Intaglio printing inking system with low VOC emission

Abstract

The utility model discloses an intaglio printing inking system with low VOC (volatile organic compound) emission, which comprises an inking roller and an ink receiving disc, the inking roller is attached to a printing roller on the opposite side of a doctor blade, the ink receiving disc is arranged below the printing roller, the inking roller is rotatably arranged, and an ink falling port is formed at the lower end of the ink receiving disc; the ink outlet is used for injecting ink into the ink storage tank between the inking roller and the printing roller; the circulating ink pump is used for conveying ink discharged from the ink falling port to the ink outlet, and the position of the circulating ink pump corresponds to the inking roller. The inking system disclosed by the utility model is beneficial to reducing the ink reserve in the printing process, so that the ink is saved, the production cost is reduced, the printing color is kept bright, the VOC emission is reduced, and the solvent consumption is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the intaglio printing equipment field, concretely relates to a low VOC emission's intaglio printing ink system. BACKGROUND

[0002] At present, the intaglio printing equipment adopts the forme cylinder to form the dot (pit) on it, the forme cylinder is soaked in the ink in the ink tray, the ink intrudes into the dot, the ink on the surface of the forme cylinder is scraped by the ink scraper, the ink is left in the dot, the printing rubber roller presses the film or paper on the forme cylinder, and the ink in the dot is transferred to the film;But the ink tray needs to keep more ink (that is, the ink reserve amount in the printing process is large), so that the forme cylinder can be immersed in the ink deep enough, to avoid the ink from not effectively intruding into the dot due to the high-speed rotation of the forme cylinder, so that a large area of ink in the ink tray is exposed to the air, and most of the ink in the ink tray needs to be used for a long time, which is not conducive to keeping the ink bright in color, the solvent in the ink is more volatile, which causes serious environmental pollution, and the solvent volatilization also affects the performance of the ink, which is not conducive to improving the printing quality;In addition, since the ink tray needs to store a large amount of ink, when special color ink (not commonly used ink) is needed, or when small batch printing is carried out, a large amount of ink is wasted;If the area of a single pattern of the printed matter is small, the forme cylinder can be set to a smaller diameter to reduce the cost, but in order to make the forme cylinder immerse in the ink deep enough, the diameter of the forme cylinder must be set larger, which is not conducive to reducing the cost;Therefore, the intaglio printing ink structure of the prior art needs to be improved. SUMMARY

[0003] The utility model aims at overcoming the prior art's insufficient, provide a kind of low VOC emission's intaglio printing ink system, it is conducive to reducing the ink reserve amount in the printing process, it is conducive to reducing VOC emission.

[0004] The utility model discloses a low VOC emission's intaglio printing ink system, including the ink roller of opposite ink scraper heterolateral paste version roll and the ink receiving tray being set below version roll, the ink roller rotation is set, and the lower end of the ink receiving tray is formed with ink outlet;It further includes the ink outlet of the ink storage groove for injecting ink between the ink roller and version roll;It further includes the circulating ink pump for conveying the ink discharged from the ink outlet to the ink outlet, and the circulating ink pump position corresponds to the ink roller.

[0005] The utility model discloses a low VOC emission's intaglio printing ink system, including the ink roller of opposite ink scraper heterolateral paste version roll and the ink receiving tray being set below version roll, the ink roller rotation is set, and the lower end of the ink receiving tray is formed with ink outlet;It further includes the ink outlet of the ink storage groove for injecting ink between the ink roller and version roll;It further includes the circulating ink pump for conveying the ink discharged from the ink outlet to the ink outlet, and the circulating ink pump position corresponds to the ink roller.

[0006] Preferably, the ink receiving disc is formed with flow guide inclined plates and an ink falling groove, the ink falling port is formed at the lower end of the ink falling groove, the number of the flow guide inclined plates is two, the flow guide inclined plate located at the left position is arranged as left high and right low, the flow guide inclined plate located at the right position is arranged as left low and right high, and the ink falling groove is formed with groove walls at the left and right sides respectively, and the upper ends of the groove walls are connected with the corresponding flow guide inclined plates respectively.

[0007] Preferably, the lower side of the ink receiving disc is provided with a bottom disc, the bottom of the bottom disc is provided with an ink returning interface, and the ink returning interface is connected with an ink barrel through an ink returning pipe.

[0008] Preferably, the front part of the ink falling groove and the rear part of the ink falling groove are respectively provided with flow guide end plates, the flow guide end plate located at the front position is arranged as front high and rear low, the flow guide end plate located at the rear position is arranged as front low and rear high, and the ink falling port is located between the front and rear flow guide end plates.

[0009] Preferably, a cavity is formed between the bottom disc and the ink receiving disc, one end of the cavity is provided with a waste gas suction port for connecting a suction fan.

[0010] Preferably, a Teflon surface layer is formed on the ink receiving disc.

[0011] Preferably, the ink feeding system further comprises ink blocking plates arranged at the front and rear ends of the ink storage groove.

[0012] Preferably, the ink feeding roller is formed with an expanded spiral groove.

[0013] Preferably, the ink outlets are arranged in parallel to the direction of the ink feeding roller.

[0014] Preferably, the ink feeding system further comprises a motor assembly, the motor assembly drives the ink feeding roller to rotate, and further comprises a position adjusting assembly for adjusting the gap between the ink feeding roller and the plate roller, and the two ends of the ink feeding roller are respectively connected with the corresponding position adjusting assemblies.

[0015] Compared with the prior art, the ink feeding system has the beneficial effects that: the ink feeding roller abutting the plate roller at the opposite side of the ink scraping knife and the ink receiving disc arranged below the plate roller are arranged to rotate, the lower end of the ink receiving disc is formed with an ink falling port, the ink storage groove arranged between the ink feeding roller and the plate roller is provided with an ink outlet, and the circulating ink pump arranged to transport the ink discharged from the ink falling port to the ink outlet, which is beneficial to reduce the ink storage amount in the printing process and reduce VOC emission. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the ink feeding system.

[0017] Figure 2 It is the top view structural schematic diagram of the ink applying system of the first embodiment of the utility model.

[0018] Figure 3 It is the front view direction's section view structural schematic diagram of the ink receiving disc assembly of the utility model.

[0019] Figure 4 It is the right view direction's section view structural schematic diagram of the ink receiving disc assembly of the utility model.

[0020] Figure 5 It is the front view structural schematic diagram of the ink applying roller and plate roller and ink blocking plate combination of the utility model.

[0021] Figure 6 It is the top view structural schematic diagram of the ink applying system of the second embodiment of the utility model.

[0022] Figure 7 It is the top view structural schematic diagram of the ink applying system of the third embodiment of the utility model.

[0023] Label explanation: ink applying roller 1, ink storage groove 100, expansion spiral groove 101, position adjusting assembly 11, sliding block 111, position adjusting screw 112, guide seat 113, ink blocking plate 12, motor assembly 13, ink outlet 2, ink applying pipe 20, circulating ink pump 3, ink receiving disc 4, flow guide inclined plate 4001, Teflon surface layer 4003, waste gas extraction port 401, ink falling groove 41, ink falling port 4101, groove wall 411, flow guide end plate 412, cavity 40, side baffle 42, bottom disc 5, ink returning interface 51, disc support 6, ink returning pipe 7, ink barrel 8, plate roller 99, printing area 991, blank area 992, ink scraping knife 98, impression rubber roller 97. DETAILED DESCRIPTION

[0024] The utility model will be further described in connection with the drawings.

[0025] The low VOC emission's intaglio printing ink applying system of the utility model, as shown in Figure 1 and Figure 2 , including ink applying roller 1 and ink receiving disc 4 set below plate roller 99 that opposite ink scraping knife 98 is opposite and clings to plate roller 99, that is to say, ink scraping knife 98 and ink applying roller 1 are respectively located at the left and right sides of the central axis of plate roller 99, in Figure 1In this configuration, the film runs from left to right, and the printing roller 99 rotates clockwise during operation. Therefore, the doctor blade 98 is positioned on the left side of the printing roller 99, and the inking roller 1 is located on the right side. When the inking roller 1 is against the printing roller 99, an ink reservoir 100 is formed between the upper part of the inking roller 1 and the printing roller 99. It is preferable that the central axis of the inking roller 1 is at the same height as the central axis of the printing roller 99 to facilitate ink injection into the ink reservoir 100 (if the inking roller 1 is positioned too low, the ink reservoir 100 will be too shallow, causing ink to easily overflow to the right side of the inking roller 1 when ink is injected into the reservoir 100). Figure 1 As shown, the ink roller 1 (around the central axis of the ink roller 1) is rotatably configured, as follows: Figure 4 As shown, an ink discharge port 4101 is formed at the lower end of the ink receiving tray 4; as Figure 1 As shown, the low-VOC emission gravure printing inking system of this utility model also includes an ink outlet 2 for injecting ink into the ink reservoir 100 between the inking roller 1 and the printing roller 99. Since both the printing roller 99 and the inking roller 1 are cylindrical, the ink reservoir 100 has a structure that is wider at the top and narrower at the bottom, and the lower end of the ink reservoir 100 is pointed. Therefore, even if the ink reservoir 100 contains a small amount of ink, the printing roller 99 can still effectively contact the ink. Figure 1 As shown, the low VOC emission gravure printing inking system of this utility model also includes a circulating ink pump 3 for conveying the ink discharged from the ink outlet 4101 to the ink outlet 2, and the position of the circulating ink pump 3 corresponds to the inking roller 1.

[0026] The following is a brief explanation of the working principle of the low-VOC emission gravure printing inking system of this utility model: Figure 1 and Figure 2As shown, the circulating ink pump 3 drives the ink flow, so that the ink outlet 2 discharges ink into the ink pool 100, the ink in the ink pool 100 contacts the roller surface of the plate roller 99, the plate roller 99 rotates clockwise, so that the ink on the plate roller 99 can be carried to the top of the ink pool 100, the ink on the plate roller 99 then rotates to the doctor blade 98, the doctor blade 98 scrapes the excess ink on the roller surface (cylindrical surface) of the plate roller 99, the ink in the screen dot of the plate roller 99 is retained, the printing blanket roller 97 presses the film or paper on the top of the plate roller 99, and the ink in the screen dot is transferred to the bottom of the film or paper; since the ink pool 100 is wide at the top and narrow at the bottom, the ink is squeezed by the ink applicator roller 1 when passing between the plate roller 99 and the ink applicator roller 1, so the ink is easily forced into the screen dot of the plate roller 99 (and the prior art immerses the lower part of the plate roller 99 in the ink, which must have sufficient immersion depth, so that the pressure of the ink can effectively force the ink into the screen dot to avoid insufficient ink in some screen dots), the excess ink scraped by the doctor blade 98 drips onto the ink receiving tray 4, then the ink leaves the ink receiving tray 4 through the ink falling port 4101, and then the ink returns to the circulating ink pump 3, thereby forming an ink circulation (in each cycle, part of the ink is transferred to the film or paper). As described above, since the ink applicator roller 1 is arranged to form the ink pool 100, the ink can effectively enter the screen dot of the plate roller 99, so the total ink reserve required in the ink circulation is greatly reduced, when special color ink is needed, only a small amount of ink needs to be adjusted to complete the printing order, avoiding waste; and avoiding increasing the diameter of the plate roller 99 to immerse the plate roller 99 in the ink to a sufficient depth, which is beneficial to reduce costs; since the total ink reserve required is greatly reduced, avoiding a large amount of ink idle in the ink tray, relatively speaking, new ink can be added (to the ink circulation) more frequently to better maintain the brightness of the printing color; since the method of storing ink by using a large area (from the top view) ink tray is avoided, it is beneficial to reduce VOC emissions, environmental protection, and solvent usage; since the method of immersing the lower part of the plate roller 99 in the ink is avoided, it avoids splashing of the ink when the plate roller 99 rotates at high speed, reduces waste ink, and also helps to keep the working environment clean.

[0027] Further, as shown in Figure 1 , Figure 3 and Figure 4As shown, the ink receiving tray 4 is formed with a flow guide inclined plate 4001 and an ink falling groove 41, an ink falling opening 4101 is formed at the lower end of the ink falling groove 41, the number of the flow guide inclined plate 4001 is two, the flow guide inclined plate 4001 located at the left position is set as left high and right low, the flow guide inclined plate 4001 located at the right position is set as left low and right high, so that the left and right two flow guide inclined plates 4001 form a V-shaped groove structure, the left and right sides of the ink falling groove 41 are respectively formed with a groove wall 411, the upper end of the groove wall 411 is connected with the corresponding flow guide inclined plate 4001, that is to say, the upper end of the groove wall 411 located at the left position is connected with the right end of the flow guide inclined plate 4001 located at the left position, and the upper end of the groove wall 411 located at the right position is connected with the left end of the flow guide inclined plate 4001 located at the right position; so that the ink drops scraped off by the ink scraping knife 98 falls on the corresponding flow guide inclined plate 4001, the ink can flow along the flow guide inclined plate 4001 to the upper end of the ink falling groove 41, and then the ink passes through the ink falling groove 41 and is discharged from the ink falling opening 4101, the above-mentioned flow guide inclined plate 4001 can make the ink quickly converge to the ink falling opening 4101; in order to avoid the ink from leaking out from the front and rear ends of the above-mentioned V-shaped groove, as shown in Figure 3 and Figure 4 the front and rear ends of the above-mentioned V-shaped groove are respectively provided with a side baffle 42.

[0028] In some embodiments, as shown in Figure 1 the lower side of the ink receiving tray 4 is provided with a bottom disc 5, the bottom disc 5 can be a circular arc bottom disc, and the bottom of the bottom disc 5 is provided with an ink returning interface 51; the low VOC emission gravure printing ink feeding system further comprises an ink tank 8, the ink returning interface 51 is connected to the ink tank 8 through an ink returning pipe 7, so that the ink falling through the ink falling groove 41 of the ink receiving tray 4 can be caught by the bottom disc 5 and then flow back to the ink tank 8 through the ink returning interface 51, wherein the circulating ink pump 3 can be a diaphragm pump, the input end of the circulating ink pump 3 is connected to the ink tank 8 through an ink inlet pipe, and the output end of the circulating ink pump 3 is connected to the ink outlet opening 2 through an ink feeding pipe 20.

[0029] In some embodiments, as shown in Figure 3 and Figure 4 the front part of the ink falling groove 41 and the rear part of the ink falling groove 41 are respectively provided with a flow guide end plate 412, the flow guide end plate 412 located at the front position is set as front high and rear low, and the flow guide end plate 412 located at the rear position is set as front low and rear high, and the ink falling opening 4101 is located between the front and rear two flow guide end plates 412, that is to say, the front and rear two flow guide end plates 412 and the left and right two groove walls 411 form a funnel-shaped ink falling groove 41, so that the ink flowing to the front and rear ends of the ink falling groove 41 can converge to the middle (in the front and rear directions) through the flow guide effect of the flow guide end plate 412, and the accumulation of old ink in the ink falling groove 41 can be avoided. As shown in Figure 3 and Figure 4As shown, the ink falling port 4101 can be located directly above the ink return interface 51, facilitating the ink to quickly enter the ink return pipe 7. Since the length of the ink return pipe 7 is large, and the ink return pipe 7 is not vertically arranged along the whole length, the ink flows slowly in the ink return pipe 7 by gravity. If the ink cannot be returned to the ink tank 8 in time due to an accident, the chassis 5 can temporarily store the ink. Since the ink receiving disc 4 is located above the chassis 5, the ink temporarily stored in the chassis 5 can make the solvent component in the ink slowly evaporate (compared to the ink accumulated on the chassis 5).

[0030] Further, as shown in Figure 3 and Figure 4 , a cavity 40 is formed between the chassis 5 and the ink receiving disc 4. One end of the cavity 40 is provided with a waste gas extraction port 401 connected to an air extractor. Thus, the waste gas extraction port 401 can be connected to the input end of the air extractor. When the air extractor is working, a negative pressure is formed at the ink falling port 4101, and the VOC (volatile organic compounds) released by the ink adhering to the lower part of the plate roller 99 can be sucked into the ink falling port 4101. The VOC then passes through the cavity 40 to the waste gas extraction port 401, thereby reducing the VOC content in the air around the plate roller 99 and improving the working environment. The output end of the air extractor can be connected to a filter.

[0031] As shown in Figure 1 and Figure 3 , the ink supply system further includes disc supports 6. The left and right ends of the chassis 5 are respectively welded to the upper ends of the corresponding disc supports 6. The ink receiving disc 4 can be placed on the chassis 5, i.e., the left and right ends of the chassis 5 respectively support the left and right ends of the ink receiving disc 4. Thus, the disc supports 6, the chassis 5, and the ink receiving disc 4 combine to form an ink receiving disc assembly.

[0032] Further, as shown in Figure 3 , the ink receiving disc 4 is formed with a Teflon surface layer 4003, i.e., the upper surface of the flow guide inclined plate 4001 is formed with a Teflon surface layer 4003. The Teflon surface layer 4003 can be formed on the upper surface of the ink receiving disc 4 by spraying, or the Teflon surface layer 4003 can be adhered to the upper surface of the ink receiving disc 4 by adhesive. Since the Teflon surface layer 4003 has a non-stick effect and has a small frictional resistance to ink, the ink dropped on the ink receiving disc 4 can quickly leave the ink receiving disc 4, avoiding the accumulation of old ink on the ink receiving disc 4, and facilitating the cleaning of the ink receiving disc 4 after shutdown.

[0033] Further, as shown in Figure 2 and Figure 5As shown, the inking system further comprises ink blocking plates 12 arranged at the front and rear ends of the ink storage groove 100, and more specifically, the roller surface of the plate roller 99 comprises a printing area 991 (i.e. an area with dots) and a blank area 992, the blank area 992 is arranged at the front and rear sides of the printing area 991, the left end of the ink blocking plate 12 is connected to the blank area 992, the right end of the ink blocking plate 12 is connected to the inking roller 1, the ink blocking plate 12 can be made of polytetrafluoroethylene, which can avoid scratching the plate roller 99 and the inking roller 1, by arranging the ink blocking plate 12, the ink flowing out from the front and rear ends of the ink storage groove 100 can be greatly reduced, which is beneficial to the ink output by the ink outlet 2 being used for printing to the greatest extent. The plate roller 99 is rotatably arranged between the front and rear wall plates, and a support rod can be installed on the wall plate, and one end of the support rod is fixedly connected to the corresponding ink blocking plate 12.

[0034] In some embodiments, as shown in Figure 6 The inking roller 1 is formed with an unwinding spiral groove 101, in other words, when the inking roller 1 rotates, the movement of the unwinding spiral groove 101 is accompanied by axial movement for the ink in the ink storage groove 100, so that the unwinding spiral groove 101 can push the ink away along the direction parallel to the central axis of the inking roller 1, which is beneficial to quickly filling the ink storage groove 100 with ink, and the unwinding spiral groove 101 located at the front of the inking roller 1 can be left-handed, and the unwinding spiral groove 101 located at the rear of the inking roller 1 can be right-handed, so that when the inking roller 1 rotates counterclockwise (in the visual direction), the unwinding spiral groove 101 on the inking roller 1 can push the ink from the middle to the front and rear, which is beneficial to quickly and evenly distributing the ink in the ink storage groove 100. Figure 1

[0035] In some embodiments, as shown in Figure 7 The ink outlets 2 are arranged in parallel to the direction of the inking roller 1, so that a bifurcated structure can be arranged at the end of the inking pipe 20 to divide the ink to each ink outlet 2, which is beneficial to evenly distributing the ink in the ink storage groove 100.

[0036] In some embodiments, as shown in Figure 6 ​As shown, the inking system of the utility model further includes motor assembly 13, motor assembly 13 drives inking roller 1 to rotate;The inking system of the utility model further includes position adjusting assembly 11 for adjusting the gap between inking roller 1 and plate roller 99, and the both ends of inking roller 1 are connected with corresponding position adjusting assembly 11 respectively, and more specifically, position adjusting assembly 11 is provided with sliding block 111, position adjusting screw 112 and guide seat 113, sliding block 111 is slidably connected to guide seat 113, position adjusting screw 112 is screwed to guide seat 113, and sliding block 111 is rotatably connected to position adjusting screw 112, and the both ends of inking roller 1 are rotatably connected with corresponding sliding block 111 through bearings, so that rotating position adjusting screw 112 can drive corresponding sliding block 111 to move left and right, so that inking roller 1 can be positioned close to or away from plate roller 99;When the gap between plate roller 99 and inking roller 1 is small, the thickness of the ink film between plate roller 99 and inking roller 1 is small, and the inking amount is small, under the premise that each dot is filled with ink, the smaller the gap between plate roller 99 and inking roller 1, the smaller the required ink reserve, but the inking stability and solvent evaporation problems need to be considered, if the thickness of the ink film adhered to plate roller 99 is too small, it may lead to poor ink flowability, resulting in problems such as poor cleaning of doctor blade 98 and poor printing transfer effect, therefore, according to the actual situation, the gap between plate roller 99 and inking roller 1 can be 0.5mm to 1mm. Since inking roller 1 can be positioned left and right, when the diameter specification of plate roller 99 changes, inking roller 11 can also be positioned correspondingly by position adjusting assembly 11. Motor assembly 13 can be power-connected to the rear end of inking roller 1 through telescopic universal joint, so that motor assembly 13 can be fixedly installed, and inking roller 11 can be positioned left and right.

[0037] Inking roller 11 can be a rubber roller to avoid accidental scratching of plate roller 99.

Claims

1. A gravure printing inking system with low VOC emissions, characterized by: The upper ink roller (1) and the ink receiving tray (4) are arranged on the opposite side of the relative scraping blade (98) and the plate roller (99), the upper ink roller (1) is rotatably arranged, the lower end of the ink receiving tray (4) is provided with an ink falling port (4101), the ink outlet (2) of the ink storage tank (100) is arranged between the upper ink roller (1) and the plate roller (99), the circulating ink pump (3) is arranged to transport the ink discharged from the ink falling port (4101) to the ink outlet (2), and the position of the circulating ink pump (3) corresponds to the upper ink roller (1).

2. The low VOC emitting gravure printing inking system of claim 1, wherein: The ink receiving tray (4) is provided with a flow guide inclined plate (4001) and an ink falling groove (41), the ink falling port (4101) is formed at the lower end of the ink falling groove (41), the number of the flow guide inclined plate (4001) is two, the left flow guide inclined plate (4001) is arranged as left high and right low, the right flow guide inclined plate (4001) is arranged as left low and right high, and the left and right sides of the ink falling groove (41) are respectively provided with groove walls (411), and the upper ends of the groove walls (411) are respectively connected with the corresponding flow guide inclined plates (4001).

3. The low VOC emitting gravure inking system of claim 2, wherein: The bottom plate (5) is arranged at the lower side of the ink receiving tray (4), the bottom of the bottom plate (5) is provided with an ink return interface (51), the ink barrel (8) is arranged, and the ink return interface (51) is connected with the ink barrel (8) through the ink return pipe (7).

4. The low VOC emitting gravure inking system of claim 3, wherein: The front part of the ink falling groove (41) and the rear part of the ink falling groove (41) are respectively provided with flow guide end plates (412), the front flow guide end plate (412) is arranged as front high and rear low, the rear flow guide end plate (412) is arranged as front low and rear high, and the ink falling port (4101) is located between the front and rear flow guide end plates (412).

5. The low VOC emitting gravure inking system of claim 3, wherein: The cavity (40) is formed between the bottom plate (5) and the ink receiving tray (4), one end of the cavity (40) is provided with a waste gas suction port (401) for connecting with a suction fan.

6. The low VOC emitting gravure inking system according to any one of claims 1 to 5, characterized in that: The ink receiving tray (4) is provided with a Teflon surface layer (4003).

7. The low VOC emitting gravure inking system of claim 1, wherein: The ink blocking plates (12) are arranged at the front and rear ends of the ink storage tank (100).

8. The low VOC emitting gravure inking system of claim 1, wherein: The upper ink roller (1) is provided with an expanded spiral groove (101).

9. The low VOC emitting gravure inking system of claim 1, wherein: The ink outlet (2) is arranged in parallel to the direction of the upper ink roller (1).

10. The low VOC emitting gravure inking system of claim 1, wherein: The motor assembly (13) is arranged to drive the upper ink roller (1) to rotate, the position adjusting assembly (11) is arranged to adjust the gap between the upper ink roller (1) and the plate roller (99), and the two ends of the upper ink roller (1) are respectively connected with the corresponding position adjusting assemblies (11).

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