Split dispensing head and dispensing valve device having the same

Abstract

The utility model discloses a split type point gum head and point gum valve device with it, split type point gum head includes nozzle seat, holds up seat and point gum needle, the downward opening funnel -shaped guide glue cavity of funnel -shaped guide glue cavity has on nozzle seat upper end surface, and nozzle seat bottom is opened along the vertical and has the glue discharge channel that goes through to funnel -shaped guide glue cavity inner bottom, and holds up seat is located nozzle seat lower bottom surface and is set up, and the fixed channel that holds up seat is opened and is located glue discharge channel just below and is communicated with glue discharge channel through the upper and lower end surface of its, and the interference fit of point gum needle is inserted solid in fixed channel, and its lower end extends downward to form the lower extension that exposes to the lower part outside of fixed channel, and nozzle seat is tungsten steel or ceramic material, and holds up seat and point gum needle are stainless steel material. Effect: split type point gum head processing is easy, and the cost is low, so that the whole point gum valve device is also low in processing difficulty and low in production cost, when point gum needle is blocked and needs to be replaced, only needs to replace the overall of the lower cost of holding up seat and point gum needle, and can save the use cost more.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a split dispensing head and a dispensing valve device having the same. Background Technology

[0002] Dispensing valves are core components in industrial automation, controlling the precise application of adhesives or other fluids. They are widely used in industries such as electronics assembly, semiconductor packaging, medical devices, automotive manufacturing, and LED lighting. Their core function is to precisely control fluid flow by starting / stopping the valve, accurately controlling the amount of adhesive dispensed each time, controlling the dispensing shape (dots, lines, or coatings), and adapting to different fluids, including those of varying viscosities, filler content, and chemical properties, such as adhesives, inks, greases, and fluxes.

[0003] Conventional dispensing valve devices using piezoelectric valves have a dispensing stop pin. The opening and closing of the dispensing head is controlled by the up-and-down movement of the dispensing stop pin. Therefore, the dispensing head usually consists of a support base with a funnel-shaped dispensing cavity inside and a dispensing needle connected to the bottom of the support base and communicating with the middle of the bottom of the funnel-shaped dispensing cavity. The dispensing stop pin moves downward at a high frequency and tightly presses against the bottom wall of the funnel-shaped dispensing cavity to seal the dispensing needle. Therefore, in actual use, the support base and dispensing needle are usually molded as a single piece and made of tungsten carbide or ceramic material to give it high hardness, good wear resistance and impact resistance, and maintain a long service life.

[0004] However, the inventor of this patent discovered that due to the huge market demand and the very high frequency of replacement, the support base and dispensing needle are made of tungsten steel or ceramic material and molded as one piece, which results in high consumable costs. Furthermore, because they are molded as one piece and the dispensing needles are very small, it increases the difficulty of mold making during manufacturing, making the processing very difficult. At the same time, since they are all made of tungsten steel or ceramic material and molded as one piece, the replacement cost when they break is also very high.

[0005] In response, the inventor of this patent, drawing on work experience, deeply considered the problems encountered in his work, reviewed a large amount of scientific research data and literature, and gradually conceived and designed this application through a novelty search to solve the relevant technical problems. Utility Model Content

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the purpose of this invention is to provide a split-type dispensing head and a dispensing valve device having therein.

[0007] To achieve one of the above objectives, a split-type dispensing head according to an embodiment of the present invention includes a nozzle seat, a support seat, and a dispensing needle;

[0008] The nozzle seat has a funnel-shaped adhesive guiding cavity facing downward at its upper end, and an adhesive discharge channel extending vertically to the bottom of the funnel-shaped adhesive guiding cavity is provided at the bottom of the nozzle seat.

[0009] The support seat is fitted to the bottom surface of the nozzle seat, and the support seat has a fixed channel that passes through its upper and lower end faces and is located directly below the glue discharge channel and is connected to the glue discharge channel.

[0010] The dispensing needle is interference-fitted into the fixing channel, and its lower end extends downward to form a lower extension portion exposed outside the lower part of the fixing channel.

[0011] In addition, the split dispensing head according to the above embodiments of this utility model may also have the following additional technical features:

[0012] According to one embodiment of the present invention, the nozzle seat is made of tungsten steel or ceramic material; the support seat and the dispensing needle are both made of stainless steel.

[0013] According to one embodiment of the present invention, the upper outer wall of the dispensing needle and the inner wall of the fixing channel are bonded together with a strong adhesive.

[0014] According to one embodiment of the present invention, the fixed channel includes a fixed channel A located at the upper part and a fixed channel B located at the lower part;

[0015] The inner diameter of the fixed channel A is slightly larger than the inner diameter of the fixed channel B; the outer wall of the upper end of the dispensing needle protrudes outward to form a ring of interference fit that is fixed to the outer edge of the fixed channel A, and the middle part of the dispensing needle is interference fit that is fixed to the fixed channel B.

[0016] According to one embodiment of the present invention, a sealing ring A is also included;

[0017] A limiting groove is formed around the fixed channel A on the upper end surface of the support seat; the lower part of the sealing ring A is fitted into the limiting groove, and the upper part of the sealing ring A is tightly pressed against the bottom surface of the nozzle seat.

[0018] According to one embodiment of the present invention, it also includes a T-shaped adhesive guide seat;

[0019] The T-shaped adhesive guide seat includes an adhesive guide plate arranged in a horizontal direction and an adhesive guide cylinder arranged in a vertical direction at the bottom center of the adhesive guide plate and integrally formed with the adhesive guide plate.

[0020] The upper surface of the glue guide plate has a downward-facing groove at the center for inserting the glue-closing strike pin, and its bottom is connected to the upper part of the glue guide cylinder. The upper surface of the glue guide plate has a glue-guiding channel on the left side, tilted downward to the right, which connects to the lower part of the groove. The support seat is fixedly attached to the bottom of the glue guide cylinder so that the funnel-shaped glue-guiding cavity is located directly below the glue guide cylinder and connected to the lower part of the glue guide cylinder. The inner diameter of the groove and the inner diameter of the glue guide cylinder are both slightly larger than the outer diameter of the glue-closing strike pin.

[0021] According to one embodiment of the present invention, the bottom of the guide tube is provided with a retaining groove facing upward, and the nozzle seat and the upper part of the support seat are interference-fitted into the retaining groove.

[0022] According to one embodiment of the present invention, a locking sleeve for securing the support seat is also included;

[0023] The top of the locking sleeve is open and the bottom is narrowed. The locking sleeve is detachably fitted onto the lower end of the glue guide tube and tightly secures the nozzle seat and the support seat. The lower extension of the glue dispensing needle extends downward from the narrowed opening.

[0024] According to one embodiment of the present invention, the locking sleeve is threaded onto the lower end of the guide tube; the guide tube is an extended guide tube with a length of L, wherein L ≥ 2.0 cm.

[0025] To achieve the second objective mentioned above, the dispensing valve device according to an embodiment of the present utility model includes a glue tank for storing glue liquid, a dispensing pin, and a piezoelectric valve for driving the dispensing pin to move up and down. The device is characterized in that it also includes a split dispensing head as described above.

[0026] The glue bucket and the piezoelectric valve are arranged side by side, and the bottom of the glue bucket is connected to the upper left end of the glue guide channel; the upper end of the glue-closing strike pin is connected to the piezoelectric valve, and the lower end passes through the through groove and the glue guide cylinder and closely abuts against the bottom of the funnel-shaped glue guide cavity, so as to move up and down under the control of the piezoelectric valve to open / close the glue dispensing needle accordingly.

[0027] The beneficial effects of this utility model are:

[0028] Firstly, the split-type dispensing head and dispensing valve device provided in this application, in specific implementation, include a nozzle seat, a support seat, and a dispensing needle that are separately manufactured and then assembled. The nozzle seat is made of tungsten carbide or ceramic, while the support seat and the dispensing needle are made of stainless steel. Because the support seat and the dispensing needle are made of stainless steel, their hardness is relatively low, making them easy to process and cost-effective. Thus, the split-type dispensing head of this application has low overall processing difficulty and low production cost.

[0029] Secondly, when the dispensing needle is blocked and needs to be replaced, only the lower-cost support and the dispensing needle as a whole need to be replaced, while the higher-cost nozzle seat can still be used. This makes the replacement cost of the split dispensing head of this application low and saves on usage costs.

[0030] Thirdly, regarding the split-type dispensing head, its fixing channels include an upper fixing channel A and a lower fixing channel B. The inner diameter of the fixing channel A is slightly larger than the inner diameter of the fixing channel B. The outer wall of the upper end of the dispensing needle protrudes outward to form an interference fit that secures it to the outer edge of the fixing channel A. The middle part of the dispensing needle is also interference fit secured to the fixing channel B. In this way, the fixing channel B can better support the outer edge of the fixing channel, so that when the dispensing needle is inserted into the fixing channel from top to bottom, its insertion position is controllable. This can play a certain role in positioning the insertion position of the dispensing needle and in securing and preventing the dispensing needle from falling out, making the split-type dispensing head provided in this application very stable and reliable in use.

[0031] Fourthly, this application makes the glue guide tube an extended glue guide tube, with a length of L, and L≥2.0cm. In this way, the vertical length of the glue guide tube of this application is sufficient, so that the split glue dispensing head of this application can be used for glue dispensing operations in areas with relatively small dispensing space, thus making the split glue dispensing head of this application highly adaptable.

[0032] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 1. Figure 1 ;

[0035] Figure 2 This is an analysis of the insert-type dispensing head of this utility model in Embodiment 1. Figure 1 ;

[0036] Figure 3 This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 1. Figure 2 ;

[0037] Figure 4 This is an analysis of the insert-type dispensing head of this utility model in Embodiment 1. Figure 2 ;

[0038] Figure 5 This is a longitudinal sectional view of the insert-type dispensing head of this utility model in Embodiment 1;

[0039] Figure 6 This is an exploded longitudinal sectional view of the embedded tube dispensing head of this utility model in Embodiment 1;

[0040] Figure 7 This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 1 ;

[0041] Figure 8 This is an analysis of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 1 ;

[0042] Figure 9 This is a schematic diagram of the overall structure of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 2 ;

[0043] Figure 10 This is an analysis of the embedded tube dispensing head of this utility model in Embodiment 2. Figure 2 ;

[0044] Figure 11 This is a longitudinal sectional view of the embedded tube dispensing head of this utility model in Embodiment 2;

[0045] Figure 12This is a schematic diagram of the overall structure of the dispensing valve device of this utility model in Embodiment 3;

[0046] Figure 13 This is a longitudinal sectional view of the dispensing valve device of this utility model in Embodiment 3;

[0047] Figure label:

[0048] 1000 split-type dispensing head;

[0049] Nozzle seat 10;

[0050] Funnel-shaped adhesive guiding cavity 101;

[0051] Discharge channel 102;

[0052] Lift seat 20;

[0053] Fixed channel 201;

[0054] Fixed channel A2011;

[0055] Fixed channel B2012;

[0056] Limiting groove 202;

[0057] Glue dispensing needle 30;

[0058] Lower extension 301;

[0059] Support the outer edge 302;

[0060] Sealing ring A40;

[0061] T-shaped adhesive guide seat 50;

[0062] 501 adhesive guide plate;

[0063] Through slot 5011;

[0064] Adhesive channel 5012;

[0065] Adhesive channel A50121;

[0066] Adhesive channel B50122;

[0067] Sealing ring B5013;

[0068] Cleaning passage 5014;

[0069] Sealing plug 5015;

[0070] Fixing hole 5016;

[0071] 502 adhesive guide tube;

[0072] 5021 locking groove;

[0073] Locking sleeve 60;

[0074] 601 with narrowed neck;

[0075] Dispensing valve device 2000;

[0076] Glue bucket 70;

[0077] 80mm sealing pin;

[0078] piezoelectric valve 90;

[0079] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0080] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0081] In the description of this utility model, it should be understood that 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 according to the specific circumstances.

[0084] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] The following describes in detail, with reference to the accompanying drawings, a split-type dispensing head 1000 and a dispensing valve device 2000 having therein, embodiments of the present invention.

[0086] Example 1

[0087] Reference Figures 1 to 6 As shown;

[0088] The split-type dispensing head 1000 provided according to the embodiment of the present utility model includes a nozzle seat 10, a support seat 20 and a dispensing needle 30.

[0089] The nozzle seat 10 has a funnel-shaped glue guiding cavity 101 with its upper end facing downward, and a glue discharge channel 102 with its bottom vertically extending to the bottom of the funnel-shaped glue guiding cavity 101.

[0090] Furthermore, the support seat 20 is fitted to the lower bottom surface of the nozzle seat 10, and the support seat 20 has a fixed channel 201 that passes through its upper and lower end surfaces and is located directly below the glue discharge channel 102 and communicates with the glue discharge channel 102.

[0091] Furthermore, the dispensing needle 30 is inserted into the fixing channel 201 with an interference fit, and its lower end extends downward to form a lower extension 301 exposed outside the lower part of the fixing channel 201.

[0092] Preferably, in this technical solution, according to an embodiment of the present invention, the nozzle seat 10 is made of tungsten steel or ceramic material; the support seat 20 and the dispensing needle 30 are both made of stainless steel.

[0093] Based on the above, it is clear that this application is mainly used as a split-type dispensing head 1000 in specific implementation.

[0094] Specifically, when applying this application, the dispensing needle 30 is very small. For traditional dispensing heads, the support and the dispensing needle are integrally formed and are mainly made of tungsten steel or ceramic materials to facilitate working with the dispensing pin. Because of their high hardness, the integrally formed support and dispensing needle are difficult to process, and the production cost and replacement and maintenance cost are high.

[0095] Therefore, this patent uses different materials so that the nozzle seat 10, the support seat 20 and the dispensing needle 30 are manufactured separately and then assembled. The nozzle seat 10 is made of tungsten steel or ceramic, while the support seat 20 and the dispensing needle 30 are made of stainless steel. Because the support seat 20 and the dispensing needle 30 are made of stainless steel, their hardness is lower, making them easier to process and cheaper. Thus, the split dispensing head 1000 described in this application has lower overall processing difficulty and lower production cost.

[0096] Meanwhile, when the dispensing needle 30 is blocked and needs to be replaced, only the lower-cost support seat 20 and the dispensing needle 30 as a whole need to be replaced, while the higher-cost nozzle seat 10 can still be used. This makes the replacement cost of the split dispensing head 1000 of this application low and saves on usage costs.

[0097] Furthermore, through the above-mentioned optimized design, the whole constituted by this application is highly practical and has a good effect in use.

[0098] Furthermore, in a specific implementation, according to one embodiment of the present invention, the upper outer wall of the dispensing needle 30 and the inner wall of the fixing channel 201 are bonded together with a strong adhesive.

[0099] When there is a small gap between the upper outer wall of the dispensing needle 30 and the inner wall of the fixing channel 201, strong adhesive can be injected to bond them together. This makes the connection between the needle and the support 20 stable and not easy to loosen, making the split dispensing head 1000 described in this application reliable.

[0100] Preferably, in this technical solution, according to an embodiment of the present utility model, the fixed channel 201 includes a fixed channel A2011 located at the upper part and a fixed channel B2012 located at the lower part;

[0101] Based on this, in this application, the inner diameter of the fixed channel A2011 is slightly larger than the inner diameter of the fixed channel B2012; the outer wall of the upper end of the dispensing needle 30 protrudes outward to form a ring of interference fit that is fixed to the outer edge 302 of the fixed channel A2011, and the middle part of the dispensing needle 30 is interference fit that is fixed to the fixed channel B2012.

[0102] In this regard, it is clear that in the actual invention of this application, since the inner diameter of the fixed channel A2011 is slightly larger than the inner diameter of the fixed channel B2012, the outer edge 302 of the dispensing needle 30 is interference-fitted into the fixed channel A2011, and the middle part of the dispensing needle 30 is interference-fitted into the fixed channel B2012. This allows the fixed channel B2012 to better support the outer edge 302, so that when the dispensing needle 30 is inserted into the fixed channel 201 from top to bottom, its insertion position is controllable. This can play a certain role in positioning the insertion position of the dispensing needle 30 and in securing and preventing the dispensing needle 30 from falling out.

[0103] Furthermore, through the above-mentioned optimized design, the overall performance of the split-type dispensing head 1000 described in this application can be effectively improved.

[0104] Preferably, in this technical solution, according to an embodiment of the present utility model, the split-type dispensing head 1000 of this application further includes a sealing ring A40;

[0105] The upper end face of the lifting seat 20 is provided with a limiting groove 202 around the fixed channel A2011; the lower part of the sealing ring A40 is fitted into the limiting groove 202, and the upper part of the sealing ring A40 is tightly pressed against the lower bottom surface of the nozzle seat 10.

[0106] Therefore, in actual use of this application, so that the nozzle seat 10 and the support seat 20 fit tightly together, and the lower part of the sealing ring A40 is fitted into the limiting groove 202, and the upper part of it tightly abuts against the lower bottom surface of the nozzle seat 10, so that there is no gap between the lower bottom surface of the nozzle seat 10 and the upper end surface of the support seat 20, so that when the adhesive flows downward through its interior, the parts between them have a good anti-leakage effect.

[0107] Example 2

[0108] Reference Figures 7 to 11 As shown;

[0109] Based on Embodiment 1, according to an embodiment of the present invention, the split-type dispensing head 1000 of this application further includes a T-shaped dispensing seat 50;

[0110] The T-shaped adhesive guide seat 50 includes an adhesive guide plate 501 arranged in a horizontal direction and an adhesive guide cylinder 502 arranged in a vertical direction at the bottom center of the adhesive guide plate 501 and integrally formed with the adhesive guide plate 501.

[0111] Based on this, the upper end face of the glue guide plate 501 has a downward-facing groove 5011 for inserting the glue-closing ejector pin 80 and whose bottom is connected to the upper part of the glue guide cylinder 502; a sealing ring B5013 suitable for interference fit insertion of the glue-closing ejector pin 80 is fixed in the upper part of the groove 5011; a glue guide channel 5012 connected to the lower part of the groove 5011 is opened on the left side of the upper end face of the glue guide plate 501 at an angle to the lower right; the lifting seat 20 is fixedly attached to the bottom of the glue guide cylinder 502 so that the funnel-shaped glue guide cavity 101 is located directly below the glue guide cylinder 502 and connected to the lower part of the glue guide cylinder 502; the inner diameter of the groove 5011 and the inner diameter of the glue guide cylinder 502 are both slightly larger than the outer diameter of the glue-closing ejector pin 80 and larger than the inner diameter of the glue dispensing needle 30.

[0112] Therefore, it can be clearly understood that, on the one hand, by connecting a glue tank 70 or other glue storage container to the upper left part of the glue channel 5012, glue can be introduced into the glue channel 5012. The introduced glue can flow along the through groove 5011 and the glue guide cylinder 502 into the funnel-shaped glue guide cavity 101, and then flow out through the lower end of the glue dispensing needle 30 to achieve glue dispensing operation at the required position on the surface of the product that needs glue. On the other hand, by inserting a glue-closing striker 80 into the through groove 5011, its lifting mechanism can be controlled by an external piezoelectric valve 90 or other lifting device. The up-and-down movement opens / closes the upper end of the dispensing needle 30, allowing it to open within a set time (at which time the lower end of the matching sealing pin 80 is facing upwards away from the upper part of the fixed channel A2011) and block within a set time (at which time the lower end of the matching sealing pin 80 is tightly pressed against the upper part of the fixed channel A2011), thereby enabling the split dispensing head 1000 described in this application to intermittently dispense glue to the required positions on the surface of the product that needs glue.

[0113] Furthermore, in a specific implementation, according to one embodiment of the present utility model, the bottom of the guide tube 502 is provided with a retaining groove 5021, and the upper part of the nozzle seat 10 and the lifting seat 20 are interference-fitted into the retaining groove 5021.

[0114] In this way, both the nozzle seat 10 and the support seat 20 are fixed and stable and not easily displaced circumferentially, and the dispensing needle 30 fixed at the bottom of the support seat 20 is also fixed and stable and not easily displaced circumferentially.

[0115] Furthermore, based on the above-mentioned solutions, according to an embodiment of the present utility model, the split dispensing head 1000 of this application further includes a locking sleeve 60 for locking the support seat 20;

[0116] The locking sleeve 60 has an open top and a narrowed bottom 601. The locking sleeve 60 is detachably fitted onto the lower end of the glue guide cylinder 502 and tightly secures the nozzle seat 10 and the lifting seat 20. The lower extension 301 of the glue dispensing needle 30 extends downward from the narrowed bottom 601.

[0117] Preferably, in this technical solution, according to an embodiment of the present utility model, the locking sleeve 60 is threadedly screwed onto the lower end of the adhesive guide cylinder 502.

[0118] Therefore, it can be clearly stated that:

[0119] On the one hand, when the locking sleeve 60 is fitted outside the lower end of the glue guide cylinder 502 and tightly secures the lower part of the support seat 20, the nozzle seat 10 and the support seat 20 are fixed and stable and not easily moved up and down. The glue dispensing needle 30 fixed at the bottom of the support seat 20 is also fixed and stable and not easily moved up and down. As a result, the whole is not easily moved circumferentially or up and down when it is fixed, making it reliable in use.

[0120] On the other hand, since the locking sleeve 60 is threaded onto the lower end of the glue guide cylinder 502, it is detachable. Therefore, when the glue dispensing needle 30 is blocked, the locking sleeve 60 can be removed to replace the entire assembly consisting of the support seat 20 and the glue dispensing needle 30, or to clear and maintain the entire assembly before reinstallation. This makes the reliability of this application better and more comprehensive. It eliminates the need to replace the T-shaped glue guide seat 50, the locking sleeve 60, and the nozzle seat 10, resulting in low usage and maintenance costs.

[0121] Preferably, in this technical solution, according to an embodiment of the present utility model, the locking sleeve 60 is threadedly screwed onto the lower end of the guide tube 502; the guide tube 502 is an extended guide tube 502 with a length of L, wherein L≥2.0cm.

[0122] It should be noted that traditional glue guide tubes have very short vertical lengths. For areas with limited space for glue application, such as the inner wall of a mobile phone case, this limited length restricts their use, making it difficult for the lower end of the glue dispensing needle to reach such areas. To address this, this application uses an elongated glue guide tube 502 with a length of L ≥ 2.0 cm. This ensures sufficient vertical length for the glue guide tube 502, allowing the split-type glue dispensing head 1000 to be used for glue application in areas with limited space, thus enhancing the adaptability of the embedded tube glue dispensing head.

[0123] Example 3

[0124] Reference Figures 12 to 13 As shown;

[0125] Based on Embodiment 2, the dispensing valve device 2000 according to this utility model embodiment includes a glue tank 70 for storing glue liquid, a glue-closing striker 80 and a piezoelectric valve 90 for driving the glue-closing striker 80 to move up and down, and also includes a split dispensing head 1000 as described in Embodiment 2 above.

[0126] The glue tank 70 and the piezoelectric valve 90 are arranged side by side, and the bottom of the glue tank 70 is connected to the upper left end of the glue guide channel 5012; the upper end of the glue-closing striker 80 is connected to the piezoelectric valve 90, and the lower end passes through the through groove 5011 and the glue guide cylinder 502 and is tightly pressed against the bottom of the funnel-shaped glue guide cavity 101, so that it can move up and down under the control of the piezoelectric valve 90 to open / close the glue dispensing needle 30 accordingly.

[0127] Therefore, it can be clearly understood that, on the one hand, by connecting the glue tank 70 containing the glue liquid to the upper left part of the glue channel 5012, the glue liquid can be introduced into the glue channel 5012. The introduced glue liquid can then flow along the through groove 5011 and the glue guide cylinder 502 into the funnel-shaped glue guide cavity 101, and then flow out through the lower end of the glue dispensing needle 30 to achieve the glue dispensing operation at the required position on the surface of the product that needs glue. On the other hand, by inserting the glue-closing strike pin 80 into the through groove 5011, the upper part of the product can be controlled by the external piezoelectric valve 90. The downward movement opens / closes the upper end of the dispensing needle 30 accordingly, so as to open the upper end of the dispensing needle 30 within a set time (at this time, the lower end of the matching sealing pin 80 is facing upward away from the upper part of the fixed channel A2011) and block the upper end of the dispensing needle 30 within a set time (at this time, the lower end of the matching sealing pin 80 is tightly pressed against the upper part of the fixed channel A2011), so as to realize the dispensing valve device 2000 of this application to intermittently perform dispensing operations on the required positions on the surface of the product that needs dispensing.

[0128] The present application in Embodiment 3 also adopts the split dispensing head 1000 described in Embodiments 1 and 2. Therefore, the technical effects produced are exactly the same as those produced in Embodiments 1 and 2, and will not be repeated here.

[0129] It should be added that, in specific implementation, according to the split dispensing head 1000 and the dispensing valve device 2000 having it provided in the embodiments of this utility model, whether it is the above embodiment one or the above embodiment two, the adhesive guiding channel 5012 includes an adhesive guiding channel A50121 arranged vertically and an adhesive guiding channel B50122 arranged obliquely. The upper end of the adhesive guiding channel B50122 is connected to the lower end of the adhesive guiding channel A50121, and the lower end of the adhesive guiding channel B50122 is connected to the lower part of the through groove 5011. A cleaning channel 5014 is opened on the left side wall of the adhesive guiding plate 501, which extends to the adhesive guiding channel B50122. The cleaning channel 5014 is coaxially arranged with the adhesive guiding channel B50122 so that they are on the same straight line, and a sealing plug 5015 is provided at the outer end of the cleaning channel 5014 for pluggability.

[0130] Thus, when the sealing plug 5015 is removed to open the cleaning channel 5014, the interior of the adhesive channel A50121 and the interior of the adhesive channel B50122 can be cleaned and maintained, resulting in a long service life for this application.

[0131] Furthermore, in specific implementation, the upper surface of the glue guide plate 501 is also provided with fixing holes 5016 for fixing the glue bucket 70 and the piezoelectric valve 90 used in conjunction. As for the piezoelectric valve 90, it is an existing mature technology and a mature product, and it is widely used in the field of dispensing. Here, its details will not be elaborated.

[0132] Other embodiments, etc., will not be described here.

[0133] In summary, the split-type dispensing head 1000 and the dispensing valve device 2000 with it provided in this application, in specific implementation, include a nozzle seat 10, a support seat 20, and a dispensing needle 30, which are separately manufactured and then assembled. The nozzle seat 10 is made of tungsten carbide or ceramic material, while the support seat 20 and the dispensing needle 30 are made of stainless steel. Because the support seat 20 and the dispensing needle 30 made of stainless steel have lower hardness, they are easier to process and have lower cost. Thus, the split-type dispensing head 1000 of this application has lower overall processing difficulty and lower production cost.

[0134] Meanwhile, when the dispensing needle 30 is blocked and needs to be replaced, only the lower-cost support seat 20 and the dispensing needle 30 as a whole need to be replaced, while the higher-cost nozzle seat 10 can still be used. This makes the replacement cost of the split dispensing head 1000 of this application low and saves on usage costs.

[0135] Furthermore, for the split-type dispensing head 1000, since its fixing channel 201 includes a fixing channel A2011 located at the upper part and a fixing channel B2012 located at the lower part, the inner diameter of the fixing channel A2011 is slightly larger than the inner diameter of the fixing channel B2012. The outer wall of the upper end of the dispensing needle 30 protrudes outward to form an interference fit that secures the outer edge 302 to the fixing channel A2011. The middle part of the dispensing needle 30 is interference fit secured to the fixing channel B2012. In this way, the fixing channel B2012 can better support the outer edge 302, so that when the dispensing needle 30 is inserted into the fixing channel 201 from top to bottom, its insertion position is controllable. It can play a certain role in positioning the insertion position of the dispensing needle 30 and in securing and preventing the dispensing needle 30 from falling off, making the split-type dispensing head 1000 provided in this application very stable and reliable in use.

[0136] Furthermore, this application makes the glue guide tube 502 an elongated glue guide tube 502, with a length of L, and L≥2.0cm. In this way, the glue guide tube 502 of this application has sufficient vertical length, so that the split-type glue dispensing head 1000 of this application can be used for glue dispensing operations in areas with relatively small dispensing space, thus making the split-type glue dispensing head 1000 of this application highly adaptable.

[0137] Furthermore, the split-type dispensing head 1000 and the dispensing valve device 2000 with it provided in this application are indeed highly practical and have excellent performance, which makes this application have great market promotion value and will certainly be very popular and effectively popularized.

[0138] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0139] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A split-type dispensing head, characterized in that, Includes nozzle holder, support base and dispensing needle; The nozzle seat has a funnel-shaped adhesive guiding cavity facing downward at its upper end, and an adhesive discharge channel extending vertically to the bottom of the funnel-shaped adhesive guiding cavity is provided at the bottom of the nozzle seat. The support seat is fitted to the bottom surface of the nozzle seat, and the support seat has a fixed channel that passes through its upper and lower end faces and is located directly below the glue discharge channel and is connected to the glue discharge channel. The dispensing needle is interference-fitted into the fixing channel, and its lower end extends downward to form a lower extension portion exposed outside the lower part of the fixing channel.

2. The split-type dispensing head according to claim 1, characterized in that, The nozzle seat is made of tungsten carbide or ceramic; the support seat and the dispensing needle are both made of stainless steel.

3. The split-type dispensing head according to claim 1, characterized in that, The upper outer wall of the dispensing needle and the inner wall of the fixed channel are bonded together with a strong adhesive.

4. The split-type dispensing head according to claim 1, characterized in that, The fixed channel includes a fixed channel A located at the upper part and a fixed channel B located at the lower part; The inner diameter of the fixed channel A is slightly larger than the inner diameter of the fixed channel B; the outer wall of the upper end of the dispensing needle protrudes outward to form a ring of interference fit that is fixed to the outer edge of the fixed channel A, and the middle part of the dispensing needle is interference fit that is fixed to the fixed channel B.

5. The split-type dispensing head according to claim 4, characterized in that, It also includes sealing ring A; A limiting groove is formed around the fixed channel A on the upper end surface of the support seat; the lower part of the sealing ring A is fitted into the limiting groove, and the upper part of the sealing ring A is tightly pressed against the bottom surface of the nozzle seat.

6. The split-type dispensing head according to claim 1, characterized in that, It also includes a T-shaped adhesive guide seat; The T-shaped adhesive guide seat includes an adhesive guide plate arranged in a horizontal direction and an adhesive guide cylinder arranged in a vertical direction at the bottom center of the adhesive guide plate and integrally formed with the adhesive guide plate. The upper surface of the glue guide plate has a downward-facing groove at the center for inserting the glue-closing strike pin, and its bottom is connected to the upper part of the glue guide cylinder. The upper surface of the glue guide plate has a glue-guiding channel on the left side, tilted downward to the right, which connects to the lower part of the groove. The support seat is fixedly attached to the bottom of the glue guide cylinder so that the funnel-shaped glue-guiding cavity is located directly below the glue guide cylinder and connected to the lower part of the glue guide cylinder. The inner diameter of the groove and the inner diameter of the glue guide cylinder are both slightly larger than the outer diameter of the glue-closing strike pin.

7. The split-type dispensing head according to claim 6, characterized in that, The bottom of the guide tube is provided with a retaining groove facing upwards, and the nozzle seat and the upper part of the support seat are interference-fitted into the retaining groove.

8. The split-type dispensing head according to claim 7, characterized in that, It also includes a locking sleeve for securing the support seat; The top of the locking sleeve is open and the bottom is narrowed. The locking sleeve is detachably fitted onto the lower end of the glue guide tube and tightly secures the nozzle seat and the support seat. The lower extension of the glue dispensing needle extends downward from the narrowed opening.

9. The split-type dispensing head according to claim 8, characterized in that, The locking sleeve is threaded onto the lower end of the guide tube; the guide tube is an extended guide tube with a length of L, where L ≥ 2.0 cm.

10. A dispensing valve device, comprising a glue tank for holding glue liquid, a dispensing pin, and a piezoelectric valve for driving the dispensing pin to move up and down, characterized in that, It also includes the split-type dispensing head as described in any one of claims 6-9; The glue bucket and the piezoelectric valve are arranged side by side, and the bottom of the glue bucket is connected to the upper left end of the glue guide channel; the upper end of the glue-closing strike pin is connected to the piezoelectric valve, and the lower end passes through the through groove and the glue guide cylinder and closely abuts against the bottom of the funnel-shaped glue guide cavity, so as to move up and down under the control of the piezoelectric valve to open / close the glue dispensing needle accordingly.

Images