A production process of a non-woven fabric heating sheet and a heating sheet made by the production process

Abstract

The application relates to a non-woven fabric heating sheet production process and a heating sheet made by the production process, and belongs to the technical field of heating sheet production. The production process comprises the following steps: sewing or needling a plurality of parallel partition strips out of non-woven fabric, forming threading gaps between the two adjacent partition strips to form wiring channels for arranging electric heating wires between the non-woven fabrics; threading the electric heating wire into one end of one threading gap and threading the electric heating wire out of the other end, then entering the other threading gap along the end of the partition strip until the electric heating wire passes through all the threading gaps; the electric heating wire comprises an arrangement section arranged in the wiring channel, a starting section connected to the starting end of the arrangement section and extending to the outside of the non-woven fabric, and an ending section connected to the ending end of the arrangement section and extending to the outside of the non-woven fabric, the starting section and the ending section are stretched to the same side of the non-woven fabric; the edges of the non-woven fabric are sewn, and the starting section and the ending section of the electric heating wire are connected with a controller or a plug to obtain the heating sheet. The application can conveniently thread the heating wire of the heating sheet.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of non-woven fabric heating sheet production, in particular to a non-woven fabric heating sheet production process and a heating sheet made by the production process. BACKGROUND

[0002] The non-woven fabric heating sheet is a heating blanket element obtained by pasting a heating wire between two non-woven fabrics. The non-woven fabric heating sheet has the characteristics of lightness, simple installation and uniform heat transfer, and is an ideal heating element for designing various low-temperature heating applications, and is widely used in the fields of indoor rooms and automobile seat cushions.

[0003] Referring to Figure 1 The non-woven fabric heating sheet 1 is composed of two layers of non-woven fabrics 11 and an electric heating wire 12 arranged between the two layers of non-woven fabrics 11. The non-woven fabric heating sheet 1 is provided with a threading area 16 for arranging the electric heating wire 12, and the electric heating wire 12 is arranged in a serpentine shape in the threading area 16 and between the two layers of non-woven fabrics 11. The non-woven fabric heating sheet 1 is provided with a plurality of partition strips 13 arranged along the length direction of the threading area 16, and the partition strips 13 are parallel to the width direction of the non-woven fabric heating sheet 1. The partition strips 13 are connected to the edges on both sides of the non-woven fabric heating sheet 1, and a wiring channel 15 for threading the electric heating wire 12 is formed between the adjacent two partition strips 13.

[0004] When the non-woven fabric heating sheet 1 is threaded with the electric heating wire 12, the starting end of the electric heating wire 12 is connected to a threading needle, and the threading needle is inserted from a threading opening on one side. When the threading needle is threaded to a position close to the threading opening on the other side, the worker needs to manually thread the threading needle through the partition strips 13 along the length direction of the non-woven fabric heating sheet 1, so that the threading needle is threaded into the adjacent wiring channel 15, and then the electric heating wire 12 is continuously threaded in the wiring channel 15 through the threading needle, so that the electric heating wire 12 can be arranged in a serpentine shape in the threading area 16.

[0005] According to the related art, the inventor believes that in the threading process, the worker needs to manually thread the threading needle through the partition strips 13 between the adjacent two wiring channels 15, and bend the electric heating wire 12. In this threading process, the electric heating wire is easy to be worn and twisted in the subsequent pulling process, and the bending position of the electric heating wire between the non-woven fabrics 11 is not uniform, which affects the quality of the non-woven fabric heating sheet 1. SUMMARY

[0006] In order to facilitate the threading and arrangement of the electric heating wire of the non-woven fabric heating sheet, the present application provides a non-woven fabric heating sheet production process.

[0007] In a first aspect, the present application provides a non-woven fabric heating sheet production process, which adopts the following technical solution:

[0008] The method comprises the following steps: step one, stacking several layers of non-woven fabrics; step two, sewing or needling several parallel partition strips on the stacked non-woven fabrics, and forming threading gaps between adjacent two partition strips to form wiring channels for the serpentine arrangement of the electric heating wires; step three, threading the electric heating wire into one end of a threading gap and out of the other end, and then entering the other threading gap along the end of the partition strip, and repeating the process until the electric heating wire passes through all the threading gaps and is arranged in the wiring channels; step four, after the electric heating wire passes through all the threading gaps, the electric heating wire comprises an arranged section arranged in the wiring channel, a starting section connected to the starting end of the arranged section and extending to the outside of the non-woven fabric, and an ending section connected to the ending end of the arranged section and extending to the outside of the non-woven fabric, the starting section and the ending section are stretched to the same side of the non-woven fabric; step five, sewing the edges of the non-woven fabric, and connecting the starting section and the ending section of the electric heating wire with the controller or the plug to obtain the heating sheet.

[0009] By adopting the above technical scheme, when producing the heating sheet, the several layers of non-woven fabrics are sewn or needled to form several parallel partition strips on the non-woven fabrics, and the threading gaps are formed between the adjacent two partition strips to form the wiring channels for the serpentine arrangement of the electric heating wires. When threading the electric heating wire, the electric heating wire can be threaded into one end of the threading gap and out of the other end, and then the electric heating wire is bent along the end of the partition strip to be threaded into the adjacent threading gap. Since the partition strip is closed and sewn, and the end of the threading gap is not sewn and is open, when the electric heating wire is threaded, the electric heating wire can be wound along the end of the partition strip, so that the bending of the electric heating wire is facilitated, and the abrasion of the electric heating wire caused by the friction between the two non-woven fabrics is reduced.

[0010] Preferably, in step four, after the ending section of the electric heating wire is arranged on one layer of non-woven fabric in a specified direction, glue is sprayed on the ending section and the non-woven fabric near the ending section, and then the upper layer of non-woven fabric is evenly covered on the layer of non-woven fabric to fix the electric heating wire.

[0011] By adopting the technical scheme, when the electric heating wire is wound in the wiring channel, the starting section of the electric heating wire extends to one side of the wiring channel and protrudes to the outside of the non-woven fabric, the tail section of the electric heating wire surrounds the wiring channel and is pulled out from the same side of the starting section to the outside of the non-woven fabric, so that the starting section and the tail section of the electric heating wire can be pulled out together and connected with the controller or the plug, the tail section of the electric heating wire is wound outside the wiring channel, so that the tail section is easy to jump between the non-woven fabrics, the glue is sprayed on the non-woven fabric near the tail section, and the non-woven fabric on the upper side of the tail section is evenly covered on the non-woven fabric on the bottom side, so that the two layers of non-woven fabrics can be bonded by the glue, and the tail section can be bonded to the non-woven fabric, so that the jumping of the tail section on the non-woven fabric can be reduced.

[0012] Preferably, when the upper layer of non-woven fabric of the tail section of the electric heating wire is covered on the lower layer of non-woven fabric, the upper and lower layers of non-woven fabric are continuously pressed at the position where the glue is sprayed.

[0013] By adopting the technical scheme, the non-woven fabric on the upper side of the tail section is covered on the non-woven fabric on the bottom side, so that the non-woven fabric on the upper side is bonded to the non-woven fabric on the bottom side, the connection mode is more convenient, and the upper and lower layers of non-woven fabric are continuously pressed at the position where the glue is sprayed, so that the jumping of the upper and lower layers of non-woven fabric during the pressing process can be reduced to cause wrinkles, and the upper and lower layers of non-woven fabric can be pressed more evenly.

[0014] Preferably, in step three, the electric heating wire is pulled tight when it passes through each threading gap.

[0015] By adopting the technical scheme, when the electric heating wire is threaded, the electric heating wire is pulled tight when it passes through each threading gap, so that the electric heating wire can be threaded more evenly in the threading gap of the non-woven fabric, and the bending of the electric heating wire in the threading gap can be reduced.

[0016] Preferably, in step three, before the electric heating wire is threaded through the threading gap, the end of the starting section of the electric heating wire is connected to a threading needle, and the threading needle is threaded through the threading gap.

[0017] By adopting the technical scheme, when the electric heating wire is threaded, the end of the electric heating wire is connected to the threading needle, and the threading needle is threaded through the threading gap with the electric heating wire, so that the threading of the electric heating wire is facilitated.

[0018] Preferably, in step one, the two ends of the separation strip are arc-shaped.

[0019] By adopting the technical scheme, the electric heating wire is bent and arranged in the threading gap during threading, and when the electric heating wire is arranged in the adjacent two threading gaps, the electric heating wire is bent and abuts against the end of the partition strip, the end of the partition strip is provided in an arc shape, so that the arc-shaped end can guide the bending of the electric heating wire, and the wear between the end of the partition strip and the outer side of the electric heating wire can be reduced.

[0020] Preferably, the adjacent two partition strips are staggered and arranged in front and back, and the ends of the interval partition strips are flush.

[0021] By adopting the technical scheme, the adjacent two partition strips are staggered and arranged, so that the heating area can be increased under the condition that the lengths of the partition strips are the same, and the ends of the interval partition strips are flush, so that the heating of the heating sheet is more uniform.

[0022] Preferably, in step four, the end segment of the electric heating wire exposed to the outside of the wiring channel abuts against one end of the partition strip in a straight line direction.

[0023] By adopting the technical scheme, the end segment of the electric heating wire abuts against one end of the partition strip, so that the end segment of the electric heating wire can be limited by the end of the partition strip, so that the end segment of the electric heating wire can be conveniently positioned, so as to be fixed in subsequent steps.

[0024] In the second aspect, the application provides a heating sheet, which adopts the following technical scheme:

[0025] A heating sheet is made of the non-woven fabric heating sheet production process.

[0026] In summary, the application has at least one of the following beneficial technical effects:

[0027] 1. The application stitches or needles the partition strips on the stacked non-woven fabric to form threading gaps for the electric heating wire to pass through, so as to form a wiring channel for the electric heating wire to be arranged in a meandering manner on the non-woven fabric. During threading, the partition strips are provided in a stitched closed shape, and the ends of the threading gaps are not stitched, so that when the electric heating wire passes through, the electric heating wire can be arranged around the ends of the partition strips, so that the bending of the electric heating wire is facilitated.

[0028] 2. The electric heating wire of the application includes an arrangement segment arranged in the wiring channel, a starting segment connected to the starting end of the arrangement segment and extending to the outside of the non-woven fabric, and an end segment connected to the end end of the arrangement segment and extending to the outside of the non-woven fabric. After the electric heating wire passes through all the threading gaps, the end segment and the starting segment of the electric heating wire are stretched to the same side of the non-woven fabric for connection with the controller or the plug, and the end segment of the electric heating wire exposed to the outside of the wiring channel abuts against one end of the partition strip, so that the end segment can be limited by the end of the partition strip.

[0029] 3. The upper layer of non-woven fabric of the end section of the electric heating wire of the present application is covered on the lower layer of non-woven fabric, the position of spraying glue on the upper and lower layers of non-woven fabric is continuously pressed, and the upper and lower layers of non-woven fabric are glued through the glue. The connection method is more convenient, and the upper and lower layers of non-woven fabric need to be continuously pressed during the gluing process, which can reduce the wrinkle caused by the movement of the upper and lower layers of non-woven fabric during the pressing process. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a non-woven fabric heating sheet structure schematic diagram in the background art of the present application.

[0031] Figure 2 It is a non-woven fabric heating sheet structure schematic diagram of the non-woven fabric heating sheet production process of embodiment 1 of the present application.

[0032] Figure 3 It is a heating sheet structure schematic diagram of embodiment 3 of the present application.

[0033] Figure 4 It is a whole structure schematic diagram of a threading equipment of a non-woven fabric heating sheet production process of embodiment 4 of the present application.

[0034] Figure 5 It is a partial structure schematic diagram of a threading equipment of a non-woven fabric heating sheet production process of embodiment 4 of the present application Figure 1 .

[0035] Figure 6 It is a partial structure schematic diagram of a threading equipment of a non-woven fabric heating sheet production process of embodiment 4 of the present application Figure 2 .

[0036] Figure 7 It is a partial sectional view of a threading equipment of a non-woven fabric heating sheet production process of embodiment 4 of the present application.

[0037] Explanation of reference signs: 1, non-woven fabric heating sheet; 11, non-woven fabric; 12, electric heating wire; 121, arrangement section; 122, starting section; 123, end section; 13, separation strip; 131, first stitching part; 132, second stitching part; 14, threading gap; 15, wiring channel; 16, threading area; 2, threading equipment; 21, bottom plate; 211, accommodation through hole; 22, threading head; 221, driving groove; 23, winding drum; 3, pressing device; 31, pressing convex part; 311, guide part; 32, pressing top plate; 4, lead device; 41, traction assembly; 411, lead member; 412, first driving air cylinder; 5, line turning device; 51, driving insertion column; 52, second driving air cylinder; 53, third driving air cylinder; 54, material turning disc. DETAILED DESCRIPTION

[0038] The application will be further described below with reference to the accompanying drawings. Figures 2-7 The application will be further described below with reference to the accompanying drawings.

[0039] The coordinate system XYZ is set in the drawings of the embodiments of the application, wherein the positive direction of the X axis represents the front side, the reverse direction of the X axis represents the rear side, the positive direction of the Y axis represents the right side, the reverse direction of the Y axis represents the left side, the positive direction of the Z axis represents the upper side, and the reverse direction of the Z axis represents the lower side.

[0040] Embodiment 1

[0041] Embodiment 1 of the application discloses a production process of a non-woven fabric heating sheet. Referring to FIG. 1, the production process of the non-woven fabric heating sheet comprises the following steps. Figure 2 The production process of the non-woven fabric heating sheet comprises the following steps.

[0042] Step 1: Stack several layers of non-woven fabric 11. In this embodiment, two pieces of non-woven fabric 11 are arranged in a stacked manner, and an electric heating wire 12 is arranged between the two pieces of non-woven fabric 11, thereby obtaining a non-woven fabric heating sheet 1. The non-woven fabric heating sheet 1 has the advantages of lightness and simple installation.

[0043] Step 2: Sew or needle punch the two pieces of stacked non-woven fabric 11 to form several parallel partition strips 13 on the two pieces of non-woven fabric 11. A threading gap 14 is formed between two adjacent partition strips 13 to form a wiring channel 15 for the serpentine arrangement of the electric heating wire 12 between the non-woven fabric 11. In this embodiment, the partition strips 13 are arranged in a closed strip-shaped area, and during the sewing or needle punching process, the edges of the partition strips 13 are closed at intervals, thereby forming partition strips 13 for connecting the upper and lower two pieces of non-woven fabric 11. The adjacent partition strips 13 are not sewn, thereby forming a threading gap 14 for the electric heating wire 12 to pass through, and the threading gaps 14 are connected to form a wiring channel 15 for the electric heating wire 12 to pass through.

[0044] Step 3: Insert the electric heating wire 12 into one end of a threading gap 14, so that the electric heating wire 12 comes out at the other end of the threading gap 14, and then the electric heating wire 12 is inserted into another threading gap 14 along the end of the partition strip 13, and so on until the electric heating wire 12 passes through all the threading gaps 14 and is arranged in a serpentine manner in the wiring channel 15.

[0045] Step 4: The electric heating wire 12 arranged between the non-woven fabric 11 comprises an arrangement section 121 arranged in the wiring channel 15, a starting section 122 connected to the starting end of the arrangement section 121 and extending to the outside of the non-woven fabric 11, and an ending section 123 connected to the ending end of the arrangement section 121 and extending to the outside of the non-woven fabric 11. After the electric heating wire 12 passes through all the threading gaps 14, the starting section 122 and the ending section 123 are stretched to the same side of the non-woven fabric 11.

[0046] Step five, sew the edge of the non-woven fabric 11. And the starting segment 122 and the end segment 123 of the heating wire 12 are connected with the controller or the plug, thus the heating sheet is made.

[0047] Referring to Figure 2 , in step one, the two ends of the partition strip 13 are arranged in a circular arc shape. In this embodiment, the partition strip 13 is arranged along the length direction of the non-woven fabric 11, so that the extension direction of the partition strip 13 is parallel to the width direction of the non-woven fabric 11. The two ends of the partition strip 13 are sewn in a circular arc shape, so that the circular arc passage for the heating wire 12 to bend through is formed between the adjacent two threading gaps 14. When the heating wire 12 is threaded, the heating wire 12 is bent and arranged in the threading gap 14, and the heating wire 12 is bent and abuts against the end of the partition strip 13, so that the circular arc-shaped end can guide the bending of the heating wire 12, and the wear of the end of the partition strip 13 and the outer side of the heating wire 12 can be reduced.

[0048] Referring to Figure 2 , the adjacent two partition strips 13 are staggered in front and back, and the two ends of the spaced partition strips 13 are flush. In this embodiment, the lengths of the partition strips 13 are the same, and the adjacent two partition strips 13 are staggered in front and back, that is, staggered up and down in the drawing, so that the partition strips 13 are sequentially defined as a first sewing part 131 and a second sewing part 132. The first sewing part 131 and the second sewing part 132 are staggered, the second sewing part 132 is arranged on the upper side of the first sewing part 131, and the two ends of the first sewing part 131 are flush, and the two ends of the second sewing part 132 are flush. When the heating wire 12 is arranged in the threading passage 15, the heating wire 12 is threaded into the threading gap 14 between the first sewing part 131 and the second sewing part 132 from the outer side of the non-woven fabric 11, so that the heating wire 12 penetrates through the threading gap 14, and then the heating wire 12 is bent along the end of the second sewing part 132 to be threaded into the adjacent threading gap 14, and the heating wire 12 is sequentially threaded through all the threading gaps 14.

[0049] Referring to Figure 2 , in step three, the heating wire 12 is tensioned when it passes through each threading gap 14. Since the heating wire 12 is a flexible wire, the heating wire 12 is prone to bending and creasing in the threading gap 14 between the partition strips 13 during the threading process. Therefore, the heating wire 12 is tensioned when it passes through each threading gap 14, so that the heating wire 12 can be more flatly threaded in the threading gap 14 of the non-woven fabric 11, and the bending of the heating wire 12 in the threading gap 14 is reduced.

[0050] Referring to Figure 2, the threading mode of the electric heating wire 12 can be set in multiple modes. In the embodiment, before the electric heating wire 12 is threaded through the threading gap 14 in step three, the end of the starting segment 122 of the electric heating wire 12 is connected to a threading needle, and the threading needle is threaded through the threading gap 14. In the threading process in step three, since the two pieces of non-woven fabric 11 are stitched or needled by the separation strip 13 and then attached together, the electric heating wire 12 is less likely to be threaded through the threading gap 14 when the electric heating wire 12 is threaded. The electric heating wire 12 is threaded through the threading gap 14 by the threading needle, so that the threading of the electric heating wire 12 is facilitated.

[0051] Referring to Figure 2 , in step four, the end segment 123 of the electric heating wire 12 extending out of the wiring channel 15 abuts against one end of the separation strip 13 in a straight line direction. In the embodiment, after the arrangement segment 121 of the electric heating wire 12 is threaded through all the threading gaps 14, the end segment 123 of the electric heating wire 12 is threaded out of the last threading gap 14, and the end segment 123 is stretched along the width direction of the non-woven fabric 11 to the same side where the starting segment 122 is threaded in, and the end segment 123 is caused to abut against the top end of the second stitching part 132, so that the end segment 123 of the electric heating wire 12 is limited by the end of the separation strip 13, and the end segment 123 of the electric heating wire 12 is positioned, so that the end segment 123 of the electric heating wire 12 is fixed in the subsequent process.

[0052] Referring to Figure 2When the end section 123 of the heating wire 12 is arranged, the fixing method of the end section 123 can be various. In the embodiment, in step four, after the end section 123 of the heating wire 12 is arranged on the bottom layer of the non-woven fabric 11 along the specified direction, glue is sprayed on the end section 123 and the non-woven fabric 11 near the end section 123, and then the non-woven fabric 11 on the upper side of the end section 123 is evenly covered on the bottom layer of the non-woven fabric 11 to fix the heating wire 12. The arranged section 121 of the heating wire 12 is arranged in the wiring channel 15, the starting section 122 of the heating wire 12 extends to one side of the wiring channel 15 and protrudes to the outside of the non-woven fabric 11, and the end section 123 of the heating wire 12 extends to the same side of the starting section 122 along one side of the wiring channel 15 and protrudes to the outside of the non-woven fabric 11, so that the starting section 122 and the end section 123 of the heating wire 12 can be pulled out together and connected with the controller or the plug. Since the end section 123 of the heating wire 12 extends to the outside of the wiring channel 15 and one side of the end section 123 abuts against the end of the second stitching part 132, the other side of the end section 123 is not sewn with the thread, so that the end section 123 is easy to jump between the non-woven fabrics 11. The glue is sprayed on the non-woven fabric 11 near the end section 123, and the non-woven fabric 11 on the upper side of the end section 123 is evenly covered on the bottom layer of the non-woven fabric 11, so that the two layers of the non-woven fabric 11 can be bonded by the glue, the end section 123 can be bonded to the non-woven fabric 11, and the jumping of the end section 123 on the non-woven fabric 11 can be reduced. The fixing method is relatively convenient.

[0053] Referring to Figure 2 When the glue is sprayed on the non-woven fabric 11 near the end section 123 of the heating wire 12 and the non-woven fabric 11 on the upper side of the end section 123 is covered on the bottom layer of the non-woven fabric 11, the upper and lower layers of the non-woven fabric 11 are continuously pressed at the position where the glue is sprayed. The non-woven fabric 11 on the upper side of the end section 123 is covered on the bottom layer of the non-woven fabric 11, so that the non-woven fabric 11 on the upper side is bonded to the non-woven fabric 11 on the bottom side. The connection method is relatively convenient, and when the upper and lower layers of the non-woven fabric 11 are bonded, the position where the glue is sprayed on the upper and lower layers of the non-woven fabric 11 is continuously pressed, so that the jumping of the upper and lower layers of the non-woven fabric 11 during the pressing process can be reduced to cause wrinkles, and the upper and lower layers of the non-woven fabric 11 can be pressed relatively flat.

[0054] The implementation principle of the non-woven fabric heating sheet production process of the embodiment 1 is as follows:

[0055] In the production of the heating sheet, two pieces of non-woven fabric 11 are stacked on top of each other, and the two pieces of non-woven fabric 11 are stitched or needled to form a plurality of parallel partition strips 13 on the non-woven fabric 11, so that a threading gap 14 is formed between two adjacent partition strips 13, thereby forming a wiring channel 15 for the serpentine arrangement of the electric heating wire 12. When the electric heating wire 12 is threaded, the electric heating wire 12 is threaded into one end of the threading gap 14 and threaded out of the other end. Then, the electric heating wire 12 is bent along the end of the partition strip 13, so that the electric heating wire 12 is threaded into the adjacent threading gap 14. The electric heating wire 12 is threaded through all the threading gaps 14, so that the arranged section 121 of the electric heating wire 12 is serpentine arranged in the wiring channel 15. The tail section 123 of the electric heating wire 12 is stretched from one side of the wiring channel 15 to the same side of the starting section 122, so that the tail section 123 and the starting section 122 are connected to the controller or the plug. The tail section 123 and the non-woven fabric 11 near the tail section 123 are sprayed with glue, and the two pieces of non-woven fabric 11 are bonded, thereby completing the fixation of the electric heating wire 12.

[0056] Embodiment 2

[0057] The embodiment 2 of the present application discloses a heating sheet. Referring to Figure 2 , the heating sheet is made by the non-woven fabric heating sheet production process described above.

[0058] Embodiment 3

[0059] Referring to Figure 3 , the embodiment and the non-woven fabric heating sheet production process in embodiment 1 are the same except for the structure of the partition strip 13 of the non-woven fabric heating sheet 1.

[0060] In this embodiment, in step two, the first stitching part 131 of the partition strip 13 is arranged as a long-short alternating threading area, the bottom end of the first stitching part 131 is flush, and the top end of the first stitching part 131 is arranged in long-short alternation. The second stitching part is also arranged as a long-short alternating threading area, the bottom end of the second stitching part 132 is arranged in long-short alternation, and the top end of the second stitching part 132 is flush. In this way, the electric heating wire 12 can be long-short alternately bent and arranged on the non-woven fabric 11, thereby reducing the threading length of the electric heating wire 12 while maintaining uniform heating of the heating sheet.

[0061] Embodiment 4

[0062] Referring to Figure 4 , the embodiment and the non-woven fabric heating sheet production process in embodiment 1 are the same except for the threading process in the threading step.

[0063] In the embodiment, the threading device 2 is used to arrange the heating wire 12 between the two non-woven fabrics 11 in the threading step. The threading device 2 comprises a base plate 21 for placing the non-woven fabrics 11, a pressing device 3 for pressing the non-woven fabrics 11 completed with stitching on the base plate 21, a winding drum 23 arranged at one side of the base plate 21 and used for winding the heating wire 12, a threading head 22 used for being mounted at the end of the heating wire 12 and capable of sliding through the threading gap 14, a leading device 4 used for leading the threading head 22, and a transferring device 5 arranged at one side of the threading gap 14 and used for transferring the threading head 22 from one threading gap 14 to the adjacent threading gap 14.

[0064] Referring to Figure 4 and Figure 5 , the pressing device 3 is provided with a pressing protrusion 31 abutting with the partition strip 13 one by one. And the two ends of the pressing protrusion 31 have a guide portion 311. In the embodiment, the pressing device 3 is arranged as a pressing top plate 32 vertically sliding above the base plate 21, and the base plate 21 is provided with a fixing frame for mounting the pressing top plate 32, and the fixing frame is provided with a lifting cylinder for driving the pressing top plate 32 to vertically slide, and the lifting cylinder is fixedly connected with the pressing top plate 32, so that the pressing top plate 32 can be lifted and lowered by the lifting cylinder. The pressing protrusion 31 is arranged as a protrusion facing the base plate 21, and the left and right ends of the pressing protrusion 31 are provided with guide curves, thereby forming the guide portion 311 of the pressing protrusion 31.

[0065] When the non-woven fabric heating sheet 1 is threaded by the threading device 2, the non-woven fabric heating sheet 1 can be pressed on the base plate 21 by the pressing device 3, so that the pressing protrusion 31 on the pressing device 3 is pressed on the partition strip 13 of the non-woven fabric heating sheet 1, thereby the threading gap 14 between the partition strips 13 can be easily exposed, and when the transferring device 5 drives the threading head 22 to transfer, the threading head 22 can bend along the guide portion 311 of the two ends of the pressing protrusion 31 with the heating wire 12, thereby the winding of the heating wire 12 can be guided by the guide portion 311.

[0066] Referring to Figure 6, the lead device 4 comprises a plurality of traction assemblies 41 arranged one-to-one corresponding to the threading gaps 14, and the traction assemblies 41 corresponding to adjacent threading gaps 14 are arranged staggeredly. The traction assembly 41 comprises a lead member 411 magnetically attracted to the threading head 22 and a first driving cylinder 412 for mounting and driving the lead member 411 to slide along the threading gap 14. One end of the threading head 22 is used for connecting the electric heating wire 12, and the other end of the threading head 22 is magnetically attracted to the lead member 411. The lead member 411 is provided with a first magnet at the end away from the first driving cylinder 412, and the end of the threading head 22 is provided with a second magnet attracted to the first magnet, so that the threading head 22 can be attracted by the lead member 411, so that the lead member 411 drives the threading head 22 to slide in the threading gap 14 of the non-woven fabric heating sheet 1.

[0067] Referring to Figure 7 , the bottom of the threading head 22 is provided with at least two driving grooves 221. The thread transferring device 5 comprises a driving plug 51 corresponding to the driving grooves 221, a second driving cylinder 52 for driving the driving plug 51 to ascend and descend, and a third driving cylinder 53 for driving the second driving cylinder 52 to rotate. In this embodiment, the thread transferring device 5 is arranged in the bottom plate 21, and the third driving cylinder 53 is provided with a material rotating disc 54 for mounting the second driving cylinder 52, and the bottom plate 21 is provided with a clearance through hole 211 for the driving plug 51 to slide through.

[0068] The implementation principle of the threading equipment 2 of the non-woven fabric heating sheet 1 in the third embodiment of the present application is as follows:

[0069] In the threading step, the electric heating wire 12 can be threaded by the threading equipment 2. The non-woven fabric heating sheet 1 is placed on the bottom plate 21, the end of the initial section 122 of the electric heating wire 12 is connected to the threading head 22, the threading head 22 is pulled from one end to the other end of the threading gap 14 by the traction assembly 41 corresponding to the first threading gap 14, then the threading head 22 is transferred from one threading gap 14 to the adjacent other threading gap 14 by the thread transferring device 5 arranged between the two threading gaps 14. Thus, the threading head 22 can be reciprocally threaded and transferred by the traction assembly 41 and the thread transferring device 5, and the electric heating wire 12 can be arranged in the threading gap 14 of the non-woven fabric heating sheet 1 by the traction of the threading head 22. The threading equipment 2 can improve the automation degree of the threading of the non-woven fabric heating sheet 1.

[0070] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A manufacturing process for nonwoven fabric heating elements, characterized in that, Includes the following steps: Step 1: Stack several layers of non-woven fabric (11) together; Step 2: Sew or puncture several parallel dividing strips (13) into the stacked non-woven fabric (11), and form a threading gap (14) between two adjacent dividing strips (13) so that a wiring channel (15) for the serpentine arrangement of the power supply heating wire (12) is formed between the non-woven fabric (11). Step 3: Insert the heating wire (12) through one end of a wire-threading gap (14), and exit through the other end of the wire-threading gap (14). Then, insert the end of the wire (12) along the separator strip (13) into another wire-threading gap (14), and so on, until it passes through all the wire-threading gaps (14) and the heating wire (12) is arranged in a serpentine manner in the wiring channel (15). Step 4: After the heating wire (12) passes through all the wire gaps (14), the heating wire (12) includes a placement section (121) arranged in the wiring channel (15), a starting section (122) connected to the starting end of the placement section (121) and extending to the outside of the nonwoven fabric (11), and a ending section (123) connected to the ending end of the placement section (121) and extending to the outside of the nonwoven fabric (11). The starting section (122) and the ending section (123) are stretched to the same side of the nonwoven fabric (11). Step 5: Sew the edges of the non-woven fabric (11) together, and connect the starting section (122) and the ending section (123) of the heating wire (12) to the controller or plug to obtain the heating element; In the threading step, a threading device (2) is used to arrange the heating wire (12) between two pieces of nonwoven fabric (11). The threading device (2) includes a base plate (21) for placing the nonwoven fabric (11), a pressing device (3) for pressing the nonwoven fabric (11) onto the base plate (21), a spool (23) set on one side of the base plate (21) for winding the heating wire (12), and a spool for mounting at the end of the heating wire (12) and capable of sliding through. The device includes a threading head (22) in the threading gap (14), a lead wire device (4) for pulling the threading head (22), and a turning device (5) located on one side of the threading gap (14) for turning the threading head (22) from one threading gap (14) to an adjacent threading gap (14); the clamping device (3) is provided with clamping protrusions (31) that correspond to the separator (13) and have guide surfaces at both ends; The lead wire device (4) includes multiple traction components (41) arranged one-to-one with the wire threading gap (14), and the traction components (41) corresponding to adjacent wire threading gaps (14) are arranged alternately; the traction component (41) includes a lead wire member (411) that magnetically engages with the lead wire head (22) and a first drive cylinder (412) for installing the lead wire member (411) and driving the lead wire member (411) to slide along the wire threading gap (14); one end of the lead wire head (22) is used for connecting the power supply hot wire (12), and the other end of the lead wire head (22) is magnetically engaged with the lead wire member (411). A first magnet is provided at the end of the lead wire member (411) away from the first drive cylinder (412), and a second magnet is provided at the end of the lead wire head (22) that attracts the first magnet; The bottom of the threading head (22) is provided with at least two drive slots (221). The wire transfer device (5) includes a drive pin (51) corresponding to the drive slot (221), a second drive cylinder (52) for driving the drive pin (51) to rise and fall, and a third drive cylinder (53) for driving the second drive cylinder (52) to rotate. The wire transfer device (5) is located in the base plate (21), and the third drive cylinder (53) is provided with a transfer tray (54) for the second drive cylinder (52) to be installed. The base plate (21) is provided with a clearance through hole (211) for the drive pin (51) to slide through.

2. The nonwoven fabric heating element manufacturing process according to claim 1, characterized in that, In step four, after arranging the end section (123) of the heating wire (12) on a layer of non-woven fabric (11) in a specified direction, glue is sprayed onto the end section (123) and the non-woven fabric (11) near the end section (123). Then, the non-woven fabric (11) on top of the non-woven fabric (11) is flatly covered on the non-woven fabric (11) to fix the heating wire (12).

3. The nonwoven fabric heating element manufacturing process according to claim 2, characterized in that, When the upper layer of nonwoven fabric (11) of the end section (123) of the heating wire (12) covers the lower layer of nonwoven fabric (11), pressure is continuously applied to the upper and lower layers of nonwoven fabric (11) at the location where the adhesive is sprayed.

4. The nonwoven fabric heating element manufacturing process according to claim 1, characterized in that, In step three, the heating wire (12) is tightened every time it passes through a wire gap (14).

5. The nonwoven fabric heating element manufacturing process according to claim 1, characterized in that, In step three, before passing the heating wire (12) through the threading gap (14), the end of the starting section (122) of the heating wire (12) is connected to a threading pin, and the threading pin is passed through the threading gap (14).

6. The nonwoven fabric heating element manufacturing process according to claim 1, characterized in that, In step one, the two ends of the separator (13) are set to be arc-shaped.

7. The nonwoven fabric heating element manufacturing process according to claim 6, characterized in that, The adjacent two separators (13) are arranged alternately, and the two ends of the separators (13) are flush.

8. The nonwoven fabric heating element manufacturing process according to claim 7, characterized in that, In step four, the end segment (123) of the exposed heating wire (12) outside the wiring channel (15) abuts against one end of the separator strip (13) in a straight line direction.

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