Hot melt mechanism, hot air welding machine and working method thereof

Abstract

The present invention relates to a hot melt mechanism, comprising at least two heat block assemblies, and at least two upper and lower self-adjusting mechanisms. A hot air welding machine comprises a machine body, an upper pulley and a lower pulley are provided on the machine body, and an annular step for avoiding the hemming tape is formed on the lower pulley; and a hot melt mechanism. A working method of a hot air welding machine; a drawing cloth with an hemming tape is arranged between the upper pulley and the lower pulley, the lower end of the hemming tape is located in the annular step of the lower pulley, and the lower end of the drawing cloth is attached to the lower pulley; the upper pulley covers the reinforcing strip at the junction of the hemming tape and the drawing cloth, and the outer blowing heat block melts the hemming tape and the reinforcing strip; the inner blowing heat block is pressed down by the upper pulley to fit the upper surface of the drawing cloth, and the inner blowing heat block moves downward to melt the drawing cloth and the reinforcing strip. The reinforcing strip can be welded to the uneven hemming tape and the drawing cloth, so that the reinforcing strip can be welded to the hemming tape and the drawing cloth more firmly, thereby improving the quality of the final product.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic glue hot-melt, and in particular to a hot-melt mechanism, a hot-air welding machine and a working method thereof. Background Art

[0002] like Figure 1 The seat cushion shown in the figure includes a brushed cloth 10, an edge tape 11 and a reinforcement tape. After the brushed cloth 10 is connected to the edge tape 11 on all sides by a welding machine, a reinforcement strip 12 needs to be welded to the upper surface of the brushed cloth 10 and the edge tape 11. The reinforcement strip 12 is used to increase the strength between the edge tape 11 and the brushed cloth 10. In addition, the reinforcement strip 12 can also be used as a decorative strip for decoration. Since there is a step between the edge tape 11 and the brushed cloth 10 at this time, if the traditional blowing The air heating block (the traditional air heating block, see the prior patent application, patent application number: CN201911383224.4, patent name: air heating wedge and its heating method and use method; because the working surface of the previous air heating wedge is flat) is used to weld the reinforcement strip 12. The reinforcement strip 12 can only be firmly welded to the higher edge band 11. Due to the height difference between the reinforcement strip 12 and the drawing cloth 10, the reinforcement strip 12 and the drawing cloth 10 cannot be firmly welded.

[0003] Therefore, in summary, when the conventional hot wedge is used to weld the reinforcement strip 12 at an uneven position, the reinforcement strip 12 cannot be firmly connected to both high and low surfaces at the same time. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a hot melt mechanism, a hot air welding machine and its working method to solve the problem that when the previous hot air wedge is used to weld the reinforcement strip in an uneven position, the reinforcement strip cannot be firmly connected to the high and low surfaces at the same time.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] First aspect:

[0007] A hot melt mechanism, comprising

[0008] at least two thermal block assemblies, and

[0009] At least two upper and lower self-adjusting mechanisms are fixedly connected to the heat block assembly, and the upper and lower self-adjusting mechanisms are suitable for automatically driving the heat block assembly to adjust its upper and lower positions.

[0010] Furthermore, the upper and lower self-adjusting mechanism includes

[0011] A mounting block, adapted to be fixedly connected to the machine body;

[0012] a fixture adapted to hold the thermal block assembly; and

[0013] The spring assembly is arranged between the mounting block and the clamp, and is suitable for making the clamp move elastically up and down along the mounting seat.

[0014] Furthermore, the spring assembly includes an upper spring seat, a lower spring seat, a middle spring seat, an upper compression spring and a lower compression spring;

[0015] The upper spring seat is fixedly arranged at the upper end of the clamp, the lower spring seat is fixedly arranged at the lower end of the clamp, the upper compression spring is arranged between the upper spring seat and the middle spring seat, and the lower compression spring is arranged between the lower spring seat and the middle spring seat.

[0016] Furthermore, the upper spring seat and the lower spring seat are both threaded with an adjusting screw, one end of the compression spring abuts against the middle spring seat, and the other end of the compression spring abuts against the adjusting screw;

[0017] The adjusting screw includes a threaded section and a cylindrical section. The diameter of the cylindrical section is smaller than that of the threaded section. A washer is provided on the cylindrical section. The threaded section of the adjusting screw is connected to the spring seat. The compression spring is inserted into the cylindrical section and abuts against the washer.

[0018] Furthermore, a guide rail assembly is provided between the clamp and the mounting block;

[0019] The guide rail assembly includes a guide rail and a slider. The guide rail is vertically fixed on the mounting block, and the slider is vertically fixed on the fixture. The slider and the guide rail form a sliding fit, which is suitable for moving the fixture up and down along the mounting seat.

[0020] Furthermore, the fixture includes a base, a cover plate and a thermal insulation seat, the front side of the base is fixedly connected to the cover plate, and the rear side of the base is fixedly connected to the thermal insulation seat; the thermal insulation seat is connected to the mounting block, and the heat block assembly is clamped between the cover plate and the base.

[0021] Furthermore, the heat block assembly includes a hot air gun, a heat pipe and a blowing heat block, one end of the heat pipe is fixedly connected to the blowing heat block, and the other end of the heat pipe is fixedly connected to the air outlet of the hot air gun.

[0022] A second aspect: A hot air welding machine comprising

[0023] A machine body, wherein an upper pulley and a lower pulley are provided on the machine body, and an annular step for avoiding the hemming belt is formed on the lower pulley; and

[0024] The hot melt mechanism mentioned above.

[0025] The third aspect:

[0026] A working method of a hot air welding machine,

[0027] The hot melt mechanism of the hot air welding machine includes two heat block assemblies. The air blowing heat block of the outer heat block assembly is located between the annular steps of the upper and lower leather wheels; the air blowing heat block of the inner heat block assembly is located between the upper and lower leather wheels.

[0028] The drawing cloth with the hemming tape is placed between the upper pulley and the lower pulley, with the lower end of the hemming tape located in the annular step of the lower pulley, and the lower end of the drawing cloth is attached to the lower pulley;

[0029] The upper roller covers the reinforcing strip at the junction of the edge tape and the drawing cloth, and the outer blowing heat block melts the edge tape and the reinforcing strip to weld the reinforcing strip to the edge tape;

[0030] The inner blowing heat block is pressed down by the upper wheel to fit the upper surface of the drawing cloth, and the inner blowing heat block moves downward to melt the drawing cloth and the reinforcement strip so that the reinforcement strip is welded to the drawing cloth.

[0031] The beneficial effects of the present invention are:

[0032] Provided are a hot melt mechanism, a hot air welding machine, and a working method thereof. Reinforcement strips can be welded to uneven edging tape and wire drawing cloth by means of two heat block assemblies that can automatically adjust their upper and lower positions, so that the reinforcement strips can be welded to the edging tape and wire drawing cloth more firmly, thereby improving the quality of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] Figure 1 and Figure 2 It is a schematic diagram of the cushion;

[0035] Figure 3 It is a schematic diagram of the hot melt mechanism;

[0036] Figure 4 is a schematic diagram of the mounting block, spring assembly, and clamp;

[0037] Figure 5 It is a schematic diagram of the mounting block, spring assembly, and thermal insulation seat;

[0038] Figure 6 is a schematic diagram of the spring assembly;

[0039] Figure 7 It is a schematic diagram of a hot air welding machine;

[0040] Figure 8 This is a schematic diagram of the hot air welding machine in operation;

[0041] Among them, 10, brushed cloth, 11, edge tape, 12, reinforcement strip;

[0042] 2. Heat block assembly, 21. Hot air gun, 22. Heat pipe, 23. Blowing heat block;

[0043] 3. Upper and lower self-adjusting mechanism, 31. Mounting block, 32. Guide rail, 33. Slider;

[0044] 4. Spring assembly, 41. Upper spring seat, 42. Lower spring seat, 43. Upper compression spring, 44. Lower compression spring, 45. Adjusting screw, 46. Washer;

[0045] 5. Clamp, 51. Cover, 52. Base, 53. Heat insulation seat;

[0046] 61. Upper pulley, 62. Lower pulley, 621. Annular step. DETAILED DESCRIPTION

[0047] The present invention will now be further described with reference to specific embodiments. These drawings are simplified schematic diagrams and only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0048] Example 1

[0049] like Figures 1 to 6 As shown, a hot melt mechanism includes at least two heat block assemblies 2 and at least two upper and lower self-adjusting mechanisms 3. The upper and lower self-adjusting mechanisms 3 are fixedly connected to the heat block assemblies 2, and the upper and lower self-adjusting mechanisms 3 are suitable for automatically driving the heat block assemblies 2 to adjust their upper and lower positions.

[0050] In this embodiment, there are two heat block assemblies 2, and accordingly, there are also two upper and lower self-adjusting mechanisms 3. Each upper and lower self-adjusting mechanism 3 controls the corresponding heat block assembly 2 to adjust its upper and lower positions.

[0051] Specifically, in this embodiment, the upper and lower self-adjusting mechanism 3 includes a mounting block 31, which is suitable for being fixedly connected to the machine body; a clamp 5, which is suitable for clamping the heat block assembly 2; and a spring assembly 4, which is arranged between the mounting block 31 and the clamp 5, and is suitable for making the clamp 5 elastically move up and down along the mounting seat.

[0052] Specifically, such as Figure 6 As shown, the spring assembly 4 includes an upper spring seat 41, a lower spring seat 42, a middle spring seat, an upper compression spring 43 and a lower compression spring 44; the upper spring seat 41 is fixedly arranged at the upper end of the clamp 5, the lower spring seat 42 is fixedly arranged at the lower end of the clamp 5, the upper compression spring 43 is arranged between the upper spring seat 41 and the middle spring seat, and the lower compression spring 44 is arranged between the lower spring seat 42 and the middle spring seat.

[0053] Specifically, the upper spring seat 41 and the lower spring seat 42 are both screwed with an adjusting screw 45 , one end of the compression spring abuts against the middle spring seat, and the other end of the compression spring abuts against the adjusting screw 45 ;

[0054] The adjusting screw 45 includes a threaded section and a cylindrical section. The diameter of the cylindrical section is smaller than that of the threaded section. A washer 46 is provided on the cylindrical section. The threaded section of the adjusting screw 45 is connected to the spring seat. The compression spring is inserted into the cylindrical section and abuts against the washer 46.

[0055] In order to make the clamp 5 more stable in the horizontal direction, spring components 4 are respectively provided at both ends of the clamp 5;

[0056] The clamp 5 maintains elastic movement in the vertical direction by relying on the elastic force of the upper compression spring 43 and the lower compression spring 44 .

[0057] Specifically, in this embodiment, a guide rail assembly is disposed between the fixture 5 and the mounting block 31. The guide rail assembly includes a guide rail 32 and a slider 33. The guide rail 32 is vertically fixed to the mounting block 31, and the slider 33 is vertically fixed to the fixture 5. The slider 33 forms a sliding engagement with the guide rail, allowing the fixture 5 to move up and down along the mounting base. The guide rail assembly ensures that the fixture 5 can only move up and down in the vertical direction.

[0058] Specifically, in this embodiment, the clamp 5 includes a base 52, a cover 51 and a thermal insulation seat 53. The front side of the base 52 is fixedly connected to the cover 51, and the rear side of the base 52 is fixedly connected to the thermal insulation seat 53; the thermal insulation seat 53 is connected to the mounting block 31, and the heat block assembly 2 is clamped between the cover 51 and the base 52.

[0059] Specifically, in this embodiment, the heat block assembly 2 includes a heat gun 21, a heat pipe 22, and a blowing heat block 23. One end of the heat pipe 22 is fixedly connected to the blowing heat block 23, and the other end of the heat pipe 22 is fixedly connected to the air outlet of the heat gun 21. In this embodiment, the heat block assembly 2 is a prior art. The specific structure can be found in our company's prior patent application, patent application number: CN201911383224.4, patent name: Blowing Heat Wedge and Its Heating Method and Use Method.

[0060] In this patent, the main thing is to change the previous single-use heat block assembly 2 into the current combination of two, and cooperate with the upper and lower self-adjusting mechanism 3 to control its up and down movement; in the upper and lower self-adjusting mechanism 3, relying on the elastic force of the upper and lower compression springs, the blowing heat block 23 can make elastic movement to adjust the upper and lower positions when it is subjected to vertical thrust, so that the blowing heat block 23 can be stably attached to the drawing cloth 10 or the edge tape 11.

[0061] Example 2

[0062] like Figure 7 Figure 8 As shown, a hot air welding machine includes

[0063] A machine body (not shown in the figure), on which an upper pulley 61 and a lower pulley 62 are provided, and on which an annular step 621 is formed for avoiding the edging tape 11; and the hot melt mechanism in Example 1, wherein the mounting block 31 of the hot melt mechanism is fixedly connected to the machine body.

[0064] The hot air welding machine of this embodiment relies on two blowing heat blocks 23 that can move elastically up and down. When the welding machine lowers the reinforcement strip 12 and welds it to the edge band 11 and the brushed cloth 10, the inner blowing heat block 23 can move downward under the squeezing of the upper roller 61, so that the blowing heat block 23 is pressed on the brushed cloth 10, and the other blowing heat block 23 is pressed tightly on the edge band 11. The two blowing heat blocks 23 are matched in height so that the reinforcement band can be stably welded to the brushed cloth 10 and the edge band 11.

[0065] Example 3

[0066] A working method of a hot air welding machine,

[0067] The hot melt mechanism of the hot air welding machine includes two heat block assemblies 2. The air blowing heat block 23 of the outer heat block assembly 2 is located between the annular step 621 of the upper and lower belt wheels 61 and 62; the air blowing heat block 23 of the inner heat block assembly 2 is located between the upper and lower belt wheels 61 and 62.

[0068] The drawing cloth 10 with the hemming tape 11 is placed between the upper pulley 61 and the lower pulley 62, with the lower end of the hemming tape 11 located within the annular step 621 of the lower pulley 62, and the lower end of the drawing cloth 10 is attached to the lower pulley 62;

[0069] The upper roller 61 covers the reinforcing strip 12 at the junction of the hemming tape 11 and the drawing cloth 10, and the outer blowing heat block 23 heat-melts the hemming tape 11 and the reinforcing strip 12, so that the reinforcing strip 12 and the hemming tape 11 are welded together;

[0070] The inner blowing heat block 23 is pressed down by the upper roller 61 to fit the upper surface of the drawing cloth 10 , and the inner blowing heat block 23 moves downward to melt the drawing cloth 10 and the reinforcing strip 12 so that the reinforcing strip 12 is welded to the drawing cloth 10 .

[0071] The working method of the hot air welding machine of this embodiment relies on the vertical adjustment of the two adjacent blowing heat blocks 23, and can weld the reinforcing strip 12 to the edge band 11 and the drawing cloth 10 at different heights, thereby improving the quality of the product.

[0072] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A hot melt mechanism, characterized in that it includes at least two thermal block assemblies, and At least two upper and lower self-adjusting mechanisms, the upper and lower self-adjusting mechanisms being fixedly connected to the heat block assembly and adapted to automatically drive the heat block assembly to adjust its position up and down; The upper and lower self-adjusting mechanism includes A mounting block, adapted to be fixedly connected to the machine body; a fixture adapted to hold the thermal block assembly; and a spring assembly, disposed between the mounting block and the clamp, adapted to elastically move the clamp up and down along the mounting seat; The spring assembly includes an upper spring seat, a lower spring seat, a middle spring seat, an upper compression spring and a lower compression spring; The upper spring seat is fixedly arranged at the upper end of the clamp, the lower spring seat is fixedly arranged at the lower end of the clamp, the upper compression spring is arranged between the upper spring seat and the middle spring seat, and the lower compression spring is arranged between the lower spring seat and the middle spring seat; The upper spring seat and the lower spring seat are both threaded with an adjusting screw, one end of the compression spring abuts against the middle spring seat, and the other end of the compression spring abuts against the adjusting screw; The adjusting screw includes a threaded section and a cylindrical section, the diameter of the cylindrical section is smaller than the diameter of the threaded section, a washer is provided on the cylindrical section, the threaded section of the adjusting screw is connected to the spring seat, and the compression spring is inserted into the cylindrical section and abuts against the washer; A guide rail assembly is provided between the clamp and the mounting block; The guide rail assembly includes a guide rail and a slider. The guide rail is vertically fixed on the mounting block, and the slider is vertically fixed on the fixture. The slider and the guide rail form a sliding fit, which is suitable for moving the fixture up and down along the mounting seat.

2. The hot melt mechanism according to claim 1, wherein: The fixture includes a base, a cover plate and a heat insulation seat. The front side of the base is fixedly connected to the cover plate, and the rear side of the base is fixedly connected to the heat insulation seat; the heat insulation seat is connected to the mounting block, and the heat block assembly is clamped between the cover plate and the base.

3. The hot melt mechanism according to claim 1, wherein: The heat block assembly includes a hot air gun, a heat pipe and a blowing heat block, one end of the heat pipe is fixedly connected to the blowing heat block, and the other end of the heat pipe is fixedly connected to the air outlet of the hot air gun.

4. The hot melt mechanism according to claim 1, wherein: The number of the heat block assemblies is two, and the number of the upper and lower self-adjusting mechanisms is two.

5. A hot air welding machine, characterized in that: include A machine body, wherein an upper pulley and a lower pulley are provided on the machine body, and an annular step for avoiding the hemming belt is formed on the lower pulley; and The hot melt mechanism according to any one of claims 1 to 4.

6. A method for operating the hot air welding machine according to claim 5, characterized in that: The hot melt mechanism of the hot air welding machine includes two heat block assemblies. The air blowing heat block of the outer heat block assembly is located between the annular steps of the upper and lower leather wheels; the air blowing heat block of the inner heat block assembly is located between the upper and lower leather wheels. The drawing cloth with the hemming tape is placed between the upper pulley and the lower pulley, with the lower end of the hemming tape located in the annular step of the lower pulley and the lower end of the drawing cloth attached to the lower pulley; The upper roller covers the reinforcing strip at the junction of the edge tape and the drawing cloth, and the outer blowing heat block melts the edge tape and the reinforcing strip to weld the reinforcing strip to the edge tape; The inner blowing heat block is pressed down by the upper wheel to fit the upper surface of the drawing cloth, and the inner blowing heat block moves downward to melt the drawing cloth and the reinforcement strip so that the reinforcement strip is welded to the drawing cloth.

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