A continuous dispensing precision metering mechanism for dispensing adhesives

Abstract

This utility model relates to a continuous dispensing precision metering mechanism for dispensing adhesive, comprising: a drive unit; and a pump unit, the power drive portion of which is connected to the output end of the drive unit. The pump unit includes a transmission rod, a piston, a first dispensing seat, a first adhesive storage element, a second adhesive storage element, and a return element. The first dispensing seat has a dispensing port, and the second adhesive storage element has an inlet port. The dispensing port is for adhesive to flow out of the first dispensing seat, and the inlet port is for adhesive to enter the second adhesive storage element. This utility model's continuous dispensing precision metering mechanism uses a servo motor as the power drive unit to ensure operational accuracy. A return pipe is added to the pump unit, allowing the metering mechanism to dispense adhesive regardless of its vertical movement. One-way ball valves are used on both sides of the adhesive cavity, allowing the dispensing mode of the metering mechanism to automatically change according to the servo motor's movement. Precise and continuous dispensing can be achieved solely through the metering mechanism, without the need for power or external auxiliary electrical components.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a continuous dispensing precision metering mechanism for dispensing. Background Technology

[0002] Dispensing technology has a wide range of applications, playing a crucial role in semiconductor packaging, integrated circuits, SMT / PCB assembly, and general industrial soldering, coating, and sealing. As the integration of precision components increases, the amount of adhesive dispensed, the accuracy of dispensing position, and the automation level of precision dispensing equipment are increasingly insufficient to meet current requirements. Some manual dispensing processes still exist, but their automation level is low, and production efficiency is highly dependent on the operator's skill level. In particular, when dispensing adhesive for micro-assemblies, it is easy to over-dispense, leading to increased production costs and low yield rates.

[0003] With the gradual improvement of production automation, more and more devices are using automatic control to achieve dispensing. For example, Chinese Patent (Publication No. CN208494765U) discloses a dispensing device with controllable dispensing volume. When the dispensing device is in dispensing mode, the dispensing lifting cylinder drives the lifting bar to move towards the item to be dispensed, and the synchronous lifting cylinder drives the movable end of the isolator away from the dispensing nozzle. The time controller directly or indirectly controls the pusher to push within the set time. In this way, the dispensing volume of the dispensing device is strictly controlled.

[0004] However, although the above-mentioned dispensing device can play a certain role in controlling the amount of glue dispensed, its control effect is poor and it cannot achieve precise control of the amount of glue dispensed. Therefore, it cannot meet the operational requirements for products with high production requirements. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the problem in the prior art that products with high requirements for dispensing amount cannot maintain high precision, and thus cannot achieve the best metering effect.

[0006] To solve the above-mentioned technical problems, this utility model provides a continuous dispensing precision metering mechanism for dispensing adhesives, comprising: a drive unit; and a pump unit, the power drive part of which is connected to the output end of the drive unit; wherein, the pump unit includes a transmission rod, a piston, a first dispensing seat, a first adhesive storage element, a second adhesive storage element, and a return element, the first dispensing seat and the second adhesive storage element are respectively connected to both ends of the first adhesive storage element, and the first adhesive storage element communicates internally with the first dispensing seat and the second adhesive storage element, the other end of the transmission rod passes through the first dispensing seat and is located inside the first adhesive storage element, the end of the transmission rod located inside the first adhesive storage element is connected to the piston, and the transmission rod is located outside the first dispensing seat. One end of the piston is connected to the output end of the drive unit, and the drive unit is used to drive the transmission rod to perform reciprocating piston motion in the cavity of the first glue storage element. The piston is set in the inner cavity of the first glue storage element and is pressed and sealed with the inner wall of the cavity of the first glue storage element. The piston divides the inner cavity of the first glue storage element into two independent cavities. The two ends of the return element are respectively connected to the first glue outlet seat and the second glue storage element, and the return element communicates with the interior of the first glue outlet seat and the second glue storage element. The first glue outlet seat is provided with a glue outlet, and the second glue storage element is provided with a glue inlet. The glue outlet is used for the glue to flow out of the first glue outlet seat, and the glue inlet is used for the glue to enter the second glue storage element.

[0007] In one embodiment of this utility model, the first dispensing seat is provided with a first flow channel, the first glue storage element is provided with a first cavity, the second glue storage element is provided with a second flow channel, the return element is provided with a return flow channel, the piston is located in the first cavity and is pressed tightly against the inner wall of the first cavity, the two ends of the first cavity are respectively connected to the first flow channel and the second flow channel, the two ends of the return flow channel are respectively connected to the first flow channel and the second flow channel, the first flow channel is connected to the dispensing port, and the glue inlet is connected to the second flow channel.

[0008] In one embodiment of this utility model, a first spring and a first ceramic ball are provided inside the glue inlet. A first recessed groove is provided on the inner wall of the glue inlet. The first ceramic ball is located at one end of the first groove near the glue inlet side. The first spring and the first ceramic ball are connected. The first spring is used to provide elastic force to the first ceramic ball so that the outer wall of the first ceramic ball contacts the inner wall of the first groove. The first ceramic ball is used to open or close the glue inlet side of the glue inlet and the second flow channel.

[0009] In one embodiment of this utility model, a second spring and a second ceramic ball are provided at one end of the return channel near the second channel. A second recessed groove is provided on the inner wall of the return channel near the second channel. The second ceramic ball is disposed in the second groove and is connected to the second spring. The second spring is used to provide elastic force to the second ceramic ball so that the outer wall of the second ceramic ball contacts the inner wall of the second groove. The second ceramic ball is used to realize the opening or closing of the second channel and the return channel.

[0010] In one embodiment of this utility model, when the drive unit drives the transmission rod to move the piston back and forth in the first cavity, the cavities on both sides of the piston in the first cavity switch between the high-pressure cavity and the low-pressure cavity.

[0011] In one embodiment of this utility model, a first through hole is provided on the first dispensing seat along the same straight line as the first cavity, the transmission rod passes through the first through hole, and a sealing element is provided between the inner wall of the first through hole and the transmission rod.

[0012] In one embodiment of this utility model, a guide sleeve is installed on the first dispensing seat, the transmission rod passes through the guide sleeve, and the transmission rod can slide within the guide sleeve.

[0013] In one embodiment of this utility model, the drive unit includes a servo motor, a driving pulley, a driven pulley, a synchronous belt, a drive screw, and a support frame. The servo motor is mounted on the support frame, and the output end of the servo motor is connected to the driving pulley. The driving pulley is connected to the driven pulley via the synchronous belt. The driven pulley and the drive screw are connected via a threaded pair. The transmission rod is connected to the drive screw, and the transmission rod and the drive screw move synchronously in a linear fashion.

[0014] In one embodiment of this utility model, a connecting block is connected to the drive screw, a guide slider is connected to the connecting block, a guide rail is provided on the support frame in the same direction as the axis of the drive screw, the guide slider is disposed on the guide rail, and the guide slider can slide along the guide rail.

[0015] In one embodiment of this utility model, the first glue outlet is connected to the support frame.

[0016] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0017] The continuous dispensing precision metering mechanism for dispensing described in this utility model uses a servo motor as the driving unit, and the motor driver and encoder ensure the motion accuracy of the servo motor. A return pipe is added to the pump unit so that the metering mechanism can dispense glue regardless of its up and down movement. One-way ball valves are used on both sides of the glue chamber so that the dispensing mode of the metering mechanism can be automatically changed according to the motion of the servo motor. No power or external auxiliary electrical components are required; precise and continuous dispensing can be achieved solely through the metering mechanism. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0019] Figure 1 This is a left view of the continuous dispensing precision metering mechanism for dispensing in a preferred embodiment of the present invention;

[0020] Figure 2 This is a front view of the continuous dispensing precision metering mechanism for dispensing in a preferred embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the pump body unit in a preferred embodiment of the present invention;

[0022] Figure 4 This is a front view of the pump body unit in a preferred embodiment of the present invention;

[0023] Figure 5 This is a preferred embodiment of the present invention. Figure 4 Cross-sectional view along the AA direction;

[0024] Figure 6 This is a schematic diagram of the drive unit in a preferred embodiment of the present invention;

[0025] Figure 7 This is a cross-sectional view of the transmission rod when it is extended in a preferred embodiment of this utility model;

[0026] Figure 8 This is a cross-sectional view of the transmission rod under internal pressure in a preferred embodiment of the present invention.

[0027] Explanation of reference numerals in the accompanying drawings: Drive unit 100, servo motor 101, drive pulley 102, driven pulley 103, synchronous belt 104, drive screw 105, support frame 106, connecting block 107, guide slider 108, guide rail 109, pump unit 200, transmission rod 1, piston 2, first glue outlet 3, glue outlet 31, first flow channel 32, first through hole 33, sealing element 34, guide sleeve 35, first glue storage element 4, first cavity 41, upper cavity 411, lower cavity 412, second glue storage element 5, glue inlet 51, first spring 511, first ceramic ball 512, first groove 513, second flow channel 52, return element 6, return flow channel 61, second spring 611, second ceramic ball 612, second groove 613. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0029] Reference Figure 1 and 2 As shown, the continuous dispensing precision metering mechanism for dispensing according to this utility model includes: a drive unit 100 and a pump unit 200, wherein the power drive part of the pump unit 200 is connected to the output end of the drive unit 100. The main operation of the pump unit 200 is divided into two parts: the first part is that the drive unit 100 drives the transmission rod inside the pump unit 200 to move upward; the second part is that the drive unit 100 drives the transmission rod inside the pump unit 200 to move downward, thereby realizing continuous dispensing.

[0030] Among them, reference Figure 3-5As shown, the pump body unit 200 includes a transmission rod 1, a piston 2, a first dispensing seat 3, a first glue storage element 4, a second glue storage element 5, and a return element 6. The first dispensing seat 3 and the second glue storage element 5 are respectively connected to both ends of the first glue storage element 4, and the first glue storage element 4 communicates internally with the first dispensing seat 3 and the second glue storage element 5. The other end of the transmission rod 1 passes through the first dispensing seat 3 and is located inside the first glue storage element 4. One end of the transmission rod 1 located inside the first glue storage element 4 is connected to the piston 2, and the other end of the transmission rod 1 located outside the first dispensing seat 3 is connected to the output end of the drive unit 100. The drive unit 100 is used to drive the transmission rod 1 in the first dispensing seat 3. The first glue storage element 4 has a reciprocating piston movement inside its cavity. The piston 2 is located inside the cavity of the first glue storage element 4 and is pressed and sealed against the inner wall of the cavity. The piston 2 divides the cavity of the first glue storage element 4 into two independent cavities. The two ends of the return element 6 are connected to the first glue outlet 3 and the second glue storage element 5, respectively, and the return element 6 communicates with the interior of the first glue outlet 3 and the second glue storage element 5. The first glue outlet 3 is provided with a glue outlet 31, and the second glue storage element 5 is provided with a glue inlet 51. The glue outlet 31 is used for the glue to flow out of the first glue outlet 3, and the glue inlet 51 is used for the glue to enter the second glue storage element 5.

[0031] In the above structure, the first glue outlet 3 has a first flow channel 32, the first glue storage element 4 has a first cavity 41, the second glue storage element 5 has a second flow channel 52, the return element 6 has a return flow channel 61, the piston 2 is located in the first cavity 41 and is pressed tightly against the inner wall of the first cavity 41, the two ends of the first cavity 41 are respectively connected to the first flow channel 32 and the second flow channel 52, the two ends of the return flow channel 61 are respectively connected to the first flow channel 32 and the second flow channel 52, the first flow channel 32 is connected to the glue outlet 31, and the glue inlet 51 is connected to the second flow channel 52. The piston 2 divides the first cavity 41 into an upper cavity 411 and a lower cavity 412, the upper cavity 411 is connected to the first flow channel 32, and the lower cavity 412 is connected to the second flow channel 52. The first flow channel 32, the second flow channel 52, the first cavity 41, and the return flow channel 61 are arranged in a "ㅍ" shape, with the first flow channel 32 and the second flow channel 52 located vertically, and the return flow channel 61 and the first cavity 41 located horizontally. The second flow channel 52 penetrates the second glue storage element 5, and each end of the second flow channel 52 extending to the surface of the second glue storage element 5 is provided with a plug. The first flow channel 32 extends to the outer wall of one side of the first glue outlet 3, and the end of the first flow channel 32 located on the outer wall of the first glue outlet 3 is provided with a plug.

[0032] In the above structure, the glue inlet 51 is provided with a first spring 511 and a first ceramic ball 512. The inner wall of the glue inlet 51 has a recessed first groove 513. The first ceramic ball 512 is located at the end of the first groove 513 near the glue inlet side of the glue inlet 51. The first spring 511 and the first ceramic ball 512 are connected. The first spring 511 provides elastic force to the first ceramic ball 512, causing the outer wall of the first ceramic ball 512 to contact the inner wall of the first groove 513. The first ceramic ball 512 is used to open or close the glue inlet side of the glue inlet 51 and the second flow channel 52. The first groove 513 is annular, forming a circle around the inner wall of the glue inlet 51.

[0033] In the above structure, the return channel 61 is provided with a second spring 611 and a second ceramic ball 612 at one end near the second channel 52. The inner wall of the return channel 61 near the second channel 52 is provided with a recessed second groove 613. The second ceramic ball 612 is disposed within the second groove 613 and is connected to the second spring 611. The second spring 611 provides elastic force to the second ceramic ball 612, causing the outer wall of the second ceramic ball 612 to contact the inner wall of the second groove 613. The second ceramic ball 612 is used to open or close the connection between the second channel 52 and the return channel 61. The second groove 613 is annular, forming a circle around the inner wall of the return channel 61.

[0034] In the above structure, when the drive unit 100 drives the transmission rod 1 to move the piston 2 reciprocally within the first cavity 41, the cavities located on both sides of the piston 2 in the first cavity 41 switch between high-pressure and low-pressure cavities. The transmission rod 1... Figure 4 When the first chamber 41 moves upward in the direction of the paper surface, the portion of the first chamber 41 above the piston 2 is the high-pressure chamber, and the portion of the first chamber 41 below the piston 2 is the low-pressure chamber; the transmission rod 1 moves upward according to... Figure 4 When the paper moves downwards, the portion of the first cavity 41 above the piston 2 is the low-pressure cavity, and the portion of the first cavity 41 below the piston 2 is the high-pressure cavity.

[0035] In the above structure, the first dispensing seat 3 has a first through hole 33 on the same straight line as the first cavity 41, the transmission rod 1 passes through the first through hole 33, and a sealing element 34 is provided between the inner wall of the first through hole 33 and the transmission rod 1. A guide sleeve 35 is installed on the first dispensing seat 3, the transmission rod 1 passes through the guide sleeve 35, and the transmission rod 1 can slide within the guide sleeve 35.

[0036] Reference Figure 8As shown, the drive unit 100 includes a servo motor 101, a drive pulley 102, a driven pulley 103, a synchronous belt 104, a drive screw 105, and a support frame 106. The servo motor 101 is mounted on the support frame 106. The output end of the servo motor 101 is connected to the drive pulley 102. The drive pulley 102 is connected to the driven pulley 103 via the synchronous belt 104. The driven pulley 103 and the drive screw 105 are connected via a threaded pair. The transmission rod 1 is connected to the drive screw 105, and the transmission rod 1 and the drive screw 105 move synchronously in a linear fashion. The first glue outlet 3 is connected to the support frame 106.

[0037] In the above structure, a connecting block 107 is connected to the drive screw 105, and a guide slider 108 is connected to the connecting block 107. The support frame 106 is provided with a guide rail 109 that is in the same direction as the axis of the drive screw 105. The guide slider 108 is disposed on the guide rail 109 and can slide along the guide rail 109.

[0038] The working principle of the drive unit 100 is as follows: the servo motor 101 drives the active pulley 102, and the active pulley 102 drives the driven pulley 103 through the synchronous belt 104. Since the driven pulley 103 is fixed on the base by bearings, it will not move up and down. Since the drive screw 105 is slidably connected to the guide rail 109 through the guide slider 108, the drive screw 105 will only move up and down and will not rotate itself.

[0039] Reference Figure 6 As shown, the transmission rod 1 moves upward, and the upper part of the first cavity 41 is a high-pressure cavity. The colloid flows to both sides of the first dispensing seat 3. However, due to the pressure difference on both sides of the second ceramic ball 612, the second ceramic ball 612 will block the lower outlet of the return channel 61, causing the colloid to be unable to flow to the low-pressure cavity and to flow out from the dispensing port on the right side of the first dispensing seat 3.

[0040] At the same time, as the transmission rod 1 moves upward, the low-pressure chamber is in a negative pressure state, and the glue inlet of the second glue storage element 5 is under high pressure. The first ceramic ball 512 will be pushed up by the glue, and the glue will flow into the low-pressure chamber.

[0041] Reference Figure 7 As shown, the transmission rod 1 moves downward, the lower part of the first cavity 41 is a high-pressure cavity, the colloid flows to both sides of the second colloid storage element 5, the second ceramic ball 612 is pushed up by the high-pressure colloid, the return flow channel 61 forms a passage, and the colloid can flow directly out from the colloid outlet of the first colloid outlet 3.

[0042] At the same time, as the transmission rod 1 moves downward, the pressure at the inlet of the second glue storage element 5 is lower than the pressure inside the cavity, and the first ceramic ball 512 will block the inlet to prevent the glue from flowing back.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A continuous dispensing precision metering mechanism for dispensing adhesive, characterized in that, include: Drive unit; The pump body unit has its power drive section connected to the output end of the drive unit; The pump unit includes a transmission rod, a piston, a first dispensing seat, a first glue storage element, a second glue storage element, and a return element. The first dispensing seat and the second glue storage element are respectively connected to both ends of the first glue storage element, and the first glue storage element communicates internally with both the first dispensing seat and the second glue storage element. The other end of the transmission rod passes through the first dispensing seat and is located inside the first glue storage element. The end of the transmission rod inside the first glue storage element is connected to the piston, and the end of the transmission rod outside the first dispensing seat is connected to the output end of the drive unit. The drive unit is used to drive the transmission rod in the first glue storage element. The piston moves back and forth within the cavity of the component. The piston is located in the inner cavity of the first glue storage element and is pressed and sealed against the inner wall of the first glue storage element cavity. The piston divides the inner cavity of the first glue storage element into two independent cavities. The two ends of the return element are respectively connected to the first glue outlet seat and the second glue storage element, and the return element communicates with the interior of the first glue outlet seat and the second glue storage element. The first glue outlet seat is provided with a glue outlet, and the second glue storage element is provided with a glue inlet. The glue outlet is used for the glue to flow out of the first glue outlet seat, and the glue inlet is used for the glue to enter the second glue storage element.

2. The continuous dispensing precision metering mechanism for dispensing according to claim 1, characterized in that: The first dispensing seat has a first flow channel, the first glue storage element has a first cavity, the second glue storage element has a second flow channel, the return element has a return flow channel, the piston is located in the first cavity and is pressed tightly against the inner wall of the first cavity, the two ends of the first cavity are respectively connected to the first flow channel and the second flow channel, the two ends of the return flow channel are respectively connected to the first flow channel and the second flow channel, the first flow channel is connected to the dispensing port, and the glue inlet is connected to the second flow channel.

3. The continuous dispensing precision metering mechanism for dispensing according to claim 2, characterized in that: The glue inlet is provided with a first spring and a first ceramic ball. The inner wall of the glue inlet is provided with a recessed first groove. The first ceramic ball is located at the end of the first groove near the glue inlet side. The first spring and the first ceramic ball are connected. The first spring is used to provide elastic force to the first ceramic ball so that the outer wall of the first ceramic ball contacts the inner wall of the first groove. The first ceramic ball is used to open or close the glue inlet side of the glue inlet and the second flow channel.

4. The continuous dispensing precision metering mechanism for dispensing according to claim 2 or 3, characterized in that: The return channel is provided with a second spring and a second ceramic ball at one end near the second channel. The inner wall of the return channel near the second channel is provided with a concave second groove. The second ceramic ball is disposed in the second groove and is connected to the second spring. The second spring is used to provide elastic force to the second ceramic ball so that the outer wall of the second ceramic ball contacts the inner wall of the second groove. The second ceramic ball is used to open or close the connection between the second channel and the return channel.

5. The continuous dispensing precision metering mechanism for dispensing according to claim 2, characterized in that: When the drive unit drives the transmission rod to move the piston back and forth in the first cavity, the cavities on both sides of the piston in the first cavity switch between the high-pressure cavity and the low-pressure cavity.

6. The continuous dispensing precision metering mechanism for dispensing according to claim 2, characterized in that: The first dispensing seat has a first through hole on the same straight line as the first cavity, the transmission rod passes through the first through hole, and a sealing element is provided between the inner wall of the first through hole and the transmission rod.

7. The continuous dispensing precision metering mechanism for dispensing according to claim 6, characterized in that: A guide sleeve is installed on the first dispensing seat, the transmission rod passes through the guide sleeve, and the transmission rod can slide within the guide sleeve.

8. The continuous dispensing precision metering mechanism for dispensing according to claim 1, characterized in that: The drive unit includes a servo motor, a drive pulley, a driven pulley, a synchronous belt, a drive screw, and a support frame. The servo motor is mounted on the support frame, and the output end of the servo motor is connected to the drive pulley. The drive pulley is connected to the driven pulley via the synchronous belt. The driven pulley and the drive screw are connected via a threaded pair. The transmission rod is connected to the drive screw, and the transmission rod and the drive screw move synchronously in a linear fashion.

9. The continuous dispensing precision metering mechanism for dispensing according to claim 8, characterized in that: A connecting block is connected to the drive screw, and a guide slider is connected to the connecting block. The support frame is provided with a guide rail in the same direction as the axis of the drive screw. The guide slider is set on the guide rail and can slide along the guide rail.

10. The continuous dispensing precision metering mechanism for dispensing according to claim 9, characterized in that: The first dispensing seat is connected to the support frame.

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