Screw injection valve

Abstract

The utility model relates to the technical field of injection valves, and particularly discloses a screw injection valve, which comprises an injection valve body, a screw rod and a screw rod, the charging barrel is provided with a material storage cavity; the screw feeding assembly is used for conveying the materials sent out by the charging barrel to the nozzle under pressure; the sliding firing pin is located above the nozzle, and the sliding firing pin and the injection valve body are arranged in an up-down sliding mode; and the linear reciprocating driving module is used for driving the sliding firing pin to slide up and down relative to the injection valve body so as to open or block the nozzle. The screw injection valve can solve the problems that an existing injection valve is short in service life, and a nozzle is prone to being blocked through cold welding.

Description

Technical Field

[0001] The utility model relates to the technical field of injection valves, in particular to a screw injection valve. Background Art

[0002] Existing injection valves typically deliver solder paste by driving a sliding striker toward a nozzle, causing the solder paste to be ejected outward through the nozzle. In other words, the primary driving force for the solder paste ejection is the impact force generated by the downward sliding striker. This approach presents the following problems:

[0003] The impact force generated by the sliding striker when it slides downward is used as the power source for solder paste ejection, so the sliding striker must slide at a very high speed. The solder paste contains tin beads, and during the high-speed sliding process of the sliding striker, there will be intense mutual friction between the tin beads and the tin beads:

[0004] On the one hand, severe friction will accelerate the wear of components such as the sliding striker and nozzle, seriously affecting the service life of the injection valve;

[0005] On the other hand, intense friction will generate a large amount of heat. The high temperature causes the tin beads in the solder paste to weld to the nozzle surface before reaching the melting point, forming solder joints (this situation is commonly known as "cold welding"), which eventually clogs the nozzle.

[0006] Therefore, it is necessary to improve the existing injection valve to solve the problems of short service life and easy cold welding and nozzle clogging.

[0007] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0008] One purpose of the utility model is to provide a screw injection valve that can effectively solve the problems of the existing injection valves having a short service life and being prone to cold welding and clogging of the nozzle.

[0009] To achieve the above objectives, the present invention provides a screw injection valve, comprising:

[0010] an injection valve body, wherein the injection valve body is provided with a nozzle;

[0011] A barrel, wherein the barrel is provided with a material storage cavity;

[0012] A screw feeding assembly, which is used to convey the material sent out from the barrel to the nozzle under pressure;

[0013] a sliding striker, the sliding striker being located above the nozzle and slidingly arranged up and down with the injection valve body;

[0014] A linear reciprocating drive module is used to drive the sliding striker to slide up and down relative to the injection valve body, thereby opening or blocking the nozzle.

[0015] Optionally, the linear reciprocating drive module includes:

[0016] a spring, the spring abutting against the sliding striker and used to drive the sliding striker to slide upward to open the nozzle;

[0017] A direct drive unit is located above the sliding striker and is used to drive the sliding striker to slide downward to block the nozzle.

[0018] Optionally, the direct drive unit is a piezoelectric drive.

[0019] Optionally, the injection valve body includes:

[0020] a feeding channel, one end of which is connected to the barrel;

[0021] A feeding channel, one end of which is connected to the nozzle, and a middle portion of which is connected to the other end of the feed channel.

[0022] Optionally, the screw feeding assembly includes:

[0023] Rotary drive mechanism;

[0024] A feeding screw, one end of which is connected to the driving end of the rotary drive mechanism, and the other end of which extends into the feeding channel.

[0025] Optionally, the feeding channel is arranged to be inclined downward toward the direction close to the nozzle.

[0026] Optionally, the injection valve body is further provided with a cleaning chamber for communicating with a vacuuming device, and a cleaning port communicating with the cleaning chamber to an outlet of the nozzle.

[0027] Optionally, a detachable joint is provided between the barrel and the injection valve body.

[0028] The beneficial effect of the utility model is to provide a screw injection valve:

[0029] (1) When spraying: First, the linear reciprocating drive module drives the sliding striker to slide upward, and the nozzle is in an open state; then, the screw feeding assembly applies pressure to the material sent out of the barrel, so that the material sent out of the barrel moves to the nozzle at a certain speed and is sprayed outward through the nozzle;

[0030] (2) When the spraying is finished: the linear reciprocating drive module drives the sliding striker to slide downward and block the nozzle, and the nozzle is in a closed state, thereby limiting the material from being sprayed outward.

[0031] In the above process, the sliding striker is mainly used to seal the nozzle, and the power source for the material to be ejected outward is the screw feeding assembly. Therefore, the sliding striker does not need to slide at high speed and hit the nozzle, which greatly improves the sliding wear and sliding heat. Therefore, it can ensure that the rubber has sufficient injection speed and solve the problems of short service life of the existing injection valve and easy cold welding and clogging of the nozzle.

[0032] Furthermore, during the rotation process, the feed screw not only provides power for material transportation, but also stirs the material, ensuring uniform mixing of the material, thereby improving the consistency of the material viscosity and solid content. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 A schematic structural diagram of a screw injection valve provided in an embodiment;

[0035] Figure 2 for Figure 1 Schematic cross-section of the middle section AA.

[0036] In the picture:

[0037] 1. Injection valve body; 101. Nozzle; 102. Feed channel; 103. Feed channel; 104. Cleaning chamber; 105. Cleaning port;

[0038] 2. Barrel;

[0039] 3. Screw feeding assembly; 301. Rotary drive mechanism; 302. Feeding screw;

[0040] 4. Sliding firing pin;

[0041] 5. Linear reciprocating drive module; 501. Spring; 502. Direct drive unit;

[0042] 6. Detachable connector. DETAILED DESCRIPTION

[0043] References to "embodiments" in this utility model mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the utility model. The appearance of the term "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or relevance to other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the various embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0044] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0045] In the description of this utility model, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0046] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0047] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0048] Consistent with the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0049] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present invention.

[0050] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the technical field of the present invention, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0051] The utility model provides a screw injection valve, which is suitable for application scenarios of injecting materials such as solder paste, and can solve the problems of short service life of existing injection valves and easy blockage of nozzles due to cold welding.

[0052] See also Figure 1 In this embodiment, the screw injection valve includes an injection valve body 1, a barrel 2, a screw feeding assembly 3, a sliding striker 4, and a linear reciprocating drive module 5.

[0053] The injection valve body 1 is provided with a nozzle 101; the barrel 2 is provided with a storage chamber; the screw feeding assembly 3 is used to convey the material sent out of the barrel 2 to the nozzle 101 under pressure; the sliding striker 4 is located above the nozzle 101 and is arranged to slide up and down with the injection valve body 1; the linear reciprocating drive module 5 is used to drive the sliding striker 4 to slide up and down relative to the injection valve body 1, thereby opening or blocking the nozzle 101.

[0054] The screw injection valve provided by the utility model:

[0055] (1) When spraying: First, the linear reciprocating drive module 5 drives the sliding striker 4 to slide upward, and the nozzle 101 is in an open state; then, the screw feeding assembly 3 applies pressure to the material delivered by the barrel 2, so that the material delivered by the barrel 2 moves to the nozzle 101 at a certain speed and is sprayed outward through the nozzle 101;

[0056] (2) When the spraying is finished: the linear reciprocating drive module 5 drives the sliding striker 4 to slide downward and block the nozzle 101, and the nozzle 101 is in a closed state, thereby limiting the material from being sprayed outward.

[0057] In the above process, the sliding striker 4 is mainly used to block the nozzle 101, and the power source for the material to be ejected outward is the screw feeding assembly 3. Therefore, the sliding striker 4 does not need to slide at high speed and hit the nozzle 101, which greatly improves the sliding wear and sliding heat. Therefore, it can ensure that the rubber has sufficient injection speed and solve the problem that the existing injection valve has a short service life and is easy to cold weld and block the nozzle 101.

[0058] Furthermore, during the rotation process, the feed screw 302 not only provides power for material transportation, but also stirs the material, ensuring uniform mixing of the material, thereby improving the consistency of the material viscosity and solid content.

[0059] Optionally, the linear reciprocating drive module 5 includes a spring 501 and a direct drive unit 502. The spring 501 abuts against the sliding striker 4, and is used to drive the sliding striker 4 to slide upward to open the nozzle 101; the direct drive unit 502 is located above the sliding striker 4, and is used to drive the sliding striker 4 to slide downward to block the nozzle 101.

[0060] The screw injection valve provided by the present invention: when spraying, the direct drive unit 502 is deformed upward, the spring 501 drives the sliding striker 4 to slide upward, and the nozzle 101 is in an open state; when spraying is finished: the direct drive unit 502 is deformed downward, and pushes the sliding striker 4 to slide downward, and the nozzle 101 enters a closed state.

[0061] Optionally, the direct drive unit 502 is a piezoelectric actuator. A piezoelectric actuator is a device that uses the piezoelectric effect to achieve precise displacement control. Piezoelectric materials undergo dimensional changes (usually contraction or expansion) when voltage is applied. This property can be used to generate tiny forces and displacements, thereby driving or controlling mechanical devices.

[0062] A piezoelectric actuator typically consists of a piezoelectric ceramic, metal electrodes, a preload mechanism, and other auxiliary components. When voltage is applied to the piezoelectric ceramic's electrodes, the piezoelectric ceramic produces a tiny displacement. Precise displacement control can be achieved by controlling the magnitude and polarity of the voltage.

[0063] The injection valve body 1 further includes a feed channel 102 and a feeding channel 103. One end of the feed channel 102 is connected to the barrel 2; one end of the feeding channel 103 is connected to the nozzle 101, and the middle of the feeding channel 103 is connected to the other end of the feed channel 102.

[0064] The screw feeding assembly 3 includes a rotary drive mechanism 301 and a feeding screw 302. One end of the feeding screw 302 is connected to the driving end of the rotary drive mechanism 301, and the other end extends into the feeding channel 103.

[0065] By inputting compressed gas downward from the top surface of the barrel 2, the material in the barrel 2 can be sent downward into the feed channel 102 and then into the feeding channel 103; the rotary drive mechanism 301 drives the feeding screw 302 to rotate, so that the material in the feed channel 102 can be pressurized and sent out to the nozzle 101.

[0066] Optionally, the feeding channel 103 is arranged to be inclined downward toward the direction close to the nozzle 101. This is beneficial for utilizing the gravity of the material to accelerate the flow speed of the material and reduce the conveying resistance of the material.

[0067] In this embodiment, see Figure 2 The injection valve body 1 is further provided with a cleaning chamber 104 for connecting to a vacuuming device, and a cleaning port 105 connecting the cleaning chamber 104 to the outlet of the nozzle 101 .

[0068] After the screw injection valve is used, the sliding striker 4 blocks the upper nozzle 101 , and then the vacuum equipment vacuums the cleaning chamber 104 , and the residual glue at the nozzle 101 is sucked away through the cleaning port 105 , thereby completing the cleaning operation at the nozzle 101 .

[0069] Optionally, a detachable joint 6 is provided between the barrel 2 and the injection valve body 1. By replacing the detachable joint 6 of different types, barrels 2 of different types and sizes can be connected to meet different production requirements.

[0070] In summary, the screw injection valve provided in this embodiment has the following advantages:

[0071] ① Extending the service life: Since the sliding striker 4 does not need to slide at high speed and strike the nozzle 101, wear and heat are greatly reduced, thereby extending the service life of the injection valve.

[0072] ② Reduce cold soldering blockage: By reducing the collision between the sliding striker 4 and the nozzle 101, the heat generated by friction is reduced, thereby reducing the risk of solder paste cold soldering blocking the nozzle 101.

[0073] ③ Improve the consistency of injection: The screw feeding component 3 stirs the material while conveying it, ensuring the uniformity of the material viscosity and solid content, thereby improving the consistency of injection.

[0074] ④ Precise injection control: A linear reciprocating drive module 5 including a spring 501 and a piezoelectric driver is used to precisely control the up and down sliding of the sliding striker 4 to achieve precise opening and closing of the nozzle 101.

[0075] ⑤ Easy to clean and maintain: A cleaning chamber 104 and a cleaning port 105 are provided to facilitate vacuuming equipment to clean residual glue at the nozzle 101, making maintenance easy.

[0076] ⑥ Optimize material flow: The feeding channel 103 is tilted downward, which is beneficial to the gravity of the material, reduces the conveying resistance, and increases the material flow speed.

[0077] It should be noted that the linear drive mechanism mentioned in the present invention may be a pneumatic cylinder, a hydraulic cylinder, an electric cylinder, or a motor-screw linear module, and the rotary drive mechanism mentioned in the present invention may be a brushed motor, a brushless motor, or a rotary cylinder. The present invention does not limit the specific structural forms of the linear drive mechanism and the rotary drive mechanism.

[0078] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A screw injection valve, characterized in that: include: An injection valve body (1), wherein the injection valve body (1) is provided with a nozzle (101); A barrel (2), wherein the barrel (2) is provided with a material storage cavity; A screw feeding assembly (3), the screw feeding assembly (3) is used to convey the material delivered from the barrel (2) to the nozzle (101) under pressure; A sliding striker (4), the sliding striker (4) being located above the nozzle (101) and being arranged to slide up and down with the injection valve body (1); A linear reciprocating drive module (5) is used to drive the sliding striker (4) to slide up and down relative to the injection valve body (1), thereby opening or blocking the nozzle (101).

2. The screw injection valve according to claim 1, characterized in that The linear reciprocating drive module (5) comprises: a spring (501), the spring (501) abutting against the sliding striker (4) and used to drive the sliding striker (4) to slide upward to open the nozzle (101); A direct drive unit (502), the direct drive unit (502) is located above the sliding striker (4), and is used to drive the sliding striker (4) to slide downward to block the nozzle (101).

3. The screw injection valve according to claim 2, characterized in that: The direct drive unit (502) is a piezoelectric drive.

4. The screw injection valve according to claim 1, characterized in that The injection valve body (1) comprises: A feeding channel (102), one end of which is connected to the barrel (2); A feeding channel (103), one end of the feeding channel (103) is connected to the nozzle (101), and the middle position of the feeding channel (103) is connected to the other end of the feed channel (102).

5. The screw injection valve according to claim 4, characterized in that: The screw feeding assembly (3) comprises: Rotation drive mechanism (301); A feeding screw (302), one end of which is connected to the driving end of the rotary drive mechanism (301), and the other end of which extends into the feeding channel (103).

6. The screw injection valve according to claim 4, characterized in that The feeding channel (103) is arranged to be inclined downward in a direction close to the nozzle (101).

7. The screw injection valve according to claim 1, characterized in that The injection valve body (1) is further provided with a cleaning chamber (104) for connecting to a vacuum device, and a cleaning port (105) connecting the cleaning chamber (104) to the outlet of the nozzle (101).

8. The screw injection valve according to claim 1, characterized in that A detachable joint (6) is provided between the barrel (2) and the injection valve body (1).

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