Hot melting device

Abstract

The utility model belongs to the technical field of hot melters, and particularly relates to a hot melter, which comprises a grip and a heating block, a heat insulation device is arranged between the grip and the heating block, a control circuit for controlling the heating block is arranged in the grip, the heat insulation device comprises a radiating fin and a heat insulation plate which are detachably connected, the heat insulation plate is detachably connected with the grip through a fastener, and the heat insulation plate is arranged in the grip. The heat dissipation sheet is arranged between the heat insulation plate and the heating block, the heat insulation plate extends towards the grip to form a positioning convex edge, a positioning groove matched with the positioning convex edge is formed in the grip, and the positioning convex edge is matched with the positioning groove to enable the heat insulation plate and the grip to be in positioning connection; the utility model aims to provide the hot melting device which is simple in structure, convenient to install and long in service life.

Description

Technical Field

[0001] This utility model belongs to the field of hot melters, and specifically relates to a hot melter. Background Technology

[0002] A hot melt machine is a professional welding tool used to heat and melt thermoplastic pipes and molds for connection. The working principle of a hot melt machine is mainly to transfer heat to the welding surfaces of thermoplastic pipes and molds through electrothermal methods, causing the surfaces to melt, and then the two molten surfaces are fused, solidified, and joined together.

[0003] Most hot melt melters include a handle and a heating block, with a heat insulation device between the heating block and the handle. This heat insulation device reduces the temperature of the handle during use and prevents deformation. For example, Chinese Utility Model Patent CN 202222446305.8 discloses a hot melt melter comprising: a handle, a control module, a heat insulation component, and a heating assembly. The control module is assembled in the handle; the heat insulation component is connected to the handle; the heating assembly is connected to the end of the heat insulation component away from the handle; the control module and the heating assembly are spaced apart at both ends of the heat insulation component; and the control module and the heating assembly are electrically connected via wires. The heating assembly is used for hot melting plastic tubing. This structure effectively controls the heat transfer from the heating assembly to the control module, ensuring the control module operates at a suitable temperature.

[0004] As shown in the accompanying drawings of the utility model specification, the fasteners pass through the bracket and the heat insulation component in sequence and are connected to the handle. Since most of the fasteners are made of metal, they are prone to overheating after prolonged use, which can cause deformation at the contact point between the handle and the fasteners, affecting the service life of the hot melt. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of this utility model is to provide a hot melter that is simple in structure, easy to install and has a long service life.

[0006] The purpose of this utility model is achieved as follows:

[0007] A heat exchanger includes a handle and a heating block, with a heat insulation device disposed between the handle and the heating block. A control circuit for controlling the heating block is disposed in the handle. The heat insulation device includes a detachably connected heat sink and a heat insulation plate. The heat insulation plate is detachably connected to the handle by fasteners. The heat sink is disposed between the heat insulation plate and the heating block. The heat insulation plate extends toward the handle to form a positioning protrusion. A positioning groove adapted to the positioning protrusion is provided on the handle. The positioning protrusion and the positioning groove cooperate to position the heat insulation plate and the handle.

[0008] The present invention is further configured such that: an inclined guide surface is provided on the outer periphery of the positioning protrusion or positioning groove, and the positioning protrusion is guided into the positioning groove by the guide surface.

[0009] The present invention is further configured such that: the handle, the heat insulation plate and the heat sink are respectively provided with a first connecting groove, a second connecting groove and a third connecting groove, the first connecting groove, the second connecting groove and the third connecting groove are connected in sequence, the control circuit can pass through the first connecting groove, the second connecting groove and the third connecting groove and be electrically connected to the heating block, the second connecting groove is provided in the positioning protrusion, or the positioning protrusion is provided on the outer periphery of the second connecting groove.

[0010] The present invention is further configured such that: the positioning groove is the first connecting groove, the heat insulation plate extends toward the handle to form a plurality of positioning protrusions, the positioning protrusions are disposed on the outer periphery of the second connecting groove and can respectively abut against the side wall of the first connecting groove.

[0011] The present invention is further configured such that: the grip and the heat insulation plate are respectively provided with a first mounting hole and a second mounting hole, the fastener passes through the first mounting hole and the second mounting hole and fixes the heat insulation plate and the grip respectively, and the side wall of the second mounting hole extends into the second connecting groove to form a side protrusion.

[0012] The present invention is further configured such that: the end of the second mounting hole extends toward the handle to form a boss, the end of the boss is provided with a support end face, the fastener controls the heat insulation plate to be fixed relative to the handle, and makes the support end face abut against the handle.

[0013] The present invention is further configured such that: a reinforcing rod is provided on the grip, and the reinforcing rod is respectively connected to both sides of the first connecting groove.

[0014] The present invention is further configured such that: the control circuit is provided with a knob for controlling the heating power of the heating block, the knob is located on the side of the handle, the handle extends outward from the knob to form a ring or arc-shaped protective ridge, the protective ridge can protect the knob, and a control groove for controlling the rotation of the knob is provided on the side or side wall of the protective ridge.

[0015] The present invention is further configured such that: a master control switch for controlling the heating block is provided on the control circuit, and a storage groove is provided on the side wall of the handle, with the master control switch passing through the storage groove.

[0016] The present invention is further configured to include a support device, which is detachably connected to the handle and can support the handle. The support device includes a vertical pole with two rotatably foldable support legs rotatably mounted on the vertical pole. The two support legs are provided with meshing gears that enable the two support legs to rotate synchronously.

[0017] The advantages of this utility model compared to the prior art are:

[0018] 1. The heat dissipation fins set between the heat insulation plate and the heating block in this utility model help reduce the temperature of the heat insulation plate and the handle during use. The structure is simple and can avoid overheating damage to the handle. Although the heat insulation plate is detachably connected to the handle by fasteners, the heat insulation plate and the handle are respectively provided with positioning protrusions and positioning grooves. These not only facilitate the positioning and installation of the heat insulation plate and the handle, but also disperse the relative force between the fasteners and the handle when the heating plate is under force during use. This prevents the fasteners from being damaged by force after the contact position with the handle is stably raised, which helps to extend the service life of the heat melter.

[0019] 2. In this utility model, in order to ensure stable installation of the heat insulation plate and the handle, the positioning protrusion and the positioning groove need to fit tightly. The guide surface facilitates the quick connection and fit between the positioning protrusion and the positioning groove, which is convenient for the assembly and production of the hot melt machine. Since the second connecting groove is set in the positioning protrusion, or the positioning protrusion is set on the outer periphery of the second connecting groove, it is beneficial to improve the connection strength between the heat insulation plate and the handle, and also beneficial to disperse the stress points of the heat insulation plate and the handle, avoid damage to the positioning protrusion and the positioning groove, and extend the service life of the hot melt machine.

[0020] 3. In this utility model, since the positioning groove is the first connecting groove, it is beneficial to simplify the structure of the handle and facilitate the production and processing of the handle. The positioning protrusions that abut against the side wall of the first connecting groove are beneficial to dispersing the force on the positioning protrusions and positioning parts, avoiding damage to the positioning protrusions and positioning parts, and extending the service life of the hot melt machine. The side protrusions are beneficial to improving the structural strength of the second mounting hole, avoiding damage to the second mounting hole caused by fasteners during use, and extending the service life of the hot melt machine. The reinforcing rod is beneficial to improving the structural strength of the handle, avoiding damage to the side wall of the first connecting groove during use, and extending the service life of the hot melt machine.

[0021] 4. The knob structure in this utility model allows users to flexibly adjust the heating power of the heating block, thereby regulating the temperature of the heating block during use, which is convenient for users. The protective protrusion can reduce accidental triggering of the knob due to accidental touch, and prevent the temperature of the heating block from changing due to accidental touch of the knob during use, which is convenient for users. The master control switch set in the storage slot can reduce the occurrence of accidental touch of the master control switch, and prevent the hot melter from being accidentally turned off during use, which is convenient for the use of the hot melter.

[0022] 5. The two foldable support legs in this utility model facilitate the storage, handling, and transportation of the support device and the hot melter. Furthermore, since the two support legs are equipped with meshing gears, they can rotate synchronously, making it easy for the support device to be quickly unfolded and folded, which is convenient for users. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is an exploded view of the present invention;

[0025] Figure 3 This is a cross-sectional view of the present invention;

[0026] Figure 4 This is one of the structural schematic diagrams of the grip in this utility model;

[0027] Figure 5 This is the second schematic diagram of the grip structure in this utility model;

[0028] Figure 6 This is one of the structural schematic diagrams of the heat insulation plate in this utility model;

[0029] Figure 7 This is the second schematic diagram of the heat insulation plate in this utility model;

[0030] Figure 8 This is one of the structural schematic diagrams of the heat sink in this utility model;

[0031] Figure 9 This is the second schematic diagram of the heat sink structure in this utility model;

[0032] Figure 10 This is a schematic diagram of the structure of the heat insulation sheet in this utility model;

[0033] Figure 11 This is a schematic diagram of the support device in this utility model;

[0034] Figure 12 This is a schematic diagram of the heating block in this utility model.

[0035] The labels in the diagram have the following meanings: 1-Grip; 11-Inner cavity; 12-First connecting groove; 13-Protective protrusion; 14-Control groove; 15-Storage groove; 16-Grip part; 17-Insertion hole; 18-Side protrusion; 19-First mounting hole; 121-Reinforcing rod; 2-Heating block; 21-Third support protrusion; 22-Third connecting hole; 3-Heat insulation device; 31-Heat insulation plate; 32-Heat dissipation fin; 33-Heat insulation plate; 311-Positioning protrusion; 312-Second connecting groove; 313-Counterhead hole; 314-Support end face; 315-Second mounting hole; 316-Groove; 317-First support protrusion; 318-Heat insulation groove; 321-Third connecting groove; 322-Heat dissipation hole; 323-First connecting hole; 324-Positioning groove;

[0036] 325 - Second support protrusion; 331 - Fourth connecting groove; 332 - Second connecting hole; 333 - Mounting part;

[0037] 4-Support device; 41-Upright pole; 42-Support leg; 411-First support flange; 412-Modular groove;

[0038] 413 - Connector; 421 - Second support flange; 422 - Gear; 51 - Controller; 52 - Knob;

[0039] 53-Master control switch; 54-Temperature measuring device. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0041] See Figures 1 to 12 As shown, a heat exchanger includes a handle 1 and a heating block 2. A heat insulation device 3 is disposed between the handle 1 and the heating block 2. A control circuit for controlling the heating block 2 is disposed in the handle 1. The heat insulation device 3 includes a detachably connected heat sink 32 and a heat insulation plate 31. The heat insulation plate 31 is detachably connected to the handle 1 by fasteners. The heat sink 32 is disposed between the heat insulation plate 31 and the heating block 2. The heat insulation plate 31 extends toward the handle 1 to form a positioning flange 311. A positioning groove 324 adapted to the positioning flange 311 is provided on the handle 1. The positioning flange 311 and the positioning groove 324 cooperate to position the heat insulation plate 31 and the handle 1. In this structure, the heat insulation plate 31 and the heating block 2 are connected in a specific manner. The heat sink 32 between the heat blocks 2 helps to reduce the temperature of the heat insulation plate 31 and the handle 1 during use. The structure is simple and can prevent the handle 1 from being damaged by overheating. Although the heat insulation plate 31 is detachably connected to the handle 1 by fasteners, the heat insulation plate 31 and the handle 1 are respectively provided with positioning protrusions 311 and positioning grooves 324. This not only facilitates the positioning and installation of the heat insulation plate 31 and the handle 1, but also, when the heating plate is subjected to force during use, the positioning protrusions 311 and positioning grooves 324 can disperse the relative force between the fasteners and the handle 1, preventing the fasteners from being damaged by force after the contact position with the handle 1 is stably raised, which helps to extend the service life of the heat melter.

[0042] In order to ensure that the heat insulation plate 31 and the handle 1 are stably installed, the positioning protrusion and the positioning groove 324 need to be tightly fitted. Preferably, the outer periphery of the positioning protrusion 311 or the positioning groove 324 is provided with an inclined guide surface. The positioning protrusion 311 is guided into the positioning groove 324 through the guide surface. The setting of the guide surface facilitates the quick connection and fit between the positioning protrusion and the positioning groove 324, which is convenient for the assembly and production of the hot melt machine.

[0043] In this invention, a heat insulation sheet 33 is preferably detachably provided between the heat sink 32 and the heating block 2. The heat insulation sheet 33 can reduce the temperature of the heat sink 32. Preferably, a temperature measuring device 54 is detachably provided on the side of the heat insulation sheet 33 away from the heating block 2. The manufacturer can understand the relationship between the temperature of the heating block 2 and the temperature at the detection position of the temperature measuring device 54 by testing. This structure can reduce the maximum temperature that the temperature measuring device 54 needs to detect during use, which is conducive to using a temperature measuring device 54 with a smaller upper limit and thus helps to reduce production costs.

[0044] In this embodiment, the handle 1 and the heat insulation plate 31 are respectively provided with a first mounting hole 19 and a second mounting hole 315. A set of fasteners passes through the first mounting hole 19 and the second mounting hole 315 and fixes the heat insulation plate 31 and the handle 1 relative to each other. The heat insulation plate 31, the heat sink 32, the heat insulation plate 33 and the heating block 2 are respectively provided with a countersunk hole 313, a first connecting hole 323, a second connecting hole 332 and a third connecting hole 22. Another set of fasteners passes through the countersunk hole 313, the first connecting hole 323, the second connecting hole 332 and the third connecting hole 22 and fixes the heat insulation plate 31, the heat sink 32, the heat insulation plate 33 and the heating block 2 relative to each other.

[0045] The end of the second mounting hole 315 extends toward the handle 1 to form a boss. The end of the boss is provided with a support end face 314. The fastener controls the heat insulation plate 31 to be fixed relative to the handle 1, and makes the support end face 314 abut against the handle 1. The boss helps to prevent the bolt from being subjected to additional bending stress and facilitates the machining difficulty of the end of the second mounting hole 315.

[0046] Preferably, the heating block 2 extends toward the heat insulation sheet 33 to form a third support protrusion 21, which abuts against the heat insulation sheet 33 and creates a gap between the heating block 2 and the heat insulation sheet 33; the heat sink 32 extends toward the heat insulation sheet 33 to form a second support protrusion 325, which abuts against the heat insulation sheet 33 and creates a gap between the heat sink 32 and the heat insulation sheet 33; the heat insulation plate 31 extends toward the heat sink 32 to form a first support protrusion 317, and the heat sink 32 is provided with a positioning groove 324 that cooperates with the first support protrusion 317. The first support protrusion 317 and the positioning groove 324 cooperate to position the heat insulation plate 31 and the heat sink 32 and create a gap between the heat insulation plate 31 and the heat sink 32. All of the above gaps can conduct heat and reduce the temperature of the handle 1 during use.

[0047] In this embodiment, the countersunk hole 313, the first connecting hole 323, and the third connecting hole 22 are respectively inserted into the first support protrusion 317, the second support protrusion 325, and the third support protrusion 21.

[0048] The handle 1, the heat insulation plate 31, and the heat sink 32 are respectively provided with a first connecting groove 12, a second connecting groove 312, and a third connecting groove 321. The first connecting groove 12, the second connecting groove 312, and the third connecting groove 321 are connected in sequence. The control circuit can pass through the first connecting groove 12, the second connecting groove 312, and the third connecting groove 321 and be electrically connected to the heating block 2. Preferably, the second connecting groove 312 is provided in the positioning protrusion 311, or the positioning protrusion 311 is provided on the outer periphery of the second connecting groove 312. This structure is beneficial to improving the connection strength between the heat insulation plate 31 and the handle 1, and is beneficial to dispersing the stress points of the heat insulation plate 31 and the handle 1, avoiding damage to the positioning protrusion 311 and the positioning groove 324, and extending the service life of the hot melt.

[0049] In this embodiment, the heat insulation sheet 33 is provided with a fourth connecting groove 331 that communicates with the third connecting groove 321. The fourth connecting groove 331 is provided with a mounting part 333 on its side, and the temperature measuring device 54 is provided on the side of the mounting part 333 away from the heating block 2.

[0050] In this utility model, the positioning groove 324 is the first connecting groove 12. The heat insulation plate 31 extends towards the handle 1 to form a plurality of positioning protrusions 311. The positioning protrusions 311 are disposed on the outer periphery of the second connecting groove 312 and can respectively abut against the side wall of the first connecting groove 12. This structure is conducive to simplifying the structure of the handle 1 and facilitating the production and processing of the handle 1. The positioning protrusions that abut against the side wall of the first connecting groove 12 are conducive to dispersing the force on the positioning protrusions and positioning parts, avoiding damage to the positioning protrusions and positioning parts, and helping to extend the service life of the hot melt.

[0051] The side wall of the second mounting hole 315 extends into the second connecting groove 312 to form a side protrusion 18. The side protrusion 18 helps to improve the structural strength of the second mounting hole 315, avoids damage to the second mounting hole 315 caused by fasteners during use, and helps to extend the service life of the hot melt. In this embodiment, a groove 316 adapted to the side protrusion 18 is preferably provided between the positioning protrusions 311. This structure helps to tightly connect the handle 1 and the heat insulation plate 31 and improves the connection strength between the handle 1 and the heat insulation plate 31.

[0052] Preferably, the grip 1 is provided with a reinforcing rod 121, which is connected to both sides of the first connecting groove 12. The reinforcing rod 121 helps to improve the structural strength of the grip 1, avoid damage to the side wall of the first connecting groove 12 during use, and help to extend the service life of the hot melt.

[0053] The second connecting groove 312 is provided with a heat insulation groove 318 around its periphery. The heat insulation groove 318 extends in the direction of the second connecting groove 312. The heat insulation groove 318 can reduce the temperature of the outer periphery of the heat insulation plate 31. The third connecting groove 321 is provided with a heat dissipation hole 322 around its periphery. The heat dissipation hole 322 connects the third connecting groove 321 to the outer wall of the heat sink 32, which is beneficial to improving the heat dissipation efficiency of the heat sink 32.

[0054] The control circuit described in this utility model is equipped with a knob 52 for controlling the heating power of the heating block 2. The knob 52 is located on the side of the handle 1, and the handle 1 extends outward from the knob 52 to form a ring-shaped or arc-shaped protective ridge 13. The protective ridge 13 can protect the knob 52, and a control groove 14 for controlling the rotation of the knob 52 is provided on the side or side wall of the protective ridge 13. The structure of the knob 52 allows the user to flexibly adjust the heating power of the heating block 2, thereby adjusting the temperature of the heating block 2 during use, which is convenient for the user. The setting of the protective ridge 13 can reduce the accidental triggering of the knob 52 due to accidental touch, and prevent the temperature of the heating block 2 from changing due to accidental touch of the knob 52 during use, which is convenient for the user.

[0055] One or more control grooves 14 are provided on the side or sidewall of the protective protrusion 13. In this embodiment, the grip 1 extends to form two protective protrusions 13, which are arranged in a ring. Two control grooves 14 are formed between the ends of the two protective protrusions 13. In this embodiment, the knob 52 can be set on the left and right sides of the grip 1, or it can be set on the upper and lower sides of the grip 1.

[0056] The control circuit is equipped with a master control switch 53 for controlling the heating block 2. A storage groove 15 is provided on the side wall of the handle 1, and the master control switch 53 is inserted into the storage groove 15. The master control switch 53 is designed to facilitate the quick closing of the hot melt and make it convenient for the user. Since the master control switch 53 is located in the storage groove 15, this structure can reduce the occurrence of accidental activation of the master control switch 53, prevent the hot melt from being accidentally shut down during use, and facilitate the use of the hot melt.

[0057] In this embodiment, the handle 1 is provided with an inner cavity 11. The first connecting groove 12 is provided on the side wall of the inner cavity 11 and connects the inner cavity 11 with the second connecting groove 312. The control circuit includes a controller 51 provided in the inner cavity 11, a knob 52 and a master switch 53 that are mechanically or electrically connected to the controller 51. This structure is a common control structure in hot melt machines. Therefore, although the present invention does not specifically describe the specific models and connection methods of the controller 51, the knob 52 and the master switch 53, those skilled in the art can implement the technical solution of the present invention based on their own knowledge and existing technology.

[0058] This utility model also includes a support device 4, which is detachably connected to the handle 1 and can support the handle 1. The support device 4 includes a pole 41, on which two foldable support legs 42 are rotatably mounted. The two support legs 42 are provided with meshing gear parts 422, which can make the two support legs 42 rotate synchronously. The two foldable support legs 42 facilitate the storage, handling, and transportation of the support device 4 and the hot melter. Furthermore, since the two support legs 42 are provided with meshing gear parts 422, the two support legs 42 can rotate synchronously, which facilitates the quick unfolding and folding of the support device 4, making it convenient for users.

[0059] In this embodiment, the upper end of the upright 41 is provided with a plug-in part 413, and the lower side of the handle is provided with a plug-in hole 17 adapted to the plug-in part 413. The lower end of the upright 41 extends to form a first support protrusion 411, and the first support protrusion 411 surrounds to form a movable groove 412. A gear part 422 is provided at one end of the support leg 42 and is located in the movable groove 412. A second support protrusion 421 is provided on the lower side of the other end of the support leg 42. The first support protrusion 411 and the second support protrusions 421 on the two support legs 42 are triangularly distributed.

[0060] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A heat melter, comprising a handle (1) and a heating block (2), wherein a heat insulation device (3) is provided between the handle (1) and the heating block (2), and a control circuit for controlling the heating block (2) is provided in the handle (1), characterized in that: The heat insulation device (3) includes a detachably connected heat sink (32) and a heat insulation plate (31). The heat insulation plate (31) is detachably connected to the handle (1) by fasteners. The heat sink (32) is disposed between the heat insulation plate (31) and the heating block (2). The heat insulation plate (31) extends toward the handle (1) to form a positioning protrusion (311). The handle (1) is provided with a positioning groove (324) that matches the positioning protrusion (311). The positioning protrusion (311) and the positioning groove (324) cooperate to position the heat insulation plate (31) and the handle (1).

2. The hot melt machine according to claim 1, characterized in that: An inclined guide surface is provided on the outer periphery of the positioning protrusion (311) or positioning groove (324), and the positioning protrusion (311) is guided into the positioning groove (324) through the guide surface.

3. A hot melt machine according to claim 1 or 2, characterized in that: The handle (1), heat insulation plate (31) and heat sink (32) are respectively provided with a first connecting groove (12), a second connecting groove (312) and a third connecting groove (321). The first connecting groove (12), the second connecting groove (312) and the third connecting groove (321) are connected in sequence. The control circuit can pass through the first connecting groove (12), the second connecting groove (312) and the third connecting groove (321) and be electrically connected to the heating block (2). The second connecting groove (312) is set in the positioning protrusion (311), or the positioning protrusion (311) is set on the outer periphery of the second connecting groove (312).

4. A hot melt machine according to claim 3, characterized in that: The positioning groove (324) is the first connecting groove (12). The heat insulation plate (31) extends toward the handle (1) to form a plurality of positioning protrusions (311). The positioning protrusions (311) are disposed on the outer periphery of the second connecting groove (312) and can respectively abut against the side wall of the first connecting groove (12).

5. A hot melt machine according to claim 3, characterized in that: The handle (1) and the heat insulation plate (31) are respectively provided with a first mounting hole (19) and a second mounting hole (315). Fasteners pass through the first mounting hole (19) and the second mounting hole (315) and fix the heat insulation plate (31) and the handle (1) respectively. The side wall of the second mounting hole (315) extends into the second connecting groove (312) to form a side protrusion (18).

6. A hot melt machine according to claim 5, characterized in that: The end of the second mounting hole (315) extends toward the handle (1) to form a boss. The end of the boss is provided with a support end face (314). The fastener controls the heat insulation plate (31) to be fixed relative to the handle (1) and makes the support end face (314) abut against the handle (1).

7. A hot melt machine according to claim 4, 5, or 6, characterized in that: The grip (1) is provided with a reinforcing rod (121), which is connected to both sides of the first connecting groove (12).

8. A hot melt machine according to claim 1, 2, 4, 5, or 6, characterized in that: The control circuit is provided with a knob (52) for controlling the heating power of the heating block (2). The knob (52) is located on the side of the handle (1). The handle (1) extends outward from the knob (52) to form a ring or arc-shaped protective ridge (13). The protective ridge (13) can protect the knob (52). A control groove (14) for controlling the rotation of the knob (52) is provided on the side of the protective ridge (13) or on the side wall of the protective ridge (13).

9. A hot melt machine according to claim 8, characterized in that: The control circuit is equipped with a master control switch (53) for controlling the heating block (2), and a storage groove (15) is provided on the side wall of the handle (1), with the master control switch (53) passing through the storage groove (15).

10. A hot melter according to claim 1, 2, 4, 5, 6, or 9, characterized in that: It also includes a support device (4), which is detachably connected to the handle (1) and can support the handle (1). The support device (4) includes a pole (41), on which two foldable support legs (42) are rotatably mounted. The two support legs (42) are provided with meshing gear parts (422), which can make the two support legs (42) rotate synchronously.

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