CN218966392U - Printing cylinder of variable specification - Google Patents
Printing cylinder of variable specification Download PDFInfo
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- CN218966392U CN218966392U CN202223315939.6U CN202223315939U CN218966392U CN 218966392 U CN218966392 U CN 218966392U CN 202223315939 U CN202223315939 U CN 202223315939U CN 218966392 U CN218966392 U CN 218966392U
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- side section
- mandrel
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- air inlet
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Abstract
The utility model discloses a printing cylinder with variable specification, which comprises a mandrel, an inner inflation channel, a sleeve and an outer inflation channel. The mandrel comprises a transmission side section, a middle section and an operation side section; the inner inflation channel is arranged on the mandrel and comprises an air inlet hole, an axial air passage and a plurality of air outlet holes; the sleeve comprises an inner sleeve and an outer sleeve; an inner glass fiber bushing is arranged in an inner hole of the inner sleeve and sleeved among the outer surface of the inner side part of the transmission side section, the outer surface of the middle section and the outer surface of the inner side part of the operation side section of the mandrel; an inner hole of the outer sleeve is provided with an outer glass fiber bushing which is sleeved on the outer surface of the inner sleeve; the outer inflation channel comprises an outer axial air inlet channel and an outer radial air inlet channel which are arranged on the transmission side section, an air vent hole, an air vent ring groove, a plurality of outer axial air channels and a plurality of air outlet holes which are arranged on the inner sleeve. The printing cylinder with the variable specification can reduce the manufacturing cost of the sleeve and the labor intensity when the sleeve is replaced.
Description
Technical Field
The present utility model relates to a print cylinder of variable gauge.
Background
With the trend of small batches and multiple batches in the packaging and printing market, in order to adapt to different specifications of printing products, more and more printing machines capable of replacing plate cylinders with different diameters are available, which means that printing factories need to prepare printing sleeves with a plurality of specifications to meet the market demands.
Currently, widely used printing cylinders comprise a mandrel and a sleeve 3 (see fig. 1); the mandrel is three-section and comprises a transmission side section 11, a middle section 12 and an operation side section 13; the middle part of the transmission side section 11 is supported by a transmission end bearing 110 arranged on the transmission end wallboard, and the outer end of the transmission side section 11 is positioned at the outer side of the transmission end wallboard; the outer end of the operation side section 13 is supported by an operation end bearing 130 provided on an operation end wall plate; the two ends of the middle section 12 are sleeved between the inner side end of the transmission side section 11 and the inner side end of the operation side section 13 in a one-to-one correspondence manner; the inside of the mandrel is provided with an inner inflation channel, and the inner inflation channel comprises an air inlet 21 which is radially arranged from the outer surface of the middle part of the transmission side section towards the axis, an axial air passage 22 which is connected at the inner end of the air inlet and is communicated with the inner side part of the operation side section, and a plurality of air outlet holes 23 which are radially and uniformly connected with the front end of the axial air passage 22 and are arranged towards the outer surface of the inner side part of the operation side section; a glass fiber bushing 30 is provided in the inner bore of the sleeve 3, which sleeve 3 is sleeved between the inner outer surface of the transmission side section 11, the outer surface of the intermediate section 12 and the inner outer surface of the operating side section 13. The working principle is as follows:
through the air inlet hole 21 on the transmission side section 11, air is blown out from the plurality of air outlet holes 23 of the operation side section 13 after sequentially passing through the axial air passage 22, so that the glass fiber bushing 30 is expanded under the action of air pressure, a gap is formed between the sleeve 3 and the mandrel, friction force is reduced, and at the moment, the sleeve 3 with different outer diameters can be replaced.
During printing, the glass fiber bushing 2 is contracted without inflating, so that huge friction force is generated between the sleeve 3 and the mandrel, and the sleeve 3 and the mandrel cannot slip to axially move in a stringing way during printing.
When matching with the printing products with different printing specifications, only the sleeves with different outer diameters need to be replaced. However, there are also problems with such printing sleeves: 1. the manufacturing cost of the sleeve is high, especially the sleeve with large diameter; 2. the wall thickness of the sleeve is thicker, and the weight is heavy, so that the sleeve is inconvenient to operate when being replaced.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the printing cylinder with variable specifications, which can effectively reduce the manufacturing cost of the sleeve and reduce the labor intensity when the sleeve is replaced.
The purpose of the utility model is realized in the following way: a printing cylinder with variable specification, which comprises a mandrel, an inner inflation channel, a sleeve and an outer inflation channel;
the mandrel comprises a transmission side section, a middle section and an operation side section;
the inner inflation channel is arranged on the mandrel and comprises an air inlet hole which is formed from the outer surface of the middle part of the transmission side section towards the axis in the radial direction, an axial air passage which is connected at the inner end of the air inlet hole and is communicated with the inner side part of the operation side section, and a plurality of air outlet holes which are uniformly and radially connected with the front end of the axial air passage and are formed towards the outer surface of the inner side part of the operation side section;
the sleeve comprises an inner sleeve and an outer sleeve; wherein, the liquid crystal display device comprises a liquid crystal display device,
an inner glass fiber bushing is arranged in an inner hole of the inner sleeve, and the inner sleeve is sleeved between the outer surface of the inner side part of the transmission side section, the outer surface of the middle section and the outer surface of the inner side part of the operation side section of the mandrel;
an outer glass fiber bushing is arranged in an inner hole of the outer sleeve, and the outer sleeve is sleeved on the outer surface of the inner sleeve;
the outer inflation channel comprises an outer axial air inlet channel, an air vent ring groove, a plurality of outer axial air channels and a plurality of air outlet holes; wherein, the liquid crystal display device comprises a liquid crystal display device,
the outer axial air inlet channel is formed from the outer end surface of the transmission side section of the mandrel to the inner side part of the transmission side section;
the outer radial air inlet hole is connected to the front end of the outer axial air inlet channel and is formed in a radial outward surface;
the vent hole is in an inverted L shape and is arranged on the inner hole surface of the inner sleeve, and the radial part of the vent hole is coaxially communicated with the outer radial air inlet hole on the transmission side section;
the vent ring groove is formed in the front end of the axial part of the vent hole;
a plurality of outer axial air passages are uniformly communicated with the air passage ring grooves;
the outer surfaces of the inner sleeves, which are close to the operation side ends, are radially and uniformly provided with a plurality of outlet air holes, and the inner ends of the outlet air holes are correspondingly communicated with the front ends of the outer axial air passages one by one.
The printing cylinder with the variable specification, wherein the outer surface of the inner side part of the transmission side section of the mandrel is provided with a sealing ring groove respectively at the front side and the rear side of the outer radial air inlet hole, and each sealing ring groove is internally provided with a rubber sealing ring.
The variable gauge print cylinder of the present utility model has the following characteristics: the sleeve sleeved on the mandrel is divided into the inner sleeve and the outer sleeve, an inner inflation channel which can inflate the inner glass fiber bushing in the inner hole of the inner sleeve is formed on the mandrel, and an outer inflation channel of the outer sleeve which inflates the outer glass fiber bushing in the inner hole of the outer sleeve is formed on the mandrel and the inner sleeve, so that the inner sleeve and the outer sleeve are used simultaneously in the application scene of printing small-specification printed matters and in the application scene of printing large-specification printed matters, and the wall thickness of the sleeve which needs to be replaced is reduced only by replacing the outer sleeve when printing large-specification printed matters with different specifications, and the cost is effectively reduced; in addition, the replaced outer sleeve is light in weight, and labor intensity during sleeve replacement is reduced.
Drawings
FIG. 1 is an axial cross-sectional view of a prior art variable gauge print cylinder;
FIG. 2 is an axial cross-sectional view of a variable gauge print cylinder of the present utility model;
fig. 3 is an enlarged view of the portion a in fig. 2.
Detailed Description
The utility model will be further described with reference to the accompanying drawings.
Referring to fig. 2 and 3, the variable gauge print cylinder of the present utility model includes a mandrel, an inner plenum, a sleeve, and an outer plenum.
The mandrel comprises a transmission side section 11, a middle section 12 and an operation side section 13; the middle part of the transmission side section 11 is supported by a transmission end bearing 110 arranged on the transmission end wallboard, and the outer end of the transmission side section 11 is positioned at the outer side of the transmission end wallboard; the outer end of the operation side section 13 is supported by an operation end bearing 130 provided on an operation end wall plate; the two ends of the middle section 12 are sleeved between the inner side end of the transmission side section 11 and the inner side end of the operation side section 13 in a one-to-one correspondence manner.
The inner inflation channel is arranged on the mandrel and comprises an air inlet 21 which is radially arranged from the outer surface of the middle part of the transmission side section 11 towards the axis, an axial air passage 22 which is connected at the inner end of the air inlet 21 and communicated to the inner side part of the operation side section 13, and a plurality of air outlet holes 23 which are radially and uniformly connected with the front end of the axial air passage 22 and are arranged towards the outer surface of the inner side part of the operation side section 12. The air outlet holes 23 are preferably formed in six.
The inside of the mandrel is provided with an air charging channel, the air charging channel comprises an air inlet 21 which is radially arranged from the outer surface of the transmission side section 11 towards the axis, a plurality of air outlet holes 23 which are uniformly distributed and radially arranged from the outer surface of the inner side part of the operation side section 13 towards the axis, and an axial air passage 22 which is connected between the inner end of the air inlet 21 and the inner ends of the air outlet holes 23; the air outlet holes 23 are preferably formed in six.
The sleeve is of a two-layer construction, i.e. comprising an inner sleeve 31 and an outer sleeve 32.
An inner glass fiber bushing 310 is arranged in the inner hole of the inner sleeve 31, and the inner sleeve 31 is sleeved between the outer surface of the inner side part of the transmission side section 11, the outer surface of the middle section 12 and the outer surface of the inner side part of the operation side section 13 of the mandrel;
the inner diameter of the outer sleeve 32 is adapted to the outer diameter of the inner sleeve, an outer glass fibre lining 320 is provided in the inner bore of the outer sleeve 32, and the outer sleeve 32 is fitted over the outer surface of the inner sleeve 31.
The outer inflation channel comprises an outer axial air inlet channel 41, an outer radial air inlet hole 42, an air vent 43, an air vent ring groove 44, a plurality of outer axial air passages 45 and a plurality of outer air outlet holes 46; wherein, the liquid crystal display device comprises a liquid crystal display device,
the outer axial air inlet channel 41 is formed from the outer end surface of the transmission side section 11 of the mandrel to the inner side part of the transmission side section 11;
the outer radial air inlet hole 42 is connected to the front end of the outer axial air inlet channel 41 and is opened towards the outer surface in the radial direction;
the vent hole 43 is in an inverted L shape and is arranged on the inner hole surface of the inner sleeve 31, and the radial part of the vent hole 43 is coaxially communicated with the outer radial air inlet hole 42 on the transmission side section 11;
the vent ring groove 44 is opened at the front end of the axial portion of the vent hole 43;
a plurality of outer axial air passages 45 are radially and uniformly communicated with the air vent ring grooves 44;
the plurality of air outlet holes 46 are radially and uniformly opened on the outer surface of the inner sleeve 31 near the operation side end, and the inner ends of the plurality of air outlet holes 46 are communicated with the front ends of the plurality of outer axial air passages 45 in one-to-one correspondence. The outer axial passages 45 are preferably provided with six, and correspondingly, the outer air holes 46 are also provided with six.
In the variable format printing cylinder of the present utility model, when printing small format prints, the outer sleeve 32 is not required, and only the inner sleeve 31 is required to be heated on the mandrel. When the inner sleeve 31 needs to be replaced, the inner glass fiber bushing 310 is inflated through the inner inflation channel, namely, the air is inflated through the air inlet holes 21 on the transmission side section 11 of the mandrel, and the air sequentially passes through the axial air passage 22 and then is blown out from the plurality of air outlet holes 23 of the operation side section 13, the inner glass fiber bushing 310 in the inner sleeve 31 expands under the action of air pressure, so that a gap is generated between the inner sleeve 31 and the mandrel, friction force is reduced, and at the moment, the inner sleeve 31 with different outer diameters can be replaced.
When printing a large-sized print, the outer sleeve 32 is hot-sleeved on the outer surface of the inner sleeve 31. When the outer sleeve 31 needs to be replaced, the outer glass fiber bushing 320 is inflated through the outer inflation channel, namely, the outer axial air inlet channel 41 on the transmission side section 11 of the mandrel is inflated, air sequentially enters the air vent ring grooves 44 through the outer radial air inlet holes 42 and the air vent holes 43 on the inner sleeve 31, and is distributed to six outer axial air passages 45 through the air vent ring grooves 44, and finally is blown out from the six air outlet holes 46, the outer glass fiber bushing 320 in the outer sleeve 32 expands under the action of air pressure, so that a gap is generated between the outer sleeve 32 and the inner sleeve 31, friction force is reduced, and at the moment, the outer sleeve 32 with different outer diameters can be replaced.
In order to ensure that when the outer sleeve 32 is replaced, the air filled from the outer axial air inlet channel 41 on the mandrel can completely enter the air holes 43 of the inner sleeve 31 through the outer radial air inlet holes 42, a sealing ring groove is respectively formed on the outer surface of the inner side part of the transmission side section 11 of the mandrel and on the front side and the rear side of the outer radial air inlet holes 42, and a rubber sealing ring 40 is arranged in each sealing ring groove so as to form a high-pressure air belt between the two rubber sealing rings 40, so that whether the outer radial air inlet holes 42 on the mandrel and the air holes 43 on the inner sleeve 31 can be aligned coaxially or not can ensure that the outer glass fiber bushing 320 is inflated.
The above embodiments are provided for illustrating the present utility model and not for limiting the present utility model, and various changes and modifications may be made by one skilled in the relevant art without departing from the spirit and scope of the present utility model, and thus all equivalent technical solutions should be defined by the claims.
Claims (2)
1. A printing cylinder with variable specification, which comprises a mandrel, an inner inflation channel, a sleeve and an outer inflation channel; the mandrel comprises a transmission side section, a middle section and an operation side section; the inner inflation channel is arranged on the mandrel and comprises an air inlet hole which is formed from the outer surface of the middle part of the transmission side section towards the axis in the radial direction, an axial air passage which is connected at the inner end of the air inlet hole and is communicated with the inner side part of the operation side section, and a plurality of air outlet holes which are uniformly and radially connected with the front end of the axial air passage and are formed towards the outer surface of the inner side part of the operation side section; it is characterized in that the method comprises the steps of,
the sleeve comprises an inner sleeve and an outer sleeve;
an inner glass fiber bushing is arranged in an inner hole of the inner sleeve, and the inner sleeve is sleeved between the outer surface of the inner side part of the transmission side section, the outer surface of the middle section and the outer surface of the inner side part of the operation side section of the mandrel;
an outer glass fiber bushing is arranged in an inner hole of the outer sleeve, and the outer sleeve is sleeved on the outer surface of the inner sleeve;
the outer inflation channel comprises an outer axial air inlet channel, an air vent ring groove, a plurality of outer axial air channels and a plurality of air outlet holes;
the outer axial air inlet channel is formed from the outer end surface of the transmission side section of the mandrel to the inner side part of the transmission side section;
the outer radial air inlet hole is connected to the front end of the outer axial air inlet channel and is formed in a radial outward surface;
the vent hole is in an inverted L shape and is arranged on the inner hole surface of the inner sleeve, and the radial part of the vent hole is coaxially communicated with the outer radial air inlet hole on the transmission side section;
the vent ring groove is formed in the front end of the axial part of the vent hole;
a plurality of outer axial air passages are uniformly communicated with the air passage ring grooves;
the outer surfaces of the inner sleeves, which are close to the operation side ends, are radially and uniformly provided with a plurality of outlet air holes, and the inner ends of the outlet air holes are correspondingly communicated with the front ends of the outer axial air passages one by one.
2. The variable gauge print cylinder of claim 1, wherein a sealing ring groove is formed on an outer surface of an inner portion of the transmission side section of the mandrel and on a front side and a rear side of the outer radial air intake hole, respectively, and a rubber seal ring is disposed in each sealing ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223315939.6U CN218966392U (en) | 2022-12-09 | 2022-12-09 | Printing cylinder of variable specification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223315939.6U CN218966392U (en) | 2022-12-09 | 2022-12-09 | Printing cylinder of variable specification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218966392U true CN218966392U (en) | 2023-05-05 |
Family
ID=86156013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223315939.6U Active CN218966392U (en) | 2022-12-09 | 2022-12-09 | Printing cylinder of variable specification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218966392U (en) |
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2022
- 2022-12-09 CN CN202223315939.6U patent/CN218966392U/en active Active
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