TWI552807B - A multi - roll coating system - Google Patents

Description

Multi-roll coating system

This invention relates to a multi-roll coating system.

The coating equipment currently used on the market has a hot melt adhesive coating device for treating a one-component hot melt adhesive and a double (multiple) component metering and mixing device for treating a liquid adhesive at normal temperature. However, these two common coating equipments are unable to handle two-component hot melt adhesives that are solid at room temperature.

In addition, the equipment for quantitatively coating the uniformly mixed glue onto the coil is currently mainly on the market by roll coating, spray coating, blade coating, slit extrusion coating, etc., but neither of the two-component reactive hot melt adhesive can be realized. The coating amount is controlled between 1.0 and 30.0 g/m2, the precision is controlled at ±0.2 g/m2, and the speed is adapted to the range of 10 to 300 m/min.

In view of the above technical problems, the present invention is directed to a multi-roll coating system for coating a two-component reactive hot melt adhesive to meet the coating requirements for two-component reactive hot melt adhesives in production.

In order to solve the above technical problems, the specific technical solution of the present invention is as follows: a multi-roll coating system, comprising: a bottom frame, a bottom sliding rail fixed to the bottom frame, and a metering roller machine mounted on the bottom sliding rail a measuring roller having two ends fixed to the measuring roller frame, a transfer roller frame mounted on the bottom sliding rail and located at a rear side of the measuring roller frame, and two a transfer roller fixed to the transfer roller frame, a curved coating die disposed on the metering roller frame, and a coating roller 21 disposed on a rear side of the transfer roller, the arc coating die being above the metering roller Slide left and right along the axial direction of the metering roller. When the metering roller, the transfer roller, and the coating roller 21 are pressed together by the cylinder, by controlling the left and right sliding speed of the arc coating die and the rotation speed of the metering roller, a uniform layer can be applied on the surface of the metering roller. a layer of glue; when the surface linear velocity ratio between the transfer roller and the metering roller is controlled to be greater than 1, the transfer roller will peel the glue on the surface of the metering roller onto the transfer roller, and the transfer roller The thickness of the glue layer will be thinner than the thickness of the glue layer on the surface of the metering roll. Further, when the surface linear velocity ratio between the coating roller 21 and the transfer roller is controlled to be greater than 1, the coating roller 21 will peel the glue on the surface of the transfer roller onto the surface of the coating roller 21, and the coating The thickness of the glue layer on the roll of the roll 21 will be thinner than the thickness of the glue layer on the surface of the transfer roll, so that a very thin glue layer is obtained on the surface of the application roll 21. When the substrate 22 to be glued is passed between the coating roller 21 and the back pressure roller, the substrate 22 uniformly carries a certain amount of glue from the coating roller 21 under the pressure of the back pressure roller to complete the coating. . When the width of the substrate 22 and the running speed are constant, the thickness of the surface layer of the substrate 22 can be controlled by controlling the speed of the glue supply, and the width of the curved coating die can be controlled to control the width of the coating; When the width or speed of the material 22 changes, the system automatically changes the glue supply speed to ensure that the amount of glue applied per unit area is consistent with the set amount of glue applied.

Further, the metering roller frame is provided with a first group of cylinders for controlling the metering roller to be pressed or separated from the transfer roller, and the bottom frame is provided with controlling the metering roller frame and the transfer roller frame to slide along the bottom Second group of orbital motion cylinder.

Further, the metering roller is driven by the servo motor after being decelerated and driven by the timing belt; the transfer roller is driven by the servo motor to be driven by the gear; the arc coating die is driven by the chain after being decelerated by the servo motor.

Further, the bottom frame is provided with a foot cup and a roller.

Further, a scraper holder is disposed under the metering roller, and the scraper holder includes a set of cylinders and a silicone blade, wherein the set of cylinders can control the silicone blade to contact or separate from the metering roller, and the measuring roller is provided with a waste rubber disc. A waste plastic disk is fixed to the metering roller frame. When cleaning is required after the shutdown, the silicone blade on the doctor blade can extend the glue on the metering roller, and the scraped glue flows into the waste rubber tray.

Further, the transfer roll frame is provided with a waste plastic disk located below the transfer roller.

Further, the utility model further includes a base disposed on a rear side of the bottom frame, the coating roller 21 is fixed on the base and driven by a driving device disposed on the base, and the base is provided with a waste plastic disk located below the coating roller 21. .

Further, a connecting device for connecting the bottom frame and the base is further included, the connecting device includes a connecting screw mounted on the bottom frame and a connecting screw hole mounted on the base.

When the multi-roll coating system is in use, the base needs to be fixed with the equipment of the subsequent process. First raise the foot cup under the bottom frame, then the roller of the bottom frame touches the ground, pushing the coating system to the working position, that is, just connecting the connecting screw mounted on the bottom frame and the connection on the downstream process equipment When the screw holes are aligned, the connecting screw is rotated to make the multi-roll coating system and the subsequent process The device forms a firm connection. The foot cup is lowered to stabilize the coating system unit as a whole.

A waste rubber disc disposed under the metering roller, the transfer roller, and the coating roller 21 can be used to collect glue from the roller when the apparatus is shut down for cleaning.

Further, a glue supply device for supplying glue to the multi-roll coating system is further included, the glue supply device being coupled to the curved coating die.

Further, the glue supply device comprises two glue barrels, two metering gear pumps and a static mixing tube, wherein the glue barrel, the metering gear pump and the static mixing tube are connected by a heatable pipe, the static mixing tube and The arc-shaped coating die is connected, and a pressure plate, a heating plate, a melt buffer zone and a weighing sensor are arranged from top to bottom in the glue barrel, and the lower surface of the glue barrel is funnel-shaped; the weighing sensor Installed on the outside of the lower surface, the glue weight in the glue barrel and inside thereof is applied to the weighing sensor, and when the weighing sensor detects that the weight is less than the set value, a signal is sent to The control system prompts the operator to add glue through a touch screen display or a blinking signal.

Further, the glue barrel is provided with a cover barrel, and the cover barrel is provided with a cylinder for controlling the movement of the platen and a pressure gauge for displaying the cylinder pressure for connecting the outlet of the glue barrel to the pipe of the metering gear pump. A valve is provided, and a pressure sensor is disposed on the pipe connecting the metering gear pump and the static mixing pipe.

Further, the static mixing tube outer wall is sheathed with a heating sleeve.

Further, a vacuum pump and a nitrogen bottle are connected to the lid barrel on the at least one glue barrel, and a valve is arranged between the vacuum pump, the nitrogen bottle and the lid barrel.

Open the lid barrel during feeding, and open the bottom of the packaging film with a knife Then, together with the packaging film, put it into the bucket, close the lid barrel, the cylinder pushes the pressure plate down, the heating plate heats up, melts the glue in the packaging film, and the molten glue flows into the lower part from the gap between the heating plate and the barrel wall. The melt buffer zone; open the valve on the pipe between the glue barrel and the metering gear pump, the molten glue enters the metering gear pump, and is quantitatively pumped by the metering gear pump, and the metering gear pump is driven by the servo motor; After the glue is pumped out from the metering gear pump, it flows into the static mixing tube along the pipeline for uniform mixing. The outer wall of the static mixing tube is covered with a heating sleeve to ensure the viscosity of the two components at the time of mixing is low; When the glue in the cylinder is about to be used, the weight sensor under the cylinder senses that the weight of the glue barrel is reduced to the set value, and sends a signal to the control system, prompting the operator to add new glue. When the glue is replenished, the cylinder on the lid barrel first raises the pressure plate, and the operator opens the lid barrel to remove the residual packaging film on the heating plate, then opens the new glue and puts it into the cylinder, and closes the lid barrel. If the injected glue reacts with the moisture in the air, you can start the vacuum pump and its vacuum line valve, pump out most of the air and water in the barrel, then close the valve of the vacuum line, then turn on the nitrogen. Pipeline valve, fill the barrel with appropriate amount of nitrogen, keep the pressure of nitrogen in the barrel slightly higher than the external atmospheric pressure; when the static mixing tube or its front end is blocked, the pressure sensor will sense the increase of the glue pressure, if it exceeds When the value is set, a signal is sent to the control system to alert the operator to eliminate the front end blockage problem.

The invention provides a multi-roll coating device with the following beneficial effects:

(1) The multi-roll coating system can realize continuous and precise coating of double (single) component reactive hot melt adhesive on a wide web, and the coating amount can be from 0.6. Up to 30.0 g/m2, coating accuracy is less than or equal to 0.1 g/m2, coating speed can range from 5 to 300 m/min, and coating temperature can be from room temperature to 135 °C.

(2) The multi-roll coating system realizes continuous and precise coating of the double (single) component reactive hot melt adhesive on the wide web, and can replace the traditional organic solvent type glue in the plastic film composite, automobile The application of interior fitting, textile fitting, book cover and other industries has greatly reduced or even completely ruled out the problem of environmental pollution caused by organic solvents in these industries.

(3) Using the multi-roll coating system, the solvent-free double (single) component reactive hot melt adhesive can be realized without changing the main structure of the original dry composite machine, laminating machine, laminating machine, and the like. Replacing the original solvent-based glue to upgrade the production and fit, expanding the function and value of the original equipment, reducing production costs and energy consumption.

(4) The multi-roll coating system, the adjustment of the coating amount and the coating width are all performed on the touch screen, and the setting is obtained, which is simple and quick, and the existing coating equipment needs to adjust the gap and replace the coating roller. 21 or adjust the glue concentration and carry out manual weighing and other time-consuming and laborious methods, greatly improving production efficiency.

(5) The multi-roll coating system has an automatic cleaning device, which can scrape off most of the residual glue on the roller after the shutdown, thereby improving the condition that the traditional coating method requires manual use of a large amount of organic solvent during cleaning. Increased efficiency, reduced labor costs, and further reduced environmental pollution and health injuries to operators.

(6) The multi-roll coating system does not require glue tank participation during operation Therefore, it is possible to select a reaction type glue which has a faster curing speed without worrying about the problem that the glue is solidified in the glue tank or the viscosity rises too high to be coated, thereby further improving the production efficiency;

(7) The glue supply device of the multi-roll coating system has the functions of vacuuming and nitrogen-filling protection, and has good protection for the pre-heating, melting and storage of the reactive glue before coating, so that Significantly reduce the amount of maintenance work.

(8) The glue supply device of the multi-roll coating system is provided with a melt buffer, which does not need to be stopped when the glue is replenished, thereby ensuring continuous production, improving production efficiency and reducing production and raw material loss.

1‧‧‧ bottom frame

2‧‧‧Base

3‧‧‧Connecting device

11‧‧‧Measuring roller rack

12‧‧‧Transfer Roller Rack

13‧‧‧Bottom slide

14‧‧‧foot cup

21‧‧‧Application roller

22‧‧‧Substrate

31‧‧‧Connecting screw

32‧‧‧Connecting screw holes

41‧‧‧ melted plastic bucket

42‧‧‧Measuring gear pump

43‧‧‧Static mixing tube

44‧‧‧ Covered barrel

45‧‧‧ valve

46‧‧‧pressure sensor

47‧‧‧ barrel wall

111‧‧‧Arc coating die

112‧‧‧ beams

113‧‧‧Slide rails

114‧‧‧Servo motor

115‧‧‧Measuring roller

116‧‧‧Reducer

117‧‧‧Measuring roller pressing block

118‧‧‧Pneumatic rotary button

119‧‧‧barometer

121‧‧‧Transfer roller

122‧‧‧Reducer

123‧‧‧ scraper holder

124‧‧‧Group of cylinders

125‧‧‧ Silicone Blade

126‧‧‧First group of cylinders

411‧‧‧ pressure plate

412‧‧‧Flat plate

413‧‧‧Fuse buffer

414‧‧‧Weighing sensor

431‧‧‧heating sleeve

441‧‧‧ cylinder

442‧‧‧ pressure gauge

443‧‧‧Vacuum pump

444‧‧‧Nitrogen bottle

445‧‧‧ valve

446‧‧‧ Valve

1 is a perspective view of a preferred three-dimensional structure of the present invention; FIG. 2 is a schematic view of a preferred three-dimensional structure of the present invention;

The present invention will be further described in detail below in conjunction with specific embodiments.

The technical solutions provided by the present invention can be better understood by those skilled in the art, and will be explained below in conjunction with specific embodiments.

1 and 2 show a preferred three-dimensional structure of the present invention and a preferred three-dimensional structure of the present invention, including a bottom frame 1, a base 2, and a connecting device 3 for connecting the bottom frame 1 and the base 2, and the bottom frame 1 A bottom rail 13 is provided thereon, and the metering roller frame 11 and the transfer roller frame 12 are mounted on the bottom rail 13 and slidable in the direction of the bottom rail 13, the metering roller frame 11 A beam 112 connecting the two ends of the frame and a sliding rail 113 parallel to the beam 112 are disposed. The arc-shaped coating die 111 is mounted on the beam 112 and is slidably connected to the sliding rail 113. The servo motor 114 on the beam 112 is provided through the chain. The arc-shaped coating die 111 is driven to slide left and right along the slide rail 113, and both ends of the metering roller 115 are mounted on the metering roller frame 11 and directly under the slide rail 113, and the metering roller driving motor fixed on the metering roller frame 11 and The speed reducer 116 drives the metering roller 115 to rotate along its axis, and cooperates with the arc-shaped coating die 111 to move left and right, and uniformly applies the glue sent from the arc-shaped coating die to the surface of the metering roller 115, and the metering roller frame 11 side is further provided. There is a metering roller pressing block 117 for mounting and dismounting the metering roller 115. The metering roller frame 11 is also mounted with a first group of cylinders 126 for controlling the distance between the metering roller frame 11 and the transfer roller frame 12, and measuring The roller frame 11 is also fixedly mounted with a pneumatic rotary button 118 for adjusting the air pressure of each cylinder and a barometer 119 for displaying the air pressure of each cylinder. Below the metering roller 115, a scraper holder 123 is disposed. The scraper holder 123 includes a set of cylinders 124 and Silicone knife 125. A set of cylinders 124 can push the silicone blade 125 toward the metering roller 115. The bottom frame 1 is provided with a foot cup 14 and a roller (not shown). When the bottom frame 1 needs to be moved, the cup is raised. 14. When the roller is grounded, the bottom frame 1 can be pushed. When moving to the predetermined position, the foot cup 14 is lowered to keep the bottom frame 1 stable; the transfer roller frame 12 is disposed on the right side of the metering roller frame 11, and the transfer roller 121 The two ends are fixed on both sides of the transfer roller frame 12, and the transfer roller driving motor and the speed reducer 122 are mounted on one side of the transfer roller frame 12, and the transfer roller 121 is rotated along the axis thereof by the gear transmission; the connecting device 3 is installed on the A connecting screw 31 on the bottom frame 1 and a connecting screw hole 32 mounted on the base 2.

FIG. 3 is a schematic diagram of a preferred glue supply device of the present invention, comprising two glue barrels 41, a metering gear pump 42 and a static mixing tube 43, wherein the glue barrel 41, the metering gear pump 42 and the static mixing tube 43 are used. The heat-insulating pipe is connected, and the static mixing pipe 43 and the arc-shaped coating die 111 (shown in FIG. 1) are also connected by a heat-insulating pipe. The pressure-filling tank 41 is provided with a pressure plate 411 and a heat-generating plate from top to bottom. 412, the melt buffer 413, the lower surface of the glue barrel 41 is funnel-shaped, the weight sensor 414 is disposed under the glue barrel 41 and bears the weight of the glue barrel 41; the glue barrel 41 is provided with a cover barrel 44 A cylinder 441 for controlling the up-and-down movement of the pressure plate 411 and a pressure gauge 442 for displaying the pressure in the glue barrel are mounted on the cover barrel 44, and a valve 45 is provided on the pipe for connecting the outlet of the glue barrel 41 and the metering gear pump 42. a pressure sensor 46 is disposed on the pipe for connecting the metering gear pump 42 and the static mixing tube 43; the outer wall of the static mixing tube 43 is sleeved with a heating sleeve 431; and a cover barrel 44 on one of the glue barrels 41 is connected A vacuum pump 443 and a nitrogen bottle 444, a vacuum pump 443 and a lid barrel 44 are provided with a valve 445, nitrogen A valve 446 is provided between the gas cylinder 444 and the lid barrel 44.

When the material is filled, the lid barrel 44 is opened, the bottom of the packaging film of the glue is cut with a knife, and then put into the glue barrel 41 together with the packaging film, and the lid barrel 44 is closed; if the glue is put into reaction with the moisture in the air The components should be put into the glue barrel to which the vacuum pump 443 and the nitrogen bottle 444 are connected. After the lid barrel 44 is closed, the valve 446 is closed, the valve 445 is opened, and the vacuum pump 443 is activated. When the pressure gauge 442 displays the pressure value is lower than the pressure. After -0.08 bar, valve 445 is closed, vacuum pump 443 is stopped, and valve 446 is opened. Valve 446 can be closed after the pressure value indicated by pressure gauge 445 is above 0.15 bar. Cylinder 441 Pushing the pressing plate 411 down, the heating plate 412 is heated, and the glue in the packaging film is melted, and the molten glue flows from the gap between the heating plate 412 and the barrel wall 47 into the lower melting buffer 413; the molten rubber barrel 41 is opened. The valve 45 on the pipe between the gear pump 42 is metered, the molten glue enters the metering gear pump 42, and is quantitatively pumped by the metering gear pump 42, and the metering gear pump 42 is driven by the servo motor; the glue in the two glue barrels 41 is metered After the gear pump 42 is pumped out, it flows into the static mixing tube 43 along the pipeline for uniform mixing, and the outer wall of the static mixing tube 43 is covered with a heating sleeve 431 to ensure the viscosity of the two components at the time of mixing is low; When the glue in the cylinder is about to be used, the weight sensor 414 under the cylinder senses that the weight of the glue barrel 41 is reduced to a set value, and sends a signal to the control system, thereby prompting the operator to add new glue to come in and replenish the glue. When the cylinder 441 on the cover bucket 44 first raises the pressure plate 411, the operator opens the cover bucket 44, removes the residual packaging film on the heating plate 412, and then opens the package into a new glue. Static mixing When the pipe 43 or its front end is blocked, the pressure sensor 46 senses the increase of the glue pressure. If the set value is exceeded, a signal is sent to the control system, thereby prompting the operator to eliminate the front end blockage problem.

The present invention has been described in detail above, and the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the invention is covered.

1‧‧‧ bottom frame

2‧‧‧Base

3‧‧‧Connecting device

11‧‧‧Measuring roller rack

12‧‧‧Transfer Roller Rack

13‧‧‧Bottom slide

14‧‧‧foot cup

21‧‧‧Application roller

22‧‧‧Substrate

31‧‧‧Connecting screw

32‧‧‧Connecting screw holes

111‧‧‧Arc coating die

112‧‧‧ beams

113‧‧‧Slide rails

114‧‧‧Servo motor

115‧‧‧Measuring roller

116‧‧‧Reducer

117‧‧‧Measuring roller pressing block

118‧‧‧Pneumatic rotary button

119‧‧‧barometer

121‧‧‧Transfer roller

126‧‧‧First group of cylinders

Claims (14)

A multi-roll coating system, characterized in that the multi-roll coating system comprises a bottom frame, a bottom sliding rail fixed to the bottom frame, a metering roller frame mounted on the bottom sliding rail, and two ends fixed to the metering roller a metering roller on the frame, a transfer roller frame mounted on the bottom rail and located on the rear side of the metering roller frame, a transfer roller fixed at both ends to the transfer roller frame, and disposed on the metering roller frame The upper arc-shaped coating die and the coating roller disposed on the rear side of the transfer roller, the arc-shaped coating die being slidable left and right along the metering roller in the axial direction of the metering roller. The multi-roll coating system as claimed in claim 1, wherein the metering roller frame is provided with a first group of cylinders for controlling the metering roller to be pressed or separated from the transfer roller, and the bottom frame is provided with a controllable metering A roll frame and a second set of cylinders of the transfer roll frame that move along the bottom slide and are pressed or separated from the coating roll. The multi-roll coating system as claimed in claim 2, wherein the metering roller is driven by a servo motor through a timing belt after being decelerated, and the transfer roller is driven by a servo motor to be driven by a gear, and the arc coating die is a servo motor. Driven by the chain after deceleration. The multi-roll coating system of claim 3, wherein the bottom frame is provided with a foot cup and a roller. The multi-roll coating system of claim 3, wherein a scraper holder is disposed under the metering roller, the doctor frame comprising a set of cylinders and a silicone blade, the set of cylinders can push the silicone blade to contact or separate from the metering roller A waste rubber disc is disposed under the metering roller, and the waste rubber disc is fixed on the metering roller frame. The multi-roll coating system of claim 5, wherein the transfer roll frame is provided with a waste plastic disk located below the transfer roller. The multi-roll coating system of claim 6, further comprising a base disposed on a rear side of the bottom frame, the coating roller being fixed on the base and driven by a driving device disposed on the base, the base is provided There is a waste plastic tray located below the coating roll. The multi-roll coating system of claim 7, further comprising a connecting device for connecting the bottom frame and the base, the connecting device comprising a connecting screw mounted on the bottom frame and a connection mounted on the base Screw hole. The multi-roll coating system as claimed in claim 3, further comprising a glue supply device disposed on the front side of the bottom frame for supplying glue, the glue supply device and the arc-shaped coating die being connected by a heat-insulating pipe. The multi-roll coating system as claimed in claim 9, wherein the glue supply device comprises two glue barrels, two metering gear pumps and a static mixing tube, and the glue barrel, the metering gear pump and the static mixing tube are used. The pipe is connected to the arc-shaped coating die. The glue can is provided with a pressure plate, a heating plate and a melt buffer from top to bottom. The lower surface of the glue barrel is funnel-shaped. A weight sensor is mounted on the outside of the lower surface. The multi-roll coating system as claimed in claim 10, wherein the glue barrel is provided with a cover barrel, and the cover barrel is provided with a cylinder for controlling the movement of the platen and a pressure gauge for displaying the pressure in the glue barrel. a pipe for connecting the melt canister outlet, the metering gear pump and the static mixing pipe, having a heating and heat preservation function, the pipe is provided with a valve, and A pressure sensor is disposed on the pipe for connecting the metering gear pump and the static mixing pipe. The multi-roll coating system as claimed in claim 11, wherein the two metering gear pumps have a heating and heat preservation function, and are driven by a servo motor after being decelerated by a speed reducer, and can be adjusted by adjusting two rotating speeds of the gear pump. The ratio between the two components of the glue. The multi-roll coating system of claim 11, wherein the static mixing tube outer wall is sheathed with a heating sleeve. The multi-roll coating system as claimed in claim 12, wherein a vacuum pump and a nitrogen bottle are connected to at least one of the cover barrels of the glue barrel, and a line and a valve are disposed between the vacuum pump and the cover barrel, the nitrogen bottle Pipes and valves are provided between the lid and the lid.