Method for manufacturing gravure printing plate roller

Abstract

The present application discloses a method for manufacturing a gravure printing plate roller, and relates to the technical field of gravure printing rollers, and comprises the following steps: step 1, pre-treatment of a steel roller embryo, grinding the surface of the steel roller embryo by wet grinding, first grinding with a 100# grinding head, and when the surface roughness of the steel roller embryo is lower than 0.3ra, grinding with a 6000# grinding head until the surface roughness of the steel roller embryo is lower than 0.1ra; step 2, coating the surface of the steel roller embryo with glue; step 3, laser engraving; step 4, immersion and corrosion of the steel roller embryo; step 5, cleaning the steel roller embryo; step 6, chrome plating the steel roller embryo. The present application can directly use the surface of the steel roller embryo as an engraving working layer, which is conducive to saving the processing cost and wastewater treatment work corresponding to setting a nickel layer and a copper layer on the surface of the steel roller embryo.

Description

Technical Field

[0001] The present application relates to the field of gravure printing rollers, and in particular to a method for manufacturing a gravure printing roller. Background Art

[0002] Gravure printing is a printing method in which the entire surface of the printing plate is covered with ink, the ink in the blank area is scraped off, leaving ink only in the grid of the graphic part, and then the ink is transferred to the surface of the substrate to obtain a printed product.

[0003] Most of the gravure printing plates are made on the surface of the plate roller, using a round-on-round printing method. The existing gravure printing plate roller includes a steel roller body. Usually, if the steel roller body is directly used as the engraving working layer, the surface finish of the steel roller is not smooth enough, and it is difficult to meet the printing requirements; when coating the anti-corrosion rubber layer, it is difficult to coat the steel roller surface evenly, and the bonding ability between the steel roller and the corrosion rubber layer is poor, which is prone to glue falling off, affecting the engraving. Based on the above situation, the common steel roller body is currently provided with a nickel layer, a copper layer and a chromium layer from the inside to the outside on the circumferential surface. The copper layer is used as the engraving working layer. The setting of the nickel layer and the copper layer increases the production cost, and the production wastewater treatment is troublesome, and the environmental protection effect is poor. Summary of the invention

[0004] In order to solve the problems of increased cost and poor environmental protection effect caused by nickel plating and copper plating processes in the production process of gravure printing plate rollers, the present application provides a method for producing a gravure printing plate roller.

[0005] The present application provides a method for manufacturing a gravure printing plate roller using the following technical solution:

[0006] A method for manufacturing a gravure printing plate roller comprises the following steps: step 1, pre-treating a steel roller embryo, grinding the surface of the steel roller embryo by wet grinding, first grinding with a 100# grinding head, and when the surface roughness of the steel roller embryo is lower than 0.3ra, grinding with a 6000# grinding head until the surface roughness of the steel roller embryo is lower than 0.1ra; step 2, coating the surface of the steel roller embryo with glue; step 3, laser engraving; step 4, immersing and corroding the steel roller embryo; step 5, cleaning the steel roller embryo; step 6, chrome-plating the steel roller embryo.

[0007] By adopting the above technical scheme, the prior art usually adopts the order of 800# and then 6000# grinding heads for grinding, but this grinding method is difficult to achieve the roughness requirement of 0.1-0.05ra required by the technical scheme. The present application first uses a 100# grinding head for grinding, and when the surface roughness of the steel roller blank is 0.2-0.3ra, it is then ground with a 6000# grinding head, which can make the surface of the steel roller blank reach the roughness requirement of 0.1-0.05ra, so that the surface of the steel roller blank reaches the smoothness required for printing, and the surface of the steel roller blank can be evenly attached with anti-corrosion glue, and at the same time, the bonding force between the anti-corrosion glue and the surface of the steel roller blank can be guaranteed, so as to facilitate the subsequent laser engraving to remove the corrosion-resistant glue of the corresponding printing plate image part, so that the surface of the steel roller blank can be corroded with the printing plate image. By directly using the surface of the steel roller blank as the engraving working layer, it is beneficial to save the processing cost and wastewater treatment work corresponding to the nickel layer and copper layer set on the surface of the steel roller blank, which is beneficial to environmental protection.

[0008] Optionally, the cutting fluid used in the grinding process in step 1 includes sodium hydroxide and water, and the pH of the cutting fluid is 9-12.

[0009] By adopting the above technical scheme, by using alkaline cutting fluid containing sodium hydroxide for wet grinding, the sodium hydroxide solution can form a continuous oxide film on the surface of the steel roller embryo, which can cool the steel roller body and prevent rust during the grinding process.

[0010] Optionally, in step 4, the steel roller blank is corroded by semi-immersion in nitric acid, and the steel roller blank is rotated during the immersion corrosion process.

[0011] By adopting the above technical scheme, the steel roller blank is corroded in a rotating and semi-immersed manner, so that the outer peripheral surface of the steel roller blank can be evenly and fully subjected to immersion corrosion. At the same time, corrosion in a semi-immersed manner is beneficial to the usage of nitric acid, thereby helping to save costs.

[0012] Optionally, when the steel roller blank is immersed and corroded in step 4, the time for corroding the surface of the steel roller blank by one unit depth is set as the unit time, and the duration of corrosion is predicted based on the grid depth required to be corroded on the surface of the steel roller blank. When the actual corrosion time of the steel roller blank is about to enter the last unit time, the grid depth is measured, and then the time required to continue corrosion is calculated based on the difference between the measured actual grid depth and the designed grid depth, and then the steel roller blank is corroded until completion.

[0013] By adopting the above technical solution, the immersion corrosion time of the roller embryo of the steel roller can be more accurately controlled, which is beneficial to more accurately control the grid depth of the steel roller grid, thereby facilitating the quality of printing.

[0014] Optionally, in step 4, the corrosion process of the steel roller blank is carried out in a forward and reverse cycle repeatedly.

[0015] By adopting the above technical solution, through the alternating conversion of forward and reverse rotation, it is beneficial to maintain the uniformity of corrosion on the steel roller blank, reduce the corrosion marks formed by long-term corrosion in the same direction, and reduce the impact of corrosion marks on subsequent printing.

[0016] Optionally, during the cleaning process of step 5, the steel roller blank is first cleaned with dilute hydrochloric acid to remove the anti-corrosion adhesive layer, then cleaned with industrial alcohol for 8-12 minutes, then cleaned with water for 8-12 seconds, and then cleaned with industrial alcohol for 50-70 seconds, and then the steel roller blank is blown dry.

[0017] By adopting the above technical scheme, after the anti-corrosion rubber layer on the steel roller embryo is washed off with dilute hydrochloric acid, the hydrochloric acid on the surface of the steel roller embryo is washed away with industrial alcohol, and then the industrial alcohol on the surface of the steel roller embryo is washed away with water to remove the hydrochloric acid residue as much as possible. The time for washing with clean water is controlled at 8-12s to avoid rust on the surface of the steel roller embryo as much as possible. Then, it is washed with industrial alcohol so that when the surface of the steel roller embryo is blown dry, the liquid on the surface of the steel roller embryo can evaporate and dry as soon as possible.

[0018] Optionally, in step 2, the anti-corrosion glue layer is sprayed by a glue spraying device, wherein the glue spraying device includes a nozzle, a compressed air pipe and a self-flowing glue supply tank, and the compressed air pipe and the self-flowing glue supply tank are respectively connected to the nozzle.

[0019] By adopting the above technical scheme, when the glue spraying device is working, the glue in the gravity-flowing glue supply tank flows into the inside of the nozzle by itself under the action of gravity, and at the same time, the compressed air pipe inputs compressed air into the inside of the nozzle, and the compressed air sprays the glue in the form of mist, so that the glue spraying device can spray the anti-corrosion glue layer on the surface of the steel roller blank.

[0020] Optionally, the glue spraying device further includes an auxiliary glue supply mechanism, and the auxiliary glue supply mechanism includes a glue supply pump, and the glue supply pump supplies glue to the spray head through an auxiliary glue supply pipe.

[0021] By adopting the above technical scheme, the glue material of the glue spraying device can be supplied to the glue spraying device through the auxiliary glue supply mechanism in addition to the gravity-flow glue supply tank. The glue supply pump of the auxiliary glue supply mechanism supplies glue to the nozzle through the auxiliary glue supply pipe; the glue spraying device can be supplied with glue through the gravity-flow glue supply tank and the auxiliary glue supply mechanism, which is conducive to making the glue supply of the glue supply device more reliable.

[0022] Optionally, the end of the nozzle used for spraying glue is set as the glue spraying end, the auxiliary glue supply hose and the compressed air hose are both located at the end of the nozzle away from the glue spraying end, the center line of the glue outlet end of the auxiliary glue supply hose intersects with the center line of the compressed air outlet end, and the intersection is located at the center of the glue spraying end of the nozzle.

[0023] By adopting the above technical scheme, the glue supply pump of the auxiliary glue supply mechanism pumps glue into the inner side of the nozzle through the auxiliary glue supply hose, and the glue is sprayed in the nozzle at a certain pressure and flow rate. At the same time, the compressed air from the compressed air pipe is also sent into the inner side of the nozzle at a certain pressure and flow rate. Since the center line of the glue outlet end of the auxiliary glue supply hose intersects with the center line of the air outlet end of the compressed air, and the intersection is located at the center of the glue spraying end of the nozzle, the glue and the compressed air meet at the center of the glue spraying end of the nozzle, which is conducive to the compressed air to atomize and spray the glue as soon as possible, and to make the nozzle spray glue more evenly.

[0024] Optionally, the auxiliary glue supply mechanism also includes a return pipe, one end of the return pipe is connected to the auxiliary glue supply pipe, one end of the return pipe is connected to the auxiliary glue supply pipe, and the other end of the return pipe is connected to the feed end of the glue supply pump. The auxiliary glue supply pipe is provided with a first gate valve, and the return pipe is provided with a second gate valve. The axial direction of the first gate valve is parallel to the axial direction of the second gate valve. The first gate valve is provided with a first hand wheel, and the second gate valve is provided with a second hand wheel. The first hand wheel and the second hand wheel are arranged opposite to each other, and a connecting rod assembly is connected between the first hand wheel and the second hand wheel. When the first gate valve is in a fully open state, the second gate valve is in a closed state.

[0025] Compared with the gravity-fed glue supply tank that supplies glue by gravity flow, the auxiliary glue supply mechanism supplies glue by pressurizing the glue supply pump, so that the glue supply rate of the auxiliary glue supply mechanism is much greater than the glue supply rate of the gravity-fed glue supply tank. However, under the premise of the same compressed air source, the atomization capacity of compressed air is limited. When the glue supply rate of the auxiliary glue supply mechanism is greater than the atomization capacity of compressed air, it will have an adverse effect on the glue spraying effect of the glue spraying device. By adopting the above technical solution, the return pipe connected to the auxiliary glue supply hose can divert and discharge the glue of the auxiliary glue supply hose to reduce excessive glue entering the nozzle. The rubber distribution ratio in the return pipe and the auxiliary rubber supply pipe is adjusted and controlled by the first gate valve and the second gate valve. The first hand wheel of the first gate valve and the second hand wheel of the second gate valve are arranged relative to each other and are connected by a connecting rod assembly, so that the first gate valve and the second gate valve can be adjusted synchronously in reverse. When the connecting rod assembly drives the first hand wheel and the second hand wheel to rotate at the same time, the opening and closing actions of the first gate valve and the second gate valve are opposite, so that the total opening degree superimposed between the first gate valve and the second gate valve is generally constant, so that the total pumping rate of the rubber supply pump is relatively constant, which is beneficial to protecting the rubber supply pump.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. This application first uses a 100# grinding head for grinding. When the surface roughness of the steel roller embryo is 0.2-0.3ra, it is then ground with a 6000# grinding head, which can make the surface of the steel roller embryo reach the roughness requirement of 0.1-0.05ra, so that the surface of the steel roller embryo can reach the smoothness required for printing. By directly using the surface of the steel roller embryo as the engraving working layer, it is helpful to save the processing cost and wastewater treatment work corresponding to setting the nickel layer and copper layer on the surface of the steel roller embryo, which is beneficial to environmental protection.

[0028] 2. By using alkaline cutting fluid containing sodium oxide for wet grinding, the steel roller body can be cooled and rust-proofed during the grinding process.

[0029] 3. The alternating conversion between forward and reverse rotation is beneficial to maintain the uniformity of corrosion on the steel roller blank, reduce the corrosion marks formed by long-term corrosion in the same direction, and reduce the impact of corrosion marks on subsequent printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a flow chart of the method for producing the gravure printing plate roller in Example 1.

[0031] Figure 2 It is a schematic structural diagram of the glue spraying device of Example 1.

[0032] Figure 3 It is a schematic structural diagram of the glue spraying device of Example 2.

[0033] Figure 4 It is a schematic diagram of the structure of the glue spraying device of Example 3.

[0034] Figure 5 This is a schematic diagram of Example 3 for illustrating the connection relationship between the nozzle and the compressed air pipe and the auxiliary rubber supply hose.

[0035] Figure 6 yes Figure 4 A magnified partial view of point A in the middle.

[0036] Description of reference numerals:

[0037] 1. Glue spraying device; 11. Nozzle; 12. Compressed air pipe; 13. Gravity glue supply tank; 14. Auxiliary glue supply mechanism; 141. Glue supply pump; 142. Glue supply tank; 143. Feed pipe; 144. Auxiliary glue supply hose; 1441. Flow regulating valve; 145. Return pipe; 146. Three-way joint; 147. First gate valve; 1471. First hand wheel; 148. Second gate valve; 1481. Second hand wheel; 149. Connecting rod assembly; 1491. First connecting rod; 1492. Second connecting rod; 1493. Flange; 1494. Bolt and nut assembly; 1495. Rubber buffer pad. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-6 This application is described in further detail.

[0039] Example 1

[0040] The present application embodiment discloses a method for manufacturing a gravure printing plate roller. Figure 1 and Figure 2 The method for making a gravure printing plate roller comprises the following steps:

[0041] Step 1, pretreatment of the steel roller embryo, grinding the surface of the steel roller embryo by wet grinding, first grinding with a 100# grinding head, when the surface roughness of the steel roller embryo is 0.2-0.3ra, then grinding with a 6000# grinding head until the surface roughness of the steel roller embryo is 0.1-0.05ra; the cutting fluid used in the grinding process includes sodium hydroxide and water, the pH value of the cutting fluid is 9-12, and the cutting fluid has the effect of cooling and rust prevention on the surface of the steel roller embryo;

[0042] Step 2, the surface of the steel roller blank is sprayed with an anti-corrosion glue layer by a glue spraying device 1; the glue spraying device 1 comprises a nozzle 11, a compressed air pipe 12 and a self-flowing glue supply tank 13, and the compressed air pipe 12 and the self-flowing glue supply tank 13 are respectively connected to the nozzle 11; when the spraying device sprays the glue, the glue in the self-flowing glue supply tank 13 flows into the inner side of the nozzle 11 by itself under the action of gravity, and at the same time, the compressed air pipe 12 inputs compressed air to the inner side of the nozzle 11, and the compressed air sprays the glue in a mist form, so that the glue spraying device 1 sprays the surface of the steel roller blank to form an anti-corrosion glue layer;

[0043] Step 3, using laser engraving to remove the anti-corrosion glue on the surface of the steel roller blank corresponding to the printing plate image and text;

[0044] Step 4, the steel roller embryo is immersing and corroding with nitric acid of 45-55 mass concentration, and the nitric acid concentration in this embodiment is specifically selected as nitric acid of mass concentration of 50; the steel roller embryo is corroded by semi-immersion in nitric acid, and the steel roller embryo is corroded in a forward and reverse cycle repeatedly during the immersion corrosion process to reduce the influence of corrosion marks formed by corrosion in the same direction on the printing quality;

[0045] When the steel roller embryo is immersed in corrosion, the corrosion time is determined according to the grid depth. When determining the corrosion time, the time for the steel roller embryo surface to corrode one unit depth is set as the unit time. The required corrosion time is predicted according to the grid depth required to be corroded on the steel roller embryo surface. When the actual corrosion time of the steel roller embryo is about to enter the last unit time, the grid depth is measured, and then the time required to continue corrosion is calculated based on the difference between the measured actual grid depth and the designed grid depth, and then the steel roller embryo is corroded to completion; for example, the unit time of the corrosion depth requirement of 1S (wire) is 1min. If the corrosion depth is required to be 5S, the corrosion takes 5min. Then, when the corrosion reaches 4min, the grid depth is measured and tested once to determine the grid depth, and then the corrosion is continued until it meets the requirements;

[0046] Step 5, cleaning the steel roller embryo, first use 10%-15% dilute hydrochloric acid to clean it, so that the anti-corrosion rubber layer falls off, then use industrial alcohol to clean it for 8-12 minutes, then use water to clean it for 8-12 seconds, then use industrial alcohol to clean it for 50-70 seconds, and then use an air gun to blow dry the steel roller embryo; the cleaning method of each cleaning process in this step is flushing;

[0047] Step 6, chrome plating the steel roller blank.

[0048] The implementation principle of the manufacturing method of a gravure printing plate roller in the embodiment of the present application is as follows: the present application first uses a 100# grinding head for grinding, and when the surface roughness of the steel roller embryo is 0.2-0.3ra, it is then ground with a 6000# grinding head, so that the surface of the steel roller embryo can reach the roughness requirement of 0.1-0.05ra, so that the surface finish of the steel roller embryo meets the printing requirement, and the surface of the steel roller embryo can be evenly attached with anti-corrosion glue, and the bonding force between the anti-corrosion glue and the surface of the steel roller embryo is guaranteed. By directly using the surface of the steel roller embryo as the engraving working layer, it is helpful to save the processing cost and wastewater treatment work corresponding to setting the nickel layer and the copper layer on the surface of the steel roller embryo.

[0049] Example 2

[0050] Reference Figure 3 The difference between this embodiment and embodiment 1 is that the glue spraying device 1 further includes an auxiliary glue supply mechanism 14, and the auxiliary glue supply mechanism 14 includes a glue supply pump 141 and a glue supply tank 142. The glue supply pump 141 in this embodiment is specifically a diaphragm pump. The feed end of the glue supply pump 141 is connected to the glue supply tank 142 through a feed pipe 143, and the discharge end of the glue supply pump 141 supplies glue to the nozzle 11 through an auxiliary glue supply pipe 144. The end of the auxiliary glue supply pipe 144 close to the nozzle 11 is provided with a flow regulating valve 1441. The end of the nozzle 11 used for glue spraying is set as a glue spraying end, and the air outlet end of the compressed air pipe 12 and the glue outlet end of the auxiliary glue supply pipe 144 are both located at the end of the nozzle 11 away from the glue spraying end.

[0051] In addition to being supplied by the self-flowing glue supply tank 13, the glue material of the glue spraying device 1 in the embodiment can also be supplied by the auxiliary glue supply mechanism 14. The glue spraying device 1 can be supplied by the self-flowing glue supply tank 13 and the auxiliary glue supply mechanism 14, which is conducive to making the glue supply of the glue supply device more reliable.

[0052] Example 3

[0053] Reference Figure 4 and Figure 5 The difference between this embodiment and embodiment 2 is that the glue outlet end of the auxiliary glue supply hose 144 is located above the air outlet end of the compressed air pipe 12, and the glue outlet end of the auxiliary glue supply hose 144 and the air outlet end of the compressed air pipe 12 are both located at the end of the nozzle 11 away from the glue spraying end, and the center line of the glue outlet end of the auxiliary glue supply hose 144 intersects with the center line of the air outlet end of the compressed air, and the intersection is located at the center of the glue spraying end of the nozzle 11.

[0054] The glue supply pump 141 pumps the glue into the nozzle 11, and the glue is sprayed in the nozzle 11 at a certain pressure and flow rate. At the same time, the compressed air from the compressed air pipe 12 is also sent into the inside of the nozzle 11 at a certain pressure and flow rate. Since the center line of the glue outlet end of the auxiliary glue supply pipe 144 intersects with the center line of the compressed air outlet end, and the intersection is located at the center of the glue spraying end of the nozzle 11, the glue and the compressed air meet at the center of the glue spraying end of the nozzle 11, which is conducive to the compressed air atomizing and spraying the glue as soon as possible, and is conducive to making the nozzle 11 spray glue more evenly. In addition, the glue outlet end of the auxiliary glue supply pipe 144 is arranged above the compressed air outlet end, so that the compressed air can blow as much glue sprayed from the auxiliary glue supply pipe 144 as possible out of the nozzle 11.

[0055] Reference Figure 4 The auxiliary glue supply hose 144 is connected to a return pipe 145 through a three-way joint 146. The diameter of the return pipe 145 is the same as that of the auxiliary glue supply hose 144. One end of the return pipe 145 is connected to the auxiliary glue supply hose 144, and the other end of the return pipe 145 is connected to the glue supply tank 142, that is, the return pipe 145 is connected to the feed end of the glue supply pump 141.

[0056] Reference Figure 4 and Figure 6The auxiliary glue supply pipe 144 is provided with a first gate valve 147, and the return pipe 145 is provided with a second gate valve 148. The first gate valve 147 and the second gate valve 148 are far away from the glue supply pump 141 relative to the three-way joint 146; the axial direction of the first gate valve 147 is parallel to the axial direction of the second gate valve 148, the first gate valve 147 is provided with a first hand wheel 1471, and the second gate valve 148 is provided with a second hand wheel 1481. The first hand wheel 1471 and the second hand wheel 1481 are arranged opposite to each other, and a connecting rod assembly 149 is connected between the first hand wheel 1471 and the second hand wheel 1481. The connecting rod assembly 149 enables the first hand wheel 1471 and the second hand wheel 1481 to be synchronously rotated and adjusted. When the first gate valve 147 is in a fully open state, the second gate valve 148 is in a closed state; correspondingly, when the first gate valve 147 is in a closed state, the second gate valve 148 is in a fully open state.

[0057] Reference Figure 6 The connecting rod assembly 149 includes a first connecting rod 1491 and a second connecting rod 1492 which are coaxially arranged. One end of the first connecting rod 1491 away from the second connecting rod 1492 is fixedly connected to the first hand wheel 1471, and one end of the second connecting rod 1492 away from the first connecting rod 1491 is fixedly connected to the second hand wheel 1481. Flanges 1493 are respectively provided at the opposite ends of the first connecting rod 1491 and the second connecting rod 1492. The two flanges 1493 are connected by a bolt and nut assembly 1494. A rubber buffer pad 1495 is provided between the two flanges 1493.

[0058] The implementation principle of this embodiment is: the return pipe 145 connected to the auxiliary glue supply pipe 144 can divert and discharge the glue in the auxiliary glue supply pipe 144 to reduce the excessive glue entering the nozzle 11, thereby reducing the situation where the glue supply amount is greater than the compressed air atomization processing capacity and the glue spraying effect is affected; the glue distribution ratio in the return pipe 145 and the auxiliary glue supply pipe 144 is adjusted and controlled by the first gate valve 147 and the second gate valve 148, and the first gate valve 147 and the second gate valve 148 can be synchronously reversely adjusted through the connecting rod assembly 149, so that the total opening superimposed between the first gate valve 147 and the second gate valve 148 is generally constant, so that the total glue pumping rate of the glue supply pump 141 is relatively constant, which is beneficial to protecting the glue supply pump 141.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for manufacturing a gravure printing plate roller, characterized in that: The steps include: Step 1, pre-treatment of the steel roller blank, grinding the surface of the steel roller blank by wet grinding, first grinding with a 100# grinding head, when the surface roughness of the steel roller blank is less than 0.3ra, then grinding with a 6000# grinding head until the surface roughness of the steel roller blank is less than 0.1ra; Step 2, coating the surface of the steel roller blank with glue; The anti-corrosion glue layer is sprayed by a glue spraying device (1), wherein the glue spraying device (1) comprises a nozzle (11), a compressed air pipe (12) and a self-flowing glue supply tank (13), wherein the compressed air pipe (12) and the self-flowing glue supply tank (13) are respectively connected to the nozzle (11); the glue spraying device (1) also comprises an auxiliary glue supply mechanism (14), wherein the auxiliary glue supply mechanism (14) comprises a glue supply pump (141), wherein the glue supply pump (141) supplies glue to the nozzle (11) via an auxiliary glue supply pipe (144); and the auxiliary glue supply mechanism (14) further comprises a return pipe (145), one end of the return pipe (145) is connected to the auxiliary glue supply pipe (144), the other end of the return pipe (145) is connected to the feed end of the glue supply pump (141), the auxiliary glue supply pipe (144) is provided with a first gate valve (147), the return pipe (145) is provided with a second gate valve (148), the axial direction of the first gate valve (147) and the axial direction of the second gate valve (148) are parallel to each other, and the first gate valve (147) is provided with a first hand wheel (1471), The second gate valve (148) is provided with a second hand wheel (1481); the first hand wheel (1471) and the second hand wheel (1481) are arranged opposite to each other; a connecting rod assembly (149) is connected between the first hand wheel (1471) and the second hand wheel (1481); when the first gate valve (147) is in a fully open state, the second gate valve (148) is in a closed state; the connecting rod assembly (149) comprises a first connecting rod (1491) and a second connecting rod (1492) which are coaxially arranged; the first connecting rod (1491) and the second connecting rod (1492) are coaxially arranged; 1491) one end away from the second connecting rod (1492) is fixedly connected to the first hand wheel (1471), one end of the second connecting rod (1492) away from the first connecting rod (1491) is fixedly connected to the second hand wheel (1481), the first connecting rod (1491) and the second connecting rod (1492) are respectively provided with flanges (1493) at the opposite ends, the two flanges (1493) are connected by a bolt and nut assembly (1494), and a rubber buffer pad (1495) is provided between the two flanges (1493); Step 3, laser engraving; Step 4, soaking and corroding the steel roller blank; Step 5, cleaning the steel roller blank; Step 6, chrome plating the steel roller blank.

2. The method for manufacturing a gravure printing plate roller according to claim 1, characterized in that: The cutting fluid used in the grinding process in step 1 includes sodium hydroxide and water, and the pH of the cutting fluid is 9-12.

3. The method for manufacturing a gravure printing plate roller according to claim 1, characterized in that: In step 4, the steel roller blank is corroded by semi-immersion in nitric acid, and the steel roller blank is rotated during the immersion corrosion process.

4. The method for manufacturing a gravure printing plate roller according to claim 1, characterized in that: When the steel roller blank is immersed and corroded in step 4, the time for corroding the surface of the steel roller blank by one unit depth is set as the unit time, and the corrosion time is predicted according to the grid depth required to be corroded on the surface of the steel roller blank. When the actual corrosion time of the steel roller blank is about to enter the last unit time, the grid depth is measured, and then the time required to continue corrosion is calculated based on the difference between the measured actual grid depth and the designed grid depth, and then the steel roller blank is corroded until completion.

5. The method for manufacturing a gravure printing plate roller according to claim 1, characterized in that: Step 4: During the corrosion process of the steel roller blank, the process is repeated in a forward and reverse cycle.

6. The method for manufacturing a gravure printing plate roller according to claim 1, characterized in that: During the cleaning process of step 5, first use dilute hydrochloric acid to clean it to make the anti-corrosion rubber layer fall off, then use industrial alcohol to clean it for 8-12 minutes, then use water to clean it for 8-12 seconds, then use industrial alcohol to clean it for 50-70 seconds, and then blow dry the steel roller blank.

7. The method for manufacturing a gravure printing plate roller according to claim 1, characterized in that: The end of the nozzle (11) used for spraying glue is set as the glue spraying end, the auxiliary glue supply pipe (144) and the compressed air pipe (12) are both located at the end of the nozzle (11) away from the glue spraying end, the center line of the glue outlet end of the auxiliary glue supply pipe (144) intersects with the center line of the compressed air outlet end, and the intersection is located at the center of the glue spraying end of the nozzle (11).

Images