CN201261294Y - Printing drum - Google Patents
Printing drum Download PDFInfo
- Publication number
- CN201261294Y CN201261294Y CNU2008200302410U CN200820030241U CN201261294Y CN 201261294 Y CN201261294 Y CN 201261294Y CN U2008200302410 U CNU2008200302410 U CN U2008200302410U CN 200820030241 U CN200820030241 U CN 200820030241U CN 201261294 Y CN201261294 Y CN 201261294Y
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- Prior art keywords
- barrel
- cylinder
- printing cylinder
- printing
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a printing cylinder which comprises a cylinder body and a rotating shaft, wherein the rotating shaft is fixedly connected with the axis of the cylinder body, through holes penetrating through the cylinder body are axially arranged in the cylinder body close to the rotating shaft, and strengthening ribs with the same lengths as the through holes are respectively arranged along the axial direction of the cylinder. The printing cylinder enhances the rigidity of the cylinder and prevents the cylinder from generating flexural deflection in a printing process for enabling printing pressure to be uniformly distributed along the axial direction and the circumferential direction of the cylinder so as to improve the quality of printed matter.
Description
Technical field
The utility model belongs to machinery manufacturing technology field, relates to a kind of printer part, is specifically related to a kind of printing cylinder.
Background technology
Printing cylinder is that printing machine is finished the critical component that picture and text shift, and by two printing cylinders that are oppositely arranged, the squeegee pressure that continuously rotates and produce copies to graph text information on the stock by forme, finishes printing work.
Existing printing cylinder is the cylinder of hollow, and its excircle is provided with neutral gear or groove, simultaneously, also is provided with the radiation reinforcement.In the printing process, printing cylinder produces deflection deformation under the effect of self gravitation and squeegee pressure, cause squeegee pressure along drum shaft to skewness, pressure is increased to two ends gradually by the cylinder middle part.This axial compressive force uneven distribution is to cause one of apprehensive reason of trace.Simultaneously, the cylinder pressure at two ends is excessive, has aggravated the wearing and tearing of forme, makes that the local ink amount is excessive, printing net-point increases, the picture and text distortion, influences print quality.In addition, because barrel complex cross-sectional structure causes the circumferential diverse location of barrel, produce different deflection deformations under the effect of squeegee pressure, it is also inhomogeneous to cause the circumferential squeegee pressure of printing cylinder to distribute, and influences the quality of printed matter.
Summary of the invention
The purpose of this utility model provides a kind of printing cylinder, in printing process, improves the situation of squeegee pressure at cylinder axial and circumferential skewness simultaneously, improves print quality.
The technical scheme that the utility model adopted is, a kind of printing cylinder comprises the rotating shaft that barrel and barrel axle center place is connected, and is provided with the through hole that runs through barrel vertically near rotating shaft place in the barrel, in the through hole, along drum shaft to being provided with the reinforcement isometric with through hole.
Feature of the present utility model also is,
The radial direction of reinforcement, its top are towards the axle center of barrel, and the bottom is positioned at the surface of through hole away from barrel axle center one side, and affixed with barrel.
Reinforcement is a circular arc along the cross section of barrel radial direction, and it is connected for the circular arc smooth transition with the junction of barrel, and its arc radius along drum shaft to remaining unchanged.
The beneficial effects of the utility model are the physical dimensions that do not change existing printing cylinder, and reinforcement is set in the through hole of cylinder vertically, and each reinforcement radial dimension is determined according to the circumferential deflection changing value of cylinder.Reduce the circumferential deflection deformation fluctuation of printing cylinder, make squeegee pressure circumferentially evenly distribute, improve printing quality along cylinder.
Description of drawings
Fig. 1 is the structural representation of existing printing cylinder; Wherein, a is an axonometric drawing, and b is that the A of figure a is to view;
Fig. 2 is the structural representation of the utility model printing cylinder; Wherein, a is an axonometric drawing, and b is that the A of figure a is to view;
Fig. 3 is the deflection deformation curve comparison diagram of existing printing cylinder and the utility model printing cylinder.
Among the figure, 1. rotating shaft, 2. through hole, 3. reinforcement, 4. barrel.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The structure of existing press printing cylinder is shown in Fig. 1 a, 1b.Comprise barrel 4, barrel 4 is fixed in rotating shaft 1, and barrel 4 is provided with four through holes 2 that run through barrel 4 vertically, and the cross section of through hole 2 is fan-shaped.
The structure of the utility model printing cylinder is shown in Fig. 2 a, 2b.Comprise barrel 4, barrel 4 is fixed in rotating shaft 1, and barrel 4 is provided with four through holes 2 that run through barrel 4 vertically, in the through hole 2 along drum shaft to being provided with reinforcement 3, its length is identical with the length of through hole 2.Reinforcement 3 in the radial direction, the top is towards the axle center of barrel 4, its bottom is positioned at the surface of through hole 2 away from barrel 4 axle center one side, and it is affixed with barrel 4, this fixing position is the circular arc smooth transition, reinforcement 3 is a circular arc along the cross section of barrel 4 radial direction, and its radius axially remains unchanged along barrel 4.Determine each reinforcement radial dimension in each through hole according to the circumferential deflection variation tendency of cylinder.
The cross section of through hole 2 is fan-shaped on the existing printing cylinder barrel 4, and in actual use, insufficient rigidity produces deflection deformation, causes the axial and circumferential skewness of squeegee pressure along printing cylinder, causes trace apprehensive.Simultaneously, the excessive wearing and tearing that aggravate forme of printing cylinder pressure at two ends cause that the local ink amount is excessive, printing net-point increases, the picture and text distortion, influences print quality.
The utility model printing cylinder by reinforcement 3 is set, improves the rigidity of barrel 4 in through hole 2, improve the deflection deformation of its generation, makes squeegee pressure evenly distribute along the axial and circumferential of cylinder, improves the quality of printed matter.
As the circumferential deflection degree curve contrast of Fig. 3 for existing printing cylinder and the utility model printing cylinder.As can be seen from the figure, the deflection deformation curve of the existing printing cylinder of the deflection deformation curve ratio of the utility model printing cylinder is mild, the circumferential deflection deformation that the utility model printing cylinder is described obviously reduces, and circumferentially squeegee pressure reaches unanimity, and helps improving print quality.
Claims (3)
1. printing cylinder, comprise the rotating shaft (1) that barrel (4) and barrel (4) axle center place is connected, locate to be provided with vertically the through hole (2) that runs through barrel (4) near rotating shaft (1) in the barrel (4), it is characterized in that, in the described through hole (2), along drum shaft to be provided with the isometric reinforcement (3) of through hole (2).
2. printing cylinder according to claim 1 is characterized in that, the radial direction of described reinforcement (3), and its top is towards the axle center of barrel (4), and the bottom is positioned at the surface of through hole (2) away from barrel (4) axle center one side, and affixed with barrel (4).
3. printing cylinder according to claim 1 and 2, it is characterized in that, described reinforcement (3) is a circular arc along the cross section of barrel (4) radial direction, and it is connected for the circular arc smooth transition with the junction of barrel (4), and its arc radius along drum shaft to remaining unchanged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200302410U CN201261294Y (en) | 2008-09-11 | 2008-09-11 | Printing drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200302410U CN201261294Y (en) | 2008-09-11 | 2008-09-11 | Printing drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201261294Y true CN201261294Y (en) | 2009-06-24 |
Family
ID=40807761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200302410U Expired - Fee Related CN201261294Y (en) | 2008-09-11 | 2008-09-11 | Printing drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201261294Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163033A (en) * | 2014-07-23 | 2014-11-26 | 吴中区甪直渡岘工艺品厂 | Integrated printing cylinder |
-
2008
- 2008-09-11 CN CNU2008200302410U patent/CN201261294Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163033A (en) * | 2014-07-23 | 2014-11-26 | 吴中区甪直渡岘工艺品厂 | Integrated printing cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090624 Termination date: 20110911 |