High viscosity large capacity two component glue control valve

Abstract

The utility model discloses a kind of high viscosity large capacity two-component glue control valve, belong to fluid control equipment technical field.The valve includes a valve body, two symmetrical branch passages and a main passage are equipped in valve body and communicate with two thereof.Every branch passage is equipped with a piston piece consisting of piston and piston core, and branch passage includes the first space containing piston and the second space containing piston core.Valve body is equipped with the first pressurizing port located in the upper portion of first space, the second pressurizing port of bottom and the glue injection port located in the lateral wall of second space.By alternately applying pressure to two pressurizing ports, piston piece is driven to move up and down, to realize the automatic opening and closing of glue injection port and the accurate pushing of glue.The utility model is compact in structure, accurate in control, effectively solves the problems of complex structure, high viscosity glue dripping and the like of traditional two-component valve, and is suitable for the delivery of large capacity high viscosity glue.

Description

Technical Field

[0001] This utility model relates to the field of fluid control equipment technology, and in particular to a high-viscosity, large-capacity two-component adhesive control valve. Background Technology

[0002] Two-component adhesives, such as epoxy resins and polyurethanes, are widely used in electronic packaging, automotive manufacturing, and construction due to their high-strength bonding properties. These adhesives typically require the two different components (e.g., component A and component B) to be mixed in precise proportions before curing. Therefore, the valve controlling the dispensing of the two-component adhesive is a core component of the dispensing system.

[0003] Existing two-component adhesive control valves typically have the following problems:

[0004] Complex structure: Traditional control valves often use two independent metering pumps or valve bodies to control adhesives A and B separately, and then connect them to a static mixing pipe through external pipelines. The entire system has many components, is bulky, and has a high cost.

[0005] Cumbersome material control: The process of injecting (adding) glue usually requires additional feed valves and control systems, which increases the complexity of the system and potential points of failure.

[0006] Poor control of high-viscosity media: For high-viscosity adhesives, traditional piston valves that rely on spring return have insufficient suction force during retraction, easily causing dripping or stringing at the dispensing nozzle, affecting dispensing accuracy. Furthermore, spring fatigue failure can also shorten the equipment's lifespan.

[0007] Therefore, developing a novel two-component adhesive control valve with high structural integration, precise control, and strong adaptability to high-viscosity adhesives is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a "high viscosity, large capacity two-component adhesive control valve" that is compact in structure, precise in control, and integrates the functions of dispensing and injecting adhesive, so as to solve the problems of complex structure, inconvenient control, and easy leakage of high viscosity adhesive in the prior art.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A high-viscosity, high-capacity two-component adhesive control valve includes: a valve body; the valve body has two branch channels and a main channel communicating with the two branch channels; each branch channel has a piston component, the piston component including a piston and a movable core fixedly connected to one end of the piston; wherein, the branch channel includes a first space for accommodating the vertical movement of the piston and a second space for accommodating the vertical movement of the movable core, and the second space is communicating with the main channel; the valve body also has: a first pressure port communicating with the first space; a second pressure port communicating with the first space; and an adhesive injection port communicating with the second space.

[0011] In a preferred embodiment, the first pressurization port is located at the upper part of the first space and is used to apply downward pressure to the piston; the second pressurization port is located at the bottom of the first space and is used to apply upward pressure to the piston.

[0012] In a preferred embodiment, the injection port is disposed on the side wall of the second space; when the piston moves upward to the top position, the lower end face of the piston core is higher than the lower edge of the injection port, so that the injection port is connected to the second space.

[0013] In a preferred embodiment, when the piston is pressed downward, the sidewall of the piston core closes the injection port.

[0014] In a preferred embodiment, the outer periphery of the piston slides in contact with the inner wall of the first space; the outer diameter of the piston core is smaller than the outer diameter of the piston, and the outer periphery of the piston core slides in contact with the inner wall of the second space.

[0015] In a preferred embodiment, the two branch channels are symmetrically arranged within the valve body.

[0016] In a preferred embodiment, the other end of the active core is a free end, which is used to push the adhesive from the second space to the main channel.

[0017] The beneficial effects of this utility model are as follows:

[0018] Highly integrated structure: The two glue paths are integrated into one valve body, and the reciprocating motion of the movable core is cleverly used to realize the automatic opening and closing of the glue inlet, eliminating the need for an additional feed valve, making the overall structure more compact, reducing manufacturing costs and failure rate.

[0019] Bidirectional precision drive: By setting first and second pressure ports, the piston can be actively pushed down and pulled up using air or hydraulic pressure. Compared with spring return, bidirectional drive provides more precise control over force and speed, especially during pull-up and suction, generating sufficient negative pressure to effectively prevent dripping and stringing of high-viscosity adhesives.

[0020] Simplified operation process: The glue injection and dispensing actions are integrated into a reciprocating cycle. A complete "glue injection-dispensing" cycle can be completed by switching the pressure of the two pressure ports, which simplifies the control logic and improves production efficiency.

[0021] Wide applicability: The symmetrical structural design ensures the consistency of the dispensing volume of both A and B adhesives, while the powerful bidirectional driving force enables it to easily handle high-viscosity, large-capacity adhesive delivery tasks. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0023] Figure 2 This is a cross-sectional view of one embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Please see Figure 1 as well as Figure 2 This embodiment provides a high-viscosity, high-capacity two-component adhesive control valve, which mainly consists of an integral valve body 1. The valve body 1 has two identical branch channels 2 precisely machined inside, used to respectively accommodate and control two different adhesive components (e.g., adhesive A and adhesive B). To ensure uniform dispensing and accurate proportions, these two branch channels 2 are preferably symmetrically arranged within the valve body 1. At the lower end of the valve body 1, a main channel 3 is provided, and the outlets of both branch channels 2 are connected to this main channel 3, allowing the adhesive dispensed from the two branch channels 2 to converge within the main channel 3 and flow out from its outlet for subsequent mixing in a static mixing tube.

[0029] Each branch channel 2 houses a core moving component—a piston 4. The piston 4 consists of a piston 41 and a piston core 42. One end of the piston core 42 is firmly fixed to the bottom of the piston 41, forming an integral T-shaped or stepped shaft structure.

[0030] To accommodate the movement of the piston 4, each branch channel 2 is designed as two spaces with different inner diameters. The upper space is a first space 21 for accommodating the reciprocating motion of the piston 41. The inner diameter of this space forms a precise sliding fit with the outer diameter of the piston 41 to ensure airtightness or liquid tightness, allowing pressure to be effectively applied to the piston 41. The lower space is a second space 22 for accommodating the reciprocating motion of the piston core 42. This space has a smaller inner diameter and forms a sliding fit with the outer diameter of the piston core 42, serving a guiding function. The outer diameter of the piston core 42 is smaller than the outer diameter of the piston 41. The bottom of the second space 22 is directly connected to the main channel 3.

[0031] The key innovation of this invention lies in its unique drive and feeding structure. Two pressure ports are provided on the valve body 1 for each first space 21. The first pressure port 6 is located directly above the first space 21. When high-pressure gas or liquid is introduced through this port, the pressure acts on the upper surface of the piston 41, driving the entire piston 4 downwards to perform the dispensing action. The second pressure port 7 is cleverly located at the bottom of the side wall of the first space 21. When high-pressure gas or liquid is introduced through this port, the pressure acts on the lower surface of the piston 41, driving the entire piston 4 upwards to perform the return stroke and dispensing preparation actions. This dual-pressure port design achieves active and precise control of the bidirectional movement of the piston 4.

[0032] In addition, each branch channel 2 is provided with a glue injection port 5 on the valve body 1. This glue injection port 5 is located on the side wall of the second space 22. Its position is precisely calculated so that when the piston 4 moves upward to its highest position under the action of the second pressure port 7, the free end (i.e., the lower end face) of the piston core 42 completely passes over the glue injection port 5, making the glue injection port 5 fully connected to the interior of the second space 22. At this time, glue can be injected into the second space 22 through the glue injection port 5. When the piston 4 moves downward under the action of the first pressure port 6, the sturdy side wall of the piston core 42 slides over and completely seals the glue injection port 5, preventing glue leakage from the port, and subsequently pushing the glue already injected into the second space 22 downward. The free end of the piston core 42 is the actuating end face that pushes the glue, precisely pushing the glue from the second space 22 into the main channel 3.

[0033] The workflow is detailed below:

[0034] During the glue injection stage: Compressed air or hydraulic oil is introduced into the second pressure port 7. The pressure pushes the piston 41 upward, and drives the movable core 42 to move upward to the top position simultaneously. At this time, the movable core 42 opens the glue injection port 5, and the external glue supply system injects a certain amount of glue into the empty second space 22 through the glue injection port 5.

[0035] Dispensing stage: Pressure supply to the second pressure port 7 is stopped, and pressure is introduced into the first pressure port 6. The pressure pushes the piston 41 downward, causing the movable core 42 to move downward synchronously. During the downward movement of the movable core 42, its sidewall first seals the dispensing port 5, cutting off the feeding passage. Subsequently, the free end face of the movable core 42 acts as a push rod, pushing the glue in the second space 22 into the main channel 3 through the outlet of the branch channel 2. The two branch channels 2 perform this action synchronously, and the two components of glue converge in the main channel 3 and are pushed out of the valve body.

[0036] Backflow and Circulation: After dispensing, the pressure at the first pressure port 6 is cut off, and pressure is reintroduced into the second pressure port 7, causing the piston 4 to return quickly. The upward movement of the piston 4 creates a certain negative pressure in the second space 22, which acts as a backflow mechanism, effectively preventing leakage of residual glue from the dispensing port. After the piston 4 returns to the top, the glue inlet 5 reopens, preparing for the next glue dispensing, thus completing a full work cycle.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A control valve for high-viscosity, high-capacity two-component adhesive, characterized in that, include: A valve body (1); The valve body (1) is provided with two branch channels (2) and a main channel (3) that communicates with the two branch channels (2); Each of the branch channels (2) is provided with a piston component (4), the piston component (4) including a piston (41) and a movable core (42) fixedly connected to the piston (41) at one end; The branch channel (2) includes a first space (21) for accommodating the piston (41) moving up and down, and a second space (22) for accommodating the piston core (42) moving up and down, and the second space (22) is connected to the main channel (3); The valve body (1) is also provided with a first pressurization port (6) that communicates with the first space (21); A second pressurization port (7) connected to the first space (21); And a glue inlet (5) that communicates with the second space (22).

2. The high-viscosity, large-capacity two-component adhesive control valve according to claim 1, characterized in that, The first pressurization port (6) is located at the upper part of the first space (21) and is used to apply downward pressure to the piston (41); the second pressurization port (7) is located at the bottom of the first space (21) and is used to apply upward pressure to the piston (41).

3. The high-viscosity, high-capacity two-component adhesive control valve according to claim 1, characterized in that, The glue injection port (5) is located on the side wall of the second space (22); when the piston (4) moves upward to the top position, the lower end face of the piston core (42) is higher than the lower edge of the glue injection port (5), so that the glue injection port (5) is connected to the second space (22).

4. The high-viscosity, large-capacity two-component adhesive control valve according to claim 3, characterized in that, When the piston (4) is pressed downward, the side wall of the piston core (42) closes the glue injection port (5).

5. The high-viscosity, high-capacity two-component adhesive control valve according to claim 1, characterized in that, The outer periphery of the piston (41) slides in fit with the inner wall of the first space (21); the outer diameter of the movable core (42) is smaller than the outer diameter of the piston (41), and the outer periphery of the movable core (42) slides in fit with the inner wall of the second space (22).

6. The high-viscosity, large-capacity two-component adhesive control valve according to claim 1, characterized in that, The two branch channels (2) are symmetrically arranged inside the valve body (1).

7. The high-viscosity, large-capacity two-component adhesive control valve according to claim 1, characterized in that, The other end of the active core (42) is a free end, which is used to push the glue from the second space (22) to the main channel (3).

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