Hot melting glue melting mechanism

Abstract

The utility model discloses a hot melting adhesive dispensing mechanism which comprises a movable plate connected between the upper ends of piston rods of jacking cylinders, a pressure plate body connected with the movable plate through at least two vertical connecting rods, and an adhesive dispensing valve communicated with the pressure plate body, a plurality of mounting holes are formed in the pressure plate body and located on the outer side of the glue outlet through hole, a heating rod is embedded in each mounting hole, a glue outlet of a glue dispensing valve communicated with the glue inlet is connected with a glue dispensing head, a driven gear is arranged below the glue dispensing head in a sleeving manner, and a driving gear meshed with the driven gear is in transmission connection with an output shaft of the motor. According to the hot melt glue supply device, solid hot melt glue can be quickly heated, the heated hot melt glue liquid is discharged outwards from the glue outlet through hole to realize continuous glue supply, and the glue dispensing direction can be quickly switched while the continuous glue supply and glue supply stopping of a glue dispensing head are switched, so that the continuity and the efficiency of glue dispensing are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot melt adhesive dispensing, and particularly relates to a hot melt dispensing mechanism. Background Art

[0002] Hot melt adhesive is a kind of plastic adhesive. The hot melt adhesive in a solid state at normal temperature can melt into a liquid with fluidity at a certain temperature and can be dispensed by using a hot melt dispensing mechanism after heating.

[0003] When the hot melt dispensing mechanism of the prior art supplies glue, it usually needs to supply glue after heating the hot melt adhesive, and it is impossible to heat the solid hot melt adhesive while supplying glue, which is likely to affect the continuous supply of hot melt adhesive. And it usually uses a glue supply pipe to transport the hot melt adhesive, but it is likely to be bent and deformed due to the too high temperature of the hot melt adhesive. Moreover, the rotatable hot melt adhesive dispensing device cannot quickly switch the dispensing direction during dispensing, which affects the continuity and efficiency of dispensing. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a hot melt dispensing mechanism, which can quickly heat the solid hot melt adhesive, discharge the heated hot melt adhesive liquid outwards from the glue outlet through hole to realize continuous glue supply, and at the same time of realizing the switching between continuous glue supply and stopping glue supply to the dispensing head, realize the quick switching of the dispensing direction, and improve the continuity and efficiency of dispensing.

[0005] To solve the above technical problem, the technical scheme adopted by the utility model is: a hot melt dispensing mechanism, comprising: a carrier plate for placing a hot melt adhesive cylinder, at least two lifting cylinders vertically installed on the upper surface of the carrier plate, a movable plate connected to the upper ends of the piston rods of the lifting cylinders, a pressing plate body connected to the movable plate through at least two vertical connecting rods, and a dispensing valve respectively provided with a glue inlet and a glue outlet. A sealing groove extending along the entire circumferential direction is provided on the side surface of the pressing plate body, and a sealing ring is embedded in the sealing groove and protrudes from the side surface of the pressing plate body. A glue outlet through hole penetrating up and down is provided in the center of the pressing plate body. The lower surface of the pressing plate body is used for squeezing contact with the upper surface of the hot melt adhesive body. A plurality of mounting holes are provided on the pressing plate body and outside the glue outlet through hole, and a heating rod is embedded in each mounting hole.

[0006] The glue outlet through hole of the pressing plate body is communicated with the glue inlet of the dispensing valve, and a dispensing head is connected to the glue outlet of the dispensing valve. The vertically extending dispensing head is rotatably installed on a substrate horizontally arranged below the dispensing valve through a bearing. A motor is installed on the upper surface of the substrate and on one side of the dispensing valve. A driven gear is sleeved outside the dispensing head and below the substrate, and a driving gear meshing with the driven gear is in transmission connection with the output shaft of the motor.

[0007] The further improved solutions in the above technical solutions are as follows:

[0008] 1. In the above solution, the motor is mounted on the upper surface of the substrate through a support seat. The lower end of the output shaft of the motor is connected to a rotating shaft through a coupling. The lower end of the rotating shaft passes through the substrate and is provided with the driving gear.

[0009] 2. In the above solution, an induction sheet that can rotate with the rotating shaft is mounted on the rotating shaft, and a sensor that cooperates with the induction sheet is mounted on the support seat.

[0010] 3. In the above solution, a first air pipe joint and a second air pipe joint that are communicated with the inside of the dispensing valve are provided at the upper end of the side wall of the dispensing valve.

[0011] 4. In the above solution, the upper surface of the pressing plate body has an upward convex portion, and a plurality of mounting holes that extend in the horizontal direction and are parallel to each other are provided on the side surface of the convex portion and on both sides of the glue outlet through hole.

[0012] 5. In the above solution, the mounting holes are through holes.

[0013] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0014] For the hot-melt glue dispensing mechanism of the present utility model, the lower surface of the pressing plate body is used for extrusion contact with the upper surface of the hot-melt glue. A plurality of mounting holes are provided on the pressing plate body and outside the glue outlet through hole. Each mounting hole is embedded and installed with a heating rod. The glue outlet through hole of the pressing plate body is communicated with the glue inlet of the dispensing valve. The glue outlet of the dispensing valve communicated with the glue inlet is connected with a dispensing head. The vertically extending dispensing head is rotatably mounted on a substrate horizontally arranged below the dispensing valve through a bearing. A motor is mounted on the upper surface of the substrate and on one side of the dispensing valve. A driven gear is sleeved outside the dispensing head and below the substrate. The driving gear meshing with the driven gear is in transmission connection with the output shaft of the motor. It can not only quickly heat the hot-melt glue in the initial solid state, and discharge the melted and fluid hot-melt glue liquid outwards from the glue outlet through hole to realize continuous glue supply, but also realize the quick switching of the dispensing direction through the cooperation of the driven gear and the driving gear on the dispensing head, improving the continuity and efficiency of dispensing. Description of the Drawings

[0015] Att Figure 1 is the overall structural schematic diagram of the hot-melt glue dispensing mechanism of the present utility model;

[0016] Att Figure 2 is the partial structural schematic diagram of the hot-melt glue dispensing mechanism of the present utility model Figure 1 ;

[0017] Attached Figure 3 is a schematic structural view of the pressure plate body of the hot melt adhesive mechanism of the present utility model;

[0018] Attached Figure 4 is a schematic view of the heating rod of the hot melt adhesive mechanism of the present utility model;

[0019] Attached Figure 5 is a schematic view of the partial structure of the hot melt adhesive mechanism of the present utility model Figure 3 ;

[0020] Attached Figure 6 is a schematic sectional view of the present utility model along A - A Figure 5 in the attachment;

[0021] Attached Figure 7 is an enlarged schematic view of part B in the attachment of the present utility model Figure 6 in the attachment;

[0022] Attached Figure 8 is a schematic view of the partial structure of the hot melt adhesive mechanism of the present utility model Figure 4 .

[0023] In the above drawings: 100, hot melt adhesive cylinder; 200, carrier plate; 300, lifting cylinder; 400, movable plate; 500, vertical connecting rod; 1, pressure plate body; 2, sealing groove; 3, sealing ring; 4, glue outlet through hole; 5, mounting hole; 6, heating rod; 7, cover plate; 71, through hole; 8, convex part; 91, air outlet hole; 92, sealing rod; 12, dispensing valve; 13, glue inlet; 141, first air pipe joint; 142, second air pipe joint; 15, dispensing head; 16, dispensing port; 17, bearing; 18, substrate; 191, driven gear; 192, driving gear; 20, motor; 21, support seat; 22, coupling; 23, rotating shaft; 241, induction sheet; 242, sensor; 25, mounting block; 251, mounting groove; 252, glue inlet hole; 26, rotary sealing ring. Detailed Embodiments

[0024] The present patent can be further clearly understood through the following specific embodiments given, but they do not limit the present patent.

[0025] Embodiment 1: A hot melting point glue mechanism, comprising: a carrier plate 200 for placing a hot melt glue cylinder 100, at least two lifting cylinders 300 vertically installed on the upper surface of the carrier plate 200, a movable plate 400 connected between the upper ends of the piston rods of the lifting cylinders 300, and a pressing plate body 1 connected to the movable plate 400 through at least two vertical connecting rods 500, and a dispensing valve 12 respectively provided with a glue inlet 13 and a glue outlet. A sealing groove 2 extending along the entire circumferential direction is provided on the side surface of the pressing plate body 1, and a sealing ring 3 is embedded in the sealing groove 2 and protrudes from the side surface of the pressing plate body 1. A glue outlet through hole 4 penetrating up and down is provided in the center of the pressing plate body 1. The lower surface of the pressing plate body 1 is used for extrusion contact with the upper surface of the hot melt glue. A plurality of mounting holes 5 are provided on the pressing plate body 1 and outside the glue outlet through hole 4, and a heating rod 6 is embedded in each mounting hole 5;

[0026] When glue supply is required, the pressing plate is preheated to about 100 °C by the heating rod first, and the pressing plate is installed in the incoming material glue bucket of the hot melt glue, and the sealing ring on the pressing plate is in extrusion contact with the inner wall of the hot melt glue cylinder to achieve sealing between the two;

[0027] In the initial state, the glue in the hot melt glue cylinder is in a solid state;

[0028] The temperature of the pressing plate is heated to 150 - 160 °C by the heat generated by the heating rod. The specific heating temperature can be set, and the maximum can be heated to 250 °C. The high-temperature pressing plate contacts the solid hot melt glue, and the glue is in a molten and flowable liquid state after being heated at 150 °C for half an hour. A certain pressure is always maintained between the pressing plate and the glue liquid level. When liquid glue overflows from the air outlet hole, a sealing rod is installed in the air outlet hole to seal the air outlet hole;

[0029] The glue outlet through hole 4 of the pressing plate body 1 is communicated with the glue inlet 13 of the dispensing valve 12. The glue outlet of the dispensing valve 12 communicated with the glue inlet 13 is connected with a dispensing head 15. The vertically extending dispensing head 15 is rotatably installed on a substrate 18 horizontally arranged below the dispensing valve 12 through a bearing 17. A motor 20 is installed on the upper surface of the substrate 18 and on one side of the dispensing valve. A driven gear 191 is sleeved outside the dispensing head 15 and below the substrate 18, and a driving gear 192 meshing with the driven gear 191 is in transmission connection with the output shaft of the motor 20;

[0030] When dispensing is required, the dispensing valve is integrally installed on a three-axis driving mechanism for dispensing operation on the edges around the rectangular photovoltaic glass;

[0031] Place the photovoltaic glass to be dispensed horizontally below the dispensing head. Under the action of the three-axis drive mechanism, first move the dispensing head to an appropriate height at a corner of the photovoltaic glass and make the rectangular dispensing orifice of the dispensing head parallel to one side of the photovoltaic glass. Then, the three-axis drive mechanism drives the dispensing head to move along the length direction of the other side of the photovoltaic glass and opens the dispensing gap of the dispensing valve while moving, so as to realize the dispensing operation at one edge of the photovoltaic glass.

[0032] The above-mentioned motor 20 is installed on the upper surface of the substrate 18 through a support base 21. The lower end of the output shaft of the motor 20 is connected with a rotating shaft 23 through a coupling 22. The lower end of the rotating shaft 23 passes through the substrate 18 and installs the driving gear 192.

[0033] An induction piece 241 that can rotate with it is installed on the rotating shaft 23, and a sensor 242 that cooperates with the induction piece 241 is installed on the support base 21.

[0034] At the upper end of the side wall of the above-mentioned dispensing valve 12, a first air pipe joint 141 and a second air pipe joint 142 that are communicated with the inside of the dispensing valve 12 are provided.

[0035] The upper surface of the pressing plate body 1 has an upward convex portion 8. A plurality of mounting holes 5 that extend horizontally and are parallel to each other are opened on the side surface of the convex portion 8 and on both sides of the glue outlet through hole 4.

[0036] The above-mentioned mounting hole 5 is a through hole.

[0037] The rotating shaft 23 and the support base 21 are rotatably connected through a bearing.

[0038] The diameter ratio of the above-mentioned driven gear 191 to the driving gear 192 is 2, and 2 sensors 242 are provided and are spaced 180° in the circumferential direction.

[0039] An installation block 25 is provided between the above-mentioned dispensing valve 12 and the substrate 18. The upper part of the dispensing head 15 is embedded in the installation groove 251 opened on the lower surface of the installation block 25 and is rotatably and sealingly fitted with the inner wall of the installation groove 251 through at least 2 rotary sealing rings 26. A glue inlet hole 252 is opened on the upper surface of the installation block 25, and the upper end of the glue inlet hole 252 whose lower end is communicated with the installation groove 251 is connected to the glue outlet of the dispensing valve 12.

[0040] The installation block 25 and the dispensing valve 12 are sealingly connected through a sealing ring provided outside the glue inlet hole 252.

[0041] The dispensing orifice 16 at one end of the above-mentioned dispensing head 15 opposite to the dispensing valve 12 is rectangular.

[0042] There are 16 such heating rods 6 with a total power of 32 KW, which can achieve a temperature increase of up to 250 °C within half an hour to facilitate temperature control.

[0043] Embodiment 2: A hot-melting glue mechanism, comprising: a carrier plate 200 for placing a hot-melt glue cylinder 100, at least two lifting cylinders 300 vertically installed on the upper surface of the carrier plate 200, a movable plate 400 connected between the upper ends of the piston rods of the lifting cylinders 300, and a pressing plate body 1 connected to the movable plate 400 through at least two vertical connecting rods 500, and a dispensing valve 12 respectively provided with a glue inlet 13 and a glue outlet. A sealing groove 2 extending along the entire circumferential direction is provided on the side surface of the pressing plate body 1, and a sealing ring 3 is embedded in the sealing groove 2 and protrudes from the side surface of the pressing plate body 1. A glue outlet through hole 4 penetrating up and down is provided in the center of the pressing plate body 1. The lower surface of the pressing plate body 1 is used for extrusion contact with the upper surface of the hot-melt colloid. A plurality of mounting holes 5 are provided on the pressing plate body 1 and outside the glue outlet through hole 4, and a heating rod 6 is embedded in each mounting hole 5;

[0044] The glue outlet through hole 4 of the pressing plate body 1 is communicated with the glue inlet 13 of the dispensing valve 12. The glue outlet of the dispensing valve 12 communicated with the glue inlet 13 is connected with a dispensing head 15. The vertically extending dispensing head 15 is rotatably installed on a substrate 18 horizontally arranged below the dispensing valve 12 through a bearing 17. A motor 20 is installed on the upper surface of the substrate 18 on one side of the dispensing valve. A driven gear 191 is sleeved outside the dispensing head 15 and below the substrate 18, and a driving gear 192 meshing with the driven gear 191 is in transmission connection with the output shaft of the motor 20;

[0045] By rotating the motor to drive the driven gear meshing with the driving gear to rotate, the dispensing head rotates 90°. During this process, the glue outlet gap of the dispensing valve is closed;

[0046] Then, the dispensing head is driven by a three-axis driving mechanism to move along the length direction of the other side of the photovoltaic glass perpendicular to the side where the dispensing has been completed, and the glue outlet gap of the dispensing valve is opened while moving, so as to realize the dispensing operation at the edge of the other side of the photovoltaic glass;

[0047] In this way, the continuous dispensing operation at the edges of the four sides of the photovoltaic glass is realized, improving the continuity and efficiency of dispensing.

[0048] The above-mentioned motor 20 is installed on the upper surface of the substrate 18 through a support seat 21. The lower end of the output shaft of the motor 20 is connected with a rotating shaft 23 through a coupling 22, and the lower end of the rotating shaft 23 passes through the substrate 18 and is provided with the driving gear 192.

[0049] The above-mentioned rotating shaft 23 is rotatably connected to the substrate 18 through a bearing.

[0050] An installation block 25 is provided between the above-mentioned dispensing valve 12 and the substrate 18. The upper part of the dispensing head 15 is embedded in the installation groove 251 formed on the lower surface of the installation block 25 and is rotatably and sealingly fitted with the inner wall of the installation groove 251 through at least two rotary sealing rings 26. A glue inlet hole 252 is formed on the upper surface of the installation block 25, and the upper end of the glue inlet hole 252 with the lower end communicating with the installation groove 251 is connected to the glue outlet of the dispensing valve 12.

[0051] The above-mentioned heating rods 6 are provided with 16 pieces, with a total power of 32 KW, and can achieve a maximum temperature increase of 250 °C within half an hour for easy temperature control.

[0052] The above-mentioned installation hole 5 is a blind hole formed on the upper surface of the pressure plate body 1 and extending in the vertical direction.

[0053] A cover plate 7 is provided above the above-mentioned pressure plate body 1 to shield the wiring of structures such as heating rods to ensure safety and aesthetics.

[0054] The above-mentioned cover plate 7 and the pressure plate body 1 are fixedly connected by a plurality of bolts.

[0055] A through hole 71 communicating with the above-mentioned glue outlet through hole 4 is formed on the upper surface of the above-mentioned cover plate 7.

[0056] On the upper surfaces of the above-mentioned cover plate 7 and the pressure plate body 1 respectively and located outside the glue outlet through hole 4, an air outlet hole 91 penetrating up and down is formed. The lower end of a sealing rod 92 penetrates into the two mutually communicating air outlet holes 91 and is sealingly connected to the air outlet hole 91 through threads.

[0057] The lower end of the above-mentioned sealing rod 92 is set to a pointed cone shape, and a handle is provided at the upper end of the sealing rod 92.

[0058] The above-mentioned sealing grooves 2 and sealing rings 3 are both provided with 2 pieces and are spaced apart axially on the pressure plate body 1.

[0059] The above-mentioned pressure plate body 1 includes a metal body and a high-temperature resistant coating coated on the surface of the metal body.

[0060] The above-mentioned metal body is an aluminum body, and the high-temperature resistant coating is a Teflon coating.

[0061] The above-mentioned hot melt adhesive cylinder 100 is arranged between two lifting cylinders 300.

[0062] The lower surface of the above-mentioned movable plate 400 and the upper surface of the pressure plate body 1 are connected by two vertical connecting rods 500, so that the pressure plate body 1 can move vertically with the movable plate 400.

[0063] The working principle of the present utility model is as follows:

[0064] When glue supply is required, the heating rod first preheats the pressure plate to about 100°C, and the pressure plate is installed in the incoming glue bucket of the hot-melt adhesive. The sealing ring on the pressure plate is in extrusion contact with the inner wall of the hot-melt adhesive barrel to achieve sealing between the two.

[0065] In the initial state, the glue in the hot-melt adhesive barrel is in a solid state.

[0066] The heat generated by the heating rod heats the temperature of the pressure plate to 150 - 160°C. The specific heating temperature can be set, and the maximum can be heated to 250°C. The high-temperature pressure plate contacts the solid hot-melt adhesive. The glue remains in a molten state for half an hour at a temperature of 150°C, causing the hot-melt adhesive about 10 cm in the upper layer to melt into a flowable liquid state. A certain pressure is always maintained between the pressure plate and the glue liquid level. When liquid glue overflows from the air vent, the sealing rod is installed in the air vent to seal the air vent.

[0067] When dispensing glue is required, the dispensing valve is integrally installed on the three-axis driving mechanism for dispensing glue at the edge around the rectangular photovoltaic glass.

[0068] The photovoltaic glass to be dispensed with glue is horizontally placed under the dispensing head. Under the action of the three-axis driving mechanism, the dispensing head is first moved to a suitable height at a corner of the photovoltaic glass and the rectangular dispensing port of the dispensing head is parallel to one side of the photovoltaic glass. Then, the three-axis driving mechanism drives the dispensing head to move along the length direction of the other side of the photovoltaic glass and opens the glue outlet gap of the dispensing valve while moving, thereby realizing the dispensing operation on the edge of one side of the photovoltaic glass.

[0069] Next, the rotation of the motor drives the driven gear meshing with the driving gear to rotate, causing the dispensing head to rotate 90°. During this process, the glue outlet gap of the dispensing valve is closed.

[0070] Then, the three-axis driving mechanism drives the dispensing head to move along the length direction of the other side of the photovoltaic glass perpendicular to the side where the dispensing has been completed and opens the glue outlet gap of the dispensing valve while moving, thereby realizing the dispensing operation on the edge of the other side of the photovoltaic glass.

[0071] By repeating this process, continuous dispensing operations are carried out on the edges around the photovoltaic glass, improving the continuity and efficiency of dispensing.

[0072] When the above-mentioned hot melting point glue mechanism is adopted, it heats the pressing plate body through a heating rod and then contacts with solid hot melt glue, which can quickly heat the hot melt glue in the initial solid state, and discharge the molten hot melt glue liquid with fluidity outward from the glue outlet through hole to achieve continuous glue supply. It also cooperates the driven gear on the dispensing head with the driving gear, and realizes the quick switching of the dispensing direction through the rotation of the dispensing head, improving the continuity and efficiency of dispensing.

[0073] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A hot melt glue dispensing mechanism, comprising: A carrier plate (200) for placing a hot melt adhesive tube (100), at least two lifting cylinders (300) vertically mounted on the upper surface of the carrier plate (200), a movable plate (400) connected between the upper ends of the piston rods of the lifting cylinders (300), a pressure plate body (1) connected to the movable plate (400) via at least two vertical connecting rods (500), and a glue dispensing valve (12) respectively provided with a glue inlet (13) and a glue outlet, wherein a sealing groove (2) extending along the entire circumference is provided on the side surface of the pressure plate body (1), a sealing ring (3) is embedded and mounted in the sealing groove (2) and protrudes from the side surface of the pressure plate body (1), and a glue outlet through hole (4) extending from top to bottom is provided in the center of the pressure plate body (1); The invention is characterized in that: the lower surface of the pressure plate body (1) is used for extrusion contact with the upper surface of the hot melt adhesive, a plurality of mounting holes (5) are provided on the pressure plate body (1) and are located outside the adhesive outlet hole (4), a heating rod (6) is embedded and installed in each of the mounting holes (5), the adhesive outlet hole (4) of the pressure plate body (1) is connected to the adhesive inlet (13) of the adhesive dispensing valve (12), the adhesive outlet of the adhesive dispensing valve (12) is connected to a adhesive head (15), and the adhesive outlet of the adhesive dispensing valve (12) is vertically extended. The extended dispensing head (15) is rotatably mounted on a base plate (18) horizontally arranged below the dispensing valve (12) via a bearing (17); a motor (20) is mounted on the upper surface of the base plate (18) and located on one side of the dispensing valve; a driven gear (191) is sleeved on the outer side of the dispensing head (15) and located below the base plate (18); and a driving gear (192) meshing with the driven gear (191) is drivingly connected to an output shaft of the motor (20).

2. The hot melt glue dispensing mechanism according to claim 1, characterized in that: The motor (20) is mounted on the upper surface of the base plate (18) via a support seat (21); the lower end of the output shaft of the motor (20) is connected to a rotating shaft (23) via a coupling (22); the lower end of the rotating shaft (23) passes through the base plate (18) and is mounted with the driving gear (192).

3. The hot melt glue dispensing mechanism according to claim 2, characterized in that: A sensing sheet (241) that can rotate with the rotating shaft (23) is mounted on the rotating shaft, and a sensor (242) that cooperates with the sensing sheet (241) is mounted on the supporting seat (21).

4. The hot melt glue dispensing mechanism according to claim 1, characterized in that: A first air pipe joint (141) and a second air pipe joint (142) which are in communication with the interior of the dispensing valve (12) are provided at the upper end of the side wall of the dispensing valve (12).

5. The hot melt glue dispensing mechanism according to claim 1, characterized in that: The upper surface of the pressure plate body (1) has an upward protrusion (8), and a plurality of mounting holes (5) extending in a horizontal direction and parallel to each other are provided on the side surface of the protrusion (8) and located on both sides of the glue outlet through hole (4).

6. The hot melt glue dispensing mechanism according to claim 5, characterized in that: The mounting hole (5) is a through hole.

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