Feeding and bubble removing structure for blade coating of coating machine

Abstract

The utility model discloses a feeding and bubble removing structure for blade coating of a coating machine, which comprises a nozzle box, the top end of the nozzle box is provided with a group of coating material spraying ports which are oppositely arranged along the width direction of a coated paper web, and the end parts of the coating material spraying ports are in thread-shaped spraying; the two ends of the coating material spraying opening are each provided with a plug piece adjusting mechanism, and the plug piece adjusting mechanisms are inserted into linear spraying openings in the ends of the coating material spraying opening through plug pieces and used for adjusting the sewing line-shaped spraying width according to different coating paper web widths. The rear end of an upper plug piece of the plug piece adjusting mechanism is provided with a bubble discharging air opening used for discharging bubbles in sprayed slurry from the side end face of the coating material spraying opening. Due to the fact that the rear end face of the plug piece does not block the material spraying opening, a gap bubble discharging channel is reserved, enough gaps are reserved for discharging bubbles in the coating in the production feeding process, the quality problems that thin materials are missed to be coated due to the fact that bubbles on the two sides fall off in the production process are solved, and the production quality of coating is effectively improved.

Description

[Technical field]

[0001] The utility model relates to a coating processing technology of a coating machine, in particular to a material feeding and bubble removal structure used for coating with a coating knife of the coating machine. [Background technology]

[0002] Coating machines are mainly used for coating production on the surfaces of films, paper, etc. They coat the rolled substrate with a layer of glue, paint or ink with specific functions, and then reel it up after drying. When a special multi-functional coating head is used, various forms of surface coating can be achieved. However, there are more or less bubbles in the pipeline of the coating machine, which will affect the coating effect when used.

[0003] The existing coating machine feeding methods mainly include roller feeding and spray feeding. The traditional roller feeding structure can only meet the vehicle speed <500m / min. Beyond this range, the feeding roller rotates too fast, causing paint splashing, resulting in reduced transfer efficiency of the paint to the base paper and disturbing the uniformity of the transfer surface. In the prior art, the roller feeding method of scraper coating has begun to change to the spray feeding form. Through a specially designed nozzle, the paint is sprayed from the nozzle slit, and the paint is evenly sprayed onto the surface of the paper sheet in full, and then the coating amount is controlled by a metering scraper device; since the spray feeding is a non-contact feeding method, the paint supply amount can be changed accordingly according to the coating speed. In actual production operation, bubbles or impurities mixed into the coating will cause the coating to intermittently spray out from the front end of the spray slot, resulting in coating omissions on the coated paper surface; or in the coating production process, when using a scraper coating head, the edge adjustment plugs on both sides of the coating head spray port completely block the spray port, resulting in bubbles unable to be discharged, causing material to fall off on both sides of the spray port during feeding, resulting in coating omissions and other quality problems, which seriously affect production efficiency and make it impossible to guarantee product quality.

[0004] Therefore, it is necessary to use relevant equipment or control structures to remove bubbles and impurities in the coating as much as possible to avoid coating omissions on the coated paper surface. [Contents of the utility model]

[0005] The utility model provides a feeding and bubble removal structure for coating with a coating machine scraper, which can be adjusted adaptively according to different coating widths and effectively avoid clogging of gaps on both sides of a coating spray port, bubbles in the coating and coating leakage on the surface of coated paper.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A feeding and bubble removal structure for blade coating of a coating machine, comprising a nozzle box, wherein the nozzle box is used to buffer coating slurry supplied from a slurry system;

[0008] A group of coating spray ports which are arranged opposite to each other and have ends that spray in the shape of seams are installed at the top of the nozzle box along the width direction of the coated paper web;

[0009] The two ends of the coating spray port are respectively provided with plug adjustment mechanisms which are inserted into the linear spray port at each end of the coating spray port through plugs and are used to adjust the width of the seam-shaped spray according to different coated paper widths;

[0010] The rear end of the plug on the plug adjustment mechanism along the width direction of the coated paper web is provided with a bubble discharge port that facilitates the connection between the injection gap on the front end face of the coating spray port and the side end face of the coating spray port, and is used to discharge bubbles in the spray slurry from the side end face of the coating spray port.

[0011] Preferably, the plug adjustment mechanism comprises an adjustment seat, an adjustment screw, a linear lateral movement nut and a plug, wherein the plug is inserted into each end of the strip-shaped gap of the coating spray port along the width direction of the coated paper web and is used to block the front end face, and the rear end of the plug along the width direction of the coated paper web is contracted toward the front end face to form a bubble discharge channel connected to the injection gap of the front end face of the coating spray port and connected to the side end face of the coating spray port, and the bubble discharge channel forms a bubble discharge port at the side end face of the coating spray port for discharging bubbles in the spray slurry from the side end face:

[0012] The plug is connected to the linear transverse nut through a fixed block, and the adjusting screw drives the linear transverse nut and the plug to move left and right along the linear guide groove provided on the adjusting seat to adjust the width of the strip-shaped gap of the coating spray port through which the plug is inserted.

[0013] Preferably, the gap width of the bubble discharge channel is 1.5 mm to 2 mm, and the height is 10 mm to 12 mm.

[0014] The beneficial effects of the utility model are:

[0015] Through the plug adjustment mechanism, the adjusting screw rotates, driving the linear transverse nut and the plug to move left and right along the linear guide groove set in the adjustment seat, and adjusting the width of the strip gap of the coating spray port through which the plug is inserted along the width direction of the coated paper web. The width of the coating spray port can be adaptively adjusted according to different coating widths. There is no need to replace different coating nozzles according to different paper web widths. During use, there is no need to be restricted by different products. The gap width of the nozzle structure can be adaptively adjusted to adapt to different coating widths, thereby effectively improving production efficiency.

[0016] Moreover, since the injection slit on the front side end face of the coating spraying port is connected to the side end face of the coating spraying port, the rear end of the plug along the width direction of the coated paper web is provided with a bubble discharge port for discharging bubbles in the spray slurry from the side end faces on both sides of the coating spraying port, thus effectively avoiding blockage of the slits on both sides of the coating spraying port, avoiding bubbles in the coating and coating leakage on the surface of the coated paper. There is enough space for bubbles in the coating to be discharged during the production and feeding process, which solves the quality problems such as coating leakage and thin material leakage caused by bubbles falling on both sides during production, and effectively improves the production quality of coating.

Brief Description of the Drawings

[0017] Figure 1 It is an enlarged schematic diagram of the local structure of the utility model. [Specific implementation method]

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] A feeding and bubble removal structure for coating machine blade coating, such as Figure 1 As shown, it includes a nozzle box 1, which is used to buffer the coating slurry supplied by the slurry system; a group of coating spray ports 2 are installed at the top of the nozzle box 1 along the width direction of the coated paper web, and the ends of the coating spray ports are slit-shaped spray ports; plug adjustment mechanisms 3 are respectively provided at both ends of the coating spray ports 2, which are inserted into the linear spray ports at each end of the coating spray ports 2 through plugs 33 and are used to adjust the width of the slit-shaped spray according to different coated paper web widths; the plug adjustment mechanism 3 includes It includes an adjusting seat 30, an adjusting screw 31, a linear transverse movement nut 32 and a plug 33. The plug 33 is inserted into each end of the strip-shaped gap of the coating spray port 2 along the width direction of the coated paper web and is used to seal the front end face. The plug 33 is connected to the linear transverse movement nut 32 through a fixing block 34. When the adjusting screw 31 rotates, the linear transverse movement nut 32 and the plug 33 are driven to move horizontally left and right along the linear guide groove 300 provided on the adjusting seat 30 to adjust the width of the strip-shaped gap of the coating spray port 2 where the plug 33 is inserted.

[0020] When in use, through the plug adjustment mechanism 3, the adjusting screw 31 is rotated to drive the linear transverse nut 32 and the plug 33 to move horizontally left and right along the linear guide groove set in the adjustment seat 30, and the width of the plug 33 inserted into the coating spray port 2 is adjusted along the width direction of the coated paper web. The width of the coating spray port 2 is adaptively adjusted according to different coating widths. There is no need to replace different coating nozzles according to different paper web widths. During use, there is no need to be restricted by different products. The gap width of the nozzle structure can be adaptively adjusted to adapt to different coating widths, thereby effectively improving production efficiency.

[0021] Continue as Figure 1 As shown, the rear end of the plug 33 on the plug adjustment mechanism 3 along the width direction of the coated paper web is provided with a bubble discharge port 4 for facilitating the communication between the injection slit of the front end face of the coating spray port 2 and the side end face of the coating spray port 2, and for discharging bubbles in the spray slurry from the side end face of the coating spray port 2; wherein the rear end of the plug 33 along the width direction of the coated paper web is contracted toward the front end face to form a bubble discharge channel connected with the injection slit of the front end face of the coating spray port 2 and the side end face of the coating spray port 2, and the gap width of the bubble discharge channel is 1.5m m~2mm, height is 10mm~12mm; the bubble discharge channel forms a bubble discharge port at the side end face of the coating spray port 2 for discharging bubbles in the spray slurry from the side end face; in this way, bubbles are discharged from the bubble discharge ports at the side end faces on both sides of the coating spray port 2 through the reserved gap bubble discharge channel, effectively avoiding clogging of the gaps on both sides of the coating spray port 2, avoiding bubbles in the coating and coating leakage on the surface of the coated paper, solving quality problems such as coating leakage and thin material leakage caused by bubble drop on both sides during production, and effectively improving the production quality of coating.

[0022] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. All equivalent changes made based on the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A feeding and bubble removal structure for coating with a coating machine blade, characterized in that: It includes a nozzle box, and the nozzle box is used to buffer the coating slurry supplied by the slurry system; A group of coating spray ports which are arranged opposite to each other and have ends that spray in the shape of seams are installed at the top of the nozzle box along the width direction of the coated paper web; The two ends of the coating spray port are respectively provided with plug adjustment mechanisms which are inserted into the linear spray port at each end of the coating spray port through plugs and are used to adjust the width of the seam-shaped spray according to different coated paper widths; The rear end of the plug on the plug adjustment mechanism along the width direction of the coated paper web is provided with a bubble discharge port that facilitates the connection between the injection gap on the front end face of the coating spray port and the side end face of the coating spray port, and is used to discharge bubbles in the spray slurry from the side end face of the coating spray port.

2. The feeding and bubble removal structure for coating with a coating machine blade according to claim 1, characterized in that: The plug adjustment mechanism comprises an adjustment seat, an adjustment screw, a linear transverse nut and a plug. The plug is inserted into each end of the strip-shaped gap of the coating spray port along the width direction of the coated paper web and is used to block the front end face. The rear end of the plug along the width direction of the coated paper web shrinks toward the front end face to form a bubble discharge channel connected with the injection gap of the front end face of the coating spray port and connected with the side end face of the coating spray port. The bubble discharge channel forms a bubble discharge port at the side end face of the coating spray port for discharging bubbles in the spray slurry from the side end face. The plug is connected to the linear transverse nut through a fixed block, and the adjusting screw drives the linear transverse nut and the plug to move left and right along the linear guide groove provided on the adjusting seat to adjust the width of the strip-shaped gap of the coating spray port through which the plug is inserted.

3. The feeding and bubble removal structure for coating with a coating machine blade according to claim 2, characterized in that: The gap width of the bubble discharge channel is 1.5 mm to 2 mm, and the height is 10 mm to 12 mm.

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