Printing pretreatment device for flexible board printing base film
By combining vertical rinsing with water-absorbing sponge absorption, the problems of plastic film shaking and increased power consumption during the washing process are solved, achieving stable delivery and rapid drying of the base film and improving printing quality.
Patent Information
- Application Number
- CN202520188763.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-07
AI Technical Summary
In existing technologies, water washing can easily lead to shaking of the plastic film and increased power consumption, while solvent cleaning can result in increased resistance.
The system employs a vertical rinsing method combined with absorbent sponges to absorb water from both sides. The rinsing mechanism sprays water horizontally from both sides to counteract the water flow. The absorbent sponges, driven by the squeegee conveyor belt, adhere to the base film and rotate in the same direction as the base film's movement, absorbing residual moisture. The water is then squeezed out by the squeezing rollers. A partition separates the rinsing and squeezing mechanisms to prevent water splashing and base film vibration.
It effectively prevents the formation of base film wrinkles, reduces the power consumption of the pre-printing treatment device, and achieves rapid drying and stable transport, thereby improving printing quality.
Smart Images
Figure CN223720434U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the flexible board printing base film production and processing technical field, concretely relates to a flexible board printing base film printing pretreatment device. BACKGROUND
[0002] Plastic film flexible board printing comes out various cartoon patterns etc., and then adheres to the outside of industrial products as the outer packaging. Because the surface of plastic film can be contaminated by mold release agent, oil stains and the like, if these contaminants are not cleaned thoroughly, it will result in the decline of printing quality.
[0003] In the printing pretreatment process, there are generally two ways of water washing and solvent cleaning, which can be selected according to the specific conditions of the surface of the plastic film.
[0004] 1. In the water washing process, the upper and lower surfaces of the plastic film are washed with water flow, which is easy to cause the plastic film to vibrate due to uneven impact force, and may cause the plastic film to wrinkle.
[0005] 2. The plastic film is sent into the water tank and immersed in water, and the transmission roller is used for one-way transmission, which is subjected to the resistance of the water body, obviously increasing the power consumption of the pretreatment. UTILITY MODEL CONTENTS
[0006] The utility model aims to provide a flexible board printing base film printing pretreatment device, which cancels out the impact force when washing the base film in the vertical state from both sides, and uses the water-absorbing sponge to absorb the residual moisture on the base film from both sides after washing, without generating resistance, so as to reduce the power consumption.
[0007] The technical scheme adopted by the utility model is as follows:
[0008] A flexible board printing base film printing pretreatment device, comprising a film washing tank, wherein a washing channel is formed at the opening of the film washing tank, a washing mechanism, a water scraping conveyor belt and a water squeezing mechanism are horizontally arranged inside the washing channel, a zigzag plate in the shape of "V" is fixed outside the water scraping conveyor belt in sequence, an elastic member is installed inside the zigzag plate, a water-absorbing sponge is fixedly connected with the opening of the zigzag plate, the water-absorbing sponge is attached to the base film inside the washing channel under the driving of the water scraping conveyor belt, and a tensioning roller is arranged outside the film washing tank and faces the washing channel.
[0009] As a preferred scheme, the water squeezing mechanism is fixed to a flange plate inside the washing channel, and a servo motor is fixedly connected with the flange plate, the output end of the servo motor extends into the inside of the flange plate, and an extrusion rubber roller is fixed in the axial direction at the output end, and the extrusion rubber roller extrudes the moisture in the water-absorbing sponge through the extrusion force when rotating.
[0010] As a preferred scheme, two partitions are fixed inside the film washing pool and located at both sides of the washing channel, and the two partitions are both arranged at a position between the washing mechanism and the water squeezing mechanism, and one end of each of the two partitions close to each other has an arc and is bonded with a rubber sleeve.
[0011] As a preferred scheme, the washing mechanism is provided with a spray head inside the washing channel and a water supply pipe communicated with the spray head, and the water supply pipe guides external water flow to enter the film washing pool along the spray head.
[0012] As a preferred scheme, a hanging plate is fixed above the film washing pool, and the water inlet end of the spray head penetrates through the hanging plate and is communicated with the water supply pipe.
[0013] As a preferred scheme, the bottom of the washing channel is communicated with a collecting groove, the height of the collecting groove is less than the height of the washing channel, and the collecting groove is communicated with a backwater pipe.
[0014] The technical effects achieved by the present application are as follows.
[0015] When the base film is unwound, the base film is supported from two points, can pass through the washing channel 2 in an upright state, water can be sprayed on the base film from both sides by the washing mechanism, two water flows offset each other, pollution is removed and wrinkles are prevented, water on the base film is absorbed by the water absorbing sponge from both sides, the rotating direction of the water absorbing sponge is the same as the advancing direction of the base film, no resistance is brought to the base film, and the power consumption of the pre-treatment device can be reduced.
[0016] In order to create a good drying environment, the two partitions are arranged at a position between the washing mechanism and the water squeezing mechanism, the two partitions can be separated to prevent the splashing water flow from flying to the water absorbing sponge during the washing process, and the rubber sleeves with the arc are used to limit the base film from both sides to prevent the base film from shaking and deviating. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a front view of a flexographic printing base film pre-treatment device of the present application;
[0018] Figure 2 is a structure schematic view of a water scraping conveyor belt of the present application;
[0019] Figure 3 is a structure schematic view of a water squeezing mechanism of the present application;
[0020] Figure 4 Figure 1 is a structural schematic diagram of the washing mechanism of the present application.
[0021] In the drawings, the components represented by each reference numeral are listed as follows:
[0022] 1, film washing pool; 2, washing channel; 3, squeegee conveyor belt; 301, rotary motor; 4, folded plate; 5, elastic member; 6, water-absorbing sponge; 7, tension roller; 8, flange plate; 9, extrusion rubber roller; 10, servo motor; 11, partition plate; 12, rubber sleeve; 13, spray head; 14, water supply pipe; 15, suspension plate; 16, collection groove; 17, backwater pipe. DETAILED DESCRIPTION
[0023] In order to make the purpose and advantages of the present application more clear and explicit, the present application will be specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present application, and does not strictly limit the scope of protection specifically requested by the present application.
[0024] Plastic film flexographic printing of various cartoon patterns, etc., and then adhered to the outside of industrial products as packaging. Before flexographic printing, the base film is wound out of a roll of plastic film, cut and sheared to make a specified width of base material for standby. These base films are generally subjected to the following pretreatment:
[0025] I. Cleaning
[0026] Because the surface of the plastic film may be contaminated by mold release agent, oil stains, etc., these contaminants will cause the printing quality to decline if not cleaned thoroughly. The cleaning methods generally include water washing and solvent cleaning. Water washing generally involves placing the base film in a water tank for washing, using water flow to remove these contaminants. However, water flow can easily impact the base film, causing it to vibrate, and in severe cases, it may cause the base film to wrinkle. Therefore, the water washing method of the base film is improved in this embodiment.
[0027] II. Surface treatment
[0028] The surface of the plastic film is prone to carry a charge, which can cause poor adhesion of the oil film and affect the printing quality. Therefore, the plastic film needs to be surface treated before flexographic printing to remove the attached charge. Commonly used methods include manual discharge, corona discharge, and plasma treatment.
[0029] III. Coating
[0030] Plastic film generally needs to be coated. The coating of the plastic film can reduce the interaction with the oil film during printing, improve uniformity, adhesion, and reduce ink breakage. The type of coating is selected according to the different printing inks.
[0031] IV. Inspection
[0032] The treated plastic film needs to be inspected to ensure that the preparation work is completed. The items of inspection include: judging whether the surface is smooth, judging whether there are rough lines, judging whether there is obvious pollution, judging whether the coating is uniform, etc.
[0033] As shown in Figures 1-4 A soft plate printing base film pre-treatment device before printing, including the washing film pool 1 filled with clean water, in order to facilitate the accommodation of the base film, the embodiment is provided with a washing channel 2 at the opening of the washing film pool 1, while the base film is unwound from one side of the washing film pool 1, two tensioning rollers 7 are provided outside the washing film pool 1 and face the washing channel 2, respectively supporting the base film from two points, and then winding the base film from one side of the washing film pool 1, which can pass the base film through the washing channel 2 in an upright state, and a washing mechanism, a water scraping conveyor belt 3 and a water squeezing mechanism are provided inside the washing channel 2, which can use the washing mechanism to spray water horizontally from both sides of the base film to the middle for washing, and the two water flows cancel each other out to remove pollution and prevent wrinkles from being generated, and the outside of the water scraping conveyor belt 3 is sequentially fixed with a "V"-shaped folding plate 4, an elastic member 5 installed inside the folding plate 4, and a water-absorbing sponge 6 fixedly connected with the opening of the folding plate 4, here, due to the staggered arrangement of the two water scraping conveyor belts 3, the water-absorbing sponge 6 is attached to the base film inside the washing channel 2 under the driving of the water scraping conveyor belt 3, and the rotating direction is the same as the advancing direction of the base film, which does not bring resistance to the base film, and can reduce the power consumption of the pre-treatment device, and especially the water-absorbing sponge 6 can absorb the residual moisture on the base film;
[0034] Further, after the water-absorbing sponge 6 reaches the water squeezing mechanism, the water-absorbing sponge 6 is compressed to squeeze out the water, so as to be quickly dried, and the washing water and the squeezed-out water fall into the washing film pool 1, at the same time, the squeezing folding plate 4 is expanded and the elastic member 5 is stretched, leaving a safety space, after being separated from the water squeezing mechanism, under the elastic force of the elastic member 5, the folding plate 4 is pulled to be reduced, and the water-absorbing sponge 6 is supported to reset the deformation, so that the water-absorbing sponge 6 can still rebound to attach to the base film after being squeezed.
[0035] Among them, the water scraping conveyor belt 3 is driven by the rotating motor 301 provided thereon, and the rotating directions of the two rotating motors 301 are opposite, which realizes that the water-absorbing sponges 6 are respectively attached to the base film advancing from both sides of the base film. While the elastic member 5 of the embodiment is selected from high-elastic rubber material, which can maintain good elasticity after being stretched for many times.
[0036] Referring to the accompanying Figure 1 and Figure 3, the water-absorbing sponge 6 is in motion, friction may be generated, therefore, the water squeezing mechanism of the embodiment comprises a flange plate 8 fixed inside the rinsing channel 2 and a servo motor 10 fixedly connected with the flange plate 8, the servo motor 10 can be a YEJ three-phase asynchronous motor, the output end of the servo motor 10 extends into the inside of the flange plate 8 for rotation, and the output end is fixed with a squeezing rubber roller 9 along the axial direction, so that the squeezing rubber roller 9 squeezes out the water in the water-absorbing sponge 6 through the squeezing force generated by the rotation of the squeezing rubber roller 9, so that the water-absorbing sponge 6 can have a dry part to contact the base film, realizing continuous wiping of the base film.
[0037] Due to the limited space of the processing workshop, the land area of the film washing tank 1 cannot be very large, so the rinsing mechanism and the water squeezing mechanism are relatively close. The splashing water during rinsing may splash onto the dry part of the water-absorbing sponge 6, which needs to be separated to maintain a good dry environment for the water-absorbing sponge 6.
[0038] Referring to the accompanying drawings Figure 1 and Figure 3 , in order to create a good dry environment, two partition plates 11 are fixed inside the film washing tank 1 by bolts, respectively located on both sides of the rinsing channel 2, both partition plates 11 are arranged between the rinsing mechanism and the water squeezing mechanism, which can be separated by the two partition plates 11 to prevent the splashing water flow during rinsing from flying onto the water-absorbing sponge 6, and the end of each partition plate 11 close to each other has a curvature and is bonded with a rubber sleeve 12, which can limit the base film from both sides to prevent the base film from shaking and deviating.
[0039] Referring to the accompanying drawings Figure 1 , Figure 2 and Figure 4 , the rinsing mechanism comprises a spray head 13 arranged inside the rinsing channel 2 and a water supply pipe 14 communicated with the spray head 13, the water inlet end of the water supply pipe 14 is connected to a water source, which can be supplied by tap water or by a water pump, after the base film is fed in, the water supply pipe 14 is started to guide the external water flow to be injected into the film washing tank 1 along the spray head 13, maintaining uniform pressure from both sides to continuously rinse both sides of the base film to remove pollution.
[0040] Referring to the accompanying drawings Figure 1 and Figure 4 , a hanging plate 15 is fixed above the film washing tank 1, the water inlet end of the spray head 13 penetrates through the hanging plate 15 to be communicated with the water supply pipe 14, and the hanging plate 15 supports 7 spray heads 13 to offset the reaction force received by the spray head 13, so that the spray head 13 always rinses in the same position.
[0041] Referring to the accompanying drawings Figure 1 , Figure 2 and Figure 4The bottom of the flushing channel 2 is communicated with a collecting groove 16, the height of the collecting groove 16 is less than the height of the flushing channel 2, the flushing waste water and the extrusion waste water can flow into the collecting groove 16, the activated carbon filter waste water can be installed at the water outlet of the collecting groove 16, and the water return pipe 17 is communicated with the water outlet of the collecting groove 16, so that the filtered water can be guided to the water pump and be reused for flushing the base film.
[0042] The working principle of the utility model is as follows: during work, the base film is unwound from one side of the film washing pool 1, supported by two tensioning rollers 7 from two points, and then wound from the other side of the film washing pool 1, so that the base film can pass through the flushing channel 2 in an upright state, water can be sprayed on the base film from both sides by the flushing mechanism, the base film can be washed and wrinkles can be prevented, the water absorption sponge 6 can be attached to the base film in the flushing channel 2 under the driving of the water scraping conveyor belt 3, the rotating direction of the water absorption sponge 6 is the same as the advancing direction of the base film, so that the base film is not subjected to resistance, the power consumption of the pre-treatment device can be reduced, and the water absorption sponge 6 can absorb the residual water on the base film.
[0043] Meanwhile, after the water absorption sponge 6 reaches the water squeezing mechanism, the water absorption sponge 6 is compressed to squeeze out water, so as to be quickly dried, the squeeze-shaped plate 4 is expanded and the elastic element 5 is stretched, a safety space is left, after the water absorption sponge 6 is separated from the water squeezing mechanism, the squeeze-shaped plate 4 is pulled to be reduced under the elastic force of the elastic element 5, and the water absorption sponge 6 is supported to be reset, so that the water absorption sponge 6 can be rebounded to attach to the base film after being squeezed.
[0044] In addition, the flushing mechanism and the water squeezing mechanism are separated by the two partitions 11, so that the splashing water flow in the flushing process cannot fly to the water absorption sponge 6, and the base film is limited from both sides by the arc-shaped rubber sleeve 12, so that the base film cannot shake and deviate.
[0045] The above description is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and decorations can be made without departing from the principle of the utility model, and these improvements and decorations should also be regarded as the protection range of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.
Claims
1. A pretreatment apparatus for flexographic printing base film, comprising a film washing tank (1), characterized in that: The washing tank (1) has a rinsing channel (2) at its opening. The rinsing channel (2) is horizontally arranged with a rinsing mechanism, a squeegee conveyor belt (3) and a squeezing mechanism. The squeegee conveyor belt (3) is fixed to the outside of a V-shaped folded plate (4), an elastic element (5) installed inside the folded plate (4), and a water-absorbing sponge (6) fixedly connected to the opening of the folded plate (4). The water-absorbing sponge (6) adheres to the base film inside the rinsing channel (2) under the drive of the squeegee conveyor belt (3). The washing tank (1) is provided with a tensioning roller (7) facing the rinsing channel (2).
2. The pre-treatment apparatus for flexographic printing base film according to claim 1, characterized in that: The water squeezing mechanism includes a flange plate (8) fixed inside the rinsing channel (2) and a servo motor (10) fixedly connected to the flange plate (8). The output end of the servo motor (10) extends into the flange plate (8) and a squeezing roller (9) is fixed to the output end along the axial direction. The squeezing roller (9) squeezes out the water in the absorbent sponge (6) by the squeezing force when rotating.
3. The pre-treatment device for flexographic printing base film according to claim 1, characterized in that: The washing pool (1) has two partitions (11) fixed inside, which are located on both sides of the rinsing channel (2). Both partitions (11) are located between the rinsing mechanism and the squeezing mechanism. The ends of the two partitions (11) that are close to each other are curved and are glued with rubber sleeves (12).
4. The pre-treatment device for flexographic printing base film according to claim 1, characterized in that: The rinsing mechanism includes a nozzle (13) disposed inside the rinsing channel (2) and a water supply pipe (14) connected to the nozzle (13). The water supply pipe (14) guides external water flow along the nozzle (13) into the membrane washing pool (1).
5. The pre-treatment apparatus for flexographic printing base film according to claim 4, characterized in that: A hanging plate (15) is fixed above the washing pool (1), and the water inlet end of the nozzle (13) passes through the hanging plate (15) and is connected to the water supply pipe (14).
6. The pre-treatment apparatus for flexographic printing base film according to claim 1, characterized in that: The bottom of the flushing channel (2) is connected to a collection tank (16), the height of the collection tank (16) is less than the height of the flushing channel (2), and the collection tank (16) is connected to a return water pipe (17).