CN113083608A - Precise dispensing mechanism for bi-component glue - Google Patents

Abstract

The embodiment of the application belongs to the technical field of glue dispensing equipment, and relates to a double-component glue precise glue dispensing mechanism. The technical scheme provided by the application comprises a mounting plate, a valve A, a valve B, a mixing cavity, a mixing pipe, a refrigerating cavity and a needle head; a valve and B valve are located on the mounting panel, the hybrid chamber is located A valve and B valve go out gluey one end, be used for right A valve and B valve exhaust glue mix, the refrigeration chamber is located the hybrid chamber dorsad the one side of A valve and B valve, the hybrid tube is located the refrigeration intracavity and with the hybrid chamber is connected, is used for right A valve and B valve exhaust glue mix, the refrigeration chamber will the hybrid tube fastening in on the hybrid chamber, the syringe needle is located the refrigeration chamber dorsad the one side of hybrid chamber. The refrigerating cavity contains the whole mixing pipe, the refrigerating effect is good, and the curing time of the mixed glue can be effectively prolonged; the valve A and the valve B can be independently metered, and high-precision mixing ratio can be realized.

Description

Precise dispensing mechanism for bi-component glue

Technical Field

The application relates to the technical field of glue dispensing equipment, and more specifically relates to a precise glue dispensing mechanism for double-component glue.

Background

In the fields requiring dispensing in the electronic industry, the mobile communication industry and the like, technologies such as volumetric metering type dispensing, AB two-liquid mixed dispensing, precise dispensing, semiconductor refrigeration and the like mainly exist. The existing double-liquid glue dispensing mode mainly comprises three modes, one mode is that a piston is pushed through compressed air so as to extrude glue from a glue cylinder, the other mode is that the piston is pushed through a motor and a lead screw so as to extrude the glue from the glue cylinder, and the other mode is that the glue is extruded through a manual glue gun. The above three methods have the following disadvantages: after being mixed, part of the double-component glue is fast to cure, and the glue needs to be cleaned frequently in the production process; the glue cylinder expands after being pressed, so that the glue yield is difficult to control, and the mixing ratio of the glue is not accurate; the volume is large, and the installation is easy to be limited; the first and third modes are not suitable for high-viscosity glue; the mixing ratio is affected due to different viscosities of the two-component glue.

Disclosure of Invention

The invention aims to provide a precise glue dispensing mechanism for double-component glue, wherein the glue of two components is separately metered through an A valve and a B valve, so that the problem of mixing ratio error caused by different viscosities of the glue of the two components is solved, a refrigerating cavity contains the whole mixing pipe, the refrigerating effect is good, and the curing time after the glue is mixed is effectively prolonged.

In order to solve the above-mentioned problems, embodiments of the present invention provide the following technical solutions:

a precise dispensing mechanism for bi-component glue comprises a mounting plate, a valve A, a valve B, a mixing cavity, a mixing pipe, a refrigerating cavity and a needle head;

the A valve and the B valve are arranged on the mounting plate, the mixing chamber is arranged at one end of the glue discharged from the A valve and the B valve, the refrigerating chamber is arranged on the back of the mixing chamber, one surface of the A valve and the B valve is arranged on the back of the mixing chamber, the mixing pipe is arranged in the refrigerating chamber and connected with the mixing chamber, the glue discharged from the A valve and the B valve is mixed, the refrigerating chamber is fastened on the mixing chamber, and the needle head is arranged on the back of the refrigerating chamber and one surface of the mixing chamber.

Further, be equipped with on the mounting panel and be used for right the refrigerated refrigeration subassembly in refrigeration chamber, the refrigeration subassembly includes connecting plate, refrigeration piece, heat conduction piece, fin, fan and thermal-insulated lid, the connecting plate is located on the mounting panel, the fin is located the connecting plate is close to the one side in refrigeration chamber, the fan is located the connecting plate is kept away from the one side in refrigeration chamber, the cold side of refrigeration piece with the heat conduction piece contact, the hot side of refrigeration piece with the fin contact, the heat conduction piece with the refrigeration chamber contact, thermal-insulated lid is located on refrigeration piece and the heat conduction piece.

Furthermore, a plurality of guide pillars and springs are arranged in the connecting plate, the springs are sleeved on the guide pillars, the guide pillars are matched with the heat conducting blocks, and the heat conducting blocks are attached to the refrigeration cavity under the compression of the springs.

Furthermore, heat-conducting silicone grease is arranged between the refrigerating sheet and the heat-conducting block and between the refrigerating sheet and the radiating sheet.

Further, the valve A and the valve B both comprise a pump, a needle cylinder and a driving mechanism, the pump comprises a piston rod, an upper cover, a cavity, a glue inlet nozzle, a valve body and a valve core, the glue inlet nozzle is arranged on the valve body and connected with the needle cylinder, the valve core is rotatably connected in the valve body to control the opening and closing of the valve body, the lower end of the cavity is connected with the valve body, the cavity is used for storing glue, the upper cover is sleeved on the cavity, the piston rod is slidably connected in the cavity and connected with the output end of the driving mechanism, when the valve body is opened, the driving mechanism drives the piston rod to move downwards to discharge the glue in the cavity, when the valve body is closed, the cavity is communicated with the glue inlet nozzle, and the driving mechanism drives the piston rod to move upwards to pump the glue from the needle cylinder into the cavity.

Furthermore, a rotary cylinder for driving the valve core to rotate is arranged on one side, back to the pump, of the mounting plate.

Further, the driving mechanism comprises a motor, a ball screw and a screw nut, the screw nut converts the rotary motion of the motor into the linear motion of the ball screw, a piston rod positioning seat is arranged at the lower end of the ball screw, and a wedge-shaped structure pressing block used for locking the piston rod on the piston rod positioning seat is arranged on the piston rod positioning seat.

Furthermore, the mounting plate is provided with a guide rail along the vertical direction, and the piston rod positioning seat is provided with two sliding blocks which are connected to the guide rail in a sliding manner.

Further, the valve body lower extreme is equipped with the nut and connects, connect through the nut with the valve body is connected, the hybrid chamber includes upper mixing chamber and lower hybrid chamber, connect through interference fit install in the upper mixing chamber, lower hybrid chamber with the refrigeration chamber passes through the screw connection, refrigeration chamber lower extreme is equipped with the syringe needle nut, the syringe needle nut will the syringe needle with the hybrid tube lower extreme compresses tightly sealedly.

Further, the valve A and the valve B are plunger type metering valves and are symmetrically arranged on the mounting plate.

Compared with the prior art, the embodiment of the invention mainly has the following beneficial effects:

a kind of double-component glue precise dispensing mechanism, the double-component glue is loaded into the glue cylinder of valve A and valve B separately, two plunger type metering valves discharge glue at the same time, when the valve block is opened, the said actuating mechanism drives the piston rod to move downward and spit out the glue in the cavity, when the valve block is closed, the said cavity communicates with glue inlet, the said actuating mechanism drives the piston rod to move upward, draw the glue into the cavity from the said cylinder, realize the operation of continuous dispensing; the glue enters the mixing tube through the mixing cavity to be mixed and then is discharged from the needle head, the whole mixing tube is contained by the refrigerating cavity, the refrigerating effect is good, and the curing time of the mixed glue can be effectively prolonged; the glue of the two components is separately metered through the valve A and the valve B, so that high-precision mixing ratio can be realized, and mixing ratio errors caused by different viscosities of the glue of the two components are solved; because the two motors work respectively, when the requirement on the mixing ratio is high, errors caused by manufacturing and assembling of different valves can be compensated by changing the rotating speed of the motors; the integrated design is realized, and the set of double-component glue precise dispensing mechanism comprises two sets of plunger type metering valves, a mixing mechanism and a cooling mechanism, has compact structure and small appearance, and is hardly limited by the installation space.

Drawings

In order to illustrate the solution of the invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are some embodiments of the invention, and that other drawings may be derived from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a schematic view of the overall structure of a precise dispensing mechanism for two-component glue according to an embodiment of the present invention;

FIG. 2 is a front view of a precise dispensing mechanism for two-component glue according to an embodiment of the present invention;

FIG. 3 is an enlarged view taken at I in FIG. 2;

FIG. 4 is a schematic structural diagram of a refrigeration assembly in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the structure of the valve A and the valve B according to the embodiment of the present invention.

Description of reference numerals:

1. a valve A; 2. a valve B; 3. mounting a plate; 4. a nut; 5. a joint; 6. an upper mixing chamber; 7. a lower mixing chamber; 8. a refrigeration cavity; 9. a screw; 10. a needle nut; 11. a needle head; 12. a mixing tube; 13. a fan; 14. a connecting plate; 15. a heat sink; 16. a refrigeration plate; 17. a heat insulation cover; 18. a heat conducting block; 19. a guide post; 20. a spring; 21. an input/output interface; 22. a motor; 23. a feed screw nut; 24. a ball screw; 25. a piston rod positioning seat; 26. a wedge-structured pressing block; 27. pumping; 28. a rotating cylinder; 30. a piston rod; 31. an upper cover; 32. a cavity; 33. a glue inlet nozzle; 34. a valve body; 35. a valve core.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms "comprising" and "having," and any variations thereof, in the description and claims of the present invention and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the relevant drawings.

Examples

A precise glue dispensing mechanism for double-component glue is shown in figures 1 to 6 and comprises a mounting plate 3, a valve A1, a valve B2, a mixing cavity, a mixing pipe 12, a refrigerating cavity 8 and a needle 11; a valve 1 and B valve 2 locate on the mounting panel 3, the hybrid chamber is located A valve 1 and B valve 2 go out gluey one end, refrigeration chamber 8 is located the hybrid chamber dorsad A valve 1 and B valve 2's one side, hybrid tube 12 is located in refrigeration chamber 8 and with the hybrid chamber is connected, and is used for right A valve 1 and B valve 2 exhaust glue mixes, refrigeration chamber 8 will hybrid tube 12 compresses tightly and is fixed in on the hybrid chamber, syringe needle 11 is located refrigeration chamber 8 dorsad the one side of hybrid chamber.

In the embodiment of the invention, the valve A1 and the valve B2 are plunger metering valves and are symmetrically arranged on the mounting plate 3, and the two glues are respectively and independently metered through the plunger valves and then conveyed to the mixing pipe 12 for mixing, so that high-precision mixing ratio can be realized.

The double-component glue is respectively arranged in the valve A1 and the valve B2, the valve A1 and the valve B2 simultaneously discharge the glue, the glue enters the mixing pipe 12 through the mixing cavity to be mixed, then the glue is discharged from the needle 11, the whole mixing pipe 12 is contained by the refrigerating cavity 8, the refrigerating effect is good, the curing time after the glue is mixed can be effectively prolonged, and the double-component glue is particularly suitable for the double-component glue with short curing time. The glue of two components is separately metered through the valve A1 and the valve B2 respectively and then is conveyed to the mixing pipe 12 to be mixed, so that high-precision mixing ratio can be realized, mixing ratio errors caused by different viscosities of the glue of the two components are solved, an integrated design is realized, and one set of double-component glue precise dispensing mechanism comprises two sets of plunger type metering valves, a mixing mechanism and a cooling mechanism, has a compact structure and a small and exquisite appearance, and is hardly limited by installation space.

As shown in fig. 4, it is right to be equipped with on the mounting panel 3 the refrigerated refrigeration subassembly in refrigeration chamber 8, the refrigeration subassembly includes connecting plate 14, refrigeration piece 16, heat conduction piece 18, fin 15, fan 13 and thermal-insulated lid 17, connecting plate 14 locates on the mounting panel 3, fin 15 locates connecting plate 14 is close to the one side in refrigeration chamber 8, fan 13 locates connecting plate 14 keeps away from the one side in refrigeration chamber 8, the cold face of refrigeration piece 16 with the contact of heat conduction piece 18, the hot face of refrigeration piece 16 with fin 15 contacts, heat conduction piece 18 with refrigeration chamber 8 contacts, thermal-insulated lid 17 is located on refrigeration piece 16 and the heat conduction piece 18. The cold face of refrigeration piece 16 contacts with heat conduction piece 18, refrigerates for refrigeration chamber 8 through heat conduction piece 18, and the hot face of refrigeration piece 16 contacts with fin 15, and fan 13 is the heat dissipation of fin 15, can effectively prolong the curing time after the glue mixes, and the short double-component glue of curing time is particularly useful for. Under the normal use condition, the disassembly and the cleaning are avoided, and only the disposable mixing tube 12 and the needle 11 need to be replaced periodically.

In the embodiment of the invention, the heat insulation cover 17 is made of plastic with low heat conductivity, so that the heat exchange between air and a refrigeration part is reduced.

A plurality of guide posts 19 and springs 20 are arranged in the connecting plate 14, the guide posts 19, the springs 20, the radiating fins 15 and the connecting plate 14 form a flexible structure, the springs 20 are sleeved on the guide posts 19, the guide posts 19 are matched with the heat conducting blocks 18, and the heat conducting blocks 18 are attached to the refrigeration cavity 8 under the compression of the springs 20. In the assembling process, due to the accumulation of machining errors of a plurality of parts, the heat-conducting block 18 and the refrigeration cavity 8 are difficult to be parallel when being installed, the actual contact area is small, and the heat transfer effect is influenced. In the embodiment of the invention, the four springs 20 are arranged at the four angular positions of the heat-conducting block 18, and the springs 20 are in a compressed state after assembly, so that the effective contact areas of the two contact surfaces can be well ensured only by ensuring the flatness and the roughness of the two contact surfaces of the heat-conducting block 18 and the refrigeration cavity 8, the flexible connection structure can reduce the processing requirements, and the influence of the mechanical processing error on heat conduction can be weakened.

And heat-conducting silicone grease is arranged between the refrigerating sheet 16 and the heat-conducting block 18 and between the refrigerating sheet 16 and the radiating fin 15, so that the heat-conducting efficiency can be improved.

As shown in fig. 5 and 6, each of the a valve 1 and the B valve 2 includes a pump 27, a syringe and a driving mechanism, the pump 27 includes a piston rod 30, an upper cover 31, a cavity 32, a glue inlet nozzle 33, a valve body 34 and a valve core 35, the glue inlet nozzle 33 is disposed on the valve body 34 and connected to the syringe, the valve core 35 is rotatably connected to the valve body 34 to control the opening and closing of the valve body 34, the lower end of the cavity 32 is connected to the valve body 34, the cavity 32 is used for storing glue, the upper cover 31 is sleeved on the cavity 32, the piston rod 30 is slidably connected to the cavity 32 and connected to an output end of the driving mechanism, when the valve body 34 is opened, the driving mechanism drives the piston rod 30 to move downward to discharge the glue in the cavity 32, when the valve body 34 is closed, the cavity 32 is communicated with the glue inlet nozzle 33, the driving mechanism drives the piston rod 30 to move upward, the glue is pumped into the cavity 32 from the needle cylinder and can realize continuous glue dispensing operation under repeated work, a specially-made micro-pumping structure is adopted, the influence of the temperature and viscosity change of the external glue is avoided, the glue dispensing operation from low viscosity to high viscosity can be realized, the plunger type metering valve is simple in structure, and different mixing ratios can be quickly switched by replacing a valve body 34.

The side of the mounting plate 3, which faces away from the pump 27, is provided with a rotary cylinder 28 for driving the valve element 35 to rotate, the rotary cylinder 28 drives the valve element 35 to make a reciprocating 90-degree rotary motion in the valve body 34, the valve element 35 and the valve body 34 are in clearance seal, the valve element 35 is made of hard alloy, the wear resistance is excellent, and the valve element 35 rotates to a specified angle position to open the valve body 34 and close the valve body 34.

The driving mechanism comprises a motor 22, a ball screw 24 and a screw nut 23, the screw nut 23 converts the rotary motion of the motor 22 into the linear motion of the ball screw 24, a piston rod positioning seat 25 is arranged at the lower end of the ball screw 24, and a wedge-shaped structure pressing block 26 used for locking the piston rod 30 on the piston rod positioning seat 25 is arranged on the piston rod positioning seat 25. The rotary motion of the motor 22 is converted into the linear motion of the ball screw 24 through the screw nut 23, so that the piston rod 30 is driven to reciprocate up and down, the high-precision positioning of the piston rod 30 is realized, and the high-precision dispensing requirement is met. The two plunger type metering valves are respectively controlled by the two motors 22, so that the mixing ratio error caused by different viscosities of the two-component glue is solved, and the different rotating speeds of the motors 22 can be controlled for compensation. The mixing ratio and the glue discharging amount are controlled by setting the rotating speed ratio and the rotating speed of the motor 22 of the valve A1 and the valve B2, so that the debugging is very intuitive, and the operation is simple and reliable.

The mounting plate 3 is provided with an input/output interface 21 for providing an air source for the rotary cylinder 28, providing a pulse signal for the motor 22, and feeding back position signals of the motor 22 and the rotary cylinder 28 to an external controller.

The mounting plate 3 is provided with a guide rail along the vertical direction, the piston rod positioning seat 25 is provided with two sliding blocks connected to the guide rail in a sliding manner, and the piston rod positioning seat 25 realizes high-rigidity positioning and guiding through the double sliding blocks.

Combine fig. 2 and fig. 3, valve body 34 lower extreme is equipped with nut 4 and connects 5, connect 5 to pass through nut 4 with valve body 34 is connected, the hybrid chamber includes hybrid chamber 6 and lower hybrid chamber 7, connect 5 through interference fit install in last hybrid chamber 6, lower hybrid chamber 7 with refrigeration chamber 8 passes through screw 9 and connects, refrigeration chamber 8 lower extreme is equipped with syringe needle nut 10, syringe needle nut 10 will syringe needle 11 with mixing tube 12 lower extreme compresses tightly sealedly, and the hybrid chamber installation is simple, and nut 4 outer cylindrical surface is provided with the annular knurl, need not to dismantle fast with the help of the instrument, under the normal use condition, exempt from to dismantle, exempt from the washing, only need regularly change disposable mixing tube 12 can, save the debugging time greatly, reduced operating personnel's intensity of labour to production efficiency has been promoted.

The working principle is as follows: two components of glue are respectively arranged in glue cylinders of a valve A and a valve B, two plunger type metering valves simultaneously discharge glue, when a valve body 34 is opened, a driving mechanism drives a piston rod 30 to move downwards to discharge the glue in a cavity 32, when the valve body 34 is closed, the cavity 32 is communicated with a glue inlet nozzle 33, the driving mechanism drives the piston rod 30 to move upwards to pump the glue into the cavity 32 from the glue cylinder, and continuous glue dispensing operation can be realized under the repeated work; the glue enters the mixing tube 12 through the mixing cavity to be mixed and then is discharged from the needle 11, the whole mixing tube 12 is contained by the refrigerating cavity 8, the refrigerating effect is good, and the curing time after the glue is mixed can be effectively prolonged; the glue of two kinds of components is measured separately through A valve 1 and B valve 2, can realize the mixing ratio of high accuracy, and the piston rod 30 sectional area of valve A and valve B can be customized according to specific proportion, specifically by: the dispensing amount is equal to the sectional area of the piston rod 30 multiplied by the piston displacement, so that a mixing ratio of any proportion can be obtained by customizing the piston rod 30 and the corresponding piston cavity, and because the two motors 22 respectively work, when the mixing ratio is required to be high, errors caused by manufacturing and assembling of different valves can be compensated by changing the rotating speed of the motor 22.

Finally, it should be noted that in the description of the present invention, it is to be understood that the terms "central", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

Moreover, relational terms such as "first," "second," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or without necessarily requiring or implying any relative importance or implying any particular order among or between such entities or actions. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly, as they may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically or in communication with each other; either directly or indirectly through intervening media, or may be in a communicating relationship between the two elements unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various embodiments. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, embodiment aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. It should be noted that the specific features, structures, materials or characteristics described in the embodiments and examples of the present application may be combined with each other without conflict or contradiction. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the invention can be utilized independently or in combination with one or more other aspects and/or embodiments thereof by one of ordinary skill in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (10)

1. a two-component glue precision dispensing mechanism, is characterized in that, Including mounting plate, A valve, B valve, mixing chamber, mixing tube, refrigeration chamber and needle; The A valve and the B valve are arranged on the mounting plate, the mixing chamber is arranged at one end of the A valve and the B valve where the glue is discharged, and the refrigeration chamber is arranged at the mixing chamber facing away from the A valve and the On one side of the B valve, the mixing pipe is arranged in the refrigeration chamber and connected to the mixing chamber for mixing the glue discharged from the A valve and the B valve, and the refrigeration chamber connects the mixing pipe The needle is pressed and fixed on the mixing chamber, and the needle is arranged on the side of the refrigeration chamber facing away from the mixing chamber. 2. two-component glue precision dispensing mechanism according to claim 1, is characterized in that, The installation plate is provided with a refrigeration component for cooling the refrigeration cavity, the refrigeration component includes a connecting plate, a refrigeration fin, a heat conduction block, a cooling fin, a fan and a heat insulation cover, and the connecting plate is arranged on the installation The cooling fin is arranged on the side of the connecting plate close to the refrigeration cavity, the fan is arranged on the side of the connecting plate far from the refrigeration cavity, and the cold side of the refrigeration fin is connected to the heat conduction block. contact, the hot surface of the cooling sheet is in contact with the heat sink, the heat conducting block is in contact with the cooling cavity, and the heat insulating cover is arranged on the cooling sheet and the heat conducting block. 3. The two-component glue precise dispensing mechanism according to claim 2, characterized in that, The connecting plate is provided with a plurality of guide posts and springs, the springs are sleeved on the guide posts, the guide posts are matched with the heat-conducting blocks, and under the compression of the springs, the heat-conducting blocks and the heat-conducting blocks The refrigeration cavity is fitted. 4. The two-component glue precise dispensing mechanism according to claim 2, characterized in that, Thermally conductive silicone grease is arranged between the cooling sheet and the heat conducting block, and between the cooling sheet and the heat sink. 5. two-component glue precision dispensing mechanism according to claim 1, is characterized in that, The A valve and the B valve both include a pump, a syringe and a drive mechanism. The pump includes a piston rod, an upper cover, a cavity, a glue inlet, a valve body and a valve core. The glue inlet is located at the The valve body is connected to the needle cylinder, the valve core is rotatably connected to the valve body to control the opening and closing of the valve body, and the lower end of the cavity is connected to the valve body. For storing glue, the upper cover is sleeved on the cavity, the piston rod is slidably connected in the cavity, and is connected with the output end of the driving mechanism. When the valve body is opened, the driving mechanism The piston rod is driven to move downward to spit out the glue inside the cavity. When the valve body is closed, the cavity is communicated with the glue inlet, and the driving mechanism drives the piston rod to move upward to pump the glue from the syringe to the cavity. in the body. 6. The two-component glue precise dispensing mechanism according to claim 5, characterized in that, The side of the mounting plate facing away from the pump is provided with a rotary cylinder that drives the valve core to rotate. 7. The two-component glue precise dispensing mechanism according to claim 1, characterized in that, The drive mechanism includes a motor, a ball screw and a screw nut. The screw nut converts the rotary motion of the motor into a linear motion of the ball screw. The lower end of the ball screw is provided with a piston rod positioning seat, so The piston rod positioning seat is provided with a wedge-shaped structure pressing block for locking the piston rod on the piston rod positioning seat. 8. The two-component glue precise dispensing mechanism according to claim 1, characterized in that, The mounting plate is provided with a vertical guide rail, and the piston rod positioning seat is provided with two sliding blocks slidably connected to the guide rail. 9 . The two-component glue precise dispensing mechanism according to claim 5 , wherein the lower end of the valve body is provided with a nut and a joint, the joint is connected to the valve body through the nut, and the mixing The cavity includes an upper mixing cavity and a lower mixing cavity, the joint is installed in the upper mixing cavity through interference fit, the lower mixing cavity and the refrigeration cavity are connected by screws, and the lower end of the refrigeration cavity is provided with a needle nut, The needle nut presses and seals the needle and the lower end of the mixing tube. 10. The two-component glue precise dispensing mechanism according to claim 1, characterized in that, The A valve and the B valve are both plunger type metering valves and are symmetrically arranged on the mounting plate.

Images