CN201752960U

CN201752960U - Multicolor printer

Info

Publication number: CN201752960U
Application number: CN2010202612226U
Authority: CN
Inventors: 曹杨
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-02-05
Filing date: 2010-07-16
Publication date: 2011-03-02
Anticipated expiration: 2020-07-16
Also published as: CN101863170A

Abstract

The utility model discloses a multicolor printer. Vacuum adsorption rollers of a printing stock are at least arranged in front of a first printing unit and at the back of a last printing unit; a plurality of suction passages in axial distribution are arranged below the roller surfaces of the vacuum adsorption rollers; a plurality of suction holes which are communicated with the suction passages below the roller surfaces are arranged on the roller surfaces; the end face of the vacuum adsorption roller right opposite to the sector part of a wrap angle of the printing stock is provided with a suction hood which is used for switching outlets of the suction passages passing through the part and is connected with a vacuum suction machine; and driving wheels on roller shafts of the vacuum adsorption rollers are connected through synchronous belt transmission. Compared with the prior art, the utility model solves the problem that the printing stock is stretched at the printing stage as the tension changes under the printing parameter, so as to cause misregister.

Description

Multicolour press

Technical field

The utility model relates to the printing machinery technical field, especially one has a plurality of printing elements, is the printing machine of raw material of undertaking the printing of with the material of reel form.

Background technology

Printing machine with a plurality of printing elements is when the color separation chromatography, require accurate aligning of stock and printing plate cylinder can reach the printing effect that design needs, when if the unit of this color separation chromatography is a lot, just the chromatography behind a plurality of each printing element of experience is very high to the accurate positioning requirements of stock.The roll type printable fabric is in entering the printing process of printing machine, printable fabric will experience and unreel traction, the rolling traction, the control of multistage tension force such as rolling, each section tension force can change to some extent, this tension variation directly can cause the variation of stock relative length between each section, just stock can produce telescopic variation in the operation of each section of printing machine, stock particularly easily stretches, this phenomenon is just more serious, will directly influence the chromatography quality if this flexible phenomenon occurs in the printing stage that unreels between traction and the rolling traction, just directly cause scrapping of printing when relative length changes above 0.1mm when each printing element of stock process.Therefore controlling printable fabric, decide tension force at printing stage Bao Te weighing apparatus be to guarantee and the counting for much of raising printing quality.Existing have a plurality of printing elements, be to undertake the printing of in the printing machine of raw material with the material of reel form, be provided with many deflector rolls, the effect of these deflector rolls in the stock running be just carrying, guiding and flattening effect in general, its its loading end of deflector roll that only plays guiding, carrying effect be smooth barrel surface as shown in Figure 1; Look like shown in Figure 2 and its loading end of deflector roll with flattening effect is the big two ends of the middle part diameter little smooth cydariform of diameter, or on roll surface, have left and right sides helicla flute as shown in Figure 3.These deflector rolls in printing element are the not driven roll of drive, be with when moving and transporting by stock, deflector roll work does not influence the variation of stock STRESS VARIATION or length, can not guarantee the tension stability of stock in print zone, therefore, can cause stock between each printing element on the print zone, telescopic variation to take place, cause register trouble true.

Summary of the invention

The utility model is dealt with problems and provided a kind of printable fabric with the reel form is the multicolour press of stock, and this printing function reduces stock and keeps comparatively weighing fixed tension force at printing stage, to obtain chromatography effect accurately.

In order to achieve the above object, this multicolour press includes the part that unreels of stock, the printing of a plurality of printing elements and rolling part, on the path of travel of stock, the place ahead and position, at least two place, rear at described printing element are provided with synchronous roller, interconnect by mechanical driving device between the described synchronous roller, consistent with the linear velocity that guarantees roll surface; The pair roller that removes the set synchronous roller in position before first printing element and can be two clamping stocks also can be the vacuum suction roller; Position after first printing element of process, because the printing ink that has just stamped on the stock is not dry as yet, set described synchronous roller can only be provided in a side of the vacuum suction roller of the non-printing of stock side, described vacuum suction roller is that inside is provided with the aspirating unit that is communicated with the vacuum draw machine, and roll surface is provided with the guiding conveying roller of the suction hole of the described aspirating unit of a plurality of connections.This structure make stock and synchronously the friction between the roller obtain to increase significantly, with prevent because of the outside to the tension force of stock with cause stock between printing element, to take place to stretch to the difference of the tension force of stock between the roller synchronously to influence the accurate of chromatography.

In the such scheme, described aspirating unit in the described vacuum suction roller can be provided with many, they are axially-aligned under roll surface, end face at described vacuum suction roller, over against the position, sector of stock cornerite, be provided with and be used for switching through air-suction cover through the described aspirating unit outlet at this position, this air-suction cover is connected with described vacuum draw machine, make the vacuum suction roller only have suction-operated, and do not produce suction for other parts to the part of wrapping described vacuum suction roller roll surface.Above-mentioned whole vacuum suction rollers can be contained in by the bearing on its two side shaft journal on the side plate of printing machine versatilely, and described air-suction cover is fixedlyed connected with the side plate of described printing machine.

Owing to adopted technique scheme, the utility model compared with prior art has following beneficial effect:

1, owing to is provided with synchronous roller in the front and back of printing element, and the synchronous roller at the printing element rear is this structure of vacuum suction roller, and the printing machine that can solve existing a plurality of printing elements causes the true problem of register trouble because of the tension variation of stock in the printing outside.

2, at the end face of described vacuum suction roller, hold the position, sector of position over against stock, be provided with and be used for switching through air-suction cover through the described aspirating unit outlet at this position, these technical characterictics that this air-suction cover is connected with the vacuum draw machine can guarantee stock through the vacuum suction roller time, and the position outside stock holds the position does not influence the stable of machine run because of being adsorbed.

Description of drawings

Fig. 1 is the guide roller on the existing printing machine.

Fig. 2 is one of nip rolls on the existing printing machine.

Fig. 3 be on the existing printing machine nip rolls two.

Fig. 4 is a structural representation of the present utility model.

Fig. 5 is the structural representation of printing in the utility model.

Fig. 6 is the structural representation of vacuum suction roller in the utility model.

Fig. 7 is the profile at A-A place among Fig. 6.

Fig. 8 is the profile at B-B place among Fig. 6.

The specific embodiment

Below in conjunction with the specific embodiment structural principle of the present utility model is described in further detail:

Embodiment 1:

Multicolour press shown in Figure 4 mainly by the double dot dash line frame go out unreel part A, unreel traction element B, printing C, oven dry part D, rolling traction element E and several major parts of rolling part F constitute.Wherein unreel part A, unreel traction element B, oven dry part D, rolling traction element E and several major parts of rolling part F are the relevant portion of existing multicolour press.

Printing C shown in Figure 5 has 8 printing elements, it is

printing element

2,3,4,5,7,8,9,10, stock be roll web 1, on roll web 1 path of travel, a vacuum suction roller 12 was housed before first printing element 2, in the end after a printing element 10 a vacuum suction roller 11 is housed, between the 4th printing element 5 and the 5th printing element 6, a vacuum suction roller 6 is housed also, the structural principle of these vacuum suction rollers is all identical with mounting means, and different is that the hold amplitude of roll web 1 on different vacuum suction rollers is different.Three vacuum suction rollers 6,11,12 are synchronous roller, interconnect by belt transmission between them, are driven by belt pulley 13 by motor 14, and their roll surface speeds when operation are consistent

Shown in Fig. 6,7,8 is the structure and the mounting structure schematic diagram of vacuum suction roller 6.

Vacuum suction roller 6 is made of with the roll shaft portion that is positioned at roller portion main body both sides the roller portion main body in the middle of being positioned at, and outside cylindrical face of main part is the roll surface that is used to contact the carrying roll web in the middle of it, as shown in Figure 6.Under its roll surface, roller portion main body is provided with 16 through holes that connect the axially-aligned of two end faces, and as shown in Figure 7, these 16 through holes are the alleged aspirating unit of the utility model, and the gas outlet of aspirating unit is the opening on the roller portion main body both ends of the surface; Each aspirating unit and roll surface are communicated with equally distributed 29 suction holes outward, shown in Fig. 6,7.Vacuum suction roller 6 respectively is connected with printing machine side plate 18 by a bearing in the roll shaft portion of both sides, wherein on the roll shaft end of a side belt pulley 19 is housed.An air-suction cover 16 respectively is equipped with at two ends in vacuum suction roller 6 roller portion main bodys, air-suction cover 16 middle parts are provided with a through hole, and be sleeved on the outside of vacuum suction roller 6 roll shaft portions by this through hole, air-suction cover 16 is contained on the printing machine side plate 18 regularly by connecting screw rod 17, air-suction cover 16 leaves the 0.05-0.1 mm clearance with the end face of vacuum suction roller 6 roller portion main bodys, air-suction cover 16 is provided with the air-suction cover mouth that is communicated with vavuum pump air intake duct 15 over against the end face coiling paper bag of vacuum suction roller 6 roller portion main bodys around the position of the sector of position P, as Fig. 6, shown in Figure 8.

The vacuum suction roller 11,12 among Fig. 5 and the structure of vacuum suction roller 6 are identical, the aperture position of the air-suction cover mouth of the air-suction cover on being connected vacuum suction roller 11,12 roller portion main body both ends of the surface and size according to roll web 1 surround on the vacuum suction roller 11,12 to hold the position different and different, other connecting screw rod, bearing etc. are all identical with structure shown in Fig. 6-8.Each vacuum suction roller interconnects by belt pulley and the belt that is connected on their roll shafts, and the roll surface rotational line speed of each vacuum suction roller is consistent.

During the work of this printing machine, in the time of on each vacuum suction roller of roll web process, holding the be connected suction hole of vavuum pump air entry of position at it holds, with the outer different tension force of opposing print zone, make two tension force between the vacuum suction roller and gait of march keep relative consistent, in case roll web takes place flexible and causes the chromatography deviation.

Embodiment 2

The multicolour press of present embodiment is compared with the multicolour press of embodiment 1, except the synchronous roller before first printing element is that other parts are identical with the multicolour press of embodiment 1 by the vacuum suction roller 12 among a pair of common roller replacement Fig. 5 that clips the stock two sides.This a pair of conventional roller tube also is connected with the vacuum suction roller with driving belt by belt pulley, and when operation, the linear velocity of its roll surface is identical with the linear velocity of other vacuum suction roller roll surface.

Claims

1. multicolour press, include and unreel part, the printing of a plurality of printing elements and rolling part, it is characterized in that: on the path of travel of stock, the place ahead and position, at least two place, rear at described printing element are provided with synchronous roller, interconnect by mechanical driving device between the described synchronous roller; The set synchronous roller in position that removes before first printing element is a pair of roller or the vacuum suction roller of mutual crimping stock, at the vacuum suction roller that is provided in a side of the non-printing of stock side through the set described synchronous roller in position after first printing element, described vacuum suction roller is that inside is provided with the aspirating unit that is communicated with the vacuum draw machine, and roll surface is provided with the guiding conveying roller of the suction hole of the described aspirating unit of a plurality of connections.

2. multicolour press according to claim 1, it is characterized in that: the described aspirating unit in the described vacuum suction roller has many, these aspirating units are axially-aligned, end face at described vacuum suction roller, position, sector over against the stock cornerite, be provided with and be used for switching through the air-suction cover through the described aspirating unit outlet at this position, this air-suction cover is connected with described vacuum draw machine.

3. multicolour press according to claim 1 and 2 is characterized in that: described vacuum suction roller is contained on the side plate of printing machine versatilely by the bearing on its two side shaft journal, and described air-suction cover is fixedlyed connected with the side plate of described printing machine.