Die changeable hot melt applicator

Abstract

This utility model discloses a die-changing hot melt machine, relating to the field of hot melt machines. It includes a main frame with a heating plate connected to its top. Heating element one and heating element two are respectively connected to both sides of the heating plate. A protective cover is hinged to the main frame. A guide block is rotatably connected to the end of the rotating block two away from the rotating block one. The guide block slides inside a through groove. A fixing frame is fixed between the guide blocks. A pull rod is fixed to the center side of the fixing frame. A spring connects the fixing frame to the through groove. In this die-changing hot melt machine, after the first and second inserts slide out of the heating elements one and two, the heating elements one and two lose their compressive force. At this time, the heating elements one and two can be disassembled and replaced. When the threaded ring slides, it can drive the first insert towards the second insert, and the first insert can drive the sliding groove to slide through the sliding block. The sliding of the first insert towards the second insert changes their lengths.

Description

Technical Field

[0001] This utility model relates to the field of hot melt equipment technology, specifically a die-changing hot melt equipment. Background Technology

[0002] A hot melt machine is a tool that uses heat to partially melt materials and then uses pressure to join or shape them. It is widely used in plastic processing and can improve the sealing of pipe connections. Hot melt machines have various die head specifications and are usually installed using a threaded design.

[0003] Currently, hot melt machines still have some shortcomings, such as the time and effort required to replace the die head.

[0004] To overcome the problem of time-consuming and laborious die replacement, the existing Chinese patent (publication number: CN211542414U) discloses a hot melt machine with quick die replacement. The die replacement is convenient and quick, suitable for the needs of various pipe fittings with different diameters, improving work efficiency. Moreover, the integrated die design will not cause mixed use and avoid human operation errors.

[0005] However, the hot melt machine currently in use still has some shortcomings. The above document describes how the die head can be replaced by pressing. Although this method is relatively fast, there is a tendency for gaps to appear during pressing, causing the die head to wobble after replacement. This lack of stability may affect the quality of the processed parts. Therefore, the existing structure needs to be improved. Utility Model Content

[0006] The purpose of this utility model is to provide a die-changing hot melt machine to solve the problems mentioned in the background art, such as the inconvenience of replacing the die head and the potential instability after replacement.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a die-changing hot melt machine, comprising a main frame, a heating plate connected to the top of the main frame, a heating element one and a heating element two respectively connected to both sides of the heating plate, and a protective cover hinged to the main frame.

[0008] Both heating element one and heating element two are thermistors. A first insert is slidably connected inside the second heating element. The end of the first insert is connected to the second insert. The second insert is movable inside the first heating element. Rotating blocks are rotatably connected to the eccentric blocks on both sides of the second insert. A pull rod is slidably connected through the first insert and the second insert. An extrusion mechanism to improve the efficiency of die replacement is provided inside the first insert.

[0009] Furthermore, the extrusion mechanism includes a through groove that extends through the interior of the insert block one. There are four through grooves. A rotating block one is rotatably connected inside the through groove, and a rotating block two is rotatably connected to the end of the rotating block one.

[0010] Furthermore, a guide block is rotatably connected to the end of the second rotating block away from the first rotating block. The guide block slides inside the through groove. A fixing frame is fixed between the guide blocks. A pull rod is fixed to the center side of the fixing frame. A spring is connected between the fixing frame and the through groove, and the fixing frame and the through groove form a sliding connection.

[0011] Furthermore, the two sides of the insert block are provided with an adjustment mechanism to improve the installation stability of the mold head. The adjustment mechanism includes four sliding blocks fixed at the two ends of the insert block, and the sliding blocks slide through the inside of the slide groove, which is opened at one end of the insert block.

[0012] Furthermore, a threaded block is fixed at the center of the two ends of the insert block, and a threaded ring is threadedly connected to the side of the threaded block. A T-shaped ring is fixed to the side of the threaded ring near the insert block, and the T-shaped ring rotates through the insert block.

[0013] Furthermore, a ratchet assembly is fitted onto the surface of the threaded ring, and the ratchet assembly consists of two positive and negative ratchets. A fixing block is fixed to the side of the insert block near the T-shaped ring. A push block is slidably connected to the side of the fixing block. A limit block is fixed to the side of the push block near the fixing block. The limit block slides through the limit groove.

[0014] Furthermore, the limiting groove is formed on one side of the insert block, and the two sides of the push block are rotatably connected to rotating rods by torsion springs, with the rotating rods located on the front and rear sides of the push block respectively, and the two rotating rods being close to the sides of the two ratchet wheels respectively.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this die-changing hot melt machine, after the insert block 1 and insert block 2 slide out of the heating element 1 and heating element 2, the heating element 1 and heating element 2 will lose the extrusion force. At this time, the heating element 1 and heating element 2 can be disassembled and replaced. When the threaded ring slides, it can drive the insert block 1 to move closer to the insert block 2. The insert block 1 can also drive the slide groove to slide through the sliding block. When the insert block 1 slides towards the insert block 2, their lengths can be changed.

[0017] 2. A rotating block is provided. The rotating block can change its position by rotating the eccentric block. By changing its position, the rotating block can squeeze the heating element one, so that the heating element one and the heating element two can be quickly disassembled and replaced.

[0018] 3. A pull rod is provided, which can drive the fixed frame to move. The spring on the side of the fixed frame can ensure that the position of the fixed frame remains unchanged when there is no force. This allows the rotating block two to perform planar compression on the inner wall of the heating element two, improving the tightness of the mold head installation.

[0019] 4. A fixing block is provided, which allows the push block to slide and rotate, thereby driving the rotating rod to move closer to or further away from the side of the ratchet assembly. This facilitates the adjustment of the distance between the first and second insert blocks and improves the stability of the mold head replacement. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall frontal three-dimensional structure of this utility model;

[0021] Figure 2 This is a three-dimensional structural diagram of the heating plate of this utility model.

[0022] Figure 3 This is an enlarged three-dimensional structural diagram of the rotating block of this utility model;

[0023] Figure 4 This is an enlarged three-dimensional structural diagram of the fixing frame of this utility model;

[0024] Figure 5 This is an enlarged three-dimensional structural diagram of the pull rod of this utility model;

[0025] Figure 6 This is an enlarged three-dimensional structural diagram of the sliding block of this utility model;

[0026] Figure 7 This is an enlarged three-dimensional structural diagram of the threaded block of this utility model;

[0027] Figure 8 This is an enlarged three-dimensional structural diagram of the ratchet assembly of this utility model.

[0028] In the diagram: 1. Main frame; 2. Heating plate; 3. Heating element one; 4. Heating element two; 5. Protective cover; 101. Insert block one; 102. Insert block two; 103. Rotating block; 104. Pull rod; 105. Through groove; 106. Rotating block one; 107. Rotating block two; 108. Guide block; 109. Fixing frame; 201. Sliding block; 202. Threaded block; 203. Slide groove; 204. Threaded ring; 205. Ratchet assembly; 206. T-ring; 207. Fixing block; 208. Push block; 209. Limiting block; 210. Limiting groove; 211. Rotating rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Traditional hot melters do not have a protective cover 5, so they cannot be carried away immediately after use and need to be cooled to room temperature. With the protective cover 5, after use, the cover can be closed and other operations can be completed without waiting. In addition, the traditional heating element is a resistance wire, while this device uses a thermistor. The thermistor will reduce the current after reaching a certain temperature, thus increasing the battery life with limited power and achieving energy saving.

[0031] Example 1, such as Figures 1-5 The technical solution shown in this utility model provides the following technical solution: To solve the problem of inconvenient die replacement in hot melt machines, an extrusion mechanism is disclosed: including a main frame 1, a heating plate 2 connected to the top of the main frame 1, heating element 3 and heating element 4 respectively connected to both sides of the heating plate 2, and a protective cover 5 hinged to the main frame 1; heating element 3 and heating element 4 are both thermistors, a first insert 101 is slidably connected inside the second heating element 4, a second insert 102 is connected to the end of the first insert 101, the second insert 102 is movable inside the first heating element 3, eccentric blocks on both sides of the second insert 102 are rotatably connected to rotating blocks 103, and a pull rod 104 is slidably connected through the inside of the first insert 101 and the second insert 102. The insert block 101 is equipped with an extrusion mechanism to improve the efficiency of die replacement. The extrusion mechanism includes a through slot 105 that runs through the insert block 101. There are four through slots 105. A rotating block 106 is rotatably connected inside the through slot 105. A rotating block 2 107 is rotatably connected to the end of the rotating block 106. A guide block 108 is rotatably connected to the end of the rotating block 2 107 away from the rotating block 106. The guide block 108 slides inside the through slot 105. A fixing frame 109 is fixed between the guide blocks 108. A pull rod 104 is fixed to the center side of the fixing frame 109. A spring is connected between the fixing frame 109 and the through slot 105, and the fixing frame 109 and the through slot 105 are in a sliding connection.

[0032] When the heat fusion machine is in use, the heating plate 2 heats heating element 3 and heating element 4. The operator inserts the processed pipe fittings into the sides of heating element 3 and heating element 4 for heat fusion. After heat fusion, the pipe fittings can be connected. When heating element 3 and heating element 4 are replaced with different specifications, pulling the pull rod 104 can move the fixing frame 109. When the fixing frame 109 moves, it can slide through the through groove 105. When the fixing frame 109 slides, it can compress the spring through the through groove 105. When the fixing frame 109 compresses, it can move the guide block 108. When the guide block 108 moves, it can rotate the rotating block 107. The rotating block 107 can be connected to the rotating block 106 through the guide block 108. When rotating, rotating block 106 can rotate through the through groove 105. When rotating block 106 and rotating block 2 107 are fully rotated into the through groove 105, rotating block 103 can be rotated. Rotating block 103 can rotate through the eccentric block. When rotating block 103 rotates to a 90-degree angle, it no longer squeezes the inner wall of heating element 3. At this time, pulling rotating block 103 outward can drive insert block 101 and insert block 2 102 to move. When insert block 101 and insert block 2 102 slide out of the interior of heating element 3 and heating element 4, heating element 3 and heating element 2 4 will lose the squeezing force. At this time, heating element 3 and heating element 2 4 can be disassembled and replaced, which improves the efficiency of hot melt die head replacement.

[0033] Example 2, as follows Figure 3 , Figure 6 , Figure 7 and Figure 8The present invention provides the following technical solution to address the problem of loose die head installation in the hot melt machine, based on Embodiment 1, an adjustment mechanism is disclosed: An adjustment mechanism to improve the stability of die head installation is provided on the side of the insert block 2 102. The adjustment mechanism includes four sliding blocks 201 fixed to the end of the insert block 2 102, and each sliding block 201 slides through a groove 203 located at the end of the insert block 1 101. A threaded block 202 is fixed at the center of the end of the insert block 2 102. A threaded ring 204 is threadedly connected to the side of the threaded block 202, and a T-shaped ring 206 is fixed to the side of the threaded ring 204 near the insert block 1 101. T-shaped ring 206 rotates through the inside of insert block 101. A ratchet assembly 205 is fitted onto the surface of threaded ring 204, and the ratchet assembly 205 consists of two positive and negative ratchet wheels. A fixing block 207 is fixed to the side of insert block 101 near T-shaped ring 206. A push block 208 is slidably connected to the side of fixing block 207. A limit block 209 is fixed to the side of push block 208 near fixing block 207. The limit block 209 slides through the inside of limit groove 210, which is opened on the side of insert block 101. Rotating rods 211 are rotatably connected to both sides of push block 208 by torsion springs. The rotating rods 211 are located on the front and rear sides of push block 208, and the two rotating rods 211 are close to the sides of the two ratchet wheels.

[0034] When the die head of the hot melt machine is not securely fixed, the push block 208 can be rotated before the heating element 3 and the heating element 4 are installed. When the push block 208 rotates, it can rotate through the fixing block 207, and the push block 208 can drive the limiting block 209 to swing. When the limiting block 209 swings, it can slide through the limiting groove 210. When the push block 208 rotates, it can drive the two rotating rods 211 to rotate. The two rotating rods 211 can be held on the side of the ratchet assembly 205 by the torsion spring of the push block 208. The plane of one of the rotating rods 211 can press against the plane of the ratchet assembly 205. When the ratchet assembly 205 is pressed, it can drive the threaded ring 204 and the T-ring 206 to rotate. When the T-ring 206 rotates, it can rotate through the insert block 101. When the threaded ring 204 rotates, it can slide through the threaded block 202. When the threaded ring 204 slides, it can drive the insert block 101 to move closer to the insert block 202, and the insert block 101 can drive the… The movable groove 203 slides through the sliding block 201. When the first insert block 101 slides towards the second insert block 102, their lengths can be changed. When the lengths are changed, the stability and tightness of the rotating block 103 when pressing the heating element 3 and the second heating element 4 can be improved. If the first insert block 101 and the second insert block 102 are too close to achieve the pressing and fixing of the heating element 3 and the second heating element 4, the push block 208 can be pushed towards the first insert block 101. When the push block 208 is pushed, the limiting block 209 can slide through the limiting groove 210, and the push block 208 can slide through the fixing block 207. When the push block 208 slides, it can drive another rotating rod 211 to move to the side of another set of ratchet assembly 205, while the previous rotating rod 211 will move out of the side of the previous ratchet assembly 205. By rotating the push block 208 in the same way, the second insert block 102 and the first insert block 101 can be driven away from each other by the thread, which makes it convenient to adjust the tightness of the heating element 3 and the second heating element 4.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A die-changing hot melt machine, comprising a main frame (1), wherein a heating plate (2) is connected to the top of the main frame (1), and heating elements one (3) and two (4) are respectively connected to both sides of the heating plate (2), and a protective cover (5) is hinged to the main frame (1), characterized in that: Both heating element one (3) and heating element two (4) are thermistors. A first insert block (101) is slidably connected inside the second heating element (4). A second insert block (102) is connected to the end of the first insert block (101). The second insert block (102) is movable inside the first heating element (3). Rotating blocks (103) are rotatably connected to the eccentric blocks on both sides of the second insert block (102). A pull rod (104) is slidably connected through the first insert block (101) and the second insert block (102). An extrusion mechanism to improve the die replacement efficiency is provided inside the first insert block (101).

2. The die-changing hot melt machine according to claim 1, characterized in that: The extrusion mechanism includes a through slot (105) that runs through the inside of the insert block (101). There are four through slots (105). A rotating block (106) is rotatably connected inside the through slot (105). A rotating block (107) is rotatably connected to the end of the rotating block (106).

3. The die-changing hot melt machine according to claim 2, characterized in that: The end of the second rotating block (107) away from the first rotating block (106) is rotatably connected to a guide block (108). The guide block (108) slides inside the through groove (105). A fixing frame (109) is fixed between the guide blocks (108). A pull rod (104) is fixed on the center side of the fixing frame (109). A spring is connected between the fixing frame (109) and the through groove (105), and the fixing frame (109) and the through groove (105) form a sliding connection.

4. The die-changing hot melt machine according to claim 1, characterized in that: The second insert (102) is provided with an adjustment mechanism on its side to improve the stability of the mold head installation. The adjustment mechanism includes a sliding block (201) fixed at the end of the second insert (102). There are four sliding blocks (201), and the sliding blocks (201) slide through the inside of the slide groove (203). The slide groove (203) is opened at the end of the first insert (101).

5. A die-changing hot melt machine according to claim 1, characterized in that: A threaded block (202) is fixed at the center of the end of the second insert (102). A threaded ring (204) is threadedly connected to the side of the threaded block (202). A T-shaped ring (206) is fixed to the side of the threaded ring (204) near the first insert (101). The T-shaped ring (206) rotates through the first insert (101).

6. A die-changing hot melt machine according to claim 5, characterized in that: The threaded ring (204) is fitted with a ratchet assembly (205), which consists of two ratchet wheels. The insert block (101) is fixed with a fixing block (207) near the side of the T-ring (206). The fixing block (207) is slidably connected with a push block (208). The push block (208) is fixed with a limit block (209) near the side of the fixing block (207). The limit block (209) slides through the limit groove (210).

7. A die-changing hot melt machine according to claim 6, characterized in that: The limiting groove (210) is opened on the side of the insert block (101). The two sides of the push block (208) are rotatably connected to the rotating rods (211) by torsion springs. The rotating rods (211) are located on the front and rear sides of the push block (208) respectively, and the two rotating rods (211) are close to the sides of the two ratchet wheels respectively.

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