Hot melt glue gun head structure

Abstract

The invention belongs to the technical field of hot melt glue gun heads, and particularly relates to a hot melt glue gun head structure which comprises a gun head, one side of the gun head is rectangular, the other end of the gun head is round, a glue outlet is formed in the round end, heaters are fixedly connected to the two side walls of the interior of the gun head, and heating pipes are fixedly inserted into the heaters. And a sleeve is fixedly connected to the center of the gun head. According to the invention, the gun head is made of high-thermal-conductivity metal and is matched with the heating tube with a specific layout, so that the hot-melting plastic rod can be quickly and efficiently melted, and the waiting time is shortened. Glue discharging can be accurately controlled through the design of the slits, excessive or uneven glue discharging is avoided, and the bonding quality is improved. The low-heat-conduction sleeve and the heat insulation cotton reduce heat loss and improve the energy utilization rate. The hot melt glue gun is compact in overall structure, is matched with the high-strength engineering plastic shell, is convenient to carry, ensures the use safety, and meets the requirements on the hot melt glue gun in various scenes.

Description

Technical Field

[0001] The invention relates to the technical field of hot melt glue gun tips, in particular to a hot melt glue gun tip structure. Background Art

[0002] Hot melt glue guns, as a commonly used bonding tool, play a vital role in many scenarios such as industrial production, hand-made and daily life. Traditional hot melt glue guns have some problems in design and use that are difficult to ignore, which also provides an opportunity for the research and development of new hot melt glue gun head structures.

[0003] Early hot melt glue guns mostly used a long straight heating pipe design to melt the glue strips. In this design, the hot meltable glue strip (rod) needs to go through a long heating path to ensure that it has enough time to absorb heat and completely melt into liquid, and then discharge the liquid glue from the outlet for bonding. However, this traditional design makes the glue gun very large. This not only brings great inconvenience to users in terms of storage and carrying, and increases the demand for storage space, but also makes it difficult to flexibly use it in some working environments with limited operating space.

[0004] In addition, the heating efficiency of traditional hot melt glue guns is low. Due to the long heating pipe, heat is easily lost during the transmission process, resulting in increased heating energy consumption, which also prolongs the melting time of the glue strip and reduces work efficiency. Moreover, the long pipe design also makes the internal structure of the glue gun more complicated, increasing the production cost and maintenance difficulty.

[0005] In actual use, traditional hot melt glue guns cannot accurately control the amount of glue. When the glue strip melts, it flows out under pressure. There is a lack of effective blocking and control mechanisms, and excessive or uneven glue often occurs, affecting the bonding effect and product quality. Especially in some fine operations that require high bonding accuracy, such as bonding of electronic components and craft production, the disadvantages of traditional hot melt glue guns are more obvious.

[0006] With the continuous advancement of industrial technology and the growing demand for portable, efficient and precise tools, the development of a hot melt glue gun head structure with compact size, rapid heating and precise glue control has become an urgent need for the development of the industry. This hot melt glue gun head structure was born based on this background, aiming to solve the above problems of traditional hot melt glue guns and provide users with a more convenient and efficient use experience. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a hot melt glue gun head structure, which solves the problems raised in the above background technology.

[0009] (II) Technical solution

[0010] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0011] A hot melt glue gun head structure includes a gun head, wherein one end of the gun head is rectangular and the other end is circular, a glue outlet is provided at one circular end, heaters are fixedly connected to the inner two side walls of the gun head, a heating tube is inserted and fixed in the heater, a sleeve is fixedly connected to the center of the gun head, a hot melt plastic rod is sleeved and installed in the sleeve, a cavity is formed inside the gun head, a slit is provided in the cavity, and the cavity is connected to the glue outlet through the slit; in an unheated state, the hot melt plastic rod is straight in the cavity, and in a heated state, the end of the hot melt plastic rod is bent in the cavity; the outside of the gun head is wrapped with a shell, and a layer of heat insulation cotton is sandwiched between the shell and the gun head.

[0012] Furthermore, there are two groups of heating tubes, which are symmetrically arranged with respect to the central axis of the gun head, and each group of heating tubes has three heating tubes which are arranged at equal intervals.

[0013] Furthermore, the gun tip is made of high thermal conductivity metal copper / aluminum.

[0014] Furthermore, the sleeve is made of low thermal conductivity metal iron / stainless steel.

[0015] Furthermore, the hot-melt plastic rod is PE / PP.

[0016] Furthermore, the slit is vertically flat, and its width is smaller than the diameter of the hot-melt plastic rod.

[0017] Furthermore, the diameter of the hot-melt plastic rod is smaller than the diameter of the sleeve.

[0018] Furthermore, the shell is made of high-strength engineering plastic, and the thermal insulation cotton is ceramic fiber thermal insulation cotton.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides a hot melt glue gun head structure, which has the following beneficial effects:

[0021] The present invention uses a high thermal conductivity metal in the gun head and a heating tube with a specific layout, which can melt the hot-melt plastic rod quickly and efficiently and reduce waiting time. The slit design can accurately control the glue discharge, avoid excessive or uneven glue discharge, and improve the bonding quality. The low thermal conductivity sleeve and thermal insulation cotton reduce heat loss and improve energy utilization. The overall structure is compact, and the shell is made of high-strength engineering plastics, which is convenient to carry and ensures safe use, meeting the needs of hot melt glue guns in various scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a side view structural schematic diagram of the present invention;

[0024] Figure 3 For the present invention Figure 2 Schematic diagram of the AA structure;

[0025] Figure 4 For the present invention Figure 2 Schematic diagram of the BB structure;

[0026] Figure 5 It is a schematic diagram of the installation structure of the three-dimensional structure of the present invention.

[0027] In the figure: 1. gun head; 2. glue outlet; 3. heater; 4. heating tube; 5. sleeve; 6. hot-melt plastic rod; 7. cavity; 8. slit; 9. shell; 10. thermal insulation cotton. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0029] Example

[0030] like Figure 1-5 As shown, a hot melt glue gun tip structure proposed in one embodiment of the present invention includes a gun tip 1, which is the main frame of the entire hot melt glue gun tip structure, with two side walls inside fixedly connected to a heater 3, a sleeve 5 fixedly connected at the center, and a shell 9 wrapped around the outside of the gun tip 1, with heat insulation cotton 10 sandwiched between the two.

[0031] The gun head 1 is made of high thermal conductivity copper / aluminum, which can quickly transfer the heat generated by the heating tube 4 in the heater 3 to various internal parts, providing a good thermal environment for the melting of the hot-melt plastic rod 6. The rectangular shape at one end is convenient for connection and fixation with the glue gun body, and the glue outlet 2 opened at the circular end is the channel for the liquid glue to be discharged.

[0032] The glue outlet 2 is provided at one circular end of the gun head 1 and is connected to the cavity 7 via a slit 8 .

[0033] As the final discharge site of the hot melt adhesive, the melted liquid adhesive can accurately reach the site where bonding is required, thus achieving the bonding function.

[0034] The heater 3 is fixedly connected to the inner side walls of the gun head 1 , and a heating tube 4 is inserted and fixed therein.

[0035] The heating tube 4 is carried and the heat generated by the heating tube 4 is effectively transferred to the inside of the gun head 1 , so as to provide necessary heat for melting the hot-melt plastic rod 6 .

[0036] There are two groups of heating tubes 4, which are symmetrically arranged with respect to the central axis of the gun head 1, with three tubes in each group arranged at equal intervals, and are plugged and fixed in the heater 3.

[0037] After being powered on, heat is generated, which is the heat source of the entire hot melt glue gun head structure. The heat is transferred to the hot melt plastic rod 6 through the heater 3 and the gun head 1 to melt it.

[0038] The sleeve 5 is fixedly connected to the center of the gun head 1 , and a hot-melt plastic rod 6 is sleeved and installed in the sleeve 5 .

[0039] It is made of low thermal conductivity metal iron / stainless steel, which plays the role of positioning and guiding the hot-melt plastic rod 6, while reducing the heat transfer to the rear end of the hot-melt plastic rod 6, ensuring that the front end of the glue stick melts in a specific area.

[0040] The hot-melt plastic rod 6 is sleeved and installed in the sleeve 5, and the end portion of the hot-melt plastic rod 6 is bent in the cavity 7 under heating.

[0041] The raw material of the hot melt adhesive is melted under the heat generated by the heating tube 4 to form liquid adhesive for bonding.

[0042] The cavity 7 is formed by the inner space of the gun head 1 , a slit 8 is provided in the cavity 7 , and the glue outlet 2 is connected via the slit 8 .

[0043] It provides space for the melting of the hot-melt plastic rod 6 and the flow of liquid glue. At the same time, during the heating process, it accommodates the bent end of the glue stick and cooperates with the slit 8 to separate the liquid glue and the unmelted glue stick.

[0044] The slit 8 is arranged in the cavity 7 , is in a vertical flat shape, has a width smaller than the diameter of the hot-melt plastic rod 6 , and connects the cavity 7 and the glue outlet 2 .

[0045] Only liquid glue is allowed to pass through, blocking the hot-melt plastic rod 6 that is not completely melted, so that under the pressure generated by the subsequent glue sticks continuously advancing, the liquid glue can be smoothly discharged from the glue outlet 2, thereby achieving control of the glue discharge.

[0046] The shell 9 is wrapped around the outside of the gun head 1 .

[0047] It is made of high-strength engineering plastics to protect the internal structure of the gun head 1 and prevent it from being hit and damaged by the outside, while providing a hand-held portion for the user to facilitate operation.

[0048] The heat insulating cotton 10 is sandwiched between the shell 9 and the gun head 1 .

[0049] Ceramic fiber insulation cotton is used to reduce the heat dissipation of the gun head 1 to the outside, reduce the surface temperature of the shell 9, avoid burns to the user during operation, and improve energy efficiency. ;

[0050] When the hot melt glue gun is powered on, the heating tube 4 installed in the heater 3 on both sides of the gun head 1 begins to heat up. The gun head 1 is made of a high thermal conductivity metal (such as copper / aluminum), which can quickly transfer heat to the entire gun head. The hot melt plastic rod 6 (made of PE / PP) in the central sleeve 5 (made of low thermal conductivity metal iron / stainless steel) of the gun head 1 begins to melt due to the heat. During the heating process, the end of the hot melt plastic rod 6 that is not completely melted bends in the cavity 7. Since a vertical flat slit 8 with a width smaller than the diameter of the hot melt plastic rod 6 is provided in the cavity 7, the glue stick that is not completely melted is blocked by the slit 8, while the molten liquid glue can flow to the glue outlet 2 through the slit 8. The shell 9 made of high-strength engineering plastic wrapped on the outside of the gun head 1, and the ceramic fiber insulation cotton 10 between the shell 9 and the gun head 1, not only protect the internal structure, but also reduce heat loss, and ultimately achieve the purpose of precise glue discharge;

[0051] Among them, one end of the sleeve 5 is connected to the glue stick storage bin, and this connection is usually tight and stable. In order to prevent the glue stick from shifting during the transportation process, a threaded connection or a bayonet connection method is adopted to ensure that the glue stick can accurately enter the inside of the sleeve. In the storage bin, there is also a propulsion device, such as a spring or a piston structure. As the glue stick is continuously consumed, the propulsion device can continuously apply thrust to the glue stick, allowing the glue stick to be stably transported into the sleeve to maintain the continuity of the glue supply; this part is not drawn in the figure.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hot melt glue gun head structure, comprising a gun head (1), characterized in that: The shape of the gun head (1) is rectangular on one side and circular on the other end, and a glue outlet (2) is provided at one of the circular ends. The inner side walls of the gun head (1) are fixedly connected with heaters, and a heating tube (4) is inserted and fixed in the heater (3). A sleeve (5) is fixedly connected to the center of the gun head (1), and a hot-melt plastic rod (6) is sleeved and installed in the sleeve (5). A cavity (7) is formed inside the gun head (1), and a slit (8) is provided in the cavity (7). The cavity (7) is connected to the glue outlet (2) through the slit (8); in an unheated state, the hot-melt plastic rod (6) is straight in the cavity (7), and in a heated state, the end of the hot-melt plastic rod (6) is bent in the cavity (7); the outside of the gun head (1) is wrapped with a shell (9), and a layer of heat insulation cotton (10) is sandwiched between the shell (9) and the gun head (1).

2. A hot melt glue gun head structure according to claim 1, characterized in that: There are two groups of heating tubes (4), which are symmetrically arranged with respect to the central axis of the gun head (1), and each group of heating tubes (4) has three tubes, which are arranged at equal intervals.

3. A hot melt glue gun head structure according to claim 1, characterized in that: The gun head (1) is made of high thermal conductivity metal copper / aluminum.

4. A hot melt glue gun head structure according to claim 1, characterized in that: The sleeve (5) is made of low thermal conductivity metal iron / stainless steel.

5. A hot melt glue gun head structure according to claim 1, characterized in that: The hot-melt plastic rod (6) is PE / PP.

6. A hot melt glue gun head structure according to claim 1, characterized in that: The slit (8) is vertically flat, and its width is smaller than the diameter of the hot-melt plastic rod (6).

7. A hot melt glue gun head structure according to claim 1, characterized in that: The diameter of the hot-melt plastic rod (6) is smaller than the diameter of the sleeve (5).

8. A hot melt glue gun head structure according to claim 1, characterized in that: The shell (9) is made of high-strength engineering plastics, and the thermal insulation cotton (10) is ceramic fiber thermal insulation cotton.

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