CN110743754B - Glue dispensing device - Google Patents
Glue dispensing device Download PDFInfo
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- CN110743754B CN110743754B CN201911073394.2A CN201911073394A CN110743754B CN 110743754 B CN110743754 B CN 110743754B CN 201911073394 A CN201911073394 A CN 201911073394A CN 110743754 B CN110743754 B CN 110743754B
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- nozzle
- box body
- glue
- glue solution
- piston box
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
Abstract
The application discloses a glue dispensing device, which comprises a valve body external mechanism, a connecting mechanism, an electromagnetic valve and a valve body internal mechanism; the firing pin impacts high-viscosity glue liquid in a reciprocating manner under the motion control of the electromagnetic valve and the restoring force of the elastic piece to be ejected out of the nozzle; the diameter of the firing pin is a tapered diameter and becomes narrower from the direction away from the nozzle to the direction close to the nozzle. Therefore, more glue solution can be filled around the striker in the glue solution space, the generated pressure is higher, the normal glue dispensing effect is achieved, the blockage is not easy, the glue solution is not easy to stick in the glue dispensing valve, and the damage rate of the glue dispensing device is reduced.
Description
Technical Field
The invention relates to the technical field of non-contact dispensing valves, in particular to a dispensing device.
Background
In the packaging process of the electronic industry, the application of glue dispensing valve to glue assembly is quite common. The traditional glue dispensing valve inputs glue solution, and drives the firing pin to move through the electromagnetic valve, so that the glue solution is impacted by the firing pin and is discharged, and the purpose of dispensing is achieved. Along with the improvement of the automation degree of the dispensing field, the demand for dispensing is also increasing. The high-viscosity glue solution generally refers to ultraviolet UV curing glue, epoxy resin glue, anaerobic glue, conductive silver glue, heat-conducting grease, tin paste, soldering flux, silica gel and hot-melt structural glue. For the type of high-viscosity glue solution (such as solder paste), the normal dispensing effect cannot be achieved, the blockage is easy, the glue solution sticks to the dispensing valve, and the equipment is easy to damage.
Content of application
In view of this, the present invention aims to provide a dispensing device to solve the technical problems of the existing dispensing valve that the device is easy to be damaged due to easy blockage and the glue solution sticking in the dispensing valve.
The technical scheme adopted by the invention for solving the technical problems is as follows:
according to an aspect of the present invention, there is provided a dispensing apparatus for dispensing a high viscosity glue solution, comprising:
the valve body external mechanism, the connecting mechanism, the electromagnetic valve and the valve body internal mechanism;
the valve body internal mechanism is fixed in the valve body external mechanism and is connected with the electromagnetic valve through a connecting mechanism;
the valve body internal mechanism comprises an elastic piece abutting joint head, an elastic piece sleeved on the elastic piece abutting joint head, a firing pin fixed with the bottom of the elastic piece abutting joint head, a glue solution space and a nozzle positioned at the bottom of the glue solution space, wherein the firing pin reciprocally impacts high-viscosity glue solution in the glue solution space under the motion control of an electromagnetic valve and the restoring force of the elastic piece and ejects the high-viscosity glue solution from the nozzle;
the diameter of the firing pin is a graded diameter and becomes narrower from the direction far away from the nozzle to the direction close to the nozzle.
Further, the firing pin comprises at least one reducing part, and the reducing part is provided with a chamfer.
Further, the narrowest section of the striker after diameter change is closest to the nozzle hole of the nozzle, and the narrowest section of the striker has a preset length and is cylindrical.
Further, the bottom of the glue solution space is surrounded by the side wall of the nozzle; the glue solution space at the nozzle comprises three intervals and the nozzle hole, wherein the volumes of the three intervals are gradually reduced from top to bottom; the fourth interval > the third interval > the second interval by volume comparison.
Further:
the fourth interval is a cylindrical interval, and the side wall of the fourth interval is a cylindrical side wall;
the third section is a first conical section, and the side wall of the third section is a first conical wall;
the second section is a second conical section, and the side wall of the second section is a second conical wall;
the second area is downwards connected with the nozzle hole, and the side wall of the nozzle hole is a nozzle hole wall;
the wall of the nozzle hole extends upwards to form a second conical wall, the second conical wall extends upwards to form a first conical wall, and the first conical wall extends upwards to form a cylindrical side wall;
on a section plane of the third interval, which is longitudinally cut along the axis of the firing pin, the included angle between the first conical walls on the two sides is approximately a right angle.
Furthermore, the internal mechanism of the valve body also comprises a sealing ring, a first oilless bushing and a second oilless bushing;
the sealing ring, the first oilless bushing and the second oilless bushing are sleeved on the outer wall of the firing pin and abut against the inner wall of the glue solution space to realize sealing.
Further, the valve body external mechanism comprises a micrometer, a micrometer mounting seat, a dry bushing, a piston box body, an extension block and a fixing ring;
the piston box body is in a cuboid shape, a micrometer mounting seat is fixed on the upper surface of the piston box body, the micrometer is arranged on the micrometer mounting seat, the dry type bushing for protecting the micrometer is arranged at the abutting position of the micrometer and the micrometer mounting seat, an extension block is fixed on the lower surface of the piston box body, and the fixing ring is fixed on the lower surface of the extension block;
the piston box body, the extension block and the fixing ring are coaxial, the glue solution space is formed by the piston box body, the extension block and the fixing ring along the axis, and the nozzle is located at the bottom of the fixing ring.
Furthermore, the connecting mechanism comprises a rubber clamp, a supporting rod, a limiting block, a connecting block, a valve body connecting block and an electromagnetic valve mounting plate;
the electromagnetic valve mounting plate is fixed on the first side face of the piston box body and fixes the electromagnetic valve;
the opposite side of the first side face of the piston box body is a third side face, and the third side face of the piston box body is connected with the valve body connecting block so as to fix the valve body internal mechanism on the valve body external mechanism;
the second side of the piston box body is fixed with the connecting block, the supporting rod is arranged on the connecting block to support and fix the rubber clamp on the upper portion of the supporting rod, and the connecting block is fixed with a limiting block 23 on the side face in the same direction of the second side and at the projection position of the rubber clamp so as to jointly fix the external dispensing needle cylinder.
Furthermore, the electromagnetic valve mounting plate comprises a first electromagnetic valve mounting plate and a second electromagnetic valve mounting plate, the first electromagnetic valve mounting plate is connected with the first side surface of the piston box body, and the second electromagnetic valve mounting plate and one side of the first electromagnetic valve mounting plate, which is back to the first side surface, are fixed;
a glue inlet pipe joint is arranged on the extension block, and an air inlet pipe joint and an air outlet pipe joint are arranged on the first electromagnetic valve mounting plate;
the piston box body is in threaded connection with the micrometer mounting seat; a chamfer is arranged at the position where the elastic piece abuts against the bottom of the head and the firing pin is fixed; one side of the piston box body facing the second side face is provided with a circular air inlet to facilitate air inlet, and a clamping groove position is arranged to facilitate installation of the extension block; and glue overflow blind holes are formed outside the inner wall of the accommodating space of the piston box body.
Further, the device also comprises a heating device which is arranged outside the fixing ring and used for heating the high-viscosity glue solution to enhance the flowability.
According to the dispensing device, the striker impacts the high-viscosity glue solution in a reciprocating manner under the motion control of the electromagnetic valve and the restoring force of the elastic piece to be ejected out of the nozzle; the diameter of the firing pin is a graded diameter and becomes narrower from the direction far away from the nozzle to the direction close to the nozzle. Therefore, the periphery of the firing pin in the glue solution space can be filled with more glue solution to generate higher pressure so as to achieve the normal glue dispensing effect, the glue solution is not easy to block, the glue solution is not easy to stick in the glue dispensing valve, and the damage rate of the glue dispensing device is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1a, 1b, 1c, and 1d are perspective views, front views, side views, and top views of a structure schematic diagram of a dispensing apparatus according to an embodiment of the present disclosure;
fig. 2a is a schematic partial structure view of a dispensing device according to an embodiment of the present disclosure, and fig. 2b is a cross-sectional view taken along a direction a-a in fig. 2 a;
fig. 3 is an exploded schematic view of a dispensing device according to an embodiment of the present disclosure;
fig. 4 is a hardware schematic view of a dispensing apparatus according to an embodiment of the present disclosure;
fig. 5a, 5b, 6a, and 6b are partial structures of a dispensing device according to an embodiment of the present disclosure;
fig. 7 is a schematic illustration of a dispensing apparatus according to an embodiment of the present disclosure;
fig. 8a and 8b are schematic cross-sectional views of a partial structure of a dispensing device according to an embodiment of the present application;
fig. 9 is a test diagram of a dispensing apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all 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 application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, the descriptions referred to as "first", "second", etc. in this application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
As shown in fig. 1-3, the present application provides a dispensing device 100 for dispensing a high viscosity glue solution, which includes a valve body external mechanism 10, a connecting mechanism 20, an electromagnetic valve 50, and a valve body internal mechanism 40;
the valve body internal mechanism 40 is fixed in the valve body external mechanism 10, and the valve body internal mechanism 40 is connected with the electromagnetic valve 50 through a connecting mechanism 20;
as shown in fig. 2b, the valve body internal mechanism 40 includes an elastic member abutting head 44, an elastic member 41 sleeved on the elastic member abutting head 44, a striker 45 fixed to the bottom of the elastic member abutting head 44, a glue space 49, and a nozzle 47 located at the bottom of the glue space 49, where the striker 45 reciprocally impacts the high-viscosity glue in the glue space 49 and ejects the high-viscosity glue from the nozzle under the motion control of an electromagnetic valve 50 and the restoring force of the elastic member 41; in particular, the elastic member 41 may be provided as a spring or other elastic structure. The resilient member abutment head 44 is shaped like an inverted mushroom.
The diameter of the striker 45 is a tapered diameter and becomes narrower as it goes from a direction away from the nozzle 47 to a direction approaching the nozzle 47.
In the dispensing device 100 according to the embodiment of the present application, the striker 45 reciprocally impacts the high viscosity glue solution under the motion control of the electromagnetic valve 50 and the restoring force of the elastic member 41 to eject the high viscosity glue solution from the nozzle 47; the diameter of the striker 45 is a tapered diameter and becomes narrower as it goes from the nozzle away direction to the nozzle closer direction. Therefore, more solder paste can be filled around the striker 45 in the glue solution space 49, the generated pressure is higher, the normal glue dispensing effect is achieved, the blockage is not easy, the glue solution is not easy to stick in the glue dispensing valve, and the damage rate of the glue dispensing device is reduced.
Fig. 4 is a schematic view of a striker according to an embodiment of the present application. Further, as shown in fig. 4, the striker 45 includes at least one reducing portion 451, and the reducing portion 451 is provided with a chamfer, or the reducing portion 451 is in a truncated cone shape. Specifically, as shown in fig. 8a, the striker 45 includes two reducing locations 451, specifically a first reducing location 45111 and a second reducing location 4513.
Further, the narrowest section 452 of the reducing striker 45 is closest to the nozzle hole 4710 of the nozzle 47, and the narrowest section 452 of the striker has a predetermined length and is cylindrical, for example, the predetermined length is 1 mm; the narrowest section 452 is of a cylindrical shape and therefore has a constant diameter.
Specifically, fig. 5 and 6 show the relationship between the striker and the nozzle in both the on-off states of the solenoid valve. FIG. 5a is a view showing the positional relationship between the striker and the nozzle with the solenoid valve in communication, and FIG. 5b is a view showing the positional relationship between the lower portion of the striker and the nozzle in FIG. 5 a; fig. 6a is a view showing a positional relationship between the striker and the nozzle when the solenoid valve is off, and fig. 6b is a view showing a positional relationship between the lower portion of the striker and the nozzle in fig. 6 a. When the firing pin 45 moves upwards, the glue solution enters into a gap between the nozzle and the firing pin, when the firing pin moves downwards, most of the glue solution is extruded and reflows, and a small part of the glue solution is ejected from the nozzle by high-speed impact, so that the effect of collision ejection is achieved.
For the high-viscosity glue solution, the viscosity of the glue solution is reduced by changing the temperature, and the glue solution can also move through high-pressure extrusion and a reasonable flow path. The frequency of clogging can be reduced by changing the temperature, and a heating device (not shown) can be added outside the fixing ring 15 to increase the temperature, so that the flowing performance is better.
Another way is by analysis with a combination of graphs. The inventors of the present application conducted the following tests in developing the striker and nozzle structure of the embodiment of the present application. Fig. 7 is a graph showing a variation of a single variable between the striker and the nozzle. The variable of A and B in the figure is the diameter of the contact end of the firing pin, the diameter of the end of the firing pin A is 2.4mm, the diameter of the end of the firing pin B is 1.5mm, and according to the physics F which is PS, when the pressure is constant, the smaller the stress area is, and the more obvious the pressure effect is. The variable of B and C in the figure is the inclination angle of the inner chamfer of the nozzle, the inclination of C is larger, the distance between the impact contact surface and the nozzle opening is farther, and the impact damage degree is reduced. The variable of C and D in the figure is the diameter of the nozzle opening, the diameter of the nozzle opening of C is 0.1mm, the diameter of the nozzle opening of D is 0.2mm, and the larger the caliber of the nozzle is, the better the flow performance of the glue solution is. The positions of the nozzle and the firing pin are provided with certain protection bosses, particularly bosses formed on the side walls of three sections at the bottom of the glue solution space 49, so that the problem of damage to the spray opening possibly caused by non-contact spraying is avoided. The effect comparison research adopts the principle of controlling single variable, and ensures the high-pressure spraying effect by changing the diameter of the contact end of the firing pin and the nozzle mechanism in design and use.
For dispensing the high viscosity glue, a solder paste is used as an example for illustration. Solder paste is a thixotropic fluid that flows under an external force. The main factor influencing the viscosity of the solder paste is the percentage content of the solder powder, and the higher the alloy content is, the higher the corresponding viscosity is. In the example application, No. 5 powdered tin paste and No. 6 powdered tin paste are used, the particle powder diameter of the No. 5 powdered tin paste is 15-25um, the particle powder diameter of the No. 6 powdered tin paste is 5-15um, and the viscosity value of the tin paste is between 180 and 220 Pa.s.
Fig. 8a and 8b are longitudinal cross-sectional views of the lower portion of the striker and the nozzle along the striker axis. The above principle is combined with the description of fig. 8 a. The design requires that the diameter of the firing pin is changed into a gradual change type, so that the first reducing part 4511 and the second reducing part 4513 are chamfered in two stages, and the purpose is to fill more solder paste on the periphery and generate more pressure. The portion of the narrowest section 452 of the striker 45 is 1mm in height and has a constant diameter. The narrowest section 452 is not designed to be chamfered or rounded. The fillet and chamfer increase the contact surface, and a tin block is easily formed when tin dispensing is performed.
Specifically, the bottom of the glue solution space 49 is surrounded by the side wall of the nozzle 47. The glue solution space 49 of the nozzle 47 comprises three intervals of which the volume gradually decreases from top to bottom, and the fourth interval is larger than the third interval and larger than the second interval by volume comparison. As shown in fig. 8b, fourth section 4740 is a cylindrical section with a side wall that is cylindrical side wall 474; third section 4730 is a first conical section with a sidewall that is a first tapered wall 473; second section 4720 is a second conical section with a second conical wall 472 on its side wall; the second section 4720 is connected downward to a nozzle hole 4710, and the side wall of the nozzle hole 4710 is a nozzle hole wall 473. Alternatively, the nozzle bore wall 473 extends upwardly from the second tapered wall 472, the second tapered wall 472 extends upwardly from the first tapered wall 473, and the first tapered wall 473 extends upwardly from the cylindrical sidewall 474. The angle between the first tapered walls 473 on both sides of the first conical section 4730 on the cross-sectional plane (the plane is the two legs of the triangle) cut longitudinally along the axis of the striker 45 is substantially a right angle (the cross-sectional plane is a right isosceles triangle), i.e., the angle B1 in fig. 8B is designed to be 90 degrees, it being understood that normal tolerances are allowed, and substantially a right angle.
The diameter A3 of the narrowest section 452 of the striker 45 is designed to be 0.4mm to 1mm larger than the value of the widest section B3 (diameter of the bottom of the cone) of the third section 4730, and thus the design can reduce the damage caused by the impact on the nozzle opening. For nozzle 47, the diameter B2 of nozzle aperture 4710 is the designed nozzle aperture, the widest point B3 of third segment 4730 is equal to (B2+0.2-1mm, e.g., B2+0.3mm, B2+0.4mm, B2+0.5mm, B2+0.6mm, B2+0.7mm, B2+0.8mm, B2+0.9 mm. the height B4 of nozzle aperture 4710 of nozzle 47 is between 1/12-1/8 of the total height of nozzle 47, e.g., 1/11, 1/10 or 1/9; the height B5 of fourth segment 4740 is between 2/7-1/2 of the total height of nozzle 47, e.g., 3/7,2/5, 3/5 or 4/7. such design values are better for the flowability of the solder paste, in such design values, tin paste can be spotted, in particular applications, 0.1mm, 0.15mm, 0.25mm, the nozzle effect data can be collected at the spot size of the instrument, the results of the acquisition are shown in FIG. 9.
As can be seen from fig. 9, under the above design conditions, the function of dispensing the glue can be the same as that of dispensing the common glue (not high viscosity), so as to realize dispensing at fixed points and dispensing with wires.
For glue solutions with different high viscosities, such as ultraviolet UV curing glue, epoxy resin glue, anaerobic glue, conductive silver glue, heat-conducting grease, soldering flux, silica gel, and hot-melt structural glue, the design principles are the same, and the specific values may vary somewhat.
Based on the structure of the striker 45 and the nozzle 47, other structures of the dispensing device 100 will be described.
Further, the valve body internal mechanism 40 further includes a seal ring 46 and an oilless bushing 42. The oilless liner 42 includes a first oilless liner 421 and a second oilless liner 422;
the sealing ring 46, the first oilless bushing 421 and the second oilless bushing 422 are disposed on the outer wall of the striker 45 and abut against the inner wall of the glue solution space 49 to achieve sealing.
In some embodiments, the valve body external mechanism 10 includes a micrometer 11, a micrometer mounting seat 12, a dry bushing 16, a piston box body 13, an extension block 14 and a fixing ring 15;
the piston case 13 is a rectangular parallelepiped shape having six surfaces, an upper surface, a lower surface, and four side surfaces. The four side surfaces are respectively a first side surface, a third side surface opposite to the first side surface, a second side surface adjacent to the first side surface and a fourth side surface. A micrometer mounting seat 12 is fixed on the upper surface of the piston box body 13, the micrometer is arranged on the micrometer mounting seat 12, a dry bushing 16 for protecting the micrometer 11 is arranged at the abutting position of the micrometer 11 and the micrometer mounting seat 12, an extension block 14 is fixed on the lower surface of the piston box body 13, and a fixing ring 15 is fixed on the lower surface of the extension block 14;
the piston box body 13, the extension block 14 and the fixing ring 15 are coaxial, and the glue solution space 49 is a space formed by the piston box body 13, the extension block 14 and the fixing ring 15 along the axis. The nozzle 45 is located at the bottom of the retainer ring 15. And the narrowest section 452 of the nozzle 47 is also located in the glue space 49 in said fixed ring 15.
In some embodiments, the connecting mechanism 20 includes a rubber clamp 21, a support rod 22, a limit block 23, a connecting block 24, a valve body connecting block 25 and a solenoid valve mounting plate 27;
the electromagnetic valve mounting plate 27 is fixed on the first side surface of the piston box body 13, and the electromagnetic valve 50 is fixed by the electromagnetic valve mounting plate 27;
the opposite side of the first side of the piston box body 13 is a third side, and the third side of the piston box body is connected with the valve body connecting block 25. The valve body external mechanism 10 refers to each part of the valve body, a clearance position is reserved inside each part of the valve body and used for installing the valve body internal mechanism 40, the dispensing device 100 needs to be additionally installed on an external transplanting mechanism to act, and the valve body connecting block 25 plays a role in additional connection.
The second side surface of the piston box body 13 is fixed with the connecting block 24, the supporting rod 22 is arranged on the connecting block 24 so as to support and fix the rubber clamp 21 on the upper part of the supporting rod 22, and the connecting block 24 and the second side surface are arranged on the same direction side surface and a limit block 23 is fixed at the projection position of the rubber clamp 21 so as to jointly fix the external dispensing needle cylinder.
Further, the solenoid valve mounting plate 27 includes a first solenoid valve mounting plate 271 and a second solenoid valve mounting plate 272, the first solenoid valve mounting plate 271 is connected to the first side surface of the piston box 13, and the second solenoid valve mounting plate 272 is fixed to a side of the first solenoid valve mounting plate 271, which faces away from the first side surface;
a glue inlet connector 31 is arranged on the extension block 14, and the glue inlet connector 31 is communicated with an external glue dispensing syringe by using a catheter. An air inlet pipe joint 32 and an air outlet pipe joint 33 are arranged on the first electromagnetic valve mounting plate 271; the air inlet pipe joint 32 and the air outlet pipe joint 33 are connected with an air pump of a pneumatic solenoid valve.
Fig. 4 is a longitudinal sectional view of the piston case. The piston box body 13 is in threaded connection with the micrometer mounting base 12, and a threaded connection part 121 is schematically shown in fig. 4; the connection of structure has adopted the screw hole cooperation to and the draw-in groove that corresponds is connected, makes the installation more humanized. A chamfer 441 is arranged at the position where the elastic piece abuts against the bottom of the head 44 and the striker 45 is fixed; a circular air inlet 131 is formed in one side, facing the second side face, of the piston box body 13 to facilitate air inlet, the circulation range is expanded, a circular groove is formed by connecting an air inlet part, the acting area is increased, and the impact force is increased; a clamping groove position 132 is arranged on one side, facing the second side face, of the piston box body 13 so as to facilitate installation of the extension block 14, facilitate installation of the extension block 14 and ensure tight combination; and an overflow glue blind hole 133 is formed outside the inner wall of the accommodating space 49 of the piston box body 13.
Further, the dispensing device 100 further includes a heating device disposed outside the fixing ring for heating the high viscosity glue solution to enhance the fluidity.
The working principle of the glue dispensing device 100 is that glue enters the glue space 49, the electromagnetic valve 50 is controlled to be communicated, the electromagnetic valve 50 controls the on-off of air inlet at the position of the air inlet 131, the striker 45 moves upwards due to air inlet, and the glue flows into the nozzle 47; the solenoid valve 50 is controlled to open, and in combination with the action of the return spring, the striker 45 is caused to move downwards, to strike the glue, and to be ejected from the nozzle. The dispensing effect is achieved by repeating the action.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the subject matter of the present application, which is intended to be covered by the claims and their equivalents, or which are directly or indirectly applicable to other related arts are intended to be included within the scope of the present application.
Claims (9)
1. Adhesive deposite device for high viscosity glue solution point is glued, its characterized in that includes:
the valve body external mechanism, the connecting mechanism, the electromagnetic valve and the valve body internal mechanism;
the valve body internal mechanism is fixed in the valve body external mechanism and is connected with the electromagnetic valve through a connecting mechanism;
the valve body internal mechanism comprises an elastic piece abutting joint head, an elastic piece sleeved on the elastic piece abutting joint head, a firing pin fixed with the bottom of the elastic piece abutting joint head, a glue solution space and a nozzle positioned at the bottom of the glue solution space, wherein the firing pin reciprocally impacts high-viscosity glue solution in the glue solution space under the motion control of an electromagnetic valve and the restoring force of the elastic piece and ejects the high-viscosity glue solution from the nozzle;
the diameter of the firing pin is a graded diameter, and the firing pin is narrower from the direction far away from the nozzle to the direction close to the nozzle;
the firing pin comprises at least one reducing part;
the narrowest section of the firing pin after diameter change is closest to the nozzle hole of the nozzle;
the bottom of the glue solution space is surrounded by the side wall of the nozzle; the glue solution space at the nozzle comprises three intervals and the nozzle hole, wherein the volumes of the three intervals are gradually reduced from top to bottom; the three intervals are a fourth interval, a third interval and a second interval from top to bottom in sequence;
the fourth interval is a cylindrical interval, and the side wall of the fourth interval is a cylindrical side wall;
the third section is a first conical section, and the side wall of the third section is a first conical wall;
the second section is a second conical section, and the side wall of the second section is a second conical wall;
the second area is downwards connected with the nozzle hole, and the side wall of the nozzle hole is a nozzle hole wall;
the wall of the nozzle hole extends upwards to form a second conical wall, the second conical wall extends upwards to form a first conical wall, and the first conical wall extends upwards to form a cylindrical side wall;
on a section plane of the third interval, which is longitudinally cut along the axis of the firing pin, the included angle between the first conical walls on the two sides is approximately a right angle;
the value of the widest part of the third interval is equal to the diameter of the nozzle hole plus 0.2-1 mm; the height of a nozzle hole of the nozzle is 1/12-1/8 of the total height of the nozzle, and the height of the fourth interval is 2/7-1/2 of the total height of the nozzle.
2. The dispensing apparatus of claim 1, wherein the reducing portion is chamfered.
3. The dispensing apparatus of claim 1, wherein the narrowest section of the plunger has a predetermined length and is cylindrical.
4. The dispensing apparatus of claim 1, wherein the volume of the fourth interval > the volume of the third interval > the volume of the second interval.
5. The dispensing apparatus of claim 4, wherein the valve body internal mechanism further comprises a seal ring, a first oilless bushing, and a second oilless bushing;
the sealing ring, the first oilless bushing and the second oilless bushing are sleeved on the outer wall of the firing pin and abut against the inner wall of the glue solution space to realize sealing.
6. The dispensing device according to any one of claims 1-5, wherein the valve body external mechanism comprises a micrometer, a micrometer mounting seat, a dry bushing, a piston box body, an extension block and a fixed ring;
the piston box body is in a cuboid shape, a micrometer mounting seat is fixed on the upper surface of the piston box body, the micrometer is arranged on the micrometer mounting seat, the dry type bushing for protecting the micrometer is arranged at the abutting position of the micrometer and the micrometer mounting seat, an extension block is fixed on the lower surface of the piston box body, and the fixing ring is fixed on the lower surface of the extension block;
the piston box body, the extension block and the fixing ring are coaxial, the glue solution space is formed by the piston box body, the extension block and the fixing ring along the axis, and the nozzle is located at the bottom of the fixing ring.
7. The dispensing device of claim 6, wherein the connecting mechanism comprises a rubber clamp, a support rod, a limiting block, a connecting block, a valve body connecting block and an electromagnetic valve mounting plate;
the electromagnetic valve mounting plate is fixed on the first side face of the piston box body and fixes the electromagnetic valve;
the opposite side of the first side face of the piston box body is a third side face, and the third side face of the piston box body is connected with the valve body connecting block so as to fix the valve body internal mechanism on the valve body external mechanism;
the second side of the piston box body is fixed with the connecting block, the supporting rod is arranged on the connecting block to support and fix the rubber clamp on the upper portion of the supporting rod, and the connecting block is fixed with a limiting block 23 on the side face in the same direction of the second side and at the projection position of the rubber clamp so as to jointly fix the external dispensing needle cylinder.
8. The dispensing device of claim 7, wherein the solenoid valve mounting plate comprises a first solenoid valve mounting plate and a second solenoid valve mounting plate, the first solenoid valve mounting plate is connected to the first side surface of the piston box body, and the second solenoid valve mounting plate is fixed to the side of the first solenoid valve mounting plate opposite to the first side surface;
a glue inlet pipe joint is arranged on the extension block, and an air inlet pipe joint and an air outlet pipe joint are arranged on the first electromagnetic valve mounting plate;
the piston box body is in threaded connection with the micrometer mounting seat; a chamfer is arranged at the position where the elastic piece abuts against the bottom of the head and the firing pin is fixed; one side of the piston box body facing the second side face is provided with a circular air inlet to facilitate air inlet, and a clamping groove position is arranged to facilitate installation of the extension block; and glue overflow blind holes are formed outside the inner wall of the accommodating space of the piston box body.
9. The dispensing apparatus of claim 7, further comprising a heating device disposed outside the retainer ring for heating the high viscosity glue to enhance fluidity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073394.2A CN110743754B (en) | 2019-11-06 | 2019-11-06 | Glue dispensing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911073394.2A CN110743754B (en) | 2019-11-06 | 2019-11-06 | Glue dispensing device |
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| CN110743754A CN110743754A (en) | 2020-02-04 |
| CN110743754B true CN110743754B (en) | 2021-07-02 |
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| CN110743754A (en) | 2020-02-04 |
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