate to carry out with sulfuration process.In other words, the step that method of the present invention comprises is lamination one enhancement Layer continuously, and one inserts the synthetic rubber compound layer and a surface rubber layer of blowing agent, adopts heater to make the blowing agent foaming, vulcanizes the rubber in the described laminate, and polished surface.In foaming process, laminate is moved with going barrel with foaming, and concerning sulfidation, laminate is preferably twined rolling and vulcanized in a vulcanizer.
According to the present invention, just after reaching a stable state, vulcanizes foaming process.This just makes that control foaming degree is more easy and prevents to form bigger ballonet, and produces high-quality compressible stratum.
The vulcanization plant that is used to make the method for compressible printing blanket according to the present invention has following structure.Steel wire around sulfuration drum twine its circumference roughly half.One end of steel wire is fixed another free end and then is connected in a counterweight, is pressed against on the drum to allow steel wire.Being lower than the be fixed position on top of side of steel wire, be provided with a deflector roll, with lamination felt spare 10 guiding of thinking between drum and the steel wire, just can vulcanize by compress laminate with steel wire like this.Described vulcanization plant can foam and vulcanize simultaneously, but it also can be used as a device that is used for foam process of the present invention.When vulcanization plant was used alone as foam device, an available vulcanizer vulcanized.
Adopt vulcanization plant of the present invention, the gas that produces when foaming and sulfuration can be discharged easily through steel wire.Because an end of steel wire is fixed, and just can apply enough pressure by suitably regulating counterweight.
Referring now to Fig. 1, with the method for explaining in more detail according to manufacturing compressible printing blanket of the present invention, feature of the present invention is that foaming and sulfidation are carried out as two steps of separating.The laminate that constitutes a litho felt is to form in mode same as the prior art.Three of laminations are coated with the bafta of a rubber adhesive to form an enhancement Layer 31, and lamination one is inserted the synthetic rubber compound layer 33 of blowing agent thereon.Laminated thereon by the supporting member 35 that bafta is made to form an intermediate laminate structure 37.Intermediate laminate structure 37 is applied the oil resistant surface rubber layer 39 as print surface, thereby forms one deck press felt structure 40.
Various known fabrics, as cotton, staple fibre and resin all can be used to form enhancement Layer 31 and supporting member 35.In order to form surface rubber layer, adopt paver, the applying device 38 of cutter coating machine and roller coating machine and so on will be inserted one or more compound (as the curing medium of sulphur, vulcanization accelerator and antiaging agent) oil resistant rubber (as neoprene, nitrile rubber and acrylic rubber) be applied to the thickness of 0.2-0.8mm.Be sprayed on the surface rubber layer 39 talcum powder 41 bonding with the maintenance paper 43 that prevents art paper and so on.With a roll shaft lamination felt spare is rolled then, simultaneously described maintenance paper 43 is placed therebetween.So just having finished lamination process, is foaming process after the lamination process.
In foaming process, a traditional sulfuration drum is used as the drum of a foaming usefulness.Band roller 47 and 48 is positioned at the above and below of sulfuration drum 45 with vertical mode, and with the axial orientation of drum 45.One band roller, 49 present positions are levels with respect to drum 45.The excircle that steel band 50 rouses around sulfuration roughly twines half of its circumference, but just rotating band 50 rotations of the rotation of drum 45 like this.
Lamination felt spare 40 is installed on the axle relative with described band roller 48, and is clamped between drum 45 and the steel band 50 and feeding.Arrange lamination felt spare 40 like this, promptly along with felt spare 40 is being with feeding under roller 47 guiding with steel band 50, felt spare 40 will be rolled by a take up roll that is positioned at the top position.Along with sulfuration drum 45 rotates 40 feedings of lamination felt spare.When drum turned over about 180 °, foaming process was finished.Because foaming process is what to be separated with sulfidation, be in the scope of the best for foaming and blowing agent so the temperature of drum and peripheral speed can be controlled in one.Sulfuration drum 45 for example can be heated to 120 °-150 ° and rotate with the speed of 0.5-1.5m/min.It should be noted that described temperature and rotating speed should be controlled in such scope, promptly the blowing agent rubber that can foam then can not vulcanize.
In case foaming process is finished, just begin sulfidation.Sulfuration realizes by adopting a vulcanizer 55.A volume lamination felt spare 40 that twines rolling with maintenance paper 43 in a last technical process is placed in a traditional vulcanizer 55 in and maintains one to fixed temperature under setting pressure.Owing to just when foaming is finished, just begin sulfidation, so can easily control foaming degree.Along with finishing of sulfidation, in so-called " reeling again " step, take out maintenance paper.The operation of should " reeling again " is to separate maintenance paper 43 and wipe talcum powder off by the felt spare volume of reeling again.Because surface rubber layer 39 can be not bonding so can easily open maintenance paper 43 by the sulfuration process sulfuration.Might between curing time, not adopt maintenance paper 43, in this case, can save described " reeling again " operation and the beginning polishing process.
In polishing process, polished surface rubber layer 39 makes it to have the small surface irregularity of predetermined unevenness.Adopt the burnishing device of sand paper grinder and so on to obtain a kind of like this surface irregularity, promptly measure 10 height B with a pin type photometer
2Interior is 2-15 μ m, is preferably 5-7 μ m
Notable feature of the present invention is during forming compressible stratum by foaming, and foaming and sulfuration are to carry out as the step of separating.The present invention's where face in office all is not intended to limit the structure of felt.Be not restricted to the felt spare that these are strengthened by treble cloths so be to be understood that compressible printing blanket; Do not adopt the fabric that is used for enhancement Layer or supporting course, possess high-tensile a slice paper, for example inject the paper of rubber, brown paper or tympan and can adopt.Also can adopt and have high-tensile plastic sheet.
Describe according to vulcanization plant of the present invention now.
One steel wire 61 around sulfuration drum 60 twine its circumference roughly half, and the upper end of steel wire 61 is fixed with a steady pin 63.One counterweight 65 is dangled from the lower end of steel wire.Described steady pin 63 is maintained at one has the position of enough distances from described drum 60, so lamination felt spare 40 to be vulcanized can insert in it.In other words, steel wire 61 contacts with sulfuration drum 60 in half of its circumferential surface.By changing counterweight 65, can at random change the thrust of steel wire 61, or act on the thrust on the lamination felt spare 40.Mesh size not specially provided in the steel wire 61, but 50-250 purpose steel wire is best.
One deflector roll 67 that is used for lamination felt spare 40 is positioned at steady pin 63 belows, and is relative with drum 60, and identical with the direction of pin.Like this, just can apply enough pressure to lamination felt spare 40, and device itself also can do simple and compact.
For with sulfuration drum 60 sulfuric horizon press felt spares 40, the felt spare 40 that twines rolling is installed on the axle 69.The front end that is installed in the felt spare 40 on the axle 69 is inserted between steady pin 63 and the drum 60 from deflector roll 67 belows, and drum 60 is rotated.Along with drum 60 rotates, laminate 40 is with regard to feeding, and by steel wire 61 clampings.Laminate 40 is twined 3/4ths of its circumferential surface around drum 60, is rolled by a spool 70 then, takes maintenance paper 43 off from laminate simultaneously.
Can find out obviously that from the above description feature of the present invention is that foaming and sulfidation are to carry out as the step of separating, and so just can easily control the degree of foaming, and prevent to form bigger ballonet.The compressible stratum that forms in foaming process will have homogeneous thickness.Employing is used for the vulcanization plant that the present invention makes the method for compressible printing blanket, can be by means of a fixing steel wire but not steel band lamination felt spare is pressed against on the sulfuration drum.This puts on enough pressure on the laminate and helps exhaust with regard to allowing.The advantage of using steel wire is that the vestige of steel band junction can not be presented on the felt.Because steel wire is fixed, the simple and compact advantage that these combinations of the present invention have been arranged that device can be done just can be made high-quality litho felt.
Claims (9)
1, a kind of method of making compressible printing blanket, it is characterized in that following steps: lamination one enhancement Layer continuously, one inserts the synthetic rubber compound layer and a surface rubber layer of blowing agent, adopt a heater to make the blowing agent foaming, vulcanize the interior rubber of described laminate and the surface of polished surface rubber layer.
2, the method for manufacturing compressible printing blanket as claimed in claim 1, wherein said enhancement Layer comprises the fabric of a lamination.
3, the compressible method with felt of manufacturing as claimed in claim 1, wherein said enhancement Layer comprises the high-tensile paper of a slice band.
4, as the method for the described manufacturing compressible printing blanket of claim 1,2 or 3, wherein by a drum being heated to 120 °-150 ℃ and make it to rotate with the speed of 0.5-1.5m/min and make a drum that is used to foam operation be used for foaming process.
5, as the method for the described manufacturing compressible printing blanket of claim 1-4, wherein a vulcanizer is used to sulfidation.
6, a kind of vulcanization plant that is used to make the method for compressible printing blanket, it is characterized in that a steel wire around a sulfuration drum twine this drum circumferential surface roughly half, steel wire is fixed with the one end, and attaching has a counterweight on the other end, thereby be pressed against on the sulfuration drum, the stiff end of steel wire is provided with a deflector roll for the guiding of the lamination felt spare between drum and the steel wire, and bears sulfuration at steel wire applied pressure lower floor press felt spare.
7, the vulcanization plant that is used to make the method for compressible printing blanket as claimed in claim 6, wherein said deflector roll are positioned at the position of the steady pin below of steel wire.
8, as claim 6 or the 7 described vulcanization plants that are used to make the method for compressible printing blanket, the size of wherein said steel wire is in 50-250 purpose scope.
9, as the described vulcanization plant that is used to make the method for compressible printing blanket of claim 6 to 8, the weight of wherein said counterweight can change.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP336186/91 | 1991-11-26 | ||
| JP33618691 | 1991-11-26 | ||
| JP33618591 | 1991-11-26 | ||
| JP336185/91 | 1992-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1074406A true CN1074406A (en) | 1993-07-21 |
| CN1040733C CN1040733C (en) | 1998-11-18 |
Family
ID=26575396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92113358A Expired - Lifetime CN1040733C (en) | 1991-11-26 | 1992-11-25 | Method of manufacturing compressible printing blanket and vulcanization device used therefor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1040733C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432856C (en) * | 2003-03-31 | 2008-11-12 | 株式会社明治橡胶化成 | Image transfer sheet |
| CN102120363A (en) * | 2010-12-06 | 2011-07-13 | 上海创奇特种橡胶制品有限公司 | Rubber production equipment |
| CN105451996A (en) * | 2013-10-16 | 2016-03-30 | Lg化学株式会社 | Blanket manufacturing apparatus and blanket manufacturing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5006400A (en) * | 1988-12-09 | 1991-04-09 | Day International | Printing blanket construction having nontextured surface |
| US4981750A (en) * | 1989-01-23 | 1991-01-01 | W. R. Grace & Co.-Conn. | Printing blanket with lateral stability |
-
1992
- 1992-11-25 CN CN92113358A patent/CN1040733C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432856C (en) * | 2003-03-31 | 2008-11-12 | 株式会社明治橡胶化成 | Image transfer sheet |
| CN102120363A (en) * | 2010-12-06 | 2011-07-13 | 上海创奇特种橡胶制品有限公司 | Rubber production equipment |
| CN105451996A (en) * | 2013-10-16 | 2016-03-30 | Lg化学株式会社 | Blanket manufacturing apparatus and blanket manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1040733C (en) | 1998-11-18 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121125 Granted publication date: 19981118 |