Piston-type metering dispensing device

Abstract

This utility model discloses a piston-type metering dispensing device, including a connecting plate. A bearing seat is fixedly connected to the bottom of the connecting plate, and side sealing plates are fixedly connected to both sides of the bearing seat. A fixing plate is fixedly connected to the surface of the side sealing plates. A nut seat slides through the top of the connecting plate via a driving unit. A sensor mounting plate is fixedly connected to one side of the nut seat, and a dispensing mechanism is provided on one side of the side sealing plates. This utility model relates to the field of dispensing equipment technology. Compared with screw valves, this piston-type metering dispensing device is more suitable for metering high-filling particle adhesives. The device first injects the adhesive into a cylinder with a fixed capacity, and then, driven by a drive motor, uses a piston rod to eject the adhesive from the cylinder. The proportion of adhesive is determined by the cylinder diameter and the downward pressure distance of the drive motor. The metering is extremely accurate and stable, and there is no linear increase in the amount of adhesive used after screw valve wear.

Description

Technical Field

[0001] This utility model relates to the field of glue dispensing equipment technology, specifically a piston-type metering glue dispensing device. Background Technology

[0002] The reference patent title is: A Waterproof Adhesive Injection Device (Authorization Announcement No.: CN219898937U, Authorization Announcement Date: 2023.10.27). It includes an injection cylinder, one end of which is equipped with a one-way valve, and the other end of which is equipped with an injection tube head. A sealing seat is threadedly connected to the end of the injection cylinder away from the one-way valve. A concave plate is welded to the side of the sealing seat, and an L-shaped handle is welded to the lower end of the concave plate. Circular holes are arranged in a circumferential array on the side of the L-shaped handle. An L-shaped plate is welded to the side of the L-shaped handle. An extrusion mechanism is installed on the sealing seat, and a piston is installed at one end of the extrusion screw in the extrusion mechanism. The beneficial effect of this device is that when injection is required, rotation causes the rotating shaft to drive a transmission helical gear, which in turn drives a synchronous helical gear, which in turn drives an internal threaded sleeve. This causes the extrusion screw to move along the internal threaded sleeve, pushing the piston to slide along the injection cylinder, thereby causing the adhesive in the injection cylinder to flow out along the one-way valve and the injection tube head.

[0003] Based on the above document, in industrial production fields such as electronic component packaging, LED lighting manufacturing, and automotive parts assembly, precise metering and dispensing of adhesives are frequently required. Traditional dispensing equipment often uses screw valves for metering and dispensing. However, screw valves have the following problems during use:

[0004] Screw valves have poor metering accuracy and stability. As the usage time increases, the wear between the screw and the sleeve will gradually intensify, leading to a linear increase in adhesive content and affecting the consistency of product quality.

[0005] When the screw valve wears out, it is necessary to replace the screw or screw sleeve and other parts, which results in high maintenance costs and a complicated maintenance process, which will affect production efficiency. Therefore, this utility model provides a piston-type metering glue injection device. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a piston-type metering dispensing device, which solves the problems of inaccurate and unstable metering and high maintenance costs associated with traditional screw valves.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a piston-type metering dispensing device, comprising a connecting plate, a bearing seat fixedly connected to the bottom of the connecting plate, side sealing plates fixedly connected to both sides of the bearing seat, a fixing plate fixedly connected to the surface of the side sealing plates, a nut seat sliding via a driving unit at the top of the connecting plate, a sensor mounting plate fixedly connected to one side of the nut seat, and a dispensing mechanism provided on one side of the side sealing plates, the dispensing mechanism comprising:

[0008] The glue injection assembly includes a cylinder liner fixing plate installed on one side of a side sealing plate. A bearing plate is fixedly connected to one side of the cylinder liner fixing plate. A guide sleeve is fixedly connected inside the bearing plate. A piston rod is slidably connected inside the guide sleeve. One end of the piston rod is fixedly connected to one side of a sensor mounting plate. A cylinder liner is installed inside the cylinder liner fixing plate. The inner surface of the cylinder liner is slidably connected to the surface of the piston rod. A manifold is fixedly connected to the other side of the cylinder liner fixing plate. A glue nozzle is installed at the bottom of the manifold. Glue injection adapters are installed on both sides of the manifold.

[0009] The pneumatic assembly is located on one side of the manifold.

[0010] Preferably, the pneumatic assembly includes a pneumatic piston plate installed on one side of the manifold, a pneumatic plate fixedly connected to one side of the pneumatic piston plate, a pressure sensor installed on one side of the pneumatic plate, baffles fixedly connected to both sides of the pneumatic plate, air connectors installed on both sides of the baffles, and a glue-suction pneumatic piston and a glue-injection pneumatic piston installed inside the pneumatic piston plate, with compression springs sleeved on the surfaces of both the glue-suction pneumatic piston and the glue-injection pneumatic piston.

[0011] Preferably, a first adhesive film is provided between the manifold and the pneumatic piston plate, and a second adhesive film is provided between the pneumatic piston plate and the pneumatic plate.

[0012] Preferably, a viewing window is installed on the surface of the bearing plate, and a muffler is installed on one side of the piston fixing plate.

[0013] Preferably, the drive unit includes a drive motor mounted on the top of the connecting plate. One end of the output shaft of the drive motor is fixedly connected to a synchronous pulley via a coupling. A transmission pulley is connected to the surface of the synchronous pulley via a synchronous belt drive. A lead screw is fixedly connected inside the transmission pulley. A guide rail slider is threadedly connected to the surface of the lead screw. One side of the guide rail slider is fixedly connected to one side of the nut seat.

[0014] Preferably, a symmetrical guide rail is installed at the bottom of the bearing housing, the surface of the guide rail is slidably connected to the inside of the guide rail slider, a guide rail mounting plate is installed on the rear side of the bearing housing, and a bottom sealing plate is installed at the bottom of the guide rail mounting plate.

[0015] Beneficial effects

[0016] This invention provides a piston-type metering dispensing device. Compared with the prior art, it has the following advantages:

[0017] 1. Compared with screw valves, this piston-type metering dispensing device is more suitable for metering high-filler particle adhesives. The piston-type metering dispensing device first injects the adhesive into a cylinder with a fixed capacity, and then, driven by the drive motor, uses the piston rod to eject the adhesive from the cylinder. The proportion of adhesive is determined by the cylinder diameter and the downward pressing distance of the drive motor. The metering is extremely accurate and stable, and there is no linear increase in the amount of adhesive used after the screw valve wears out.

[0018] 2. This piston-type metering dispensing device fills the cylinder liner with glue by pressure, preventing voids and allowing for reconfirmation of insufficient glue pressure (if the piston rod position sensor does not detect a signal within a specified time). Furthermore, the maintenance cost of this piston-type metering dispensing device is far lower than that of a screw valve, facilitating subsequent use and not affecting work progress. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the external structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0021] Figure 3 This is an exploded structural diagram of the drive unit of this utility model;

[0022] Figure 4 This is an exploded structural diagram of the glue injection mechanism of this utility model.

[0023] In the diagram: 1-Connecting plate, 2-Bearing housing, 3-Side sealing plate, 4-Fixing plate, 5-Drive unit, 51-Drive motor, 52-Synchronous pulley, 53-Synchronous belt, 54-Transmission pulley, 55-Screw screw, 56-Guide rail slider, 6-Nut seat, 7-Sensor mounting plate, 8-Bottom sealing plate, 9-Glue injection mechanism, 91-Glue injection assembly, 911-Cylinder liner fixing plate, 912-Guide sleeve, 913-Piston rod, 914-Cylinder liner, 915-Manifold. 916-Dispensing nozzle, 917-Injection adapter, 918-Bearing plate, 92-Pneumatic assembly, 921-Pneumatic piston plate, 922-Pneumatic plate, 923-Pressure sensor, 924-Baffle, 925-Air connector, 926-Suction pneumatic piston, 927-Injection pneumatic piston, 928-Compression spring, 10-First glue diaphragm, 11-Second glue diaphragm, 12-Viewing window, 13-Silencer, 14-Guide rail, 15-Guide rail mounting plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution:

[0026] A piston-type metering dispensing device includes a connecting plate 1, a bearing seat 2 fixedly connected to the bottom of the connecting plate 1, side sealing plates 3 fixedly connected to both sides of the bearing seat 2, a fixing plate 4 fixedly connected to the surface of the side sealing plates 3, a nut seat 6 sliding on the top of the connecting plate 1 via a driving unit 5, a sensor mounting plate 7 fixedly connected to one side of the nut seat 6, and a dispensing mechanism 9 provided on one side of the side sealing plates 3. The dispensing mechanism 9 includes:

[0027] The glue injection assembly 91 includes a cylinder liner fixing plate 911 installed on one side of the side sealing plate 3. A bearing plate 918 is fixedly connected to one side of the cylinder liner fixing plate 911. A guide sleeve 912 is fixedly connected inside the bearing plate 918. A piston rod 913 is slidably connected inside the guide sleeve 912. One end of the piston rod 913 is fixedly connected to one side of the sensor mounting plate 7. A cylinder liner 914 is installed inside the cylinder liner fixing plate 911. The inner surface of the cylinder liner 914 is slidably connected to the surface of the piston rod 913. A manifold 915 is fixedly connected to the other side of the cylinder liner fixing plate 911. A glue nozzle 916 is installed at the bottom of the manifold 915. Glue injection adapters 917 are installed on both sides of the manifold 915.

[0028] Pneumatic component 92 is located on one side of manifold 915.

[0029] The guide sleeve 912 is used to guide and position the piston rod 913;

[0030] The sensor mounting plate 7 is equipped with a displacement sensor to detect the displacement data of the piston rod 913 and improve accuracy.

[0031] The 917 glue dispensing adapter is used to connect to an external glue storage device.

[0032] In this embodiment, the pneumatic assembly 92 includes a pneumatic piston plate 921 installed on one side of the manifold 915. A pneumatic plate 922 is fixedly connected to one side of the pneumatic piston plate 921. A pressure sensor 923 is installed on one side of the pneumatic plate 922. Baffles 924 are fixedly connected to both sides of the pneumatic plate 922. Air connectors 925 are installed on both sides of the baffles 924. A glue-absorbing pneumatic piston 926 and a glue-injecting pneumatic piston 927 are installed inside the pneumatic piston plate 921. Compression springs 928 are sleeved on the surfaces of both the glue-absorbing pneumatic piston 926 and the glue-injecting pneumatic piston 927.

[0033] The 923 pressure sensor is a commonly used sensor in industrial practice. It can sense pressure and convert it into electrical energy.

[0034] Compared to screw valves, this device is more suitable for metering high-filling particle adhesives. The piston-type metering dispensing device first injects the adhesive into a cylinder liner 914 of a fixed capacity. Then, driven by the drive motor 51, the piston rod 913 ejects the adhesive from the cylinder liner 914. The proportion of adhesive is determined by the diameter of the cylinder liner 914 and the downward pressure distance of the drive motor 51. The metering is extremely accurate and stable, and there is no linear increase in the amount of adhesive used after the screw valve wears out.

[0035] In this embodiment, a first adhesive film 10 is provided between the manifold 915 and the pneumatic piston plate 921, and a second adhesive film 11 is provided between the pneumatic piston plate 921 and the pneumatic plate 922.

[0036] In this embodiment, a viewing window 12 is installed on the surface of the support plate 918, and a muffler 13 is installed on one side of the piston fixing plate 4.

[0037] In this embodiment, the drive unit 5 includes a drive motor 51 mounted on the top of the connecting plate 1. One end of the output shaft of the drive motor 51 is fixedly connected to a synchronous pulley 52 via a coupling. The surface of the synchronous pulley 52 is connected to a transmission pulley 54 via a synchronous belt 53. A lead screw 55 is fixedly connected inside the transmission pulley 54. A guide rail slider 56 is threadedly connected to the surface of the lead screw 55. One side of the guide rail slider 56 is fixedly connected to one side of the nut seat 6.

[0038] The drive motor 51 is a servo motor and is connected to an external circuit via wires.

[0039] In this embodiment, a symmetrical guide rail 14 is installed at the bottom of the bearing seat 2. The surface of the guide rail 14 is slidably connected to the inside of the guide rail slider 56. A guide rail mounting plate 15 is installed on the rear side of the bearing seat 2, and a bottom sealing plate 8 is installed at the bottom of the guide rail mounting plate 15.

[0040] The guide rail 14 is used to limit the sliding movement of the guide rail slider 56.

[0041] The glue is filled into the cylinder liner 914 by pressure, which will not produce voids and can reconfirm the glue pressure if it is low (if the piston rod position sensor does not detect a signal within a specified time). At the same time, the maintenance cost of this piston-type metering glue injection device is much lower than that of the screw valve, which facilitates subsequent use and will not affect the work progress.

[0042] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0043] During operation, glue is first injected into a cylinder liner 914 of a fixed capacity through the glue injection adapter 917. Then, the drive motor 51 is started to drive the synchronous pulley 52 to rotate. The synchronous pulley 52 drives the transmission pulley 54 to rotate through the synchronous belt 53. The rotation of the transmission pulley 54 drives the lead screw 55 to rotate. The rotation of the lead screw 55 causes the guide rail slider 56 and the nut seat 6 to slide synchronously. The guide rail slider 56 slides on the surface of the guide rail 14, and the sliding of the nut seat 6 causes the sensor mounting plate 7 to slide. As the sensor mounting plate 7 slides, the piston rod 913 slides synchronously. This causes the piston rod 913 to slide inside the guide sleeve 912 and inside the cylinder liner 914. As the piston rod 913 slides, the glue in the cylinder liner 914 is ejected from the glue outlet 916. The proportion of glue ejected is determined by the diameter of the cylinder liner 914 and the downward pressure distance of the motor. The metering is extremely accurate and stable, and there is no linear increase in glue usage after the screw valve wears out.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Piston metering glue injection device comprising a connection plate (1), characterized in that: A bearing seat (2) is fixedly connected to the bottom of the connecting plate (1), and side sealing plates (3) are fixedly connected to both sides of the bearing seat (2). A fixing plate (4) is fixedly connected to the surface of the side sealing plate (3). The top of the connecting plate (1) is driven by a driving unit (5) to make the nut seat (6) slide. A sensor mounting plate (7) is fixedly connected to one side of the nut seat (6). A glue injection mechanism (9) is provided on one side of the side sealing plate (3). The glue injection mechanism (9) includes: The glue injection assembly (91) includes a cylinder liner fixing plate (911) installed on one side of the side sealing plate (3). A bearing plate (918) is fixedly connected to one side of the cylinder liner fixing plate (911). A guide sleeve (912) is fixedly connected inside the bearing plate (918). A piston rod (913) is slidably connected inside the guide sleeve (912). One end of the piston rod (913) is fixedly connected to one side of the sensor mounting plate (7). A cylinder liner (914) is installed inside the cylinder liner fixing plate (911). The inner surface of the cylinder liner (914) is slidably connected to the surface of the piston rod (913). A manifold plate (915) is fixedly connected to the other side of the cylinder liner fixing plate (911). A glue nozzle (916) is installed at the bottom of the manifold plate (915). Glue injection adapters (917) are installed on both sides of the manifold plate (915). A pneumatic assembly (92) is disposed on one side of the manifold (915).

2. The piston metering dispensing device of claim 1, wherein: The pneumatic assembly (92) includes a pneumatic piston plate (921) installed on one side of the manifold (915). A pneumatic plate (922) is fixedly connected to one side of the pneumatic piston plate (921). A pressure sensor (923) is installed on one side of the pneumatic plate (922). Baffles (924) are fixedly connected to both sides of the pneumatic plate (922). Air connectors (925) are installed on both sides of the baffles (924). A glue-absorbing pneumatic piston (926) and a glue-injecting pneumatic piston (927) are installed inside the pneumatic piston plate (921). Compression springs (928) are sleeved on the surfaces of both the glue-absorbing pneumatic piston (926) and the glue-injecting pneumatic piston (927).

3. The piston metering dispensing device of claim 2, wherein: A first adhesive film (10) is provided between the manifold (915) and the pneumatic piston plate (921), and a second adhesive film (11) is provided between the pneumatic piston plate (921) and the pneumatic plate (922).

4. The piston metering dispensing device of claim 1, wherein: A viewing window (12) is installed on the surface of the support plate (918), and a silencer (13) is installed on one side of the fixing plate (4).

5. The piston-type metering dispensing device according to claim 1, characterized in that: The drive unit (5) includes a drive motor (51) mounted on the top of the connecting plate (1). One end of the output shaft of the drive motor (51) is fixedly connected to a synchronous pulley (52) via a coupling. The surface of the synchronous pulley (52) is connected to a transmission pulley (54) via a synchronous belt (53). A lead screw (55) is fixedly connected inside the transmission pulley (54). A guide rail slider (56) is threadedly connected to the surface of the lead screw (55). One side of the guide rail slider (56) is fixedly connected to one side of the nut seat (6).

6. The piston-type metering dispensing device according to claim 5, characterized in that: The bearing seat (2) is equipped with a symmetrical guide rail (14) at its bottom. The surface of the guide rail (14) is slidably connected to the inside of the guide rail slider (56). A guide rail mounting plate (15) is installed on the rear side of the bearing seat (2). A bottom sealing plate (8) is installed on the bottom of the guide rail mounting plate (15).

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