CN110962440A - Printing press with reduced blank gap - Google Patents
Printing press with reduced blank gap Download PDFInfo
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- CN110962440A CN110962440A CN201911239616.3A CN201911239616A CN110962440A CN 110962440 A CN110962440 A CN 110962440A CN 201911239616 A CN201911239616 A CN 201911239616A CN 110962440 A CN110962440 A CN 110962440A
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- printing
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- cogwheel
- gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F7/00—Rotary lithographic machines
- B41F7/02—Rotary lithographic machines for offset printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F13/00—Common details of rotary presses or machines
- B41F13/08—Cylinders
- B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
- B41F13/34—Cylinder lifting or adjusting devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rotary Presses (AREA)
Abstract
The invention discloses a printing machine for reducing blank gaps, which comprises a printing cylinder and a driving mechanism, wherein the surface of the printing cylinder is wrapped with an offset plate, the offset plate enables the printing cylinder to form a printing area and a non-printing area, the driving mechanism comprises a driving gear set, the end part of the printing cylinder is provided with a driven gear set, the driving gear set comprises a first printing gear and a first non-printing gear, the diameter of the first non-printing gear is larger than that of the first printing gear, the driven gear set comprises a second printing gear and a second non-printing gear, the second printing gear is provided with printing gear teeth meshed with the first printing gear, the second non-printing gear is provided with non-printing gear teeth meshed with the first non-printing gear, the central angle corresponding to the printing gear teeth is not smaller than that corresponding to the printing area, the printing gear teeth and the non-printing gear teeth are sequentially arranged along the circumference, the invention can accelerate the rotation of the printing cylinder in the non-printing area.
Description
Technical Field
The invention belongs to the field of printing machines, and particularly relates to a printing machine capable of reducing blank gaps.
Background
With the increasing demand for printing accuracy of printed matters such as stickers, liquid liquor packaging boxes (e.g., liquors), and the like, the intermittent web printing machine has become an important means and approach for high-accuracy, low-cost printing. It has a higher printing accuracy, lower plate making costs, and a more flexible adaptation than other web printing presses favored by many printing enterprises.
In the above-mentioned conventional intermittent printing technology, in order to minimize the waste of blank gaps on the paper caused by the gap portions of the PS offset plate, the currently adopted technical means is to perform intermittent feeding back a little in the process of feeding the paper, so as to compensate the gap. Another problem that arises with this method is that it is frequently necessary to back down a little during the feeding of the printing sheets. This reduces the printing speed, accelerates wear of the rotary press, and reduces the life of the rotary press.
Furthermore, when the user is to print large, long runs, the unlimited increase in roll size is not practical in terms of technical and equipment costs due to the large limitations on roll circumference.
Chinese patent application No. 2015104319627 discloses an intermittent forward skip printing machine and a control method and a skip traction device thereof, the printing machine comprises a paper feeding skip traction machine, a paper discharging skip traction machine and two groups of printing groups which are arranged on a frame, wherein the two groups of printing groups are arranged between the paper feeding skip traction machine and the paper discharging skip traction machine, the center distance between the two groups of printing groups is L, and L is an odd multiple of the repeat printing pattern width of a single printing group: the paper feeding length S of one cycle of each printing plate rotation is V1 × T1+ V2 × T2. By adopting the invention, two times of printing is completed in one jump, the printing speed is doubled compared with the traditional intermittent method of backward paper feeding, and the doubling of the printing repetition length range can be realized.
Although the patent makes the waste in the blank clearance on the paper, it adopts paper feed skip step tractor and goes out paper skip step tractor to make the paper after printing a pattern accelerate the forward pay-off and draw in order to form "intermittent type forward skip step", this kind of mode is intermittent type to paper increase pulling force and reduce the pulling force, some paper can't bear this reciprocal intermittent type formula and pull, easy deformation tears even, and paper easily takes place to skid and leads to the distance inaccuracy with paper feed skip step tractor and play paper skip step tractor when abrupt increase pulling force, the phenomenon of overprinting appears.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a printing device which enables a non-printing area to quickly rotate towards paper after printing of a printing cylinder in a printing area and the paper is finished, enables the printing area to quickly return to a position right opposite to the paper, reduces blank gaps, has a stable structure and does not damage the paper.
In order to achieve the purpose, the invention provides the following technical scheme: a printing machine capable of reducing blank gap comprises a printing cylinder and a driving mechanism, wherein the surface of the printing cylinder is wrapped with an offset plate which enables the printing cylinder to form a printing area and a non-printing area, the driving mechanism comprises a driving gear set, the end part of the printing roller is provided with a driven gear set, the driving gear set comprises a first printing gear and a first non-printing gear, the diameter of the first non-printing gear is greater than the diameter of the first printing gear, the driven set of teeth includes a second printing gear and a second non-printing gear, the second printing gear is provided with printing gear teeth which mesh with the first printing gear, the second non-printing gear is provided with non-printing gear teeth which mesh with the first non-printing gear, the central angle corresponding to the printing gear teeth is not less than that corresponding to the printing area, and the printing gear teeth and the non-printing gear teeth are sequentially arranged along the circumference.
The diameters of all the second non-printing gears are sequentially reduced from one side close to the second printing gear, gear teeth on all the second non-printing gears are sequentially arranged along the circumference according to the axial position sequence, and the number and the positions of the first non-printing gears are matched with those of the second non-printing gears.
The number of the second non-printing gears is at least three, the diameters of all the second non-printing gears are sequentially reduced from one side close to the second printing gear and then increased, gear teeth on all the second non-printing gears are sequentially arranged along the circumference according to the axial position sequence, and the number and the positions of the first non-printing gears are matched with those of the second non-printing gears.
Further the driving mechanism further comprises a driving motor and a speed reducer, and the driving gear is connected with an output shaft of the speed reducer.
A printing machine capable of reducing blank gap comprises a printing cylinder and a driving mechanism, wherein the surface of the printing cylinder is wrapped with an offset plate which enables the printing cylinder to form a printing area and a non-printing area, the driving mechanism comprises a driving gear set, the end part of the printing roller is provided with a driven gear set, the driving gear set comprises a first printing gear and a first non-printing gear, the diameter of the first non-printing gear is greater than the diameter of the first printing gear, the driven set of teeth includes a second printing gear and a second non-printing gear, the first print gear is provided with print gear teeth which mesh with the second print gear, the first non-print gear is provided with non-print gear teeth which mesh with the second non-print gear, the central angle corresponding to the printing gear teeth is not less than that corresponding to the printing area, and the printing gear teeth and the non-printing gear teeth are sequentially arranged along the circumference.
Compared with the prior art, the invention has the beneficial effects that: the driving motor outputs constant power, the output is stabilized through the speed reducer, the rotating speed is kept unchanged, the first printing gear of the driving tooth group is meshed with the second printing gear of the driven tooth group, so that the offset plate on the printing cylinder can stably print paper at a constant speed, after printing is finished, the offset plate rolls over the position right opposite to the paper, the non-printing area right faces the paper, at the moment, the first non-printing gear is meshed with the second non-printing gear, the diameter of the first non-printing gear is larger than that of the first printing gear, the diameter of the second non-printing gear is smaller than that of the second printing gear, the rotating speed of the second non-printing gear is accelerated at the moment, namely, the rotating speed of the whole printing cylinder is accelerated, so that the non-printing area is quickly rotated away from the position right opposite to the paper until the first printing gear is meshed with the second printing gear again, and the second non-printing gears are provided with, the stability is improved.
Drawings
FIG. 1 is a perspective view of a printing cylinder in cooperation with a driving gear set according to the present invention;
FIG. 2 is a perspective view of the driving gear set and the driven gear set of the present invention;
FIG. 3 is a front view of the engagement of the driving set of teeth with the driven set of teeth of the present invention;
FIG. 4 is a side view of the engagement of the driving set of teeth with the driven set of teeth of the present invention.
Reference numerals: 1. a printing cylinder; 11. a printing area; 12. a non-printing area; 2. a set of drive teeth; 21. a first printed gear; 22. a first non-printing gear; 3. a driven gear set; 31. a second printed gear; 311. printing gear teeth; 32. a second non-printing gear; 321. non-printing gear teeth.
Detailed Description
An embodiment of the printer for reducing a blank gap according to the present invention will be further described with reference to fig. 1 to 4.
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "a number" or "a number" means two or more unless explicitly specified otherwise.
A printing machine capable of reducing blank gaps comprises a printing cylinder 1 and a driving mechanism, wherein offset plates wrap the surface of the printing cylinder 1, the offset plates enable the printing cylinder 1 to form a printing area 11 and a non-printing area 121, the outer diameter of the printing area 11 is larger than that of the non-printing area 121, the driving mechanism comprises a driving gear set, a driven gear set 3 is arranged at the end part of the printing cylinder 1, the driving gear set 2 comprises a first printing gear 21 and a first non-printing gear 22, the diameter of the first non-printing gear 22 is larger than that of the first printing gear 21, the driven gear set 3 comprises a second printing gear 31 and a second non-printing gear 32, the second printing gear 31 is provided with printing gear teeth 311 meshed with the first printing gear 21, the second non-printing gear 32 is provided with non-printing gear teeth 321 meshed with the first non-printing gear 22, and the central angle corresponding to the printing gear teeth 311 is not smaller than that corresponding to the printing area 11, the printing cog 311 and the non-printing cog 321 are arranged circumferentially in sequence.
At this time, the first printing gear and the first non-printing gear are both full teeth, and the second printing gear and the second non-printing gear are both incomplete gears. .
Preferably, the number of the second non-printing gears 32 is at least two, the diameters of all the second non-printing gears 32 are sequentially reduced from the side close to the second printing gear 31, the gear teeth on all the second non-printing gears 32 are sequentially arranged along the circumference according to the axial position sequence, and the number and the positions of the first non-printing gears 22 are matched with those of the second non-printing gears 32.
Or the number of the second non-printing gears 32 is at least three, the diameters of all the second non-printing gears 32 are sequentially reduced from one side close to the second printing gear 31 and then increased, gear teeth on all the second non-printing gears 32 are sequentially arranged along the circumference according to the axial position sequence, and the number and the positions of the first non-printing gears 22 are matched with those of the second non-printing gears 32.
Preferably, the driving mechanism further comprises a driving motor and a speed reducer, and the driving gear is connected with an output shaft of the speed reducer.
As shown in fig. 3, in the present embodiment, the second non-printing gear 32 is exemplified to have two, and the corresponding first non-printing gear 22 also has two, the first printing gear 21 and the first non-printing gear 22 are connected to the same shaft by a key, the second printing gear 31 and the second non-printing gear 32 are also connected to the same shaft by a key, preferably, the central angle corresponding to the printing gear tooth 311 is the same as the central angle corresponding to the printing region 11, and the sum of the central angles corresponding to the printing gear tooth 311 and the non-printing gear tooth 321 is 360 °.
Now the driving set of teeth is rotated clockwise in direction b and the driven set of teeth 3 is rotated counter clockwise in direction a, for a clear understanding of the invention two second non-printing gears 32 are now designated m-gear and n-gear, respectively, where m-gear is closer to the second printing gear 31 and has a diameter greater than the diameter of n-gear, the non-printing teeth 321 of m-gear start along the end of the printing teeth 311 of the second printing gear 31 and the non-printing teeth 321 of n-gear start along the end of the non-printing teeth 321 of m-gear to the beginning of the printing teeth 311 of the second printing gear 31;
if there are more second non-printing cogs 32, then the non-printing cogs 321 are arranged in sequence.
Example two: a printing machine capable of reducing blank gaps comprises a printing cylinder 1 and a driving mechanism, wherein offset plates wrap the surface of the printing cylinder 1, the offset plates enable the printing cylinder 1 to form a printing area 11 and a non-printing area 121, the driving mechanism comprises a driving gear set, a driven gear set 3 is arranged at the end part of the printing cylinder 1, the driving gear set 2 comprises a first printing gear 21 and a first non-printing gear 22, the diameter of the first non-printing gear 22 is larger than that of the first printing gear 21, the driven gear set 3 comprises a second printing gear 31 and a second non-printing gear 32, the first printing gear 21 is provided with a printing gear tooth 311 meshed with the second printing gear 31, the first non-printing gear 22 is provided with a non-printing gear tooth 321 meshed with the second non-printing gear 32, and the central angle corresponding to the printing gear tooth 311 is not smaller than that corresponding to the printing area 11, the printing cog 311 and the non-printing cog 321 are arranged circumferentially in sequence.
At this time, the first printing gear and the first non-printing gear are incomplete gears, and the second printing gear and the second non-printing gear are full teeth.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (5)
1. The utility model provides a reduce blank clearance's printing machine, includes printing cylinder and actuating mechanism, and printing cylinder surface coating has offset plate, and offset plate makes printing cylinder form printing district and non-printing district, its characterized in that: actuating mechanism is including initiative tooth group, the printing cylinder tip is provided with driven tooth group, drive tooth group includes first printing gear and first non-printing gear, the diameter of first non-printing gear is greater than the diameter of first printing gear, driven tooth group includes second printing gear and second non-printing gear, second printing gear is provided with the printing teeth of a cogwheel with first printing gear engagement, second non-printing gear is provided with the non-printing teeth of a cogwheel with first non-printing gear engagement, the central angle that the printing teeth of a cogwheel correspond is not less than the central angle that the printing district corresponds, and the printing teeth of a cogwheel and the non-printing teeth of a cogwheel are arranged along the circumference in proper order.
2. The printer for reducing white space of claim 1, wherein: the number and the positions of the first non-printing gears are matched with the second non-printing gears.
3. The printer for reducing white space of claim 1, wherein: the number of the second non-printing gears is at least three, the diameters of all the second non-printing gears are sequentially reduced from one side close to the second printing gear and then increased, gear teeth on all the second non-printing gears are sequentially arranged along the circumference according to the axial position sequence, and the number and the positions of the first non-printing gears are matched with the second non-printing gears.
4. A printer for reducing a blank gap according to claim 2 or 3, wherein: the driving mechanism further comprises a driving motor and a speed reducer, and the driving gear is connected with an output shaft of the speed reducer.
5. The utility model provides a reduce blank clearance's printing machine, includes printing cylinder and actuating mechanism, and printing cylinder surface coating has offset plate, and offset plate makes printing cylinder form printing district and non-printing district, its characterized in that: actuating mechanism is including initiative tooth group, the printing cylinder tip is provided with driven tooth group, drive tooth group includes first printing gear and first non-printing gear, the diameter of first non-printing gear is greater than the diameter of first printing gear, driven tooth group includes second printing gear and second non-printing gear, first printing gear is provided with the printing teeth of a cogwheel with second printing gear engagement, first non-printing gear is provided with the non-printing teeth of a cogwheel with second non-printing gear engagement, the central angle that the printing teeth of a cogwheel correspond is not less than the central angle that the printing district corresponds, and the printing teeth of a cogwheel and the non-printing teeth of a cogwheel are arranged along the circumference in proper order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239616.3A CN110962440A (en) | 2019-12-06 | 2019-12-06 | Printing press with reduced blank gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239616.3A CN110962440A (en) | 2019-12-06 | 2019-12-06 | Printing press with reduced blank gap |
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| Publication Number | Publication Date |
|---|---|
| CN110962440A true CN110962440A (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911239616.3A Pending CN110962440A (en) | 2019-12-06 | 2019-12-06 | Printing press with reduced blank gap |
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| CN (1) | CN110962440A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59005163D1 (en) * | 1989-07-08 | 1994-05-05 | Roland Man Druckmasch | Offset printing unit. |
| CN1196455A (en) * | 1997-04-16 | 1998-10-21 | 钟军 | Gear fitted stepless speed change machinery system |
| CN204914847U (en) * | 2015-09-09 | 2015-12-30 | 温州方力机械有限公司 | Printing roller device suitable for local printing |
| CN207310777U (en) * | 2017-08-29 | 2018-05-04 | 广州市瑞文印务有限公司 | A kind of non-circular gear drive formula printing equipment |
| CN109175336A (en) * | 2018-11-06 | 2019-01-11 | 张珠灵 | A kind of variable-ratio topples over the gravity-assist pouring machine casting control device of metal stream |
-
2019
- 2019-12-06 CN CN201911239616.3A patent/CN110962440A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59005163D1 (en) * | 1989-07-08 | 1994-05-05 | Roland Man Druckmasch | Offset printing unit. |
| CN1196455A (en) * | 1997-04-16 | 1998-10-21 | 钟军 | Gear fitted stepless speed change machinery system |
| CN204914847U (en) * | 2015-09-09 | 2015-12-30 | 温州方力机械有限公司 | Printing roller device suitable for local printing |
| CN207310777U (en) * | 2017-08-29 | 2018-05-04 | 广州市瑞文印务有限公司 | A kind of non-circular gear drive formula printing equipment |
| CN109175336A (en) * | 2018-11-06 | 2019-01-11 | 张珠灵 | A kind of variable-ratio topples over the gravity-assist pouring machine casting control device of metal stream |
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Application publication date: 20200407 |
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| RJ01 | Rejection of invention patent application after publication |