CN1086171A - Twine the method and apparatus that does not vulcanize felt for offset printing before the sulfuration - Google Patents

Abstract

The present invention relates to twine the apparatus and method of felt for offset printing, do not produce (vestige), the good and uniform felt cylinder of broken line in the stepped portion office to obtain to have compressible, effect in the axial direction, on outer rim, have a reel that step shape part forms, when the beginning winding operation, connect airtight closely on step shape part on the top of sulfuration felt, then, when increasing winding power gradually, the not sulfuration felt that is connected on the described sulfuration felt just is wound in cylinder.

Description

Twine the method and apparatus that does not vulcanize felt for offset printing before the sulfuration

In the manufacture process of the litho felt that is used for offset printing, common way is a felt when being subjected to vulcanizing, and felt is wound in cylinder.Therefore, the present invention relates to before sulfuration, felt is wound in the method and apparatus of cylinder.

In the printing equipment of offset press, comprise, at the ink device that supply printing ink on the plate cylinder of forme is installed, the dampening device of supply water and be installed in litho felt on the blanket cylinder.The litho felt of on blanket cylinder, installing, towards forme be its surface printing layer, and it back side contact blanket cylinder be supporting member.In order to print, to supply with water and supply with printing ink by ink device by dampening device.Be transferred on the felt that is installed on the blanket cylinder at the ink image on the forme, then, be printed on the paper by impression cylinder and felt.

Compressible printing blanket and do not have the non-compression of this compressible stratum all to be used as litho felt with felt.The quality of printing image in both cases all relies on the thickness of surface layer and felt.

Make in the method for litho felt in prior art, in a container, vulcanize, be provided with the cylinder of stacked felt in the container, comprise bafta layer and surface rubber layer.More precisely, be sprayed on the surface rubber layer that forms on the bafta layer with talcum powder, to prevent viscous.With stacked coiled one cylinder, and with a cardboard for example art paper be inserted between stacked that is wound in cylinder.The cylinder of this felt is placed in the sulfuration container and vulcanizes.

When sulfuration finishes, the felt cylinder opened wind to remove cardboard.Because talcum powder has stoped adhesion, cardboard can easily be removed, and behind the removing cardboard, with sand mill or similar device lapped face rubber layer, reaches predetermined, has the surface roughness of very fine and closely woven protuberance.

Usually, surface roughness 10 the height return-to zero systems in by the pin type measurement device at 2 microns in 15 micrometer ranges.

When felt was wound in cylinder, inserting cardboard was owing to following reason:

The first, though spray talcum powder to prevent viscous on surface rubber layer, the use of cardboard can further prevent to adhere to and felt is freed easily.

The second, cardboard absorbs the oily matter that oozes out from surface rubber layer, and prevents that them from sticking on the tissue layer.

The 3rd reason is the gas that generates in the time of being released in sulfuration by cardboard from the side in the axial direction.This is the transmission of promoting so-called gas.Because between curing time, generate a large amount of gas etc. from surface rubber layer, this gas must discharge via the both sides of cardboard from cylinder.

Use cardboard also can adjust the thin thickness of felt.When felt was wound in cylinder, if tissue layer cotton for example, staple fibre or polyester fabric layers directly contacted with compression rubber layer, and surface rubber layer may be compressed and form different thickness so.By inserting cardboard, surface rubber layer can keep uniform thickness.

Shown in Figure 7 felt is wound in the common method of cylinder, twines felt 3 by reel 1 with smooth outer rim.For example rubber adhesive or the plaster of paris adhere to the starting end of felt to anoint ash part 5 on reel.That is to say, when twining felt 3, because the thickness of felt is in the gap that forms between reel and the felt on the height by reel 1, when felt 3 is wound in cylinder, pressure concentrates on the starting end, when felt twines second circle, just forms a broken line (vestige in the stepped portion office).So, use putty spare 5 should be full of the gap that forms felt 3 top ends.Press the thickness anoint ash part 5 of felt 3, then, surface little by little tapered and reel 1 is converged.Should be able to make felt be wound in cylinder and second evenly at the top of felt 3 effect putty spare 5 encloses and respectively encloses thereafter.It also makes the unlikely top that concentrates on felt of pressure, prevents to produce broken line (vestige in the stepped portion office) so to a certain extent.

Yet the commonsense method that felt is wound in cylinder has following problems, twines felt 3 anoints ash part at every turn and must change time-consuming and trouble.When using rubber adhesive to be agent, be difficult to make the compressibility of rubber adhesive to equal the compressibility of felt 3.If rubber adhesive is too soft, certainly as its effect of putty material with malfunctioning.If it is too hard, felt 3 may produce distortion and dent.The plaster of paris is too hard as putty, when felt is wound in cylinder, is easy to damage felt.In a word, it can not avoid producing broken line (vestige at the step shape part place) fully.

In the prior art, it is constant being supplied to the power that felt is wound in cylinder, and like this, in winding process, the pressure that acts on the inner ring of felt becomes bigger, under bigger compression stress, causes the inner ring sulfuration of felt, felt hardening as a result.The compression stress that acts on the outer ring of felt on the reel is different from the compression stress that acts on the inner ring, makes it to obtain even compressible felt in gamut.

Therefore, an object of the present invention is to provide for felt being wound in a kind of method and apparatus of cylinder, to obtain to have good and uniform compressible felt.

Another object of the present invention provides to felt being wound in a kind of method and apparatus that cylinder does not produce broken line (vestige in the stepped portion office).

A further object of the present invention provides to felt being wound in cylinder and having a kind of method and apparatus of promoting operating efficiency.

From narration below in conjunction with accompanying drawing, will fully understand above-mentioned and other purpose and performance of the present invention, shown in accompanying drawing as follows:

Fig. 1 is the side view according to wind of the present invention.

Fig. 2 is the plane according to wind of the present invention.

Fig. 3 is the front view according to wind of the present invention.

Fig. 4 is the view of reel.

Fig. 5 is that explanation is vulcanized felt and do not vulcanized the view how felt is connected.

Fig. 6 is the sectional drawing that shows the reel that twines felt.

Fig. 7 shows the sectional drawing that felt is wound in the commonsense method of cylinder.

For finishing above-mentioned purpose, the present invention has following structure, and characteristics of the present invention are to use the reel that forms stepped part in advance on its outer rim and are beginning spooling place use sulfuration felt.More precisely, reel forms on its outer rim in the axial direction has stepped part, and the apical margin that vulcanizes felt simultaneously connects airtight on stepped part closely so that begin to twine felt.Do not vulcanize felt and be connected on the described sulfuration felt, and in winding process, increase gradually and twine pressure.

When the sulfuration felt connects airtight in stepped part closely so that when beginning to twine, gasket material can be inserted between sulfuration felt and the reel.Gasket material can be wedge shape and little by little and felt at grade and cylinder and close.

The device that twines felt comprises: wind, do not vulcanize the feeder of felt and the feeder of cardboard.Wind comprise in the axial direction the rotating shaft that on its outer peripheral edges, forms reel with stepped part with one by the rotating shaft of transmission system drives and the positive clutch that is connected above-mentioned two rotating shafts that engages by clutch.The described feeder that does not vulcanize felt comprises the rotating shaft of felt reel, and this rotating shaft is connected via connector on the rotating shaft with brake wheel, is twining brake band on described brake wheel.Rotating shaft with brake wheel rotates by transmission system.Be not provided with guide pulley for vulcanizing felt.The feeder of cardboard comprises cardboard reel and guide pulley.On the brake wheel of brake band on the rotating shaft that is arranged on the cardboard reel.

The end face of sulfuration felt connects airtight closely on the step shape part of reel, so that beginning is wound in cylinder to felt, like this, when second circle, will there be step shape part, do not have broken line (vestige) yet, be used to eliminate broken line as the inner ring of sulfuration felt at the step shape part place.By little by little increasing winding power, pressure will act on the whole felt cylinder uniformly.This inner ring compressibility of having eliminated prior art is different from the compressible problem in outer ring, and provides and have good compressible felt cylinder.

Connect the rotating shaft of reel and the rotating shaft of drive system by positive clutch, and rotate/stop reel.Like this, if do not stop drive system, reel can connect/separate.Be wrapped in each brake band regulating action around the feeder that does not vulcanize felt and cardboard at the pressure on the brake wheel and act on the tension force of pulling out on felt and the cardboard, thereby increase/minimizing acts on the pressure on the felt.

Narrate the present invention in more detail referring now to accompanying drawing, winding system 10 comprises pedestal 11, perpendicular to the framework 13 of pedestal 11, on framework 13,, do not vulcanize the feeder 17 of felt and the feeder 19 of cardboard for twining the wind 15 that does not vulcanize felt and cardboard simultaneously.

Wind 15 comprises roll device 20 and drive unit 21.When roll device 20 rotations, twine simultaneously and do not vulcanize felt and cardboard.The two ends of the rotating shaft 25 of reel 23 are contained on the bearing separately 29 on the horizontal frame 27, and framework 27 is located substantially on intermediate altitude.By cutting off the outer peripheral edges that outer peripheral edges form the reel 23 with step shape part 32 in the axial direction, as shown in Figure 4, do not vulcanize felt in order to twine, the end face of sulfuration felt connects airtight closely on step portion 32 and begins winding.

One end of described rotating shaft 25 is connected on the driving shaft 30 via positive clutch 31, drives rotating shaft 30 by described drive unit 21.Axle 30 is contained on the bearing 35, and bearing 35 is along being fixed on the horizontal frame 33 from the extension of rotating shaft 25.Sprocket wheel 37 is fixed on the mid portion of axle 30.Can axially slide and engage at the rotating shaft 25 of transmission one side at the axle 30 of engine one side, like this, in the horizontal direction by rotating tension bar 39, axle 30 just slides and the clutch-plate of engaged/disengaged positive clutch 31 in the axial direction.

Drive unit 21 has following structure.The driving shaft that is installed in the gear motor 40 on the pedestal 11 is connected on the driving shaft of reduction gearing 43 via connector 41.Driving-belt 47 is suspended between the sprocket wheel 37 of the sprocket wheel 45 of deceleration device 43 and roll device 20.Like this, when connecting positive clutch 31,, when gear motor 40 rotations, slow down by deceleration device 43 by the rotation driving reel 23 of driving-belt 47 and sprocket wheel 45.

The feeder 17 that does not vulcanize felt will be described now.The feeder 17 that does not vulcanize felt comprises the roll device 46 that does not vulcanize felt, drive unit 48 and guide pulley 52.More precisely, roll device 46 comprises felt reel 49, the two ends of rotating shaft 50 are installed on the bearing 53 on the fixed head 51 that is fixed in pedestal 11, and felt reel 49 is installed on dismountable rotating shaft 50, and connector 55,57 is installed on the two ends of rotating shaft 50 separately.(referring to Fig. 3).

Connector 55 has brake wheel 59 on its top, and is contained on the bearing 58 on the rotating shaft 60.Another connector 57 has brake wheel 62 on its top and is contained on the bearing 64 of rotating shaft 66.Brake band 61 is suspended on brake wheel 59 and 62, and an end of brake band 61 is connected on the described fixed head 51 closely.And the other end is connected on the bar 65.Bar 65 with the bottom that can make it vertically rotating manner be contained on the fixed head 51.Counterweight 67 is contained near the top of bar 65.Like this, during twining, brake band 61 compresses brake wheel 59 and 62 frequently, and brake wheel prevents that the chance of not vulcanizing felt from sending and adjusting tension force to.

Rotating shaft 60 is connected in sprocket wheel 69, is driven and is rotated by described drive unit 48.At drive unit 48 places, the rotating shaft that is installed in the motor 70 on the pedestal 11 connects the rotating shaft of deceleration device 73 via shaft coupling 71.Driving-belt 77 is suspended between the sprocket wheel 69 of the sprocket wheel 75 of deceleration device 73 and rotating shaft 60.Like this, when drive motor 70, lower its rotary speed by deceleration device 73 rotation driving-belts 77, and rotate felt reel 49 successively.

The guide pulley 52 of feeder 17 comprises two cylinders, and each cylinder is contained on the axillare 80 that is installed on vertical frame 79.Guide pulley 52 guiding and transmission are not vulcanized felt and are emitted to reel 23 from felt reel 79.

Feeder 19 is arranged on the top of described reel 23, and it comprises cardboard reel 81 and guide pulley 83.The rotating shaft 86 of reel 81 is contained on the bearing 85 that is installed on upper frame.Each brake wheel 87 is fixed on the two ends of rotating shaft 86, and brake band 90 is on described brake wheel 87, and the one end is fixed on the support 88 closely, and the other end is fixed on the bar 89.Bar 89 is contained on the described support 88, and its bottom upwards can be rotated at tight Nogata.On the top of bar 89 counterweight 91 is housed.Like this, during the winding of felt, brake band 90 compresses brake wheel 87 frequently, sends and adjust tension force to the chance that prevents cardboard.

To narrate winding system 10 now.Do not vulcanize felt and cardboard in order side by side to twine by wind 15, felt reel 49 must be installed on the feeder 17 in advance, cardboard reel 81 must be contained on the feeder 19 in advance, as shown in Figure 5, do not vulcanize felt 93 by reel 49 windings, be connected with sulfuration felt 95 at its place, end.Like this, at first pull out the outmost turns of sulfuration felt 95, that is to say, twine by guide pulley 52 guiding tissue layer not sulfuration felts inwardly and by reel 23.

Carry out winding operation in the following manner by reel 23.As shown in Figure 6, connect airtight closely on the step shape part of reel 23 on the top of sulfuration felt 95, owing to vulcanize felt and do not depend on that the felt class shape face that will make has different thickness, is inserted between felt and the reel 23 so will adjust the gasket material 93 that thickness uses.If step shape part has bigger height, broken line (vestige at the step shape part place) will appear.So where necessary, use gasket material 97 to be full of the gap.The thickness of gasket material should be selected like this.When felt was not vulcanized in winding, the sulfuration felt was fitted into a plane with step shape part 32 basically.So should be with spongy elastic component.After inserting gasket material, the top of sulfuration felt 95 is connected airtight closely on step shape part and is begun to twine operation.

When beginning to twine sulfuration felt 95, promptly after sulfuration felt 95 twines,, send cardboard to and twine together when beginning to twine when not vulcanizing felt 93.With manually twining first or/or behind second ring manipulation, be transformed into the automated manner operation then.Connect positive clutch 31 by rotating tension bar 39 and be transformed into the automated manner operation.When positive clutch connected, the revolving force of axle 30 was delivered on the rotating shaft 25 of reel 23, and passed through the rotating shaft 25 of gear motor 40 rotating drums 23.

One of characteristics of the present invention are that pulling force increases gradually when felt is not vulcanized in winding.If is constant from the beginning of winding operation up to finishing pulling force, the power that acts on so on the inner ring becomes greatly, and inner ring is tightly pressed together.In order to prevent these, when beginning, contain winding power a little, then, increase gradually.For example, originally selected winding power is meter wide in 60-70 kilogram/2, is increased to median 80-90 kilogram/2 meters wide then, and in the end to increase to 100-110 kilogram/2 meter wide the stage.

Be installed in the position of the counterweight 67 on the bar 65 by conversion, different winding power can be arranged.When to top slip counterweight 67, increase the pressure of brake band 61, do not vulcanize felt from one's body tension force thereby increase to act on.So, when beginning, to its bottom counterweight 67 is set, and slides to the top gradually, increase winding power.Equally, in cardboard feeder 19, when not simultaneously at the pressure of brake wheel 87 place's brake bands 90, can the tension force of corrective action on cardboard by the position of the counterweight 91 of conversion on bar 89.Act on that tension force on the cardboard preferably can be adjusted to and the tension force on felt is basic identical.

When winding operation and tension adjustment end, rotating tension bar 39 separates positive clutches 31, thereby causes the rotating shaft 25 of axle 30 independent rotations and reel 23 to stop the rotation.Can be folded down reel 23 then and transfer to the next procedure of sulfuration.

Has following useful effect from above narrating the present invention as can be known.

When winding operation begins, because the sulfuration felt connect airtight closely reel axially on the step shape part that forms, so do not form broken line (vestige) at the step shape part place, from twining beginning up to end, process along with operation, by little by little increasing winding power, pressure is acted on the reel of felt equably.So last felt will have good compressibility.

In addition, the positive clutch that is arranged on the rotating shaft of reel can make reel optionally rotate/stop.Owing to do not vulcanize the feeder arranged vertical of felt and cardboard, whole system can miniaturization.In not vulcanizing the feeder of felt and in the feeder of cardboard, the brake wheel with brake band is set on reel, like this, and by the different pressure of brake band, can the tension force of corrective action on felt of having pulled out and cardboard.

Claims (6)

1, a kind of method that before sulfuration, is wound in cylinder for the felt of offset printing, it is characterized in that, one reel forms step shape part on axial outer rim, when the beginning winding operation, connect airtight closely on step shape part on the top of sulfuration felt, then, when increasing winding power gradually, the not sulfuration felt that is connected described sulfuration felt is wound in cylinder.

2, method according to claim 1 is characterized in that: when beginning to twine, and insertion gasket material below described sulfuration felt.

3, method according to claim 1 and 2 is characterized in that: it is meter wide that initial winding power is adjusted into 60-70 kilogram/2, and it is meter wide that intermediate value is increased to 80-90 kilogram/2, and in the end to be increased to 100-110 kilogram/2 meter wide the stage.

4, a kind ofly for offset printing the device that felt is wound in cylinder is comprised before sulfuration: wind, do not vulcanize the feeder of felt and the feeder of cardboard, it is characterized in that: described wind comprises reel and drive system; Reel outer peripheral edges in the axial direction forms step shape part, and the rotating shaft of reel is connected by a positive clutch with rotating shaft by drive systems; The described feeder that does not vulcanize felt comprises: the felt reel, and the guide pulley of felt is not vulcanized in drive system and guiding, and the rotating shaft of felt reel is connected with rotating shaft by drive systems by connector; And be provided with brake wheel by the rotating shaft of drive systems, be wound with brake band on it.

5, device according to claim 4 is characterized in that: an end of described brake band is fixed on the fixed head tightly, and its other end is fixed on the bar, and axle journal is established in the bottom of bar can rotate it, and described bar is equipped with slidable counterweight.

6, according to claim 4 or 5 described devices, it is characterized in that the drive system in wind is equipped with deceleration device.

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