Method for controlling amount of adhesive for adhering curved-surface screen of mobile phone with high precision and low cost
Technical Field
The invention relates to the technical field of installation of curved-surface mobile phone screens, in particular to a method for controlling the amount of adhesive for the adhesive of a curved-surface mobile phone screen, which is high in precision and low in cost.
Background
A mobile phone with a curved screen is characterized in that the screen of the mobile phone is a plane and has a certain radian, as the name suggests, different from the traditional mobile phone. The curved-surface screen mobile phone has the advantages that the material of the curved-surface screen is not easy to damage; the curved screen is displayed clearly; the curved screen has low thickness, light weight and low power consumption. The curved screen mobile phone has more advantages, so the curved screen mobile phone is widely used.
The curved screen of the curved screen mobile phone is generally bonded by glue, and because the mobile phone has a small volume, the aesthetic property of the mobile phone needs to be emphasized, and the glue dispensing amount of the curved screen during bonding needs to be strictly controlled. An existing glue dispensing device, such as an automatic glue dispensing machine, is configured to push out a glue solution within a set time by using air pressure. The time of each drop is controlled by the meter, and the same drop amount is ensured in each drop. The injection amount can be easily changed by adjusting the air pressure and time and selecting a proper needle nozzle. Although this process is technically high, it is also costly.
There are other glue amount control methods, which dispense glue by controlling a glue pump or by controlling a glue dispensing valve, for example, in a patent of a mobile phone lens protective sheet molding glue storage amount self-checking type multi-dispenser with patent publication No. CN107185776B, a method of dispensing glue by controlling a glue pump is adopted, and in a patent of a mobile phone lens dispenser with patent publication No. CN208976171U, a method of controlling glue amount by using a glue dispensing valve is disclosed.
Although the cost is low in the above two modes, when the mobile phone is used, the dispensing amount is too much or too little, and the dispensing amount cannot be accurately and precisely controlled, so that the quality of the mobile phone is too low. Therefore, a method for controlling the amount of the adhesive for the curved-surface screen of the mobile phone with high precision and low cost is provided.
Disclosure of Invention
The invention aims to provide a high-precision and low-cost method for controlling the glue dispensing amount of a curved-surface screen of a mobile phone.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for controlling the amount of adhesive for the adhesive of a curved-surface screen of a mobile phone with high precision and low cost comprises the following steps:
step 101, preparing a sealed melting tank for melting hot melt adhesive of a curved surface screen of a mobile phone, and adding a proper amount of hot melt adhesive material into the melting tank;
step 102, setting heating temperature and heat preservation temperature parameters, and melting the hot melt adhesive in the melting tank in a heating mode;
103, communicating a pressure maintaining tank with the top of the melting tank, wherein the pressure maintaining tank can provide stable air pressure and is used for filling compressed air into an upper space in the melting tank, so that certain pressure is provided in the melting tank, and the hot melt adhesive liquid in the melting tank can be driven to discharge;
104, communicating a glue outlet mechanism with one side of the bottom of the melting tank of the hot melt adhesive, wherein the glue outlet mechanism comprises a flat hose for discharging glue, and the glue solution is extruded into the flat hose under the action of pressure due to the higher pressure in the melting tank;
and 105, a rotating compression roller for extruding the flat hose in a fixed length is further arranged, a plurality of groups of rotating compression rollers are arranged, the rotating compression rollers are uniformly and equidistantly arranged on a chain, the chain is driven to rotate through a driving motor, the rotating compression rollers are enabled to roll on the flat hose, and accordingly uniform quantitative discharging is achieved.
Through adopting above-mentioned technical scheme, through the point glue method of controlling extrusion length to the flat hose, the volume of gluing can be controlled more meticulously, and the precision of the volume of gluing has been improved to multiunit equivalent control simultaneously.
Preferably, go out and still be provided with the constant temperature mechanism who avoids thermosol to solidify in the flat flexible pipe on the gluey mechanism, utilize constant temperature mechanism to heat the flat flexible pipe, avoid the inside glue of flat flexible pipe to solidify, impel it to go out gluey smoothly.
Through adopting above-mentioned technical scheme, set up constant temperature mechanism at play gluey mechanism, avoid the hot melt adhesive to solidify at the inside cooling of pipeline, improve and go out gluey smoothness degree and play gluey quality.
Preferably, the flat hoses are provided with 4-5 groups, the flat hoses are adhered to a bottom plate in parallel, and one end of the bottom plate, provided with the through hole for the flat hose, penetrates through the through hole.
Through adopting above-mentioned technical scheme, can extrude multiunit flat hose simultaneously, the glue solution supply of a plurality of syringe needles can be realized to a set of mechanism.
Preferably, the pressure holding tank is used to provide a stable gas pressure, and the gas pressure can be adjusted.
Through adopting above-mentioned technical scheme, through atmospheric pressure regulation, be convenient for adjust pressure according to the consistency of glue solution, convenient to use.
Preferably, the method also comprises equipment matched with the method for use, wherein the equipment comprises a melting tank and an air compressor, an outlet of the air compressor is communicated with a pressure maintaining tank, and an air outlet of the pressure maintaining tank is communicated with the upper end of the melting tank through a vent pipe; melt one side fixedly connected with bottom plate of jar, the fixed bonding in upper portion of bottom plate has the lay flat hose, the through-hole has been seted up on the bottom plate, the one end of lay flat hose with melt bottom one side intercommunication of jar, and the other end of lay flat hose runs through-hole and intercommunication have coupling hose, the upper portion fixedly connected with shell of bottom plate, driving sprocket and driven sprocket are installed to the internal rotation of shell, install two sets of chains on driving sprocket and the driven sprocket, and rotate between two sets of chains and install the rotation compression roller, the lower part pressure of rotating the compression roller is in on the lay flat hose, the outside one end fixed mounting of shell has driving motor, driving motor's one end with driving sprocket connects.
By adopting the technical scheme, the equipment is matched with the method for use, and high-precision dispensing can be realized by utilizing the equipment according to the method.
Preferably, the dispensing device further comprises a needle fixing plate, a dispensing needle is fixedly connected to the needle fixing plate, and one end of the connecting hose is communicated with the upper end of the dispensing needle; the upper portion of syringe needle fixed plate still installs the electric jar of vertical setting, the upper end fixed connection of electric jar is on the lower part surface of bottom plate.
Through adopting above-mentioned technical scheme, fix a syringe needle on a syringe needle fixed plate through gluing the syringe needle with a point, can glue convenient to use by gluing the syringe needle of gluing of while operation.
Preferably, the upper end of the melting tank is further provided with a feed inlet, and a threaded plug cover is hermetically mounted on the feed inlet.
Through adopting above-mentioned technical scheme, can realize the supply of sizing material through the feed inlet, be provided with heating mechanism and temperature balance mechanism in melting tank and be used for melting the sizing material.
Preferably, the far infrared heating plate is installed inside the shell, and the shell is provided with a wire hole through which a connecting wire of the far infrared heating plate can conveniently pass; the shell is also provided with a temperature controller and a temperature sensor for detecting the temperature inside the shell, one end of the temperature sensor is electrically connected with the temperature controller through a wire, and the electric control end of the temperature controller is electrically connected with the far infrared heating plate through a wire.
Through adopting above-mentioned technical scheme, utilize far infrared hot plate can contactless heat the flat flexible pipe, avoid the temperature of the inside glue solution of flat flexible pipe to distribute too fast, cause to condense or glue solution temperature to reduce.
Preferably, the interior of the flat hose is provided with an elliptical inner bore.
Through adopting above-mentioned technical scheme, the structure of oval hole is convenient for extrude.
Preferably, a pressure regulating valve for regulating air pressure is further installed on the pressure maintaining tank.
By adopting the technical scheme, the whole pressure in the melting tank can be adjusted by adjusting the air pressure.
Compared with the prior art, the invention has the beneficial effects that:
when the device is used, the molten hot melt adhesive is introduced into the flat hose, and the high-precision accurate quantitative glue dispensing amount can be obtained by extruding the flat hoses with different lengths; the problem of poor quality of the mobile phone caused by too much or too little glue dispensing amount is avoided; the invention can simultaneously and uniformly supply the glue amount of a plurality of groups of glue dispensing needle heads by utilizing the driving motor, thereby meeting the use requirement of bonding the curved screen of the mobile phone; through the dispensing method for controlling the extrusion length of the flat hose, the dispensing amount can be finely controlled, multiple groups of equal amount can be simultaneously controlled, and the dispensing amount precision is improved.
Drawings
FIG. 1 is a flow chart of a method for controlling the amount of adhesive dispensing for a curved surface screen of a high-precision mobile phone according to the present invention;
FIG. 2 is a schematic structural diagram of a device for controlling the amount of adhesive applied to the curved-surface screen of the high-precision mobile phone according to the present invention;
FIG. 3 is a schematic structural diagram of the base plate of the present invention;
FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 3 according to the present invention;
FIG. 5 is a schematic view of the chain and rotating nip roller of the present invention;
fig. 6 is a schematic structural view of the far infrared heating panel inside the outer case according to the present invention.
In the figure: 1. a melting tank; 2. a feed inlet; 3. a thread plug; 4. a housing; 41. a far infrared heating plate; 5. a drive motor; 501. a drive sprocket; 502. a chain; 503. rotating the press roller; 504. a driven sprocket; 6. a base plate; 601. a flat hose; 602. a through hole; 603. an elliptical inner bore; 7. an electric cylinder; 8. a needle head fixing plate; 9. a connecting hose; 10. dispensing a needle head; 11. an air compressor; 12. a pressure maintaining tank; 13. a pressure regulating valve; 14. a breather tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a technical solution:
a method for controlling the amount of adhesive for the adhesive of a curved-surface screen of a mobile phone with high precision and low cost comprises the following steps:
step 101, preparing a sealed melting tank 1 for melting hot melt adhesive of a curved surface screen of a mobile phone, and adding a proper amount of hot melt adhesive material into the melting tank 1;
step 102, setting heating temperature and heat preservation temperature parameters, and melting the hot melt adhesive in the melting tank 1 in a heating mode;
103, communicating a pressure maintaining tank 12 with the top of the melting tank 1, wherein the pressure maintaining tank 12 can provide stable air pressure for filling compressed air in the upper space of the melting tank 1, so that the melting tank 1 has a certain pressure to promote the discharging of the hot melt adhesive liquid in the melting tank 1;
104, communicating a glue outlet mechanism with one side of the bottom of the melting tank 1 of the hot melt adhesive, wherein the glue outlet mechanism comprises a flat hose 601 for discharging glue, and the glue solution is extruded into the flat hose 601 under the action of pressure due to the large internal pressure of the melting tank 1;
step 105, a rotating pressing roller 503 for extruding the flat hose 601 in a fixed length is further arranged, the rotating pressing roller 503 is provided with a plurality of groups, the groups of rotating pressing rollers 503 are uniformly and equidistantly installed on a chain 502, the chain 502 is driven to rotate through a driving motor 5, the rotating pressing roller 503 is enabled to roll on the flat hose 601, and therefore uniform and quantitative discharging is achieved.
Specifically, a thermostatic mechanism for preventing thermosol from being solidified inside the flat hose 601 is further arranged on the glue outlet mechanism, the thermostatic mechanism is used for heating the flat hose 601, the glue inside the flat hose 601 is prevented from being solidified, and smooth glue outlet is facilitated. The flat hoses 601 are provided with 4-5 groups, and the flat hoses 601 are all adhered to a bottom plate 6 in parallel, and one end of the bottom plate 6, provided with the through hole 602 for the flat hose 601 to pass through, is provided. The pressure holding tank 12 is used to provide a stable gas pressure, and the gas pressure can be adjusted.
The device comprises a melting tank 1 and an air compressor 11, wherein the outlet of the air compressor 11 is communicated with a pressure maintaining tank 12, and the air outlet of the pressure maintaining tank 12 is communicated with the upper end of the melting tank 1 through an air pipe 14; one side of the melting tank 1 is fixedly connected with a bottom plate 6, the upper part of the bottom plate 6 is fixedly adhered with a flat hose 601, the bottom plate 6 is provided with a through hole 602, one end of the flat hose 601 is communicated with one side of the bottom of the melting tank 1, the other end of the flat hose 601 penetrates through the through hole 602 and is communicated with the connecting hose 9, the upper part of the bottom plate 6 is fixedly connected with the shell 4, the driving chain wheel 501 and the driven chain wheel 504 are rotatably arranged in the shell 4, the driving chain wheel 501 and the driven chain wheel 504 are provided with two groups of chains 502, and a rotary compression roller 503 is rotatably installed between the two sets of chains 502, the lower part of the rotary compression roller 503 is pressed on the flat hose 601, one end of the outer part of the shell 4 is fixedly provided with a driving motor 5, one end of the driving motor 5 is connected with the driving sprocket 501, it should be noted that, in the specific implementation, the drive motor 5 is provided as a stepping motor, and the length of each step is equal to the interval between the rotating pressing rollers 503.
Specifically, the dispensing needle comprises a needle head fixing plate 8, a dispensing needle head 10 is fixedly connected to the needle head fixing plate 8, and one end of a connecting hose 9 is communicated with the upper end of the dispensing needle head 10; the upper part of the needle fixing plate 8 is also provided with an electric cylinder 7 which is vertically arranged, and the upper end of the electric cylinder 7 is fixedly connected to the lower surface of the bottom plate 6. The upper end of the melting tank 1 is also provided with a feed inlet 2, and the feed inlet 2 is hermetically provided with a thread blanking cover 3.
Wherein, the inside of the outer shell 4 is provided with a far infrared heating plate 41, and the outer shell 4 is provided with a wire hole for the connecting wire of the far infrared heating plate 41 to pass through; still install the temperature controller on the shell 4 and be used for detecting the temperature sensor of the inside temperature of shell 4, temperature sensor's one end passes through wire and temperature controller electric connection, and the automatically controlled end of temperature controller passes through wire and 41 electric connection of far infrared hot plate. The interior of the flat hose 601 is provided with an oval inner hole 603, and a rubber pad is integrally connected to the lower portion of the flat hose 601, and the bottom of the rubber pad is fixed to the bottom plate 6 by glue. The pressure-maintaining tank 12 is also provided with a pressure-regulating valve 13 for regulating the air pressure.
In conclusion, when the device is used, the molten hot melt adhesive is introduced into the flat hose 601, and the glue dispensing amount can be accurately and quantitatively obtained with high precision by extruding the flat hoses 601 with different lengths; the problem of poor quality of the mobile phone caused by too much or too little glue dispensing amount is avoided; the invention can simultaneously and uniformly supply the glue amount of a plurality of groups of glue dispensing needle heads by utilizing the driving motor 5, thereby meeting the use requirement of bonding the curved screen of the mobile phone; through the dispensing method for controlling the extrusion length of the flat hose 601, the dispensing amount can be finely controlled, multiple groups of equal amount can be simultaneously controlled, and the precision of the dispensing amount is improved.
The parts not involved in the present invention are the same as or can be implemented by the prior art. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.