Glue printing head for glue dispensing valve and glue dispensing valve with glue printing head

Abstract

The utility model discloses a glue printing head for a glue dispensing valve and the glue dispensing valve with the glue printing head, the glue printing head for the glue dispensing valve comprises a runner seat and an offset printing layer, and the runner seat is provided with a glue inlet for receiving glue extruded by a valve body of the glue dispensing valve; the offset printing layer is made of a material with a microporous structure and is arranged on the bottom surface of the runner seat; wherein a plurality of flow channels are arranged in the flow channel seat, the plurality of flow channels are arranged in the circumferential direction of the glue inlet at intervals, the upper end of each flow channel is communicated with the glue inlet, the lower end of each flow channel is communicated with the offset printing layer, and the glue is dispersed and drained to the offset printing layer through the plurality of flow channels. According to the glue printing head provided by the embodiment of the utility model, the coverage area of point glue coating is large, and the efficiency of large-area uniform glue coating operation is improved.

Description

Technical Field

[0001] The utility model relates to a dispensing valve, in particular to an ink printing head for a dispensing valve and a dispensing valve with the same. Background Art

[0002] A dispensing valve is a high-precision fluid control device, mainly used for accurately controlling the dispensing amount and dispensing speed of liquids such as glue. In various industrial applications, the dispensing valve cooperates with a glue supply device to achieve accurate dot coating of fluid media, and is widely used in fields such as optics, optoelectronics, automotive, and electronics manufacturing.

[0003] The dispensing valves in the related art mainly include a valve body and a dispensing head. The valve body can be connected to a glue supply device and pump out the colloid so that it sprays out from the dispensing head. The dispensing head is usually a nozzle-shaped or needle-shaped structural member. When performing dot coating, the path width of the dot coating is narrow and the coverage area is small. This dot coating method is inefficient and has poor dot coating uniformity when the dispensing path and area requirements are large. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this purpose, the purpose of the utility model is to provide an ink printing head for a dispensing valve and a dispensing valve with the same.

[0005] To achieve the above object, according to an embodiment of the utility model, the ink printing head for a dispensing valve includes:

[0006] A runner seat, the runner seat is provided with a glue inlet for receiving the colloid extruded by the valve body of the dispensing valve;

[0007] An ink printing layer, the ink printing layer is made of a material with a microporous structure, and the ink printing layer is arranged on the bottom surface of the runner seat;

[0008] Wherein, a plurality of runners are arranged in the runner seat, the plurality of runners are circumferentially spaced around the glue inlet, and the upper end of each runner is communicated with the glue inlet, and the lower end of each runner is communicated with the ink printing layer, so as to disperse and guide the colloid to the ink printing layer through the plurality of runners.

[0009] According to the glue printing head for a dispensing valve provided by an embodiment of the present utility model, by arranging a plurality of flow channels around the glue inlet in the flow channel seat, the glue is evenly dispersed to the microporous structure glue printing layer at the bottom. This structural design greatly expands the coverage area of the dot coating glue, thereby improving the efficiency of large-area uniform glue coating operation. The design of the plurality of flow channels enables the supplied glue to be drained to the entire glue printing layer in a uniformly dispersed manner, avoiding the phenomenon of glue concentration in local areas and ensuring the uniformity of glue coating. The glue printing layer with a microporous structure can not only effectively control the penetration flow rate of the glue, but also adopt glue printing layers with different porosities according to different application requirements to meet the requirements of different media and dot coating processes.

[0010] In addition, the glue printing head for a dispensing valve according to the above embodiment of the present utility model may further have the following additional technical features:

[0011] According to an embodiment of the present utility model, the flow channel seat includes:

[0012] A diversion seat, and the glue inlet is arranged on the diversion seat;

[0013] A shunt seat, the shunt seat is arranged at the bottom of the diversion seat, and a glue cavity is defined between the shunt seat and the diversion seat;

[0014] A plurality of diversion holes are arranged in the diversion seat, the plurality of diversion holes are arranged at intervals in the circumferential direction around the glue inlet, the upper end of each diversion hole is communicated with the glue inlet, and the lower end of each diversion hole is communicated with the glue cavity;

[0015] A plurality of shunt holes are arranged in the shunt seat, the plurality of shunt holes are dispersed in the area corresponding to the glue cavity, the upper end of each shunt hole is communicated with the glue cavity, and the lower end of each shunt hole is communicated with the glue printing layer.

[0016] According to an embodiment of the present utility model, the diversion hole is formed as an inclined hole that gradually offsets outward in the direction from top to bottom, and the shunt hole is formed as a straight hole extending in the up and down direction.

[0017] According to an embodiment of the present utility model, the number of the shunt holes is greater than the number of the diversion holes.

[0018] According to an embodiment of the present utility model, the shape of the glue cavity is consistent with the shape of the glue printing layer.

[0019] According to an embodiment of the present utility model, a groove is provided on the bottom surface of the diversion seat, and the shunt seat is tightly sealed on the bottom surface of the diversion seat to seal the groove to form the glue cavity.

[0020] According to an embodiment of the present utility model, a printing table portion adapted to the shape of the offset printing layer is provided on the bottom surface of the flow dividing seat. An installation groove is provided on the printing table portion, and the offset printing layer is arranged in the installation groove and partially protrudes from the bottom surface of the printing table portion.

[0021] According to an embodiment of the present utility model, an annular sealing groove is provided on the bottom surface of the flow dividing seat. The annular sealing groove is located outside the glue cavity, and a sealing ring is provided in the annular sealing groove;

[0022] The flow dividing seat and the flow guiding seat are locked and fixed by fasteners, and the sealing ring is compressed, so as to form a sealed state between the flow dividing seat and the flow guiding seat.

[0023] According to an embodiment of the present utility model, the shape and size of the offset printing layer are consistent with the pattern to be printed.

[0024] On the other hand, the dispensing valve according to an embodiment of the present utility model includes:

[0025] A valve body having a glue outlet for extruding the glue;

[0026] The printing glue head for the dispensing valve as described above is arranged on the valve body, and the glue inlet is communicated with the glue outlet.

[0027] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0029] Figure 1 is a schematic structural view of a printing glue head for a dispensing valve according to an embodiment of the present utility model from one perspective;

[0030] Figure 2 is a schematic structural view of a printing glue head for a dispensing valve according to an embodiment of the present utility model from another perspective;

[0031] Figure 3 is an exploded view of a printing glue head for a dispensing valve according to an embodiment of the present utility model from one perspective;

[0032] Figure 4It is an exploded view of the glue printing head for the dispensing valve from another perspective in an embodiment of the present utility model;

[0033] Figure 5 It is a schematic structural diagram of the diversion seat in the glue printing head for the dispensing valve in an embodiment of the present utility model;

[0034] Figure 6 It is a schematic structural diagram of the flow splitting seat in the glue printing head for the dispensing valve in an embodiment of the present utility model;

[0035] Figure 7 It is a partial exploded view of the glue printing head for the dispensing valve in an embodiment of the present utility model.

[0036] Reference numerals:

[0037] 10. Flow channel seat;

[0038] 101. Diversion seat;

[0039] H101. Glue inlet;

[0040] H102. Diversion hole;

[0041] H103. Annular sealing groove;

[0042] P10. Glue cavity;

[0043] 102. Flow splitting seat;

[0044] 1021. Printing table part;

[0045] H104. Flow splitting hole;

[0046] 103. Sealing ring;

[0047] 20. Glue printing layer.

[0048] The realization, functional features and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0049] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0050] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0052] In the present utility model, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0053] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0054] The following will describe in detail the printing glue head for a dispensing valve according to an embodiment of the present utility model with reference to the drawings.

[0055] Refer to Figures 1 to 7 As shown, the printing glue head for a dispensing valve according to an embodiment of the present utility model includes a flow channel seat 10 and a glue printing layer 20.

[0056] Specifically, the runner base 10 is provided with a glue inlet H101 for receiving the glue extruded from the dispensing valve body. The runner base 10 is the main component of the printing glue head, and the glue inlet H101 can be arranged at positions such as the top surface or side surface of the runner base 10 for receiving the glue extruded from the dispensing valve body. In specific applications, the runner base 10 is connected to the dispensing valve body to ensure that the glue inlet H101 on the runner base 10 is communicated with the glue outlet of the dispensing valve body. In this way, the glue extruded from the dispensing valve body can enter the glue inlet H101 through the glue outlet and enter the runner base 10 from the glue inlet H101.

[0057] The printing glue layer 20 is made of a material with a microporous structure, and the printing glue layer 20 is arranged on the bottom surface of the runner base 10. The printing glue layer 20 can be made of, but not limited to, sponge, foam material, fiber non-woven fabric, polymer gel material, etc. The design of the porous structure endows it with "sponge-like" absorption and slow-release characteristics, which can not only quickly and evenly absorb the glue, but also slowly and evenly release the glue to the surface of the product to be coated through the microporous structure.

[0058] A plurality of runners are arranged in the runner base 10. The plurality of runners are arranged at intervals around the circumference of the glue inlet H101, and the upper end of each runner is communicated with the glue inlet H101, and the lower end of each runner is communicated with the printing glue layer 20 to disperse and divert the glue to the printing glue layer 20 through the plurality of runners.

[0059] That is to say, inside the runner base 10, a plurality of runners are evenly distributed at intervals along the circumference of the glue inlet H101, and these runners are arranged in a circular or radial pattern. The number and spacing of the runners can be designed according to actual needs. For example, 4 to 12 runners can be used, and the cross-section of the runner can be semi-circular, rectangular or other appropriate shapes.

[0060] The upper end of each runner is communicated with the glue inlet H101, so that the glue from the dispensing valve body can be directly introduced. The lower end of the runner is communicated with the printing glue layer 20 at the bottom, and the outlets at the lower ends of the runners are evenly distributed in the upper surface area of the entire printing glue layer 20. In this way, it is ensured that each runner can directly introduce the diverted glue into the microporous structure of the printing glue layer 20.

[0061] Since the plurality of runners are arranged in a circular or radial pattern and the outlets at the lower ends of the runners are evenly distributed, after the glue is extruded from the dispensing valve body through the glue inlet H101, it will be quickly and evenly diverted to each runner, and then the glue will be dispersed and diverted to each area of the entire printing glue layer 20 through the outlets at the lower ends of the runners. This flow diversion method can effectively avoid the situation of local concentration when the glue enters the printing glue layer 20, ensuring the uniform distribution of the glue throughout the printing glue layer 20.

[0062] According to the printing glue head for a dispensing valve provided by an embodiment of the present utility model, by arranging a plurality of flow channels around the glue inlet H101 in the flow channel seat 10, the glue is evenly dispersed to the microporous structure glue printing layer 20 at the bottom. This structural design greatly expands the coverage area of the dot coating glue, thereby improving the efficiency of large-area uniform glue coating operation. The design of the plurality of flow channels enables the supplied glue to be drained to the entire glue printing layer 20 in a uniformly dispersed manner, avoiding the phenomenon that the glue is concentrated in a local area and ensuring the uniformity of glue coating. The glue printing layer 20 with a microporous structure can not only effectively control the penetration flow rate of the glue, but also adopt glue printing layers 20 with different porosities according to different application requirements to meet the requirements of different media and dot coating processes.

[0063] Referring to Figures 3 to 6 As shown, in some embodiments of the present utility model, the flow channel seat 10 includes a diversion seat 101 and a shunt seat 102. The glue inlet H101 is arranged on the diversion seat 101. Preferably, the glue inlet H101 is arranged on the top surface of the diversion seat 101, which is convenient for assembling and connecting with the dispensing valve body and receiving the glue extruded from the dispensing valve body. The shunt seat 102 is arranged at the bottom of the diversion seat 101, and a glue cavity P10 is defined between the shunt seat 102 and the diversion seat 101. This glue cavity P10 serves as a transfer cavity for the glue.

[0064] A plurality of diversion holes H102 are arranged in the diversion seat 101. The plurality of diversion holes H102 are arranged at intervals around the circumference of the glue inlet H101. The upper end of each diversion hole H102 is communicated with the glue inlet H101, and the lower end of each diversion hole H102 is communicated with the glue cavity P10. That is to say, the glue introduced by the glue inlet H101 can be diverted to the glue cavity P10 through the dispersedly arranged diversion holes H102.

[0065] A plurality of shunt holes H104 are arranged in the shunt seat 102. The plurality of shunt holes H104 are dispersedly arranged in the area corresponding to the glue cavity P10. The upper end of each shunt hole H104 is communicated with the glue cavity P10, and the lower end of each shunt hole H104 is communicated with the glue printing layer 20. That is to say, the glue in the glue cavity P10 can flow into the microporous structure of the glue printing layer 20 through the uniformly distributed shunt holes H104.

[0066] During the dispensing process, the colloid first extrudes from the dispensing valve body and enters the glue inlet H101 at the top of the flow guide seat 101. Since the diameter of the glue inlet H101 is relatively small, the colloid is in a high-speed and high-pressure jet state at this time. Subsequently, the colloid flows through a plurality of flow guide holes H102 evenly distributed around the glue inlet H101 within the flow guide seat 101. During this process, the jet is evenly divided into multiple flows, achieving preliminary dispersion and shunt. The shunted colloid enters the glue cavity P10 at the bottom of the flow guide seat 101. The glue cavity P10 is a diffusion space where the colloid can fully diffuse and re-uniformly distribute. This process is equivalent to correcting and balancing the non-uniformity generated by the upstream shunt. At the same time, the area covered by the colloid is defined to form a shape adapted to the printing layer 20. When the uniformly distributed colloid flows into the plurality of shunt holes H104 distributed dispersedly within the shunt seat 102, it is divided into multiple small fluid streams again and evenly guided to each area of the printing layer 20 at the bottom. The colloid enters the internal microporous structure of the printing layer 20 through the shunt holes H104. Due to the porous characteristics of the printing layer 20 with a high specific surface area, the colloid will uniformly penetrate the entire internal space of the printing layer 20. Finally, the colloid will slowly ooze out from the micropores on the lower surface of the printing layer 20 to achieve uniform large-area printing of the glue.

[0067] In this embodiment, through the double-layer shunt structure of the flow guide seat 101 and the shunt seat 102, the colloid is processed by shunting and uniform diffusion multiple times successively, which not only increases the coverage area of the colloid but also more effectively improves the uniformity of the colloid. In particular, the introduction of the glue cavity P10 provides a space for the colloid to fully diffuse and redistribute, effectively increasing the coverage area and uniformity of the colloid.

[0068] Refer to Figures 5 to 6 As shown, in an embodiment of the present invention, the flow guide holes H102 are formed as inclined holes that gradually shift outward in the direction from top to bottom, and the shunt holes H104 are formed as straight holes extending in the vertical direction. That is, these flow guide holes H102 are distributed in a radial and circumferential manner.

[0069] In this embodiment, the multiple flow guide holes H102 within the flow guide seat 101 adopt an inclined hole structure form. The upper ends of all the flow guide holes H102 are concentrated and surrounded in the area around the glue inlet H101, while the lower ends are distributed in a radial and outward diffusion manner along the radial direction of the glue inlet H101. Correspondingly, the multiple shunt holes H104 within the shunt seat 102 maintain a simple straight hole structure and extend linearly in the vertical direction.

[0070] This combined design with inclined flow guide holes H102 and straight shunt holes H104 first uses the inclined holes to achieve diffusion to increase the coverage area of the colloid. Then, multiple uniformly distributed straight holes are used to evenly shunt the colloid, thereby achieving the effect of increasing the coverage area and ensuring uniform shunt diffusion.

[0071] Preferably, the number of the shunt holes H104 is greater than that of the diversion holes H102. By increasing the number of the shunt holes H104 in the shunt seat 102 to be greater than that of the diversion holes H102, the colloid can be shunted into more small streams of fluid, thereby greatly improving the uniformity and dispersion of the colloid flow when entering the offset printing layer 20.

[0072] Preferably, the shape of the glue cavity P10 is consistent with that of the offset printing layer 20. In Figure 1 the example, the shape of the offset printing layer 20 is U-shaped, and correspondingly, the shape of the glue cavity P10 is also U-shaped. The matching of the shape of the glue cavity P10 with that of the offset printing layer 20 can make the diffusion distribution of the colloid in the forming cavity more reasonable and uniform. If the shape of the forming cavity is inconsistent with that of the offset printing layer 20, it may cause the uneven distribution of the positions of some shunt holes H104, affecting the final uniform coating effect.

[0073] Referring to Figure 4 as shown, in an embodiment of the present invention, a groove is provided on the bottom surface of the diversion seat 101, and the shunt seat 102 is closely attached and sealed to the bottom surface of the diversion seat 101 to seal the groove to form the glue cavity P10.

[0074] That is to say, the shunt seat 102 is closely attached to the bottom surface of the diversion seat 101 to form a seal, so that the inner cavity space of the groove forms a sealed glue cavity P10. With this design, the diversion seat 101 and the shunt seat 102 are used as two independent modules, which can be processed and manufactured separately, and the disassembly and replacement are more convenient and efficient. In addition, by only replacing the diversion seat 101, the requirements for glue cavities P10 with different shapes and sizes can be met, improving the adaptability.

[0075] Referring to Figures 3 to 4 as shown, in an embodiment of the present invention, an annular sealing groove H103 is provided on the bottom surface of the shunt seat 102, the annular sealing groove H103 is located outside the glue cavity P10, and a sealing ring 103 is provided in the annular sealing groove H103. The material of the sealing ring 103 is usually selected from materials with good elasticity and sealing performance, such as silicone rubber, fluororubber, etc.

[0076] The shunt seat 102 and the diversion seat 101 are locked and fixed by fasteners, and the sealing ring 103 is compressed so that a sealed state is formed between the shunt seat 102 and the diversion seat 101.

[0077] When assembling the diversion seat 101 and the shunt seat 102, the top surface of the shunt seat 102 will be close to the bottom surface of the diversion seat 101. At this time, the annular sealing ring 103 is located between the interlayers of the diversion seat 101 and the shunt seat 102. Then, the two shunt seats 102 and the diversion seat 101 are locked and fixed by bolts, screws or other fasteners. During the locking process, the annular sealing ring 103 will be compressed and deformed. Due to the good elasticity of the sealing ring 103 material, a reliable sealing state can be ensured between the shunt seat 102 and the diversion seat 101 after being compressed.

[0078] Referring to Figure 7 As shown, in an embodiment of the present invention, the bottom surface of the shunt seat 102 is provided with an ink printing table portion 1021 adapted to the shape of the offset printing layer 20. The ink printing table portion 1021 is provided with a mounting groove, and the offset printing layer 20 is arranged in the mounting groove and partially protrudes from the bottom surface of the ink printing table portion 1021.

[0079] In this embodiment, by partially embedding the offset printing layer 20 into the mounting groove and making its lower surface protrude from the bottom surface of the ink printing table portion 1021, in this way, the mounting groove plays a role in positioning and installing the offset printing layer 20, which can not only ensure that the installation of the offset printing layer 20 on the shunt seat 102 is more reliable and firm, but also enable the offset printing layer 20 to be accurately docked with the outlet of the shunt hole H104, ensuring the smoothness and uniformity of the colloid flow output. At the same time, it is also convenient to replace the offset printing layer 20 with different porosities according to needs.

[0080] Preferably, the shape and size of the offset printing layer 20 are consistent with the pattern to be printed. That is to say, the shape and size of the offset printing layer 20 are determined according to the actual requirements of dispensing and coating. For example, the dispensing area (i.e., the "pattern to be printed") on the product to be dispensed may be circular, square, U-shaped, oval or other special shapes, then the offset printing layer 20 is also configured with the same shape and size. In this way, the dispensing area can be coated at one time, improving the coating efficiency.

[0081] The dispensing valve according to the embodiment of the present invention includes a valve body and an ink printing head for the dispensing valve as described in the above embodiment. The valve body has a glue outlet for extruding the colloid to extrude the colloid from the glue outlet. The ink printing head is arranged on the valve body, and the glue inlet H101 is communicated with the glue outlet for applying the colloid to the dispensing area of the product to be dispensed.

[0082] According to the dispensing valve provided by the embodiment of the present utility model, it has the above-mentioned printing glue head. By arranging a plurality of flow channels around the glue inlet H101 in the flow channel seat 10, the colloid is evenly dispersed to the microporous structure glue printing layer 20 at the bottom. This structural design greatly expands the coverage area of the dot coating glue, thereby improving the efficiency of the large-area uniform glue coating operation. The design of the plurality of flow channels enables the supplied colloid to be drained to the entire glue printing layer 20 in a uniformly dispersed manner, avoiding the phenomenon that the colloid is concentrated in a local area and ensuring the uniformity of the glue coating. The glue printing layer 20 with a microporous structure can not only effectively control the penetration flow rate of the colloid, but also adopt glue printing layers 20 with different porosities according to different application requirements to meet the requirements of different media and dot coating processes.

[0083] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0084] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. An ink printing head for a dispensing valve, characterized in that, Comprising: A runner seat, the runner seat being provided with a glue inlet for receiving the glue extruded by the valve body of the dispensing valve; An offset printing layer, the offset printing layer being made of a material with a microporous structure, and the offset printing layer being provided on the bottom surface of the runner seat; Wherein, a plurality of runners are provided in the runner seat, the plurality of runners are arranged at intervals in the circumferential direction around the glue inlet, and the upper end of each runner is communicated with the glue inlet, and the lower end of each runner is communicated with the offset printing layer, so as to disperse and divert the glue to the offset printing layer through the plurality of runners.

2. The glue printing head for the dispensing valve according to claim 1, wherein The runner seat includes: A diversion seat, the glue inlet being provided on the diversion seat; A shunt seat, the shunt seat being provided at the bottom of the diversion seat and defining a glue cavity with the diversion seat; A plurality of diversion holes are provided in the diversion seat, the plurality of diversion holes are arranged at intervals in the circumferential direction around the glue inlet, the upper end of each diversion hole is communicated with the glue inlet, and the lower end of each diversion hole is communicated with the glue cavity; A plurality of shunt holes are provided in the shunt seat, the plurality of shunt holes are dispersedly arranged in the area corresponding to the glue cavity, the upper end of each shunt hole is communicated with the glue cavity, and the lower end of each shunt hole is communicated with the offset printing layer.

3. The glue printing head for a dispensing valve according to claim 2, wherein, The diversion holes are formed as inclined holes gradually offsetting outward in the direction from top to bottom, and the shunt holes are formed as straight holes extending in the up and down direction.

4. The glue printing head for a dispensing valve according to claim 2, wherein The number of the shunt holes is greater than the number of the diversion holes.

5. The glue printing head for the dispensing valve according to claim 2, characterized in that, The shape of the glue cavity is consistent with the shape of the offset printing layer.

6. The glue printing head for a dispensing valve according to claim 2, characterized in that, A groove is provided on the bottom surface of the diversion seat, and the shunt seat is hermetically attached to the bottom surface of the diversion seat to hermetically seal the groove to form the glue cavity.

7. The glue printing head for the dispensing valve according to claim 2, characterized in that, A printing table portion adapted to the shape of the offset printing layer is provided on the bottom surface of the shunt seat, an installation groove is provided on the printing table portion, and the offset printing layer is provided in the installation groove and partially protrudes from the bottom surface of the printing table portion.

8. The glue printing head for a dispensing valve according to claim 6, characterized in that, An annular sealing groove is provided on the bottom surface of the shunt seat, the annular sealing groove is located outside the glue cavity, and a sealing ring is provided in the annular sealing groove; The shunt seat and the diversion seat are locked and fixed by fasteners, and the sealing ring is compressed, so as to form a sealed state between the shunt seat and the diversion seat.

9. The glue printing head for a dispensing valve according to any one of claims 1 to 8, characterized in that, The shape and size of the offset printing layer are consistent with the pattern to be printed.

10. A dispensing valve, characterized in that, Comprising: A valve body, the valve body having a glue outlet for extruding glue; The glue printing head for a dispensing valve according to any one of claims 1 to 9, the glue printing head being provided on the valve body, and the glue inlet being communicated with the glue outlet.

Images