CN218360331U

CN218360331U - Overflow glue groove for vertical coating

Info

Publication number: CN218360331U
Application number: CN202220993838.5U
Authority: CN
Inventors: 惠磊; 张少斐; 何博阳; 范婷婷
Original assignee: Ningbo Turbulence Electronic Materials Co ltd
Current assignee: Ningbo Turbulence Electronic Materials Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2023-01-24
Anticipated expiration: 2032-04-27

Abstract

The utility model discloses an overflow rubber tank for vertical coating, which comprises a gumming tank body and an overflow diversion tank positioned at the periphery of the gumming tank body, wherein an overflow baffle for separating the two tank bodies is arranged between the gumming tank body and the overflow diversion tank, and the overflow baffle is provided with an overflow port for communicating the two tank bodies; the glue dipping device is provided with at least one lower feed inlet and at least one upper feed inlet, wherein the upper feed inlet and the lower feed inlet are vertically positioned in a glue dipping tank body; possess at least one side and strike the feed inlet, the glue solution export orientation of side impact feed inlet does benefit to the glue solution and flows to the direction of overflow guiding gutter through the overflow mouth. The overflow glue tank can effectively prevent the occurrence of a flowing dead zone in the glue tank body, and can eliminate bubbles on the surface of the glue solution as far as possible.

Description

Overflow glue groove for vertical coating

The technical field is as follows:

the utility model belongs to rubber, polymer processing field relate to the vertical gumming coating technique of curtain cloth, the fine cloth of glass, more specifically relate to a be used for vertical coated overflow to glue groove.

Background art:

the vertical coating is a high molecular processing and forming technology, which is to continuously coat high molecular emulsion on one side or two sides of a supporting material, and then to form a sheet material or a coil material which is composed of a high molecular polymer and the supporting material thereof after heating, drying, curing and shaping. Due to the difference of the selection of the macromolecule emulsion and the selection of the supporting material, the product can be applied to the aspects of industrial life. Such as PVC canvas for water resistance and obstruction, dipped nylon cord fabric for reinforcing automobile tires and manufacturing conveyor belts, polyester cord fabric and the like. In the electronic industry chain, vertical coating is widely applied to the manufacture of copper clad laminates, especially prepregs. Among them, the glue tank is an important part in a vertical coater apparatus.

At present, the existing copper-clad plate manufacturers generally adopt the structure of an overflow glue tank. The method is characterized in that new glue stock is continuously supplemented into the glue tank, and old glue stock in the glue tank is discharged from the overflow port, so that the uniformity and the viscosity stability of the glue solution in the glue tank are controlled, and the thickness precision of the produced prepreg is ensured to be controllable. However, in actual production, the prior art scheme usually only supplements from the lower part of the glue tank inwards, and a flow dead zone exists, so that the problem of local non-uniform viscosity can occur, and the content of the prepreg resin is not uniform in the transverse direction and the longitudinal direction; on the other hand, since the glue solution is continuously circulated, the bubbles are often gathered in the glue tank, and if a large number of bubbles adhere to the surface of the base fabric, the coating quality is affected. Patent CN203803746U has designed the structure of a plurality of overflow valves to control the flow direction and the mobility of glue solution, realizes the regulation to the glue groove liquid level simultaneously, eliminates surface gathering bubble simultaneously. However, the above design does not improve the condition of the dead zone of the glue solution flowing between the glass fiber cloths in the glue tank; meanwhile, the valves are controlled, and the difficulty is increased for structural design of the glue groove and parameter adjustment in actual production.

The utility model has the following contents:

in view of the above problem, an object of the present invention is to provide a novel overflow glue tank for vertical coating, which solves the problem of flow dead zone in the vertical glue tank, and eliminates the bubbles on the surface of the glue solution as much as possible.

The conception of the utility model is that: by reasonably distributing the outlet positions of the glue solution and controlling the outlet speed of the glue solution at the key position, the circulation of the glue solution is more sufficient, and the flowing dead zone in the vertical gluing operation process is eliminated. Meanwhile, the flow direction and the flow speed of the surface glue solution are controlled by the method, so that the bubbles are gathered towards the overflow port, and most of the bubbles floating on the surface of the glue solution are taken away.

In order to achieve the above concept, the present invention has the following specific schemes:

the utility model provides a groove is glued to overflow for vertical coating, its structure contains: the glue dipping tank comprises a glue dipping tank body, a lower feeding hole, an upper feeding hole, a side impact feeding hole, an overflow baffle, an overflow diversion trench and an overflow collecting tank. The overflow diversion groove is positioned around the impregnation groove body, and the overflow baffle is positioned between the impregnation groove body and the overflow diversion groove and used for separating the two groove bodies. The upper feed port and the lower feed port are respectively positioned in the impregnation tank body from top to bottom, the overflow baffle is provided with an overflow port for communicating the two tank bodies, and the overflow port is a height-adjustable overflow port.

The number of the lower feed inlets is at least one, and the lower feed inlets are arranged in a manner of deviating from the bottom of the impregnation tank body, preferably arranged at the bottom of the impregnation tank body. If only one lower feed inlet is arranged, the lower feed inlet is arranged at the center of the bottom of the impregnation tank body in a biased manner, and preferably arranged at the center of the bottom of the impregnation tank body; if the number is more than one, the glue dipping tanks are arranged at the bottom centers along the length direction of the glue dipping tank body at even intervals.

The number of the upper feed inlets is at least one, and the upper feed inlets are arranged in a manner of being deviated to the upper part of the impregnation tank body. If only one upper feed inlet is arranged, the upper feed inlet is deviated to the center of the upper part of the impregnation tank body; if the number is more than one, the upper parts of the glue dipping tanks in the length direction are inclined to be arranged at even intervals in the middle. Through the upper feed inlet, the glue solution between the base fabrics in the vertical gluing process can also participate in the overall circulation of the glue solution, and the local nonuniformity of the glue solution is reduced.

The overflow baffle comprises at least one fixed baffle and a movable overflow baffle. The fixed baffle is connected with the movable overflow baffle in a sliding mode, and the position of the movable overflow baffle can be adjusted up and down to form an overflow port with adjustable height.

The top of the movable overflow baffle is of a sawtooth structure or a mesh structure. The sawtooth structure or the mesh structure helps to eliminate air bubbles in the overflow glue.

The number of the side impact feed inlets is at least one, the side impact feed inlets are arranged on the side edges of the overflow glue groove, and glue solution outlets of the side impact feed inlets face the cloth cover or the side edges of the base cloth which is vertically glued; and the glue solution outlet of the lateral impact feed port faces the direction which is favorable for the glue solution to flow to the overflow diversion trench through the overflow port.

Wherein, the height position of the side impact feed inlet is not higher than the lowest height position of the overflow port.

Preferably, the height of the lateral impact feed inlet is 10MM to 30MM below the lowest height of the overflow outlet.

The size of the outlet flow of the glue solution at the side impact feed inlet is adjustable, and the side impact feed inlet is a material inlet with the adjustable outlet flow of the glue solution.

The flow direction and the flow speed of the glue solution surface in the glue tank can be controlled by adjusting the flow of the side feed inlet and the height of the overflow port, so that the bubbles on the glue solution surface are gathered towards the overflow port, and the bubbles are eliminated.

The bottom of the overflow diversion trench inclines towards the direction of the overflow collecting trench, and the inclination angle is 1-10 degrees. The overflow port is positioned on the higher side of the bottom of the overflow diversion trench. The width of the overflow port is not more than 1/2 of the length of the glue dipping tank body.

Preferably, the top of the overflow diversion trench is further provided with a separable cover plate.

The overflow collecting tank is provided with a liquid level height detection device, a valve and a valve control system, and the opening and closing of the valve are controlled by the control system according to the liquid level height, so that air is prevented from being mixed into backflow glue solution to form micro bubbles.

The utility model discloses an useful part lies in: through the position of reasonable distribution feed inlet, control feed rate, and then control gluey inslot fluidic flow direction and surface flow velocity to the problem of the uneven and bubble gathering of viscosity that flow detention district caused has effectively been reduced gluey inslot. The thickness uniformity and the apparent quality of the prepreg in the vertical coating production are ensured.

These and other exemplary embodiments, aspects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.

Description of the drawings:

fig. 1A, fig. 1B, and fig. 1C are a schematic perspective view, a schematic rear view, and a schematic top view of a first embodiment of the present invention, respectively.

Fig. 2 is a schematic diagram of a height-adjustable overflow port design (including a fixed baffle and a movable overflow baffle) according to an embodiment of the present invention.

Fig. 3 is a schematic design diagram of an upper feed inlet in another embodiment of the present invention.

Fig. 4 is a schematic design diagram of an overflow guiding gutter, an overflow port and a side impact feeding port according to another embodiment of the present invention.

The specific implementation mode is as follows:

referring to fig. 1A-C and 2, an exemplary embodiment of the present invention is described. In which fig. 2 depicts a schematic view of the design of the overflow in the embodiment of fig. 1.

FIG. 1A is a schematic view of the combination of an overflow glue tank, a bottom turning roll and a base cloth of a vertical glue spreader. Wherein, three lower feed inlets 2 are arranged at the bottom of the impregnation tank body 1. An upper feeding port 3 is arranged at the central position of the upper part of the impregnation tank body 1, and the upper feeding port 3 is positioned between the upward glass fiber cloth (not marked) and the downward glass fiber cloth (not marked). One side of the impregnation tank body 1 is provided with an overflow diversion trench 4, and the bottom of the overflow diversion trench 4 inclines to one side. The glue dipping tank body 1 and the overflow pouring groove 4 are separated by an overflow baffle 5. An overflow port 6 with adjustable height is arranged on one side of the overflow baffle 5, and a sawtooth structure is arranged above the overflow port 6. The side of the impregnation tank body 1 is provided with a first side impact feed inlet 7 and a second side impact feed inlet 8. In one embodiment of the present invention, the structure is made of stainless steel and the inner surface has a teflon lining. In the process of vertical coating operation, glue solution with constant viscosity and components continuously enters a glue dipping tank body 1 through an upper feeding hole 3, a part of glue solution is coated on glass fiber cloth, and the rest glue solution enters an overflow diversion trench 4 through an overflow port 6; the height of the liquid level in the dipping tank body 1 is controlled by the height of the overflow port 6; the glue solution entering the overflow diversion trench 4 is converged into a collecting trench (not shown in fig. 1) from the outlet of the overflow diversion trench 4; and pumping the glue solution in the collecting tank into a viscosity adjusting circulation system of the glue solution again.

Referring to fig. 1B, fig. 1B is a rear view of the assembly. In the above embodiment, the horizontal inclination angle α =2 ° of the bottom surface of the overflow guiding gutter 4 helps the overflow glue solution to flow into the collecting gutter smoothly. In another embodiment of the present invention, a cover plate (not shown) is disposed above the overflow guiding gutter 4. The cover plate can reduce the volatilization of the solvent in the flowing of the glue solution and prevent the solvent in the overflow diversion trench 4 from volatilizing to generate caking. In FIG. 1B, the first side impingement feed port 7 and the second side impingement feed port 8 have a height below the lowest height of the overflow port 6, and in one exemplary embodiment, a height difference d ₁ =10MM. Fig. 1B shows the positions of the lower feed port 2 and the upper feed port 3, and the flow directions of the dope entering from the

feed ports

2, 3, the flow directions being indicated by solid arrows. For clarity, the structure of the fiberglass cloth and the bottom dip roll are omitted from the figure. In an exemplary embodiment, the upper feed inlet 3 is below the glue level d ₂ =50MM. Most of the glue solution flowing from the upper feed inlet 3 flows toward both sides of the base fabric along the direction shown in the figure due to the space limitation of the ascending glass fiber cloth, the descending glass fiber cloth and the bottom glue dipping roller. The design promotes the uplink and downlink glassThe glue solution between the fabrics participates in the whole circulation, and the flow detention area in the area is eliminated.

Please refer to fig. 1C. Fig. 1C is a schematic top view of the assembly of fig. 1A, wherein the upper feed port 3, the first lateral impingement feed port 7, the second lateral impingement feed port 8, the overflow port 6, the first fiberglass cloth 11, and the second fiberglass cloth 12 are indicated. The flow direction of the glue is indicated by a solid arrow. The feed rates of the first side impingement feed 7 and the second side impingement feed 8 are adjustable. In one embodiment of the present invention, the first side impacts the circular pipe with the diameter of 35MM for the feed inlet 7 and the second side impacts the circular pipe with the feed inlet 8. In the embodiment, preferably, the outlet speed of the glue solution in the working state is not lower than 50MM/s, and the discharging speed is not lower than 3L/min. Moreover, the liquid level of the glue solution can be adjusted through the height of the overflow port. Preferably, the height of the glue outlet can be 10MM to 30MM below the liquid level. In the operation process, when bubbles are gathered on the surface of glue liquid in the overflow glue tank or a large number of bubbles are attached to the side wall of the overflow glue tank, the operation of reducing the height of the liquid level and improving the feeding speed of the side impact feeding port can be adopted, and the flowing speed of surface glue liquid is increased. The air bubbles generated on the liquid surface enter the overflow diversion trench through the overflow port 6, thereby playing a role in eliminating the accumulation of the air bubbles.

Fig. 2 shows a possible example of the combination of a fixed baffle and a movable overflow baffle in the present invention as an overflow baffle 5. Wherein, be provided with recess (unmarked) on the fixed stop (unmarked), the recess below sets up two circular ports 21 and is used for the fixed screw position. The width of the movable overflow baffle (not marked) is larger than that of the groove, two rectangular holes 22 are formed in the movable overflow baffle, and the upper edge 23 of the movable overflow baffle is of a sawtooth structure. The movable overflow baffle is connected with the fixed baffle through two bolts/nuts. The movable overflow baffle can slide up and down at a limited position to form an overflow port with adjustable height. In this embodiment, the height of the overflow opening can be adjusted by manually pulling the height of the movable overflow flap. It is contemplated that in other embodiments of the present invention, the movable overflow baffle may further comprise a motor and other transmission devices to achieve automatic height adjustment.

It should be understood that, in the present invention, the number of the upper feed inlets may be more than one. The size, number, position and direction of the upper feed ports are not particularly limited as long as the flow stagnation region between the base fabrics can be eliminated. For example, fig. 3 schematically shows the structural design of another preferred embodiment of the present invention, two first upper feed inlets 31 and two second upper feed inlets 32 are provided, which are respectively located at 1/3 and 2/3 of the length of the overflow glue groove, and this design can effectively increase the discharge amount of the upper feed inlets.

Furthermore, the utility model discloses in, overflow guiding gutter and side impact feed inlet's structure and design are not restricted to above-mentioned embodiment, can satisfy the foreside under the prerequisite of principle and function, adopt other reasonable designs. The utility model is used for measuring the number, position and size of the overflow diversion trench; the position and number of the overflow ports; and the number, location, and size of the side impact feed ports are not otherwise limited by the claims. Referring to fig. 4, another possible example of the present invention includes two first overflow drainage grooves 41 and two second overflow drainage grooves 42, two first overflow ports 43 and two second overflow ports 44, and two third side impact feed ports 45 and four side impact feed ports 46. Wherein, the glue solution discharged from the third side impact feed inlet 45 causes the bubbles at one side in the overflow glue groove to gather towards the first overflow port 43 and flow into the first overflow drainage groove 41; on the other side of the overflow glue groove, the fourth side impact feed port 46 can enable the air bubbles on the other side to gather to the second overflow port 44 and flow out of the second overflow diversion groove 42, and the design can play a role in eliminating the air bubbles in the glue groove.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the present invention be limited to the specific embodiments shown and described. For those skilled in the art, without departing from the spirit of the present invention, several simple deductions or substitutions may be made, which should be considered as falling within the protection scope of the present invention.

Claims

1. The utility model provides an overflow rubber slot for vertical coating, includes the gumming cell body and is located the peripheral overflow guiding gutter of gumming cell body, be equipped with the overflow baffle that is used for separating two cell bodies between gumming cell body and the overflow guiding gutter, the overflow baffle is equipped with the overflow mouth that is used for communicateing two cell bodies, its characterized in that:

the glue dipping device is provided with at least one lower feed inlet and at least one upper feed inlet, wherein the upper feed inlet and the lower feed inlet are vertically positioned in a glue dipping tank body;

possess at least one side and strike the feed inlet, the glue solution export orientation of side impact feed inlet does benefit to the glue solution and flows to the direction of overflow guiding gutter through the overflow mouth.

2. The overflow glue tank of claim 1, wherein the upper feed inlets, if only one, are disposed towards the center of the upper part of the glue tank body; if the number is more than one, the glue dipping tanks are inclined to be arranged at intervals in the upper part along the length direction of the glue dipping tank body.

3. The overflow glue tank of claim 1 or 2, wherein only one lower feed inlet is arranged in a manner of being biased to the center of the bottom of the glue tank body; if the number is more than one, the glue dipping tanks are inclined to be arranged at intervals at the bottom in the length direction of the glue dipping tank body.

4. The overflow glue tank as claimed in claim 1, wherein the overflow port is a height-adjustable overflow port, the overflow baffle comprises a fixed baffle and a movable overflow baffle, the fixed baffle and the movable overflow baffle are slidably connected, and the position of the movable overflow baffle is adjusted up and down to form the height-adjustable overflow port.

5. The overflow glue tank of claim 1, 2 or 4, wherein the side impact feed inlet is arranged on the side edge of the overflow glue tank, and the glue outlet of the side impact feed inlet faces the cloth cover or the side edge of the base cloth which is vertically sized; the height position of the lateral impact feed port is not higher than the lowest height position of the overflow port.

6. The overflow glue tank of claim 5, wherein the lateral impact feed port is a feed port with adjustable glue outlet flow.

7. The overflow glue tank of claim 1, wherein the overflow glue tank is further provided with an overflow collecting tank, and the overflow diversion tank is communicated with the overflow collecting tank; the bottom of the overflow diversion trench inclines towards the direction of the overflow collecting trench; the inclination angle is 1 ° to 10 °.

8. The overflow glue tank of claim 7, wherein the overflow port is located on the higher side of the bottom of the overflow diversion trench; the width of the overflow port is not more than 1/2 of the length of the glue dipping tank body.

9. The overflow glue trough of claim 4, wherein the top of the moving overflow baffle is of a sawtooth structure or a mesh structure.

10. The overflow glue tank of claim 7 wherein said overflow collection tank is equipped with a liquid level detection device, a valve, and a valve control system; the opening and closing of the valve are controlled by the control system according to the liquid level height in the overflow collecting tank.