Vacuum belt conveying platform with antifriction positive pressure gas film and operation method

Abstract

The invention discloses a vacuum belt conveying platform with an anti-friction positive-pressure air film and an operation method, and belongs to the field of printing adsorption equipment.The conveying platform comprises two rollers and belts, the two ends of each belt are connected to the two rollers in a tensioned mode respectively, air holes are formed in the belts at intervals, a supporting plate is arranged below the upper-layer belt, and the upper-layer belt and the lower-layer belt are arranged on the supporting plate. The supporting plate is provided with a negative pressure air groove, the negative pressure air groove is connected with a negative pressure air source and used for providing adsorption negative pressure for air holes of the belt, the supporting plate is further provided with a positive pressure air groove, and the positive pressure air groove is connected with a positive pressure air source and used for forming an antifriction air film between the upper-layer belt and the supporting plate. When the positive pressure air source is started, compressed air enters the space between the belt and the supporting plate through the air groove to form a layer of antifriction air film, so that the friction force between the belt and the supporting plate is obviously reduced, the service life of the belt is prolonged, the energy consumption is reduced, the conveying efficiency is improved, and the stability and the reliability of a system are improved.

Description

Technical Field

[0001] The invention belongs to the field of printing adsorption equipment, and in particular relates to a vacuum belt conveying platform with a friction-reducing positive pressure air film and an operation method thereof. Background Art

[0002] The vacuum belt mechanism is an introduction device for moving the print medium through the print zone at high speed. The prior art vacuum belt mechanism typically includes an endless belt that is tensioned between a first roller positioned upstream of the print zone and a second roller positioned downstream of the print zone. The print head assembly is positioned above the upper surface of the belt, and a vacuum blower is positioned below the belt for sucking the print medium onto the upper surface.

[0003] For example, the invention patent application with authorization publication number CN108016832A discloses a vacuum mechanism in a tray conveyor for a printing system, comprising: a track (belt); a tray for supporting a printing substrate and moving on the track; and a vacuum mechanism for selectively applying a vacuum at the tray so that the limit of the vacuum applied at the tray is synchronized with the edge of the printing substrate.

[0004] The setting of the vacuum mechanism requires a support plate to be installed under the upper belt, and a negative pressure channel to be opened on the support plate for connecting to the negative pressure gas source. To ensure the effectiveness of adsorption, the support plate needs to be as close to the upper belt as possible. However, when the parts to be printed are placed on the belt, the belt is likely to contact the support plate due to the dual effects of gravity and adsorption force, resulting in greater friction between the belt and the support plate, which in turn causes problems such as increased belt wear, increased power consumption, and unstable transportation. Summary of the invention

[0005] The purpose of the present invention is to provide a vacuum belt conveyor platform and operation method with a friction-reducing positive pressure air film to solve the problems of existing vacuum belt mechanisms such as large friction between the belt and the support plate, increased belt wear, large power consumption, and unstable conveying.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows: The present invention relates to a vacuum belt conveying platform with a friction-reducing positive-pressure air film, which comprises two rollers and a belt, wherein the two ends of the belt are respectively tensioned and connected to the two rollers, and air holes are arranged at intervals on the belt. A support plate is arranged below the upper belt, and a negative-pressure air groove is arranged on the support plate, which is connected to a negative-pressure air source and is used to provide adsorption negative pressure to the air holes of the belt. A positive-pressure air groove is also arranged on the support plate, which is connected to a positive-pressure air source and is used to form a friction-reducing air film between the upper belt and the support plate.

[0007] Preferably, the positive-pressure air grooves are provided in a plurality of groups, each group of positive-pressure air grooves comprises a plurality of positive-pressure air grooves, and the negative-pressure air grooves are provided between two adjacent groups of positive-pressure air grooves.

[0008] Preferably, the multiple positive pressure gas grooves in the same group of positive pressure gas grooves are distributed in a symmetrical structure, and the width of each positive pressure gas groove gradually decreases from the middle to both sides according to the distribution position.

[0009] Preferably, the width of the negative pressure air slot is greater than the width of any positive pressure air slot.

[0010] Preferably, a pressure sensor and a control valve are provided at the notch of the positive pressure gas groove, the pressure sensor is used to detect the pressure in the positive pressure gas groove, and the control valve is used to adjust the pressure in the positive pressure gas groove.

[0011] The present invention also relates to an operating method of a vacuum belt conveyor platform with a friction-reducing positive-pressure air film, which comprises: starting a roller to drive the belt to operate; starting a negative-pressure air source, which provides an adsorption negative pressure to the air holes of the belt through a negative-pressure air groove, for vacuum adsorption of devices on the belt; at the same time, starting a positive-pressure air source, which forms a friction-reducing air film between the upper belt and the support plate through the positive-pressure air groove, for reducing the friction between the belt and the support plate.

[0012] Preferably, a pressure sensor and a control valve are provided at the notch of the positive pressure gas groove. After the positive pressure gas source is started, the pressure sensor detects the pressure in the positive pressure gas groove, and the control valve adjusts the pressure in the positive pressure gas groove based on the deviation between the actual pressure value in the positive pressure gas groove and the design pressure value.

[0013] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The vacuum belt conveyor platform with a friction-reducing positive-pressure air film involved in the present invention is based on a traditional vacuum belt mechanism, and a positive-pressure air groove is arranged on a support plate. The positive-pressure air groove is connected to a positive-pressure air source and is used to form a friction-reducing air film between the upper belt and the support plate, that is, a positive-pressure system is added. When the positive-pressure air source is turned on, compressed air enters the space between the belt and the support plate through the air groove to form a friction-reducing air film, which significantly reduces the friction between the belt and the support plate, increases the service life of the belt, reduces energy consumption, increases the conveying efficiency, and improves the stability and reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of a vacuum belt conveying platform with a friction-reducing positive pressure air film according to the present invention; Figure 2 It is a partial cross-sectional view of the support plate and the belt; Figure 3 Schematic diagram of the formation of friction-reducing air film.

[0015] Figure numerals: 1-roller, 2-belt, 3-air vent, 4-support plate, 5-negative pressure air groove, 6-positive pressure air groove, 7-friction reducing air film, 8-negative pressure air source, 9-positive pressure air source. DETAILED DESCRIPTION

[0016] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0017] See attached Figure 1 and attached Figure 2 As shown, the present invention relates to a vacuum belt conveying platform with a friction-reducing positive pressure air film, comprising two rollers 1 and a belt 2, wherein one roller 1 is a power roller, and the other roller 1 is a driven roller, and the two ends of the belt 2 are respectively tensioned and connected to the two rollers 1, and air holes 3 are arranged at intervals on the belt 1, and a support plate 4 is provided below the upper belt, and a negative pressure air groove 5 is provided on the support plate 4, and the negative pressure air groove 5 is connected to a negative pressure air source 8 for providing adsorption negative pressure to the air holes of the belt 2, and a positive pressure air groove 6 is also provided on the support plate 4, and the positive pressure air groove 6 is connected to a positive pressure air source 9 for forming a friction-reducing air film 7 between the upper belt 2 and the support plate 4; the negative pressure air source 8 and the positive pressure air source 9 can be fixed on the bottom surface of the support plate 4, or an external air source can be used and respectively connected to the negative pressure air groove 5 and the positive pressure air groove 6 through a gas channel.

[0018] See attached Figure 2 As shown, the positive-pressure air grooves 6 are arranged in multiple groups, each group of positive-pressure air grooves 6 includes multiple positive-pressure air grooves 6, and the negative-pressure air grooves 5 are arranged between two adjacent groups of positive-pressure air grooves; the multiple positive-pressure air grooves 6 in the same group of positive-pressure air grooves 6 are distributed in a symmetrical structure, and the width of each positive-pressure air groove 6 gradually decreases from the middle to both sides according to the distribution position; the width of the negative-pressure air grooves 6 is greater than the width of any positive-pressure air grooves 5, and the width of the negative-pressure air grooves 5 is the same as the width of the air vents 3.

[0019] A pressure sensor and a control valve are provided at the notch of the positive pressure gas groove 6 . The pressure sensor is used to detect the pressure in the positive pressure gas groove 6 , and the control valve is used to adjust the pressure in the positive pressure gas groove 6 .

[0020] See attached Figure 3As shown, the operation method of the vacuum belt conveyor platform with the anti-friction positive pressure air film includes: starting the roller 1 to drive the belt 2 to operate, thereby driving the transportation of the components on the belt 2; starting the negative pressure air source 8, the negative pressure air source 8 provides adsorption negative pressure to the air holes 5 of the belt 2 through the negative pressure air groove 5, which is used for vacuum adsorption of the components on the belt 2; at the same time, starting the positive pressure air source 9, the positive pressure air source 9 forms a friction-reducing air film 7 between the upper belt 2 and the support plate 4 through the positive pressure air groove 6, and the friction-reducing air film 7 is used to reduce the friction between the belt 2 and the support plate 4, thereby increasing the service life of the belt 2, reducing energy consumption, improving the conveying efficiency, and improving the stability and reliability of the system. In the process of providing positive pressure, the pressure sensor detects the pressure in the positive pressure air groove 6, and the control valve adjusts the pressure in the positive pressure air groove based on the deviation between the actual pressure value in the positive pressure air groove 6 and the design pressure value, that is, adjusts the output of the positive pressure air source 9. The design pressure value of the so-called positive pressure air groove 6 should be able to form a friction-reducing air film 7 of uniform thickness between the belt 2 and the support plate 4, and avoid the positive pressure provided by the positive pressure air groove 6 blowing up the components when the air vent moves to the position of the positive pressure air groove 6.

[0021] The present invention is described in detail above in conjunction with the embodiments, but the contents described are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A vacuum belt conveyor platform with a friction-reducing positive pressure air film, comprising two rollers and a belt, the two ends of the belt are respectively tensioned and connected to the two rollers, the belt is provided with air holes at intervals, a support plate is provided below the upper belt, a negative pressure air groove is provided on the support plate, the negative pressure air groove is connected to a negative pressure air source, and is used to provide adsorption negative pressure to the air holes of the belt, characterized in that: The support plate is also provided with a positive pressure air groove, which is connected to a positive pressure air source and is used to form a friction-reducing air film between the upper belt and the support plate.

2. The vacuum belt conveyor platform with anti-friction positive pressure air film according to claim 1, characterized in that: The positive pressure air grooves are arranged in a plurality of groups, each group of positive pressure air grooves comprises a plurality of positive pressure air grooves, and the negative pressure air grooves are arranged between two adjacent groups of positive pressure air grooves.

3. The vacuum belt conveyor platform with anti-friction positive pressure air film according to claim 2, characterized in that: The multiple positive pressure gas grooves in the same group of positive pressure gas grooves are distributed in a symmetrical structure, and the width of each positive pressure gas groove gradually decreases from the middle to both sides according to the distribution position.

4. The vacuum belt conveyor platform with anti-friction positive pressure air film according to claim 1, characterized in that: The width of the negative pressure air slot is greater than the width of any positive pressure air slot.

5. The vacuum belt conveyor platform with anti-friction positive pressure air film according to claim 1, characterized in that: A pressure sensor and a control valve are provided at the notch of the positive pressure gas groove. The pressure sensor is used to detect the pressure in the positive pressure gas groove, and the control valve is used to adjust the pressure in the positive pressure gas groove.

6. An operating method of the vacuum belt conveyor platform with a friction-reducing positive pressure air film according to claim 1, characterized in that: It includes: The starting roller drives the belt to run; Start the negative pressure air source, which provides adsorption negative pressure to the air holes of the belt through the negative pressure air groove, which is used for vacuum adsorption of devices on the belt; at the same time, start the positive pressure air source, which forms a friction-reducing air film between the upper belt and the support plate through the positive pressure air groove, which is used to reduce the friction between the belt and the support plate.

7. The method for operating the vacuum belt conveyor platform with a friction-reducing positive pressure air film according to claim 6, characterized in that: A pressure sensor and a control valve are provided at the notch of the positive pressure gas groove. After the positive pressure gas source is started, the pressure sensor detects the pressure in the positive pressure gas groove, and the control valve adjusts the pressure in the positive pressure gas groove based on the deviation between the actual pressure value in the positive pressure gas groove and the designed pressure value.

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