A heating positioning device for a cigarette filter rod forming machine

Abstract

The present invention relates to a heating and positioning device for a cigarette filter rod forming machine, comprising a heating block, a paper guide block and a paper stop block. The heating block is fixedly mounted on the forming machine, and a vertical groove is provided in the middle, and a heat source mounting hole is provided at the bottom of the heating block; the paper guide block is arranged and installed in the groove, and one side of the paper guide block is close to the side wall of the groove, and the paper coil can pass through the other side of the paper guide block when heated; the paper stop block is arranged and installed on the side of the paper guide block through which the paper coil passes. The position of the paper guide block relative to the heating block can be adjusted, and the position of the paper stop block relative to the paper guide block can be adjusted, and the passing paper coil can be accurately positioned by adjustment. The present invention has a simple structure and low manufacturing cost. The groove mouth rods produced by the forming machine using the device have complete head and tail grooves, clear contours, and uniform groove positions, which solves the quality problems of disordered grooves and unstable groove shapes of the groove filter rods caused by uneven heating and inaccurate positioning of the paper coil.

Description

Technical Field

[0001] The invention relates to the field of accessories for cigarette filter rod forming machines, in particular to a heating positioning device for cigarette filter rod forming machines. Background Art

[0002] A high-combustion-efficiency cigarette with a corrugated inner filter rod has an outer layer of cigarette paper, a layer of corrugated paper wrapped inside the cigarette paper, and corrugated grooves formed on the inner circle of the cigarette paper, which increases the amount of fresh air inhaled, lowers the smoke temperature, and reduces the harm of smoke to the oral and nasal cavities.

[0003] Chinese patent application CN201220126901.1 discloses a grooved paper heating device and a groove forming device, such as Figure 4 As shown, the groove forming device includes an active roller, a passive roller, a paper positioner, a paper feed roller for fixing and transmitting grooved paper, and a grooved paper heating device; the grooved paper fed by the paper feed roller is fed into between the active roller and the passive roller through the paper positioner for groove roller shaping; the grooved paper heating device is arranged on one side of the paper positioner; the grooved paper heating device is a heat conduction module with a built-in heating tube and a platinum thermal resistor.

[0004] When the above device is used to produce grooved filter rods, it is found that when the paper coil is rolled into a grooved wrapped tow filter rod, it is very easy for the groove to collapse at the junction of the head and tail grooves and the filter rod slot position to be disordered, which seriously affects the product quality, greatly increases the defective rate, and causes certain waste; and the effect that the grooved filter rod should have cannot be achieved, which directly harms the interests of consumers; and the overall groove appearance is unclear, affecting the appearance quality of the end face of the cigarette filter. After testing and cause analysis, two problems were found. First, the paper positioner in the above device has a simple structure and cannot accurately locate the position of the grooved paper coil. During processing, the position of the grooved paper coil often shifts, resulting in the roller pressing the position not being accurate enough, resulting in the disorder of the grooved filter rod slot position; second, the paper coil is heated on one side when passing through the paper positioner, which makes the paper coil heated unevenly, resulting in the groove not being able to be better shaped when the grooved filter rod is formed. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a heating and positioning device for a cigarette filter rod forming machine, which improves the accuracy of coil paper positioning and heating uniformity by improving the heating and positioning components to ensure the quality of the processed filter rods, and solve the problems of overlap collapse of the filter rod grooves, disordered groove positions, affecting the tar reduction effect, and unclear overall groove appearance. The specific contents are as follows:

[0006] A heating and positioning device for a cigarette filter rod forming machine, comprising:

[0007] A heating block is fixedly mounted on the forming machine and is used to heat the coiled paper. A vertical groove is provided in the middle of the heating block, and a heat source installation hole is provided at the bottom of the heating block.

[0008] A paper guide block is arranged and installed in the groove, one side of the paper guide block is in close contact with the side wall of the groove, and the paper coil can pass through the other side of the paper guide block when heated; the paper guide block can move back and forth along the depth direction of the groove to adjust the position where the paper coil enters the roller; a folded edge is arranged on one side of the surface of the paper guide block through which the paper coil passes;

[0009] A paper stop block is provided with a paper stop block waist hole, and a threaded hole corresponding to the paper stop block waist hole is provided on the paper guide block. The paper stop block is installed on the surface of the paper guide block through which paper is coiled by screws passing through the paper stop block waist hole. An adjustment groove is provided on the side of the groove, and the paper stop block can move back and forth along the paper stop block waist hole; the paper stop block has an extended edge relative to the folded edge, and the extended edge, the folded edge and the surface of the paper guide block through which paper is coiled together form a channel for the paper to pass through, which can position the paper.

[0010] Furthermore, the paper guide block is provided with a through threaded through hole and a through hole along the depth direction of the groove, and a position adjustment mechanism is provided which passes through the through threaded through hole and can be rotatably connected to the bottom of the heating block groove, and a limiting bolt is also provided which passes through the through hole and is connected to the bottom of the heating block groove; the position adjustment mechanism can adjust the installation position of the paper guide block relative to the heating block along the direction of the threaded through hole, and then cooperate with the limiting bolt to fix the position of the paper guide block.

[0011] Furthermore, the position adjustment mechanism is a micrometer mechanism, including a coarse adjustment screw, a fine adjustment screw, and a connecting sleeve. After installation, the connecting block is fixedly bonded to the paper guide block; a transverse scale is provided on the connecting sleeve, and an annular scale is provided on the fine adjustment screw.

[0012] Furthermore, the paper guide block is provided with a paper guide block waist hole, a threaded hole is provided on the surface of the groove in contact with the paper guide block, an adjustment through hole is provided on the surface of the groove opposite to the threaded hole, the paper guide block is installed on the paper guide block by screws passing through the paper guide block waist hole, and the paper guide block can move back and forth along the paper guide block waist hole.

[0013] Furthermore, a plurality of grooves are provided on the side wall of the profile groove which is in close contact with the paper guide block along the depth direction of the profile groove, and a plurality of convex strips which are matched with the grooves are provided on one side of the paper guide block which is in close contact with the profile groove.

[0014] Furthermore, a plurality of grooves are provided on one side of the paper guide block in contact with the paper stop block along the depth direction of the profile groove, and a plurality of convex strips are provided on one side of the paper stop block in contact with the paper guide block to cooperate with the grooves; a scale bar is provided on the outer edge of the paper guide block, and a rectangular groove is provided on the paper stop block, through which the scale bar can be seen, so as to facilitate adjustment of the position of the paper stop block relative to the paper guide block.

[0015] Furthermore, the heating block is divided into two parts, left and right, along the groove; the left half is provided with a first arc surface and a second arc surface from top to bottom, and the right half is provided with a third arc surface and a fourth arc surface from top to bottom; the paper guide block includes a fifth arc surface on the left side of the top and a sixth arc surface on the right side of the top; the paper stop block includes a seventh arc surface on the right side of the top.

[0016] Furthermore, the first arc surface is a concentric arc of the active roller, and the radius of the arc surface is greater than the radius of the active roller; the first arc surface and the fifth arc surface form concentric arcs with the same radius.

[0017] Furthermore, the third arc surface is a concentric arc of the passive roller, and the arc surface radius is greater than the radius of the passive roller; the third arc surface, the sixth arc surface and the seventh arc surface form concentric arcs with the same radius.

[0018] Furthermore, the groove is cut symmetrically along the intersection of the first arc surface and the third arc surface.

[0019] The working principle of the present invention is as follows:

[0020] The heating block 1 is provided with a groove 16, the paper guide block 2 is installed in the groove 16, the paper stop block 3 is installed on the paper guide block 2, and the positions of the paper stop block 3 and the paper guide block 2 in the groove 16 can be independently adjusted along the depth direction of the groove 16. The extended edge 32 of the paper stop block 3, the folded edge 25 of the paper guide block 2 and the surface of the paper guide block 2 through which the paper coil 6 passes together form a passage through which the paper coil 6 passes, and the paper coil 6 enters the passage after passing through the paper feed roller, and the position of the passage is adjusted by adjusting the position of the paper stop block 3 and the paper guide block 2, thereby positioning the passing paper coil 6; the heating block 1 is heated by a heat source and then transferred to the paper guide block 2 and the paper stop block 3, and the paper coil 6 is heated when passing through the passage, and then the paper coil 6 reaches the active roller 5 and the passive roller 4 for embossing. The position of the paper guide block 2 can be precisely adjusted by the micrometer mechanism 27 to accurately position the paper roll 6. The grooves 7 and convex strips 8 on the heating block 1, the paper guide block 2, and the paper stop block 3 cooperate with each other to increase the contact area between them, better conduct heat and transfer, and make the paper roll 6 evenly heated. The structure of the folded edge 25 and the extended edge 32 can also conduct heat to heat the other side of the paper roll 6.

[0021] The present invention has the following beneficial effects compared with the prior art:

[0022] (1) The present invention has a simple structure and low manufacturing cost. It designs a paper coil conveying channel that can accurately adjust the position, so that the paper coil can be evenly heated while accurately positioning the conveying path. The corrugated or grooved nozzle rods produced by the forming machine of the device have complete head and tail grooves, clear contours, and uniform groove positions, which solves the quality problems caused by uneven heating and inaccurate positioning of the paper coil, resulting in disordered grooves and unstable groove shapes of the grooves, improves production quality, and reduces waste in the production process.

[0023] (ii) The position adjustment mechanism of the present invention utilizes the working principle of a micrometer, and can be used in combination to adjust the position of the paper reel passage very accurately, ensuring that the paper reel conveying position meets the requirements.

[0024] (III) In the present invention, the interconnections between the components cooperate with each other through grooves and convex strips, which increases the contact area and ensures faster and more uniform heat conduction, thereby improving the heating quality of the coiled paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the use status of the first embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0027] Figure 3 This is a front view of the first embodiment of the present invention;

[0028] Figure 4 It is a right side view of the first embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the heating block structure according to the first embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the heating block according to the first embodiment of the present invention from another viewing angle;

[0031] Figure 7 This is a schematic diagram of the structure of the paper guide block according to the first embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the paper stop block according to the first embodiment of the present invention;

[0033] Fig. 9 This is a schematic diagram of the installation structure of the paper guide block and the paper stop block according to the first embodiment of the present invention;

[0034] Fig.10 This is a schematic diagram of the micrometer mechanism described in the second embodiment of the present invention;

[0035] Fig.11It is a schematic diagram of the overall structure of Embodiment 2 and Embodiment 3 of the present invention;

[0036] Fig.12 This is a schematic diagram of the overall structure of another viewing angle of Embodiment 2 and Embodiment 3 of the present invention;

[0037] Fig.13 It is a right side cross-sectional view of the second embodiment and the third embodiment of the present invention;

[0038] Fig.14 This is a schematic diagram of the heating block structure according to the third embodiment of the present invention;

[0039] Fig.15 This is a schematic diagram of the structure of the paper guide block according to the third embodiment of the present invention;

[0040] Fig.16 This is a schematic diagram of the structure of the paper stop block according to the third embodiment of the present invention;

[0041] Fig.17 This is a schematic diagram of the installation structure of the paper guide block and the paper stop block according to the third embodiment of the present invention;

[0042] Fig.18 This is a schematic diagram of the end face of a qualified filter rod;

[0043] Fig.19 This is a schematic diagram of the end face of a defective filter rod;

[0044] In the figure:

[0045] 1 - heating block, 11 - first arc surface, 12 - second arc surface, 13 - third arc surface, 14 - fourth arc surface

[0046] Surface, 15-adjustment groove, 16-shaped groove, 17-adjustment through hole, 18-heat source installation hole; 2-paper guide block, 21-fifth arc surface, 22-limiting bolt, 23-adjustment screw, 24-sixth arc

[0047] Surface, 25—folded edge, 26—waist hole of paper guide block, 27—micrometer mechanism, 271—coarse adjustment screw, 272—fine adjustment screw, 273—annular scale, 274—lateral scale, 28—scale bar;

[0048] 3—paper stopper, 31—seventh arc surface, 32—extended edge, 33—waist hole of paper stopper, 34—rectangular groove; 4—passive roller; 5—active roller; 6—paper coil; 7—groove; 8—convex strip. DETAILED DESCRIPTION

[0049] In order to make the technical means, creative features and objectives of the present invention easy to understand, the technical solution of the invention is further explained below in combination with one embodiment and specific implementation method of a heating and positioning device for a cigarette filter rod forming machine provided by the present invention.

[0050] The specific embodiments given for the invention are as follows:

[0051] Embodiment 1: Figure 1-9 As shown, a heating positioning device for a cigarette filter rod forming machine includes a heating block 1, a paper guide block 2, and a paper stop block 3. The heating block 1 is provided with three heating block mounting holes, and the heating block is fixedly mounted on the forming machine through the heating block mounting holes, and is used to heat the coil paper 6. A vertical groove 16 is provided in the middle of the heating block 1, and the heating block 1 is divided into left and right parts along the groove 16. The left half is provided with a first arc surface 11 and a second arc surface 12 from top to bottom, and the right half is provided with a third arc surface 13 and a fourth arc surface 14 from top to bottom; the groove 16 is symmetrically cut along the intersection of the first arc surface 11 and the third arc surface 13. A heat source mounting hole 18 is provided at the bottom of the heating block 1.

[0052] The paper guide block 2 is arranged and installed in the groove 16, with one side of the paper guide block 2 close to the side wall of the groove 16, and the paper coil 6 can pass through the other side of the paper guide block 2 when heated; the paper guide block 2 can move back and forth along the depth direction of the groove 16 to adjust the position of the paper coil 6 entering the roller; a folding edge 25 is arranged on one side of the surface of the paper guide block 2 through which the paper coil 6 passes; the paper guide block 2 includes a fifth curved surface 21 on the top left and a sixth curved surface 24 on the top right. The paper guide block 2 is provided with three paper guide block waist holes 26, with a length and a width of 12 mm and 5.5 mm. A threaded hole is provided on the side of the groove 16 that contacts the paper guide block 2, and an adjustment through hole 17 is provided on the side of the groove 16 that is opposite to the threaded hole. The paper guide block 2 is installed on the paper guide block 2 by screws passing through the paper guide block waist holes 26, and the paper guide block 2 can move back and forth along the paper guide block waist holes 26.

[0053] The paper stopper 3 is provided with three paper stopper waist holes 33, and the length and width of the paper stopper waist holes 33 are 8mm and 3.4mm respectively. The paper guide block 2 is provided with threaded holes corresponding to the paper stopper waist holes 33. The paper stopper 3 is installed on the surface of the paper guide block 2 through which the paper coil 6 passes by passing screws through the paper stopper waist holes 33. An adjustment groove 15 is provided on the side of the groove 16, and the screw can be rotated through the adjustment groove 15, so that the paper stopper 3 can move back and forth along the paper stopper waist holes 33. The paper stopper 3 includes a seventh arc surface 31 on the right side of the top. The paper stopper 3 has an extended edge 32 relative to the folded edge 25. The extended edge 32, the folded edge 25 and the surface of the paper guide block 2 through which the paper coil 6 passes together form a channel through which the paper coil 6 passes, and the channel can position the paper coil 6.

[0054] The paper guide block 2 is provided with two through threaded holes and two through holes along the depth direction of the groove 16, and a position adjustment mechanism is provided to be rotatably connected to the bottom of the groove 16 of the heating block 1 after passing through the through threaded holes, and a limit bolt 22 is provided to pass through the through hole and be connected to the bottom of the groove 16 of the heating block 1. The position adjustment mechanism can adjust the installation position of the paper guide block 2 relative to the heating block 1 along the direction of the threaded holes, and then cooperate with the limit bolt 22 to fix the position of the paper guide block 2. The adjustment mechanism is an adjustment screw 23.

[0055] The first arc surface 11 is a concentric arc of the active roller 5, and the radius of the arc surface is greater than the radius of the active roller 5; the first arc surface 11 and the fifth arc surface 21 form concentric arcs with the same radius.

[0056] The third arc surface 13 is a concentric arc of the passive roller 4, and the arc surface radius is greater than the radius of the passive roller 4; the third arc surface 13, the sixth arc surface 24 and the seventh arc surface 31 form concentric arcs with the same radius.

[0057] The overall length, width and height of the heating block 1 are 165mm, 35mm and 140mm respectively. The radius of the first arc surface 11 is 51.5mm, the radius of the second arc surface 12 is 80mm, the radius of the third arc surface 13 is 51.5mm, the radius of the fourth arc surface 14 is 15mm, and the width and depth of the groove 16 are 19mm and 30mm respectively; the radius of the fifth arc surface 21 is 51.5mm, the radius of the sixth arc surface 24 is 51.5mm, the depth and width of the "concave" groove formed by the folding edge 25 are 3.25mm and 2mm; the radius of the seventh arc surface 31 is 51.5mm, and the depth and width of the "concave" groove formed by the extended edge 32 are 3mm and 2mm.

[0058] When in use, the heating block 1 is installed below the active roller 5 and the passive roller 4, the paper guide block 2 is installed on the side of the groove 16 of the heating block 1 by screws, the paper stop block 3 is installed on the paper guide block 2 by screws, and the paper roll 6 passes through the channel formed by the paper feed roller, the paper guide block 2 and the paper stop block 3 to reach the active roller 5 and the passive roller 4. Loosen the fixing screws between the paper stopper block 3 and the paper guide block 2, adjust the relative position of the paper stopper block 3 and the paper guide block 2 along the waist hole 33 of the paper stopper block, so that the paper coil 6 is in the channel formed by the paper guide block 2 and the paper stopper block 3, and the width of the channel is equal to the width of the paper coil 6 plus 0.1mm; loosen the fixing screws between the paper guide block 2 and the heating block 1, roughly adjust the relative position between the paper guide block 2 and the heating block 1, so that the paper coil 6 is accurately located between the active roller 5 and the passive roller 4, and then loosen the side limit bolts 22 of the paper guide block 2, and adjust the side adjustment screws 23 of the paper guide block 2 to finely adjust the position of the paper guide block 2 relative to the heating block 1, so that the paper coil 6 is accurately located between the active roller 5 and the passive roller 4, and after the position adjustment and positioning, tighten the limit bolts 22 and the adjustment screws 23. At the same time, the paper coil 6 is in the groove 16 in the middle of the heating block 1, and the two sides of the paper coil 6 are evenly heated, and the groove shape is more stable.

[0059] Embodiment 2: Figure 10-13 As shown, the position adjustment mechanism in the first embodiment is a micrometer mechanism 27, which includes a coarse adjustment screw 271, a fine adjustment screw 272, and a connecting sleeve. After installation, the connecting block is fixedly bonded to the paper guide block 2; a transverse scale 274 is provided on the connecting sleeve, and an annular scale 273 is provided on the fine adjustment screw 272. A scale bar 28 is provided on the outer edge of the paper guide block 2, and a rectangular groove 34 is provided on the paper stopper 3. The length, width, and height of the rectangular groove 34 are 15mm, 4mm, and 3mm. The scale bar 28 can be seen through the rectangular groove 34, which is convenient for adjusting the position of the paper stopper 3 relative to the paper guide block 2. After installing this micrometer mechanism 27, because it can be roughly adjusted and finely adjusted, it is no longer necessary to open the paper guide block waist hole 26 on the paper guide block 2, and at the same time, it is no longer necessary to open a threaded hole corresponding to the paper guide block waist hole 26 and an adjustment through hole 17 for adjustment on the groove 16, which further increases the contact area between the paper guide block 2 and the groove 16, increases heat conduction, and ensures that the paper coil 6 is heated evenly.

[0060] When in use, first loosen the limit bolt 22, preliminarily adjust the position of the paper guide block 2 through the coarse adjustment screw 271, read the value through the horizontal scale 274, then turn the fine adjustment screw 272, read the value through the annular scale 273, further adjust the position of the paper guide block 2, and then tighten the limit bolt 22 to fix the position of the paper guide block 2 relative to the heating block 1. When adjusting the position of the paper stop block 3 relative to the paper guide block 2, the scale bar 28 on the paper guide block 2 can be seen through the rectangular groove 34 provided on the paper stop block 3, so as to determine the relative position of the paper guide block 2 and the paper stop block 3.

[0061] Embodiment 3: Fig.10 , 11 , 14-17, based on the second embodiment, the difference from the first embodiment is that a plurality of grooves 7 are provided on the side wall where the groove 16 and the paper guide block 2 are in close contact with each other along the depth direction of the groove 16, and a plurality of convex strips 8 are provided on the side where the paper guide block 2 and the groove 16 are in close contact with each other and are installed in cooperation with the grooves 7. A plurality of grooves 7 are provided on the side where the paper guide block 2 and the paper stopper block 3 are in contact with each other along the depth direction of the groove 16, and a plurality of convex strips 8 are provided on the side where the paper stopper block 3 and the paper guide block 2 are in contact with each other and are installed in cooperation with the grooves 7. The cooperation between the convex strips 8 and the grooves 7 can increase the contact area between them, and ensure uniform and rapid heat conduction during heating.

[0062] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A heating and positioning device for a cigarette filter rod forming machine, characterized in that: include: A heating block (1) is fixedly mounted on the forming machine and is used to heat the coiled paper (6); a vertical groove (16) is provided in the middle of the heating block (1); and a heat source mounting hole (18) is provided at the bottom of the heating block (1); A paper guide block (2) is arranged and installed in the groove (16), one side of the paper guide block (2) is closely attached to the side wall of the groove (16), and the paper coil (6) can pass through the other side of the paper guide block (2) when heated; the paper guide block (2) can move back and forth along the depth direction of the groove (16) to adjust the position of the paper coil (6) entering the roller; a folded edge (25) is provided on one side of the surface of the paper guide block (2) through which the paper coil (6) passes; The paper stopper (3) is provided with a paper stopper waist hole (33), the paper guide block (2) is provided with a threaded hole corresponding to the paper stopper waist hole (33), the paper stopper (3) is installed on the surface of the paper guide block (2) through which the paper (6) passes by means of a screw passing through the paper stopper waist hole (33), the side of the groove (16) is provided with an adjustment groove (15), and the paper stopper (3) can move back and forth along the paper stopper waist hole (33); the paper stopper (3) has an extended edge (32) relative to the folded edge (25), the extended edge (32), the folded edge (25) and the surface of the paper guide block (2) through which the paper (6) passes together form a passage for the paper (6) to pass, and can position the paper (6); The paper guide block (2) is provided with a through threaded through hole and a through hole along the depth direction of the groove (16); a position adjustment mechanism is provided which passes through the through threaded through hole and is rotatably connected to the bottom of the groove (16) of the heating block (1); a limit bolt (22) is provided which passes through the through hole and is connected to the bottom of the groove (16) of the heating block (1); the position adjustment mechanism can adjust the installation position of the paper guide block (2) relative to the heating block (1) along the direction in which the threaded through hole is opened, and then cooperates with the limit bolt (22) to fix the position of the paper guide block (2); The paper guide block (2) is provided with a paper guide block waist hole (26), a threaded hole is provided on a surface of the groove (16) in contact with the paper guide block (2), an adjustment through hole (17) is provided on a surface of the groove (16) opposite to the threaded hole, the paper guide block (2) is mounted on the paper guide block (2) by screws passing through the paper guide block waist hole (26), and the paper guide block (2) can move back and forth along the paper guide block waist hole (26); The heating block (1) is divided into two parts, left and right, along the groove (16); the left half is provided with a first curved surface (11) and a second curved surface (12) from top to bottom, and the right half is provided with a third curved surface (13) and a fourth curved surface (14) from top to bottom; the paper guide block (2) includes a fifth curved surface (21) on the left side of the top and a sixth curved surface (24) on the right side of the top; and the paper stop block (3) includes a seventh curved surface (31) on the right side of the top.

2. A heating and positioning device for a cigarette filter rod forming machine according to claim 1, characterized in that: The position adjustment mechanism is a micrometer mechanism (27), comprising a coarse adjustment screw (271), a fine adjustment screw (272), and a connecting sleeve. After installation, the connecting sleeve is fixedly bonded to the paper guide block (2); a transverse scale (274) is provided on the connecting sleeve, and an annular scale (273) is provided on the fine adjustment screw (272).

3. A heating and positioning device for a cigarette filter rod forming machine according to claim 1, characterized in that: A plurality of grooves (7) are provided on the side wall of the groove (16) and the paper guide block (2) in close contact with each other along the depth direction of the groove (16); and a plurality of convex strips (8) are provided on one side of the paper guide block (2) and the groove (16) in close contact with each other, and are mounted in cooperation with the grooves (7).

4. A heating and positioning device for a cigarette filter rod forming machine as claimed in claim 3, characterized in that: A plurality of grooves (7) are provided on one side of the paper guide block (2) in contact with the paper stop block (3) in the depth direction of the profile groove (16); a plurality of convex strips (8) are provided on one side of the paper stop block (3) in contact with the paper guide block (2) and are mounted in cooperation with the grooves (7); a scale bar (28) is provided on the outer edge of the paper guide block (2); a rectangular groove (34) is provided on the paper stop block (3), and the scale bar (28) can be seen through the rectangular groove (34), so as to facilitate adjustment of the position of the paper stop block (3) relative to the paper guide block (2).

5. A heating and positioning device for a cigarette filter rod forming machine according to claim 1, characterized in that: The first arc surface (11) is a concentric arc of the active roller (5), and the radius of the arc surface is greater than the radius of the active roller (5); the first arc surface (11) and the fifth arc surface (21) form concentric arcs with the same radius.

6. A heating and positioning device for a cigarette filter rod forming machine according to claim 1, characterized in that: The third arc surface (13) is a concentric arc of the passive roller (4), and the radius of the arc surface is greater than the radius of the passive roller (4); the third arc surface (13), the sixth arc surface (24) and the seventh arc surface (31) form concentric arcs with the same radius.

7. A heating and positioning device for a cigarette filter rod forming machine according to claim 1, characterized in that: The profile groove (16) is cut symmetrically along the intersection of the first curved surface (11) and the third curved surface (13).

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