Blowing hot wedge and its heating method and usage method

Abstract

The present invention belongs to the technical field of hot melt welding, and particularly relates to a blowing hot wedge and its heating method and usage method. The blowing hot wedge includes: a hot wedge body, which includes a welding part and a heat receiving part. The heat receiving part is hollow to form a hot air cavity, and the hot air cavity is provided with an air inlet end and an air outlet end; the welding part receives the heat conducted by the hot air cavity to hot melt weld two materials to be welded passing through the inlet of the pressing part of the hot air welding machine. The heating method uses the blowing hot wedge and includes the following steps: the air heated by the outside penetrates into the hot air cavity from the air inlet end and is discharged from the air outlet end to form a heat cycle; during the cyclic operation of the hot air, the heat of the hot air is conducted to the welding part of the blowing hot wedge to hot melt weld the two materials to be welded by the welding part. In the present invention, the welding heat is obtained through heat conduction, the hot air does not directly blow the material, the heat output is concentrated, avoiding material wrinkling and deformation and bright edges around the welding, and the welding quality is high. It is small in size, high in heat transfer, and high in welding efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of hot melt welding, and particularly relates to a blowing hot wedge and its heating method and usage method. Background Art

[0002] With the continuous improvement of living standards, products made of soft materials such as PVC, TPU, and PE are becoming more and more diverse and refined. For welding soft materials, hot air units are usually used to blow hot air at the welding area, see Patent CN109070485A. By spraying hot air simultaneously on the upper and lower parts around the edge of the wire drawing cloth and then using a pressure roller for pressing, the two edge components formed at the edge of the wire drawing cloth are hot melt welded. In this welding method, the hot air is easily diffused, the spraying range of the hot air is wide, resulting in the material being easily wrinkled and deformed, and bright edges are easily generated around the welding area, affecting the welding quality. Moreover, there is a large amount of smoke and noise during the welding process, which does not meet the environmental protection requirements. Traditional hot wedges use heating rods for heating, have a large volume and cannot make full use of space; and using aluminum, copper, or silver as the hot wedge body has a low temperature resistance, only up to 450 degrees Celsius, and the welding efficiency is low. Summary of the Invention

[0003] The purpose of the present invention is to provide a blowing hot wedge and its heating method and usage method to solve the technical problems that the heat of the existing hot air welding is easily diffused and bright edges are easily generated around the welding area; the traditional hot wedge welding has a large volume, low temperature resistance, and low welding efficiency.

[0004] To solve the above technical problems, the present invention provides a blowing hot wedge, including a hot wedge body, the hot wedge body includes a welding part and a heat receiving part, the heat receiving part is hollow to form a hot air cavity, and the hot air cavity is provided with an air inlet end and an air outlet end;

[0005] The welding part is adapted to receive the heat conducted by the hot air cavity, so that two materials to be welded passing through the inlet of the pressing part of the hot air welding machine are hot melt welded.

[0006] Further, an upper heat conducting plate and a lower heat conducting plate are fixedly arranged in the hot air cavity, and the air outlet end includes an upper air outlet hole and a lower air outlet hole;

[0007] An air inlet channel is formed between the upper heat conducting plate and the lower heat conducting plate, the air inlet channel communicates with the air inlet end, an upper air outlet channel is formed between the upper heat conducting plate and the top wall of the hot air cavity, a lower air outlet channel is formed between the lower heat conducting plate and the bottom wall of the hot air cavity, the upper air outlet channel communicates with the upper air outlet hole, and the lower air outlet channel communicates with the lower air outlet hole;

[0008] An upper bending channel is formed between the front end of the upper heat conducting plate and the welding part, and the upper bending channel communicates with the air inlet channel and the upper air outlet channel;

[0009] A lower bending channel is formed between the front end of the lower heat conduction plate and the welding part, and the lower bending channel communicates with the air inlet channel and the lower air outlet channel.

[0010] Further, a heat conduction block adapted to conduct the heat in the air inlet channel to the welding part is arranged in the air inlet channel;

[0011] The front end of the heat conduction block is fixedly connected to the welding part, and the rear end of the heat conduction block extends towards the center of the air inlet channel to form a free end.

[0012] Further, a baffle is arranged on the heated part, which is adapted to block the hot air discharged from the air outlet end from directly blowing on the material to be welded.

[0013] Further, the welding part forms an arc-shaped structure adapted to fit the shape at the inlet of the pressing part of the hot air welding machine.

[0014] Further, the material of the heat wedge body is stainless steel.

[0015] The beneficial effect of the present invention is that for the blowing heat wedge of the present invention, the externally heated air is introduced into the hot air cavity to form a heat cycle. The welding part receives the heat conducted from the hot air cavity, and hot melt welding is performed on the two materials to be welded passing through the inlet of the pressing part of the hot air welding machine. The heat required for welding is obtained by heat conduction. The hot air is discharged after passing through the hot air cavity, without the hot air directly contacting the material to be welded. The heat output range is concentrated, preventing the diffusion of hot air, avoiding the phenomena of material wrinkling and deformation and the generation of bright edges around the welding area, and improving the welding quality. The small-volume hot air cavity heat conduction welding can continuously output high-temperature heat, and the welding efficiency is high.

[0016] The baffle blocks the hot air discharged from the air outlet end from directly blowing on the material to be welded, preventing the phenomenon of hot air jetting on the material to be welded, and avoiding the phenomena of material wrinkling and deformation and the generation of bright edges around the welding area.

[0017] The hot air cavity is divided into an air inlet channel, an upper bending channel, an upper air outlet channel, a lower bending channel and a lower air outlet channel by the upper heat conduction plate and the lower heat conduction plate. So that the hot air winds through the channels in the hot air cavity, increasing the path length of the hot air passing through the channels in the hot air cavity, extending the circulation time of the hot air in the channels of the hot air cavity. The heated part and the upper and lower heat conduction plates can all absorb more heat and conduct it to the welding part, improving the heat efficiency and saving energy. During the welding process, it is not easy to generate smoke and the noise is small, meeting the environmental protection requirements.

[0018] The welding part is connected to the heat conduction block extending into the air inlet channel. The heat conduction block absorbs the heat in the air inlet channel and conducts it to the welding part, further improving the heat efficiency and saving more energy.

[0019] On the other hand, the present invention also provides a blowing heat wedge, the difference from the above invention is:

[0020] A heat conducting plate is fixedly arranged on the inner wall of the hot air cavity. The heat conducting plate divides the hot air cavity into an air inlet channel and an air outlet channel. The air inlet channel communicates with the air inlet end, and the air outlet channel communicates with the air outlet end.

[0021] A bending channel is formed between the front end of the heat conducting plate and the welding part. The bending channel communicates the air inlet channel and the air outlet channel.

[0022] The beneficial effect of the present invention is that for the blowing heat wedge of the present invention, the externally heated air is introduced into the hot air cavity to form a heat cycle. The welding part receives the heat conducted by the hot air cavity, and hot melt welding is performed on two materials to be welded passing through the inlet of the pressing part of the hot air welding machine. The heat required for welding is obtained by heat conduction. After the hot air passes through the hot air cavity, it is discharged, without the hot air directly contacting the materials to be welded. The heat output range is concentrated, preventing the diffusion of hot air and avoiding the phenomena of material wrinkling and deformation and the generation of bright edges around the welding area, thus improving the welding quality. The small-volume hot air cavity heat conduction welding can continuously output high-temperature heat, and the welding efficiency is high.

[0023] The baffle blocks the hot air discharged from the air outlet end from directly blowing on the materials to be welded, preventing the phenomenon of hot air jetting on the materials to be welded and avoiding the phenomena of wrinkling and deformation of the welded materials and the generation of bright edges around the welding area.

[0024] The hot air cavity is divided into an air inlet channel, a bending channel and an air outlet channel by the heat conducting plate, increasing the path length of the channel through which the hot air passes through the hot air cavity and prolonging the circulation time of the hot air in the channel of the hot air cavity. Both the heated part and the heat conducting plate can absorb more heat and conduct it to the welding part, improving the heat absorption rate and saving energy. During the welding process, it is not easy to generate smoke and the noise is small, meeting the environmental protection requirements.

[0025] Thirdly, the present invention also provides a heating method for the blowing heat wedge, including the following steps:

[0026] Step S1, the air heated externally is introduced into the hot air cavity from the air inlet end of the blowing heat wedge and discharged from the air outlet end to form a heat cycle.

[0027] Step S2, during the cyclic operation of the hot air, the heat of the hot air is conducted to the welding part of the blowing heat wedge so that the welding part performs hot melt welding on two materials to be welded.

[0028] Further, the heating method is suitable for being realized by using the blowing heat wedge as described above.

[0029] The beneficial effect of the present invention is that for the heating method of the blowing heat wedge of the present invention, the external hot air forms a cycle through the hot air cavity of the blowing heat wedge, and the heat of the hot air is conducted to the welding part to realize the heating of the welding part. The small-volume hot air cavity heat conduction welding can continuously output high-temperature heat, and the welding efficiency is high.

[0030] The hot air cavity is divided into an air inlet passage, an upper bent passage, an upper air outlet passage, a lower bent passage and a lower air outlet passage by an upper heat conducting plate and a lower heat conducting plate. In this way, the hot air winds through the passages in the hot air cavity, increasing the path length of the hot air passing through the passages in the hot air cavity, prolonging the circulation time of the hot air in the passages of the hot air cavity, enabling the heat receiving part and the upper and lower heat conducting plates to absorb more heat and conduct it to the welding part, improving the thermal efficiency and saving energy. During the welding process, it is not easy to generate smoke and the noise is small, meeting the environmental protection requirements.

[0031] The welding part is connected to a heat conducting block extending into the air inlet passage. The heat conducting block absorbs the heat in the air inlet passage and conducts it to the welding part, further improving the thermal efficiency and saving more energy.

[0032] The hot air cavity is divided into an air inlet passage, a bent passage and an air outlet passage by a heat conducting plate, increasing the path length of the hot air passing through the passages in the hot air cavity, prolonging the circulation time of the hot air in the passages of the hot air cavity, enabling the heat receiving part and the heat conducting plate to absorb more heat and conduct it to the welding part, increasing the heat absorption rate and saving energy. During the welding process, it is not easy to generate smoke and the noise is small, meeting the environmental protection requirements.

[0033] Fourthly, the present invention also provides a method for using a blowing hot wedge.

[0034] The welding part of the blowing hot wedge abuts against the entrance of the pressing part, and after heating, hot melt welding is performed on two materials to be welded passing through the pressing part.

[0035] The beneficial effect of the present invention is that in the method for using the blowing hot wedge of the present invention, the externally heated air is introduced into the hot air cavity to form a heat cycle. The welding part receives the heat conducted by the hot air cavity, and hot melt welding is performed on two materials to be welded passing through the entrance of the pressing part of the hot air welding machine. The heat required for welding is obtained by heat conduction. After the hot air passes through the hot air cavity, it is discharged. There is no need for the hot air to directly contact the materials to be welded. The heat output range is concentrated, preventing the hot air from spreading and avoiding phenomena such as material wrinkling and deformation and bright edges around the welding area, improving the welding quality. The small-volume hot air cavity heat conduction welding can continuously output high-temperature heat, and the welding efficiency is high.

[0036] Other features and advantages of the present invention will be described in the following description, and, in part, will be obvious from the description or learned by implementing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures specifically pointed out in the description, the claims and the drawings.

[0037] To make the above objectives, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. Description of the Drawings

[0038] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0039] Figure 1 is a schematic structural diagram of a preferred embodiment of the blowing hot wedge of the present invention;

[0040] Figure 2 is a front view of a preferred embodiment of the blowing hot wedge (opening the side wall of the hot wedge body) of the present invention;

[0041] Figure 3 is a schematic structural diagram of a first preferred embodiment of the blowing hot wedge of the present invention;

[0042] Figure 4 is of the present invention Figure 3 cross-sectional view;

[0043] Figure 5 is a schematic structural diagram of a second preferred embodiment of the blowing hot wedge of the present invention.

[0044] In the figure:

[0045] 1. Welding part; 2. Heated part; 3. Hot air cavity; 311. Air inlet channel; 312. Upper bending channel; 313. Upper air outlet channel; 314. Lower bending channel; 315. Lower air outlet channel; 321. Inlet air channel; 322. Bending channel; 323. Air outlet channel; 4. Air inlet end; 5. Air outlet end; 501. Upper air outlet hole; 502. Lower air outlet hole; 6. Upper heat conducting plate; 7. Lower heat conducting plate; 8. Heat conducting block; 9. Heat conducting plate; 10. Baffle. Specific embodiments

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0047] Embodiment 1

[0048] As Figure 1 and Figure 2As shown in the figure, the hot air wedge of this embodiment includes a hot wedge body, and the hot wedge body includes a welding part 1 and a heat receiving part 2. The heat receiving part 2 is hollow to form a hot air cavity 3. The hot air cavity 3 is provided with an air inlet end 4 and an air outlet end 5. The air inlet end 4 is connected to an air inlet pipe, and is adapted to penetrate the heated air in the air inlet pipe into the hot air cavity 3. A baffle 10 is arranged on the heat receiving part 2, which is adapted to block the hot air discharged from the air outlet end 5 from directly blowing on the material to be welded, so as to avoid the phenomena of material wrinkling, deformation and bright edges. The welding part 1 is adapted to receive the heat conducted by the hot air cavity 3, so that the two materials to be welded passing through the inlet of the pressing part of the hot air welding machine are hot-melt welded. The welding part 1 forms an arc structure adapted to fit the shape of the inlet of the pressing part of the hot air welding machine, absorbs heat sufficiently, and improves the heat efficiency. The material of the hot wedge body is made of a high-temperature heat-resistant material - stainless steel, and the temperature can be set to 700 degrees Celsius, which is durable. The externally heated air is penetrated into the hot air cavity 3 to form a heat cycle. The welding part 1 receives the heat conducted by the hot air cavity 3, and hot-melt welds the two materials to be welded passing through the inlet of the pressing part of the hot air welding machine. The heat required for welding is obtained by heat conduction. The hot air is discharged after passing through the hot air cavity 3. There is no need for the hot air to directly contact the material to be welded. The heat output range is concentrated, preventing the hot air from spreading, avoiding the phenomena of material wrinkling, deformation and bright edges around the welding area, and improving the welding quality.

[0049] As a preferred embodiment of the hot air cavity 3, as Figure 3 and Figure 4 shown, an upper heat conducting plate 6 and a lower heat conducting plate 7 are fixedly arranged in the hot air cavity 3. The air outlet end 5 includes an upper air outlet hole 501 and a lower air outlet hole 502. The rear end of the upper heat conducting plate 6 is fixedly arranged on the top wall of the hot air cavity 3, and the front end of the upper heat conducting plate 6 extends towards the welding part 1 to form a free end. The rear end of the lower heat conducting plate 7 is fixedly arranged on the bottom wall of the hot air cavity 3, and the front end of the lower heat conducting plate 7 extends towards the welding part 1 to form a free end. An air inlet channel 311 is formed between the upper heat conducting plate 6 and the lower heat conducting plate 7, and the air inlet channel 311 communicates with the air inlet end 4. An upper air outlet channel 313 is formed between the upper heat conducting plate 6 and the top wall of the hot air cavity 3, and a lower air outlet channel 315 is formed between the lower heat conducting plate 7 and the bottom wall of the hot air cavity 3. The upper air outlet channel 313 communicates with the upper air outlet hole 501, and the lower air outlet channel 315 communicates with the lower air outlet hole 502. An upper bending channel 312 is formed between the front end of the upper heat conducting plate 6 and the welding part 1, and the upper bending channel 312 communicates with the air inlet channel 311 and the upper air outlet channel 313. A lower bending channel 314 is formed between the front end of the lower heat conducting plate 7 and the welding part 1, and the lower bending channel 314 communicates with the air inlet channel 311 and the lower air outlet channel 315.

[0050] The hot air penetrates into the air inlet channel 311 from the air inlet end 4, and is divided at the welding part 1. A part of the hot air passes through the upper bending channel 312 and the upper air outlet channel 313 in sequence and is discharged through the upper air outlet hole 501. The other part of the hot air passes through the lower bending channel 314 and the lower air outlet channel 315 in sequence and is discharged through the lower air outlet hole 502. The hot air chamber 3 is divided into the air inlet channel 311, the upper bending channel 312, the upper air outlet channel 313, the lower bending channel 314 and the lower air outlet channel 315 by the upper heat conducting plate 6 and the lower heat conducting plate 7. The hot air is allowed to pass through the channel in the hot air chamber 3 in a circuitous manner, the path length of the channel through which the hot air passes through the hot air chamber 3 is increased, and the time for the hot air to circulate in the channel of the hot air chamber 3 is extended. The heat receiving part 2, the upper heat conducting plate 6 and the lower heat conducting plate 7 can absorb more heat and conduct it to the welding part 1, thereby improving thermal efficiency and saving energy. Smoke is not easily generated during welding, and the noise is low, meeting environmental protection requirements. Multiple channels are arranged in the hot air chamber 3 to make the hot air run in a circuitous manner. The area of ​​the heat receiving part 2 absorbing heat is increased, and the volume of the heat wedge body is greatly reduced, meeting the working requirements of places with compact space. The temperature in the hot air chamber 3 can be set to 700 degrees Celsius, and the heat wedge body is made of heat-resistant material, which is durable.

[0051] Preferably, Figure 3 and Figure 4 As shown, a heat conducting block 8 is provided in the air inlet channel 311, which is suitable for conducting the heat in the air inlet channel 311 to the welding portion 1. The front end of the heat conducting block 8 is fixedly connected to the welding portion 1, and the rear end of the heat conducting block 8 extends toward the center of the air inlet channel 311 to form a free end. The welding portion 1 is connected to the heat conducting block 8 extending toward the air inlet channel 311, and the heat conducting block 8 absorbs the heat in the air inlet channel 311 and conducts it to the welding portion 1, further improving the thermal efficiency and saving energy.

[0052] The beneficial effect of this embodiment is that the air-blowing hot wedge of the present invention allows external heated air to penetrate into the hot air chamber to form a heat cycle, the welding part receives the heat conducted by the hot air chamber, and the hot melt welding passes through the two materials to be welded at the entrance of the pressurizing part of the hot air welding machine. The heat required for welding is obtained by heat conduction, and the hot air is discharged after passing through the hot air chamber. There is no need for the hot air to directly contact the materials to be welded. The heat output range is concentrated to prevent the hot air from diffusing, avoiding the phenomenon of wrinkling and deformation of the material and bright edges around the welding point, thereby improving the welding quality. Small-volume hot air chamber heat conduction welding can continuously output high-temperature heat and has high welding efficiency.

[0053] The baffle blocks the hot air discharged from the air outlet from directly blowing on the material to be welded, thereby preventing the hot air from spraying on the material to be welded, and avoiding the phenomenon of wrinkling and deformation of the material and bright edges around the welding area.

[0054] The hot air cavity is divided into an air inlet channel, an upper bent channel, an upper air outlet channel, a lower bent channel and a lower air outlet channel by an upper heat conduction plate and a lower heat conduction plate. In this way, hot air winds through the channels in the hot air cavity, increasing the path length of the hot air passing through the channels in the hot air cavity, prolonging the circulation time of the hot air in the channels of the hot air cavity. Both the heated part and the upper and lower heat conduction plates can absorb more heat and conduct it to the welding part, improving the thermal efficiency and saving energy. During the welding process, it is not easy to generate smoke and the noise is small, meeting the environmental protection requirements.

[0055] The welding part is connected to a heat conduction block extending into the air inlet channel. The heat conduction block absorbs the heat in the air inlet channel and conducts it to the welding part, further improving the thermal efficiency and being more energy-saving.

[0056] Embodiment 2

[0057] As Figure 5 shown, the present invention provides another alternative embodiment of the hot air cavity 3.

[0058] The difference from Embodiment 1 is that:

[0059] A heat conduction plate 9 is fixedly arranged on the inner wall of the hot air cavity 3. The heat conduction plate 9 divides the hot air cavity 3 into an air inlet channel 321 and an air outlet channel 323. The air inlet channel 321 communicates with the air inlet end 4, and the air outlet channel 323 communicates with the air outlet end 5. A bent channel 322 is formed between the front end of the heat conduction plate 9 and the welding part 1. The bent channel 322 communicates the air inlet channel 321 and the air outlet channel 323. By dividing the hot air cavity 3 into the air inlet channel 321, the bent channel 322 and the air outlet channel 323 by the heat conduction plate 9, the path length of the hot air passing through the hot air cavity 3 is increased, and the circulation time of the hot air in the channels of the hot air cavity 3 is prolonged. Both the heated part 2 and the heat conduction plate 9 can absorb more heat and conduct it to the welding part 1, improving the heat absorption rate and saving energy. During the welding process, it is not easy to generate smoke and the noise is small, meeting the environmental protection requirements. Multiple channels are arranged in the hot air cavity 3 to make the hot air run circuitously. The area for the heated part 2 to absorb heat is increased, and the volume of the thermal wedge body is greatly reduced, meeting the working requirements in places with compact space.

[0060] The beneficial effect of this embodiment is that for the blowing thermal wedge of the present invention, the externally heated air is introduced into the hot air cavity to form a thermal cycle. The welding part receives the heat conducted by the hot air cavity and hot melt welds two materials to be welded passing through the inlet of the pressing part of the hot air welding machine. The heat required for welding is obtained by heat conduction. After the hot air passes through the hot air cavity, it is discharged. There is no need for the hot air to directly contact the materials to be welded. The heat output range is concentrated, preventing the hot air from spreading and avoiding the phenomena of material wrinkling and deformation and bright edges around the welding area, improving the welding quality. The small-volume hot air cavity heat conduction welding can continuously output high-temperature heat and has high welding efficiency.

[0061] The baffle blocks the hot air discharged from the air outlet end from directly blowing on the material to be welded, preventing the phenomenon of hot air jetting on the material to be welded, and avoiding the phenomenon of the welded material being wrinkled and deformed and bright edges being generated around the welding area.

[0062] The hot air cavity is divided into an air inlet channel, a bent channel and an air outlet channel by the heat conduction plate, increasing the path length of the hot air passing through the channels in the hot air cavity, prolonging the circulation time of the hot air in the channels of the hot air cavity. Both the heat receiving part and the heat conduction plate can absorb more heat and conduct it to the welding part, improving the heat absorption rate and saving energy. During the welding process, it is not easy to generate smoke and the noise is small, meeting the environmental protection requirements.

[0063] Embodiment III

[0064] As Figures 1 to 4 shown, on the basis of Embodiment I, Embodiment III provides a heating method for a blowing hot wedge, using the blowing hot wedge in Embodiment I above.

[0065] The heated air in the air inlet pipe penetrates into the air inlet channel 311 from the air inlet end 4, is shunted by the heat conduction block 8, and a part of the hot air passes through the upper bent channel 312 and the upper air outlet channel 313 in sequence and is discharged through the upper air outlet hole 501. Another part of the hot air passes through the lower bent channel 314 and the lower air outlet channel 315 in sequence and is discharged through the lower air outlet hole 502. During the operation of the hot air, the heat receiving part 2, the upper heat conduction plate 6, the lower heat conduction plate 7 and the heat conduction block 8 fully absorb a large amount of heat and conduct it to the welding part 1 to hot melt weld the material to be welded.

[0066] Optionally, as Figure 1 and Figure 5 shown, on the basis of Embodiment II, Embodiment III provides a heating method for a blowing hot wedge, using the blowing hot wedge in Embodiment II above.

[0067] The heated air in the air inlet pipe penetrates into the air inlet channel 321 from the air inlet end 4, and the hot air passes through the bent channel 322 and the air outlet channel 323 in sequence and is discharged through the air outlet end 5. During the operation of the hot air, the heat receiving part 2 and the heat conduction plate 9 fully absorb a large amount of heat and conduct it to the welding part 1 to hot melt weld the material to be welded.

[0068] The beneficial effects of the present invention are that the heating method of the blowing hot wedge of the present invention forms a heat cycle by introducing externally heated air into the hot air cavity. The welding part receives the heat conducted by the hot air cavity and hot melt welds the two materials to be welded passing through the inlet of the pressing part of the hot air welding machine. The heat required for welding is obtained by heat conduction. The hot air is discharged after passing through the hot air cavity, without the hot air directly contacting the material to be welded. The heat output range is concentrated, preventing the hot air from spreading, avoiding the phenomenon of the material being wrinkled and deformed and bright edges being generated around the welding area, and improving the welding quality. The small-volume hot air cavity heat conduction welding can continuously output high-temperature heat, and the welding efficiency is high.

[0069] The hot air cavity is divided into an air inlet passage, an upper bent passage, an upper air outlet passage, a lower bent passage and a lower air outlet passage by an upper heat conducting plate and a lower heat conducting plate. So that the hot air winds through the passages in the hot air cavity, increasing the path length of the hot air passing through the passages of the hot air cavity, prolonging the circulation time of the hot air in the passages of the hot air cavity, enabling the heated part and the upper and lower heat conducting plates to absorb more heat and conduct it to the welding part, improving the thermal efficiency and saving energy. During the welding process, it is not easy to generate smoke, with low noise, meeting the environmental protection requirements.

[0070] The welding part is connected to a heat conducting block extending into the air inlet passage, and the heat conducting block absorbs the heat in the air inlet passage and conducts it to the welding part, further improving the thermal efficiency and being more energy-saving.

[0071] The hot air cavity is divided into an air inlet passage, a bent passage and an air outlet passage by a heat conducting plate, increasing the path length of the hot air passing through the passages of the hot air cavity, prolonging the circulation time of the hot air in the passages of the hot air cavity, enabling the heated part and the heat conducting plate to absorb more heat and conduct it to the welding part, increasing the heat absorption rate and saving energy. During the welding process, it is not easy to generate smoke, with low noise, meeting the environmental protection requirements.

[0072] Embodiment Four

[0073] As Figure 1 shown, on the basis of Embodiment Three, Embodiment Four provides a using method of a blowing heat wedge, adopting the blowing heat wedge in Embodiment One or Two above.

[0074] The welding part 1 of the blowing heat wedge abuts against the entrance of the pressing part, and the welding part 1 is heated by adopting the heating method in Embodiment Three or Four, and the heated welding part 1 performs hot melt welding on two materials to be welded passing through the pressing part.

[0075] The beneficial effect of the present invention is that for the using method of the blowing heat wedge of the present invention, the externally heated air is introduced into the hot air cavity to form a heat cycle, the welding part receives the heat conducted by the hot air cavity, and hot melt welding is performed on two materials to be welded passing through the entrance of the pressing part of the hot air welding machine. The heat required for welding is obtained by heat conduction, and the hot air is discharged after passing through the hot air cavity. There is no need for the hot air to directly contact the materials to be welded, the heat output range is concentrated, preventing the hot air from spreading, avoiding the phenomena of material wrinkling and deformation and bright edges generated around the welding area, and improving the welding quality. The small-volume hot air cavity heat conduction welding can continuously output high-temperature heat, with high welding efficiency.

[0076] All the devices (components without specific structures described) selected in this application are common standard parts or parts known to those skilled in the art, and their structures and principles can all be known by those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0077] In the description of the embodiments of the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0078] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0079] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For another example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some communication interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0080] The units described as separate components may or may not be physically separated. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0081] In addition, in each embodiment of the present invention, the functional units can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

[0082] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A blowing heat wedge, characterized in that it includes a heat wedge body, the heat wedge body includes a welding part (1) and a heated part (2), the heated part (2) is hollow to form a hot air cavity (3), and the hot air cavity (3) is provided with an air inlet end (4) and an air outlet end (5); the welding part (1) is adapted to receive the heat conducted by the hot air cavity (3) so as to thermally weld two materials to be welded passing through the inlet of the pressing part of the hot air welding machine; an upper heat conducting plate (6) and a lower heat conducting plate (7) are fixedly arranged in the hot air cavity (3), and the air outlet end (5) includes an upper air outlet hole (501) and a lower air outlet hole (502); an air inlet channel (311) is formed between the upper heat conducting plate (6) and the lower heat conducting plate (7), the air inlet channel (311) communicates with the air inlet end (4), an upper air outlet channel (313) is formed between the upper heat conducting plate (6) and the top wall of the hot air cavity (3), a lower air outlet channel (315) is formed between the lower heat conducting plate (7) and the bottom wall of the hot air cavity (3), the upper air outlet channel (313) communicates with the upper air outlet hole (501), and the lower air outlet channel (315) communicates with the lower air outlet hole (502); an upper bending channel (312) is formed between the front end of the upper heat conducting plate (6) and the welding part (1), and the upper bending channel (312) communicates the air inlet channel (311) and the upper air outlet channel (313); a lower bending channel (314) is formed between the front end of the lower heat conducting plate (7) and the welding part (1), and the lower bending channel (314) communicates the air inlet channel (311) and the lower air outlet channel (315); the welding part (1) forms an arc structure adapted to fit the shape at the inlet of the pressing part of the hot air welding machine; the welding part continuously welds the materials to be welded; a heat conducting block (8) adapted to conduct the heat in the air inlet channel (311) to the welding part (1) is arranged in the air inlet channel (311); the front end of the heat conducting block (8) is fixedly connected to the welding part (1), and the rear end of the heat conducting block (8) extends towards the center of the air inlet channel (311) to form a free end; the material of the heat wedge body is stainless steel.

2. The blowing heat wedge according to claim 1, characterized in that a baffle (10) is arranged on the heated part (2) and is adapted to block the hot air discharged from the air outlet end (5) from directly blowing on the materials to be welded.

3. A heating method for a blowing hot wedge, characterized in that Using the blowing heat wedge according to any one of claims 1-2, includes the following steps: Step S1, the air heated by the outside penetrates into the hot air cavity (3) from the air inlet end (4) of the blowing heat wedge and is discharged from the air outlet end (5) to form a heat cycle; Step S2, during the cyclic operation of the hot air, the heat of the hot air is conducted to the welding part (1) of the blowing heat wedge so as to thermally weld two materials to be welded by the welding part (1).

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