Optimized hot melt adhesive nozzle

Abstract

The utility model discloses an optimized hot melt adhesive spray head which comprises a hot melt adhesive spray head body, the hot melt adhesive spray head body comprises an adhesive feeding surface, more than one adhesive feeding mechanism is arranged on the adhesive feeding surface, and each adhesive feeding mechanism comprises an adhesive feeding channel, an annular groove, an annular convex column and an O-shaped sealing ring; a glue inlet channel is arranged on the glue inlet surface of the hot melt glue nozzle body; annular grooves are formed in the glue inlet surface of the hot melt glue nozzle body and the annular outer side surface of the glue inlet channel; the annular groove comprises an annular inner side surface and an annular outer side surface, and an annular convex column is formed between the annular inner side surface of the annular groove and the glue inlet channel; the O-shaped ring sealing ring is clamped in the annular groove, the annular outer side face of the O-shaped ring sealing ring is in close contact with and fixedly connected with the annular outer side face of the annular groove, and an annular ring bundle extrusion connecting gap is formed between the annular inner side face of the O-shaped ring sealing ring and the annular outer side face of the annular protruding column.

Description

Technical Field

[0001] The utility model relates to the technical field of adhesive spraying, in particular to an optimized hot melt adhesive spray head. Background Art

[0002] Hot melt adhesive nozzle is a kind of equipment widely used in industrial production lines. Its main function is to melt the solid hot melt adhesive by heating, and then spray it onto the workpiece at a certain pressure and speed, so as to achieve the process requirements of bonding, encapsulating or coating the workpiece.

[0003] The working principle of a hot melt adhesive nozzle is usually to melt the solid adhesive through electric heating or other heating methods, and then use the pressure or mechanical device inside the nozzle to evenly spray the liquid adhesive out from a small nozzle.

[0004] Hot melt adhesive nozzles play an indispensable role in common application scenarios, such as furniture manufacturing, packaging industry, and automotive interior production. However, existing hot melt adhesive nozzles have certain technical problems and challenges in structure, especially in the sealing structure of the adhesive inlet.

[0005] In the traditional hot melt adhesive nozzle design, O-ring sealing rings are usually used to form a seal in the end face direction. In this design, one end of the O-ring will be squeezed, causing it to deform and fill the gap between the connecting parts, thereby achieving a sealing effect. However, this end face extrusion method has some inherent defects and problems. For example, in the traditional end face extrusion design, a large force needs to be applied in the end face direction to cause the end face to be extruded and deformed, which often requires the use of mechanical equipment for connection, increasing the complexity and cost of installation.

[0006] Therefore, how to improve the sealing performance of the hot melt adhesive nozzle while reducing the production cost and maintenance difficulty has become a technical problem to be solved by the present utility model. Utility Model Content

[0007] The technical problem solved by the present invention is to provide an optimized hot melt adhesive nozzle in response to the defects existing in the above-mentioned prior art, so as to solve the problem that in the traditional end face extrusion design of the O-ring mentioned in the above-mentioned background technology, a large force needs to be applied in the end face direction to promote the end face extrusion deformation and sealing.

[0008] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0009] An optimized hot melt adhesive nozzle comprises a hot melt adhesive nozzle body, the hot melt adhesive nozzle body comprises a glue feeding surface, and the glue feeding surface is provided with more than one glue feeding mechanism, the glue feeding mechanism comprises a glue feeding channel, an annular groove, an annular convex column and an O-ring sealing ring;

[0010] A glue feeding channel is arranged on the glue feeding surface of the hot melt glue nozzle body;

[0011] On the glue inlet surface of the hot melt glue nozzle body, an annular groove is provided on the annular outer surface of the glue inlet channel;

[0012] The annular groove comprises an annular inner side surface and an annular outer side surface, and an annular convex column is formed between the annular inner side surface of the annular groove and the glue feeding channel;

[0013] The O-ring sealing ring is clamped in the annular groove, the annular outer side surface of the O-ring sealing ring is in close contact with and fixedly connected to the annular outer side surface of the annular groove, and an annular ring bundle extrusion connection gap is formed between the annular inner side surface of the O-ring sealing ring and the annular outer side surface of the annular boss.

[0014] As a further solution of the utility model, the depth of the annular groove is between 50% and 100% of the thickness of the O-ring sealing ring to ensure that the O-ring sealing ring can be fully embedded therein and properly squeezed.

[0015] As a further solution of the utility model, the inner diameter of the glue inlet channel is between 5 mm and 15 mm.

[0016] As a further solution of the utility model, 2 to 4 glue feeding mechanisms are arranged on the glue feeding surface, and these glue feeding mechanisms are evenly distributed around the central axis of the hot melt glue nozzle, and the spacing between each glue feeding mechanism is equal.

[0017] As a further solution of the present invention, the hot melt adhesive nozzle body is made of high temperature resistant alloy steel or stainless steel.

[0018] As a further solution of the utility model, the O-ring sealing ring is made of silicone rubber or fluororubber.

[0019] Compared with the prior art, the beneficial effects of the utility model are: the ring bundle extrusion connection gap design is adopted. Compared with the traditional end face extrusion method, the design adopts side intrusion extrusion, which makes it easier for the O-ring sealing ring to cut in and form a tight connection, reducing the installation force and complexity required for extrusion sealing of the O-ring sealing end. The arc-shaped side of the O-ring sealing ring is utilized to ensure the sealing effect while greatly simplifying the installation process, avoiding the situation in the prior art where the end of the O-ring is mainly extruded and sealed. The end requires a large extrusion force, thereby achieving manual completion without the assistance of professional mechanical equipment. Taking furniture manufacturing as an example, the installation of traditional nozzles is cumbersome and easy to damage the sealing ring. The utility model is not only easy to install, but also improves production efficiency and reduces maintenance costs due to its stable sealing performance.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 It is a schematic diagram of the structure of an O-ring sealing ring.

[0024] Figure 3 for Figure 1 Schematic diagram of the structure from another perspective.

[0025] The reference numerals and names in the figures are as follows:

[0026] The hot melt adhesive nozzle body 1, the adhesive feeding surface 2, the adhesive feeding mechanism 3, the adhesive feeding channel 4, the annular groove 5, the annular convex column 6, the O-ring sealing ring 7 and the ring bundle extrusion connection gap 8. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 —3. In an embodiment of the utility model, an optimized hot melt adhesive nozzle comprises a hot melt adhesive nozzle body 1, the hot melt adhesive nozzle body 1 comprises a glue feeding surface 2, and the glue feeding surface 2 is provided with more than one glue feeding mechanism 3, the glue feeding mechanism 3 comprises a glue feeding channel 4, an annular groove 5, an annular protrusion 6 and an O-ring sealing ring 7;

[0029] A glue feeding channel 4 is provided on the glue feeding surface 2 of the hot melt glue nozzle body 1;

[0030] On the glue inlet surface 2 of the hot melt glue nozzle body 1, an annular groove 5 is provided on the annular outer surface of the glue inlet channel 4;

[0031] The annular groove 5 comprises an annular inner side surface and an annular outer side surface, and an annular protrusion 6 is formed between the annular inner side surface of the annular groove 5 and the glue inlet channel 4;

[0032] The O-ring sealing ring 7 is clamped in the annular groove 5, and the annular outer side surface of the O-ring sealing ring 7 is in close contact with and fixedly connected to the annular outer side surface of the annular groove 5. The fixed connection method can be fixed connection by bonding with high-temperature resistant glue, and / or fixed connection by clamping connection, both of which are extended implementation methods that can be known to ordinary technicians in this field, and an annular ring bundle extrusion connection gap 8 is formed between the annular inner side surface of the O-ring sealing ring 7 and the annular outer side surface of the annular boss 6.

[0033] The depth of the annular groove 5 is between 50% and 100% of the thickness of the O-ring sealing ring 7 to ensure that the O-ring sealing ring 7 can be fully embedded therein and properly squeezed.

[0034] The inner diameter of the glue inlet channel 4 is between 5 mm and 15 mm.

[0035] Two to four glue feeding mechanisms 3 are arranged on the glue feeding surface 2. These glue feeding mechanisms 3 are evenly distributed around the central axis of the hot melt glue nozzle, and the intervals between each glue feeding mechanism 3 are equal.

[0036] The hot melt adhesive nozzle body 1 is made of high temperature resistant alloy steel or stainless steel.

[0037] The O-ring seal ring 7 is made of silicone rubber or fluororubber.

[0038] Embodiment 1:

[0039] In this embodiment, an optimized hot melt adhesive nozzle is described, which includes a structure of a loop bundle extrusion connection gap 8. This structure is performed as follows in the actual application scenario.

[0040] First, for the sake of clarity, we need to understand the structure and position of the "loop extrusion connection gap 8". On the glue feeding surface 2 of the hot melt glue nozzle, each glue feeding mechanism 3 includes a glue feeding channel 4, and an annular groove 5 is arranged on the annular outer surface of the channel. An O-ring sealing ring 7 is clamped in the groove, and its annular outer surface is in close contact with the annular outer surface of the groove. And between the annular inner surface of the O-ring sealing ring 7 and the annular outer surface of the annular protrusion 6 in the groove, the so-called "loop extrusion connection gap 8" is formed.

[0041] In practical applications, when the colloid delivery tube is inserted into the glue inlet channel 4 and connected to the annular protrusion 6, it is actually inserted into the "binding and squeezing connection gap 8". Due to the elasticity and squeezing effect of the O-ring sealing ring 7, the colloid delivery tube is tightly bound on the annular protrusion 6, thereby forming a very tight connection and seal. At the same time, the arc shape of the O-ring sealing ring 7 itself is utilized to achieve the effect of convenient insertion.

[0042] In this way, due to the tight squeezing of the O-ring sealing ring 7, the connection between the colloid delivery tube and the annular protrusion 6 achieves a better sealing effect. The length of the mutual cooperation can be set as needed. By coordinating with a longer length and by relatively tighter cooperation, a better sealing effect can be achieved. It is an extended implementation method that ordinary technicians in the field can know, so as to ensure that the hot melt adhesive will not be wasted due to leakage during the delivery process, and at the same time prevent equipment failure or safety accidents that may be caused by colloid leakage. During the installation process, when the colloid delivery tube is inserted into the glue inlet channel 4 and contacts the annular protrusion 6, the O-ring sealing ring 7 will be squeezed radially. This squeezing causes the O-ring to deform, its diameter is reduced, and its cross-sectional shape is also changed. This deformation allows the O-ring to fit more closely on the surface of the delivery tube and the annular protrusion 6, thereby filling the small gap between the two and achieving effective sealing.

[0043] Embodiment 2:

[0044] Compared with the traditional end face extrusion design, the "loop bundle extrusion connection gap 8" design of the utility model has significant advantages. Specifically:

[0045] Side intrusion extrusion: In the present invention, the O-ring seal ring 7 is extruded between the colloid delivery tube and the annular protrusion 6 by side intrusion. This design utilizes the arc-shaped side of the O-ring seal ring 7 itself, making it easier to cut in and form a tight extrusion connection. This side extrusion method not only reduces the force required for installation, but also improves the stability and reliability of the seal.

[0046] Easy installation: Due to the side-invasive extrusion design, there is no need to apply excessive force in the end face direction during installation, nor is there any need for complex mechanical equipment, which helps to simplify the installation process and reduce costs and time consumption.

[0047] For example, in the furniture manufacturing industry, traditional hot melt adhesive nozzles often need to be connected with the help of professional mechanical equipment during the installation process, and the end face extrusion method can easily cause the O-ring sealing ring 7 to be damaged or the sealing effect to be unstable. However, the hot melt adhesive nozzle using the "ring bundle extrusion connection gap 8" design of the utility model only needs manual operation during the installation process, and there is no need to use mechanical equipment to relatively forcefully squeeze the end face of the O-ring sealing ring for sealing. At the same time, due to the side invasive extrusion method, the O-ring sealing ring 7 can be more evenly distributed in the connection gap, thereby achieving a more stable sealing effect. This not only improves production efficiency, but also reduces maintenance costs and the frequency of replacing sealing rings.

[0048] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical 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. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0049] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. An optimized hot melt adhesive nozzle, comprising a hot melt adhesive nozzle body, the hot melt adhesive nozzle body comprising a glue feeding surface, and the glue feeding surface is provided with more than one glue feeding mechanism, characterized in that: The glue feeding mechanism comprises a glue feeding channel, an annular groove, an annular convex column and an O-ring sealing ring; A glue feeding channel is arranged on the glue feeding surface of the hot melt glue nozzle body; On the glue inlet surface of the hot melt glue nozzle body, an annular groove is provided on the annular outer surface of the glue inlet channel; The annular groove comprises an annular inner side surface and an annular outer side surface, and an annular convex column is formed between the annular inner side surface of the annular groove and the glue feeding channel; The O-ring sealing ring is clamped in the annular groove, the annular outer side surface of the O-ring sealing ring is in close contact with and fixedly connected to the annular outer side surface of the annular groove, and an annular ring bundle extrusion connection gap is formed between the annular inner side surface of the O-ring sealing ring and the annular outer side surface of the annular boss.

2. An optimized hot melt adhesive nozzle according to claim 1, characterized in that: The depth of the annular groove is between 50% and 100% of the thickness of the O-ring sealing ring to ensure that the O-ring sealing ring can be fully embedded therein and properly squeezed.

3. The optimized hot melt adhesive nozzle according to claim 1, characterized in that: The inner diameter of the glue inlet channel is between 5mm and 15mm.

4. The optimized hot melt adhesive nozzle according to claim 1, characterized in that: The glue feeding surface is provided with 2 to 4 glue feeding mechanisms, which are evenly distributed around the central axis of the hot melt glue nozzle, and the intervals between each glue feeding mechanism are equal.

5. The optimized hot melt adhesive nozzle according to claim 1, characterized in that: The hot melt adhesive nozzle body is made of high temperature resistant alloy steel or stainless steel.

6. The optimized hot melt adhesive nozzle according to claim 1, characterized in that: The O-ring sealing ring is made of silicone rubber or fluororubber.

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