Hot box door locking mechanism, hot box and false twist texturing machine

Abstract

The present application relates to the technical field of hot box, and provides a hot box door locking mechanism, a hot box and a false twist texturing machine.The hot box door locking mechanism comprises at least one pressing mechanism, a transmission shaft for driving the pressing mechanism to rotate, and a pressing handle for driving the transmission shaft to rotate.The pressing mechanism comprises a rotating pressing piece and a retaining assembly.The transmission shaft penetrates through the retaining assembly and is connected with the rotating pressing piece.The pressing handle rotates to form a first shaft.During the process of driving the rotating pressing piece to rotate by the transmission shaft, the rotating pressing piece and the hot box door change from being separated from each other to being in contact with each other, so as to press the hot box door to rotate to a closed state surface.The present application drives at least one pressing mechanism by the pressing handle to apply a pressing force to the edge area of the hot box door, so as to press the hot box door to rotate to a closed state surface, thereby solving the problems of heat loss and high energy consumption caused by the fact that the hot box door cannot be effectively closed to heat the cavity.

Description

Technical Field

[0001] This invention relates to the field of hot box technology, and in particular to a hot box door locking mechanism, a hot box, and a false twisting deformation machine. Background Technology

[0002] A false-twist texturing machine is a chemical fiber processing device that processes pre-oriented or drawn yarns (hereinafter usually "raw yarns") such as polyester and nylon into elastic yarns through a false-twist texturing process. Before entering the false-twist device, the raw yarns need to be heated in a hot box. The false-twist texturing machine contains multiple hot boxes, each forming multiple strip-shaped openings with heat rails at the bottom. The hot box doors are pivotally connected to the box body via hinges, and each hot box door has a spring at one end of the top of the hot box, located at one end of the strip-shaped opening. A drive rod is located at the top end of the hot box to drive the hot box door to rotate. The drive rod is manually rotated to open or close the strip-shaped opening.

[0003] When the spring applies a preload to the hot chamber door to fully close the slotted opening, this preload is only applied to one end of the door along its length. This results in inconsistent closing force between the door and the chamber body, leading to heat loss at the door-to-chamber junction and ultimately poor insulation and high energy consumption. However, if a latch or rotating handle is installed in the middle of the door's length to apply preload pressure, the problem becomes more apparent. Since the hot chamber of a false-twist texturing machine is typically located above the work aisle, and the height of the middle section of the door is much greater than what the operator can reach using the trolley, this preload can be mitigated. False-twist texturing machines typically contain hundreds of heating chambers. If the opening and closing of the heating chamber doors are performed using a trolley with locking mechanisms such as latches or rotary handles, the operation becomes extremely cumbersome and inconvenient. This problem is particularly pronounced in V-type false-twist texturing machines. Furthermore, the clamping stroke created by latches or rotary handles during the clamping process is too short, resulting in insufficient pre-tightening pressure on the heating chamber doors, and this pre-tightening pressure is unevenly distributed along the length of the heating chamber door. Gaps easily form between the heating chamber door and the front cover in areas far from the latches or rotary handles, leading to heat loss.

[0004] Furthermore, existing technologies such as Chinese utility model patents (CN210657303U and CN210657302U) describe heating chamber doors in which a rigid insulation structure is installed on the side near the heating rail. However, if the manufacturing precision of the rigid insulation structure has slight tolerances, it may result in the inability to effectively close the heating chamber, or heat loss due to gaps between the heating chamber door and the side wall of the heating chamber. Since the manufacturing precision of the heating chamber door and the chamber body is objectively unavoidable, using high-precision machining processes and equipment (e.g., a five-axis machining center) will inevitably lead to excessively high manufacturing costs for the heating chamber door and the heating chamber containing the door. In view of this, it is necessary to improve the existing technology for locking the heating chamber door after it is closed in the heating chamber of a false-twist deformation machine to solve the above problems.

[0005] It should be noted that the above description of the background technology is only for the purpose of clearly and completely explaining the technical solutions of this application and facilitating the understanding of those skilled in the art. It should not be assumed that these solutions are known to those skilled in the art simply because they have been described in the background technology section of this application. The prior art described in the background technology is independent of each other, and there is no direct or implicit motivation to combine them. Summary of the Invention

[0006] The purpose of this invention is to disclose a hot box door locking mechanism, a hot box, and a false twisting deformation machine, so as to solve the problem that the hot box door cannot effectively close the heating chamber, and to achieve a relatively uniform pre-tightening pressure on the box body when the hot box door is in the closed state, so as to solve the technical problems of heat loss and excessive energy consumption in the hot box in the prior art, and to improve the ease of opening or closing the strip opening of the hot box door.

[0007] To achieve one of the above objectives, an embodiment of the present invention provides a hot box door locking mechanism, which is disposed on a front cover plate of a hot box forming a strip-shaped opening. The hot box is provided with a hot box door for movably opening and closing the strip-shaped opening and is pivotally connected to the hot box.

[0008] The aforementioned hot box door locking mechanism includes: at least one pressing mechanism, a transmission shaft for driving the pressing mechanism to rotate, and a pressing handle for driving the transmission shaft to rotate;

[0009] The aforementioned pressing mechanism includes a rotating pressing member and a retaining assembly. The aforementioned transmission shaft passes through the aforementioned retaining assembly and connects to the aforementioned rotating pressing member. The aforementioned rotating pressing member rotates to form a first shaft. During the process of the aforementioned transmission shaft driving the aforementioned rotating pressing member to rotate, the aforementioned rotating pressing member and the hot box door change from being separated to being in contact with each other, so as to press the aforementioned hot box door to rotate to the closed state surface.

[0010] Based on the same technical concept, embodiments of the present invention also provide a heating box, comprising:

[0011] The box body, the insulation structure filled inside the box body, the insulation structure being configured to have a plurality of insulation cavities extending along the yarn conveying path, the box body including a front cover plate forming a plurality of strip openings that movably expose the insulation cavities, and a hot box door.

[0012] The aforementioned heat insulation cavity includes a heat insulation cavity near the aforementioned front cover plate and a heating cavity located at the bottom of the aforementioned heat insulation cavity. A heat rail is provided at the bottom of the aforementioned heating cavity. The aforementioned hot box door is pivotally connected to the aforementioned front cover plate to movably open and close the aforementioned strip opening. The aforementioned hot box door is provided with a flexible heat insulation strip for movably opening and closing the aforementioned strip opening, a hot box door rotation mechanism, and a hot box door locking mechanism as described in the aforementioned invention. The aforementioned hot box door rotation mechanism drives the aforementioned hot box door to rotate to form a second axis. The aforementioned first axis and the aforementioned second axis are arranged parallel to each other and are respectively formed on both sides of the aforementioned strip opening.

[0013] Based on the same technical concept, embodiments of the present invention also provide a false-twist texturing machine, comprising:

[0014] A main frame, a processing group disposed on the main frame, and an operating channel formed on the inner side of the main frame; the processing group includes: a heating box, a cooling device, a false twisting device, a conveying device and a winding device as described in the aforementioned invention, wherein the heating box and the cooling device are both inclinedly disposed above the operating channel.

[0015] Compared with the prior art, the beneficial effects of the embodiments of the present invention include some or all of the following:

[0016] After the hot box door is rotated and the strip opening is initially closed, the holding handle drives at least one of the rotating holding components of the holding mechanism to apply a holding force perpendicular to the working surface to the edge area of ​​the hot box door, including at least the edge. This forces the hot box door to rotate further to the closed state, achieving effective closure of the strip opening and making the degree of closure more consistent. This solves the technical problem of heat loss and high energy consumption caused by the inability of the hot box door to effectively close the heating cavity along its length extension direction. At the same time, it also makes it easier to perform opening and closing operations on the hot box door. Attached Figure Description

[0017] Figure 1 A schematic diagram of a heating box provided according to an embodiment of the present invention;

[0018] Figure 2 A side view of a hot box, including a hot box door locking mechanism, configured in a false twisting machine in an exemplary usage state;

[0019] Figure 3 for Figure 1 A magnified view of the middle arrow A;

[0020] Figure 4 for Figure 1 A magnified view of the middle arrow B;

[0021] Figure 5 for Figure 2 A magnified view of the middle arrow C;

[0022] Figure 6 for Figure 2 A magnified view of the middle arrow D;

[0023] Figure 7 This is a schematic diagram of the hot box door in an open and closed state according to an embodiment of the present invention, with the eccentric pressure roller forming as shown. Figures 16 to 20 The two extreme positions correspond to those in the embodiments;

[0024] Figure 8 This is a partial cross-sectional view of a hot box door in an open state, according to an embodiment of the present invention.

[0025] Figure 9 This is a partial top view of the hot box door;

[0026] Figure 10 For along Figure 9 A cross-sectional view along the JJ direction;

[0027] Figure 11 This is a side view of the first endplate assembly;

[0028] Figure 12 This is a top view of the first endplate assembly;

[0029] Figure 13 This is a partial front view of the hot box door;

[0030] Figure 14 Top view of the mounting base and flexible thermal insulation strip after installation;

[0031] Figure 15 A cross-sectional view of the hot box with the door closed;

[0032] Figure 16 This is a schematic diagram of the holding mechanism in the released state of the hot box door locking mechanism provided in an embodiment of the present invention;

[0033] Figure 17 This is a schematic diagram showing the transition state between the release state and the holding state of the pressing mechanism in the hot box door locking mechanism provided in an embodiment of the present invention;

[0034] Figure 18 This is a schematic diagram showing that, in one embodiment, the maximum rotation radius formed by the fourth transition section during the rotation of the eccentric pressure roller is less than the shortest distance T1 formed by the edge of the hot box door near the hot box door locking mechanism and the first axis when the hot box door closes the strip opening;

[0035] Figure 19 This is a schematic diagram of the pressing mechanism in the pressing state of the hot box door locking mechanism provided in an embodiment of the present invention;

[0036] Figure 20 This is a schematic diagram of an eccentric pressure roller forming an avoidance notch on its outer edge in a hot box door locking mechanism according to an embodiment of the present invention, wherein the avoidance notch sequentially forms a first transition section, a pressing section, a second transition section, a third transition section and a fourth transition section;

[0037] Figure 21 A schematic diagram of the holding mechanism in the hot box door locking mechanism in the released state according to another embodiment of the present invention;

[0038] Figure 22 A schematic diagram of the transition state between the release state and the holding state in the hot box door locking mechanism provided in another embodiment of the present invention;

[0039] Figure 23 This is a schematic diagram of another embodiment where the minimum radius of rotation of the pressing section during the rotation of the eccentric pressure roller is less than the shortest distance T2 formed by the edge of the hot box door near the hot box door locking mechanism and the first axis when the hot box door closes the strip opening;

[0040] Figure 24 This is a schematic diagram of the holding mechanism in the holding state of the hot box door locking mechanism provided in another embodiment of the present invention;

[0041] Figure 25 This is a schematic diagram of an eccentric pressure roller forming an avoidance notch on its outer edge in a hot box door locking mechanism provided in another embodiment of the present invention, wherein the avoidance notch sequentially forms a first transition section and a pressing section;

[0042] Figure 26 This is a schematic diagram showing that the outer edge of the eccentric pressure roller in the hot box door locking mechanism of another embodiment of the present invention forms an avoidance notch, and the avoidance notch is formed only by the pressing section;

[0043] Figure 27 A schematic diagram showing an avoidance notch formed on the outer edge of the eccentric pressure roller in a hot box door locking mechanism provided in another embodiment of the present invention;

[0044] Figure 28 A schematic diagram showing the switching between a release state and a holding state of a hot box door locking mechanism provided in another embodiment of the present invention;

[0045] Figure 29 This is a schematic diagram showing the switching between a release state and a holding state of a hot box door locking mechanism provided in another embodiment of the present invention;

[0046] Figure 30A schematic diagram of a false-twist texturing machine provided in one embodiment of the present invention;

[0047] Figure 31 A schematic diagram of a V-type false twist texturing machine provided in another embodiment of the present invention;

[0048] Figure 32 This is a schematic diagram of an M-type false twisting texturing machine provided in another embodiment of the present invention. Detailed Implementation

[0049] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent changes or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0050] In summary, the door locking mechanism of the heat box in various embodiments of this application rotates the heat box door 200, which has already rotated and closed the strip opening 422, through the pressing mechanism included in the door locking mechanism. The pressing mechanism applies a pressing force f3 to the heat box door 200, forcing it to rotate to the closed state surface 220. This effectively closes the heat box door 200 along its length with the strip opening 422, preventing gaps between the heat box door 200 and the front cover plate 201, thus avoiding heat loss and improving the heat insulation performance of the heat box. The heat box containing one or more door locking mechanisms is a deformable heat box (hereinafter referred to as "heat box" or "(deformable) heat box") used for heating yarn. The closed state surface 220 referred to in various embodiments of this application does not require the surface of the heat box door 200 to be absolutely parallel to the surface of the front cover plate 201. The closed state surface 220 represents an ideal closed state configuration. When the hot box door 200 rotates to the closed state surface 220, the flexible heat insulation strip 243 can fill or partially fill the heat insulation cavity 401, concentrating the heat generated by the heat rail 403 into the heating cavity 402. Therefore, the closed state surface 220 can also form a certain angle with the surface of the front cover 201, but it is generally considered that the aforementioned angle is small, for example, 1°, 2°, or 3°. The embodiments of this application do not specifically limit the aforementioned angle.

[0051] The rotating pressing member in each embodiment of the present application can be an eccentric rotating pressing block or a symmetric rotating pressing block; the eccentric rotating pressing block includes an eccentric pressing wheel or an eccentric pressing bar, and the symmetric rotating pressing block includes various structures with a cross-section of a rectangle, an ellipse or other various centrally symmetric structures, and can form a lateral rotation offset during the rotation process. Among them, the lateral rotation offset refers to the rotation contour that can at least cover the edge 223 when the symmetric rotating pressing block rotates along the first axis 2 towards the side of the hot box door 200. For example, the rotation contour 270 or the rotation contour 272 of the rotating pressing member in subsequent embodiments.

[0052] The hot box door locking mechanism is arranged on the front cover plate 201 of the hot box 1000 forming a strip-shaped opening 422. The hot box 1000 is provided with a hot box door 200 that can be actively opened and closed for the strip-shaped opening 422 and is pivotally connected to the hot box 1000. The hot box door locking mechanism includes: at least one pressing mechanism 100, a transmission shaft 300 for driving the pressing mechanism 100 to rotate, and a pressing handle 21 for driving the transmission shaft 300 to rotate. The pressing mechanism 100 includes a rotating pressing member and a holding component. The transmission shaft 300 passes through the holding component and is connected to the rotating pressing member. The rotating pressing member rotates under the drive of the transmission shaft 300 to form a first axis 2, and the pivot axis formed during the rotation of the transmission shaft 300 coincides with the first axis 2. During the rotation of the transmission shaft 300 driving the rotating pressing member (for example, the eccentric pressing wheel 202, the eccentric pressing bar 212 or the symmetric rotating pressing bar 232), the rotating pressing member and the hot box door 200 change from being separated from each other to being in contact with each other, so as to press the hot box door 200 to rotate to the closed state surface 220. The aforementioned eccentric pressing wheel 202, eccentric pressing bar 212 or symmetric rotating pressing bar 232 are all subordinate concepts of the rotating pressing member, and can form a lateral rotation offset during the rotation along the first axis 2, so as to cover the edge 223 by any one of the aforementioned rotating pressing members or cover the edge 223 and the edge area 222 including the edge 223 at the same time, thereby pressing the hot box door 200 to rotate to the closed state surface 220.

[0053] See Figures 1 to 20 A corresponding embodiment of a hot box door locking mechanism. In this embodiment, the rotating pressing member is an eccentric rotating pressing block, and more specifically, an eccentric pressing wheel 202.

[0054] In this embodiment, the hot box door locking mechanism is arranged on the front cover plate 201 of the hot box 1000 forming a strip-shaped opening 422. The hot box 1000 is provided with a hot box door 200 that can be actively opened and closed for the strip-shaped opening 422 and is pivotally connected to the hot box 1000 through a hinge 2020. Exemplarily, the hot box 1000 forms six hot box doors 200, and a hot rail 403 for heating yarn is arranged at the bottom of each hot box door 200. Figure 1 A schematic diagram of the hot box door 200 closing the strip-shaped opening 422. As Figure 8 As shown, the heating rail 403 can form yarn paths 423 and 433 for heating yarns, so as to simultaneously heat two yarns continuously fed into the heating box 1000. The heating box door locking mechanism includes: at least one holding mechanism 100, a drive shaft 300 for driving the holding mechanism 100 to rotate, and a holding handle 21 for driving the drive shaft 300 to rotate, the holding handle 21 extending through one end of the strip opening 422. The holding mechanism 100 includes an eccentric pressure roller 202 and a holding assembly, the outer edge of the eccentric pressure roller 202 forming a holding section 130, the drive shaft 300 passing through the holding assembly and connected to the eccentric pressure roller 202, and the closed state surface 220 being the plane formed when the heating box door 200 closes the strip opening 422. Figure 1 Only one set of holding handles 21 and flip handles 11 is shown as an example. For a heat box 1000 containing six heat box doors 200, six sets of holding handles 21 and flip handles 11 can be provided at the second end plate 50 to perform opening and closing operations on each heat box door 200 respectively. The first end plate 10 is provided with mounting posts 170 and 180 at the end of each strip opening 422 for mounting a yarn guide (not shown). Two mounting posts fix one yarn guide to facilitate easier yarn feeding into the heat box 1000. For easy gripping and rotation, the end of the holding handle 21 forms a gripping part 2101, and the end of the flip handle 11 forms another gripping part 1101.

[0055] It should be noted that the hot box door locking mechanism may include one holding mechanism 100 and may only have one drive shaft 300; alternatively, the hot box door locking mechanism may also include two mutually separated holding mechanisms 100, in which case two drive shafts 300 may be provided, namely, drive shaft 301 and drive shaft 302 arranged coaxially and axially separated. Preferably, two mutually separated drive shafts 300 arranged coaxially and relatively evenly along one side of the strip opening 422 are used, and the use of three or more holding mechanisms 100 and drive shafts 300 is not excluded. Preferably, drive shaft 301 and drive shaft 302 may also be a continuous integral assembly. It should be noted that, due to the limitations of the attached drawings, Figure 1 The lengths of the medium-pressure handle 21 and the flip handle 11 are relative to each other. Figure 1 The length of the heating box 100 does not constitute a limiting interpretation of the technical solutions contained in the embodiments of this application. At the same time, two separate pressing mechanisms 100 can be connected to each other along the direction of the first axis 2 and regarded as a whole pressing mechanism 100 to increase the force-bearing area of ​​the pressing mechanism 100 on the edge 223 and the edge region 222 containing the edge 223.

[0056] like Figure 4 and Figure 5As shown, in one embodiment, the retaining assembly includes a first retaining assembly 204 and a second retaining assembly 205, which together retain the eccentric pressure roller 202, allowing the eccentric pressure roller 202 to rotate along the rotation surface 160. A rectangular metal plate 203 is disposed inside the front cover plate 201, fitting against the back of the front cover plate 201. The rectangular metal plate 203 serves as a reinforcing structural member to ensure the stability and structural strength of the first retaining assembly 204 and the second retaining assembly 205 mounted on the front cover plate 201. The first retaining assembly 204 includes a base 2041 fitted against the front cover plate 201, a vertical plate 2042 bent vertically upward from the base 2041, and a second positioning sleeve 2043 coaxially disposed with the first shaft 2. The base 2041 has two through holes 2044, and screws or other locking devices are used to pass through the base 2041 and connect to the rectangular metal plate 203. The second retaining assembly 205 includes a base 2051 that fits against the front cover plate 201, a vertical plate 2052 bent vertically upward from the base 2051, and a third positioning sleeve 2053 coaxially arranged with the first shaft 2. The base 2051 has two through holes 2054, and screws or other locking devices are used to pass through the base 2051 and connect it to the rectangular metal plate 203. The drive shaft 300 sequentially passes through the second positioning sleeve 2043, the eccentric pressure roller 202, and the third positioning sleeve 2053. The eccentric pressure roller 202 has a pin hole 214 on its arc-shaped side edge where no clearance notch 230 is formed. A positioning bolt 215 extends into the pin hole 214 and is fixed to the drive shaft 300. This allows the eccentric pressure roller 202 to rotate along the rotation surface 160 via the rotation of the drive shaft 300. Figure 1 and Figure 5 As shown, the end of the drive shaft 300 near the first end plate 10 is held by another set of holding components consisting of a first holding component 204 and a second holding component 205. Figure 5 The retaining components and Figure 1 Compared to the other retaining component included in the magnified view indicated by the middle arrow B, the difference lies in... Figure 5 The end of the drive shaft 301 shown is fitted with a locking cap 206. The locking cap 206 has a pin hole 207, and is fixed to the drive shaft 301 by screwing in a bolt or other locking device into the pin hole 207, preventing the drive shaft 301 from detaching from the second positioning sleeve 2043. The first retaining component 204 and the second retaining component 205 that make up the retaining assembly are only examples. The retaining assembly can also be understood to have other configurations, as long as it can provide rotational support for the eccentric pressure roller 202.

[0057] The pivot axis (i.e., the first axis 2) formed by the rotation of the eccentric pressure roller 202 along the rotation surface 160 and the center of the eccentric pressure roller 202 (i.e., Figure 20The eccentric pressure roller 202 deviates from the center P of the circle, causing a lateral rotational offset during rotation. This allows the eccentric pressure roller 202 to form line or surface contact with the edge 223 or the edge region 222 containing the edge 223, preferably surface contact. When surface contact is formed, the eccentric pressure roller 202 can also be understood as an elliptical or other irregularly shaped part with a recessed region 230 and a pressing section 130. When the eccentric rotating pressure block has a recessed region 230 and a circular pressing section 130, the eccentric rotating pressure block is considered as the eccentric pressure roller 202.

[0058] Combination Figure 4 , Figure 5 , Figures 16 to 19 As shown, during the rotation of the eccentric pressure roller 202 along the rotation surface 160, four typical positions are formed: eccentric pressure roller 202a, eccentric pressure roller 202b, eccentric pressure roller 202c, and eccentric pressure roller 202d. Among them, eccentric pressure roller 202a is the state corresponding to the first extreme position (i.e., Figure 4 The eccentric pressure roller 202a corresponds to the solid line, and the eccentric pressure roller 202d corresponds to the state of the second extreme position (i.e., Figure 4 The eccentric pressure roller 202d corresponds to the dashed line in the middle. (For example...) Figure 4 As shown, the eccentric pressure roller 202a, with its rotating boundary E22 formed near the strip opening 422 and perpendicular to the surface of the hot box door 200, separates from the edge 223 of the hot box door 200 between the boundary F22 formed by completely closing the strip opening 422, and a gap 209 is formed between the eccentric pressure roller 202a and the front cover 201. When the eccentric pressure roller 202a is continuously rotated, it eventually reaches a second extreme position where the pressing section 130 and the closed surface 220 formed by the hot box door 200 are completely in contact. In the state corresponding to the second extreme position, the eccentric pressure roller 202d, with its rotating boundary E25 near the strip opening 422 and perpendicular to the surface of the hot box door 200, completely covers the boundary F22. The eccentric pressure roller rotating boundaries E22~E25 are formed by the eccentric pressure roller 202 rotating along the first axis 2, and the aforementioned gap 209 gradually disappears during rotation. Figures 16 to 19 From this perspective, the front cover 201 is located on both sides of the hot box door 200, which is in a closed state 220. It should be understood that, in Figures 16 to 19 , Figures 21 to 24 , Figure 26 In the middle, the 200 hot box doors are all surrounded by something similar to Figure 28 and Figure 29 The hot box door 200 shown is rotated via a pivot shaft 5 formed by a hinge 2020 to establish a pivotal connection.

[0059] Exemplarily, during the rotation of the eccentric pressing wheel 202, the pressing section 130 gradually fits with the plane where the hot box door 200 is located, so as to apply at least a pressing force f3 perpendicular to the working surface to the edge area 222 of the hot box door 200 from the pressing section 130. As a preferred method, the eccentric pressing wheel 202 has a certain thickness along the direction of the first axis 2, so that the pressing section 130 forms a pressing surface for applying the pressing force f3, and after the strip-shaped opening 422 is closed by the hot box door 200, the pressing section 130 gradually fits with the plane where the hot box door 200 is located and forms a surface contact. Combining Figure 7 As shown, in all rotation states of the eccentric pressing wheel 202, such as the two extreme positions and the intermediate state position between the two extreme positions, the eccentric pressing wheel 202 is separated from the front cover plate 201 to avoid rotational interference between the eccentric pressing wheel 202 and the front cover plate 201.

[0060] Figures 16 to 20 , Figures 21 to 25 , Figures 26 to 27 They respectively correspond to three typical specific implementation manners of the eccentric pressing wheel 202 included in the hot box door locking mechanism, and the hot box door 200 rotates along the pivot shaft 5. Combining Figure 7 As shown, when the hot box door 200 rotates clockwise to open the strip-shaped opening 422, and when the hot box door 200 rotates counterclockwise to close the strip-shaped opening 422.

[0061] Refer to Figures 16 to 20 An embodiment of the corresponding eccentric pressing wheel 202.

[0062] In this embodiment, the pressing section 130 is configured as a flat edge, the eccentric pressing wheel 202 is recessed inward to form an avoidance notch 230, and the pressing section 130 is formed inside the avoidance notch 230. During the rotation of the eccentric pressing wheel 202, a rotation surface 160 is formed, and the rotation surface 160 intersects with the transition state surface 210 formed when the hot box door 200 is in any rotation state of actively opening and closing the strip-shaped opening 422, and more preferably, the rotation surface 160 is always perpendicular to the closed state surface 220. In this embodiment, the avoidance notch 230 sequentially forms a first transition section 131, a pressing section 130, a second transition section 132, a third transition section 133 and a fourth transition section 134. The maximum rotation radius R1 formed by the fourth transition section 134 during the rotation of the eccentric pressing wheel 202 is smaller than the shortest distance T1 formed by the edge 223 of the hot box door 200 close to the hot box door locking mechanism and the first axis 2 when the hot box door 200 closes the strip-shaped opening 422, and the maximum rotation radius R3 formed by the first transition section 131 during the rotation of the eccentric pressing wheel 202 is greater than the shortest distance T1. The first transition section 131 and the fourth transition section 134 have an arc profile and are naturally transitioned with the edge of the eccentric pressing wheel without the avoidance notch 230. As Figure 20As shown, the center of the eccentric pressure roller 202 is P, and the central axis of rotation of the eccentric pressure roller 202 along the rotation surface 160 is axis 2. During the process of the hot box door 200 closing the strip opening 422, the edge 223 of the hot box door near the hot box door locking mechanism, which is perpendicular to the working surface, forms the hot box door boundary F22 and the eccentric pressure roller rotation boundary E22~E25 formed by the eccentric pressure roller 202 near the strip opening 422 and perpendicular to the working surface. The boundary changes from being separated to overlapping.

[0063] like Figure 16 As shown, Figure 16 The corresponding release state corresponds to the eccentric pressure roller 202a. The rotation boundary E22 of the eccentric pressure roller is separated from the boundary F22 of the hot box door. The hot box door 200 does not interfere with the eccentric cam 202a during the rotation along the pivot axis 5. The hot box door rotation profile 250 formed by the edge 223 of the eccentric pressure roller 202 near the hot box door locking mechanism during the rotation of the hot box door 200 has no intersection with the eccentric cam 202a. At this time, the hot box door 200 can be freely opened or closed by the strip opening 422.

[0064] like Figure 17 As shown, Figure 16 After the eccentric pressure roller 202a rotates clockwise along the first shaft 2 by a certain angle, it forms... Figure 17 The transition state corresponding to the eccentric pressure roller 202b. Figure 17 In the process, the eccentric pressure roller rotation boundary E23 and the hot box door boundary F22 begin to overlap, with an overlap width of L1. The hot box door rotation profile 250 and the profile of the eccentric pressure roller 202b form focal points P1 and P2. The eccentric pressure roller rotation boundary E23 and the hot box door boundary F22 further overlap. (Note: The last sentence appears to be a separate, unrelated statement.) Figure 17The focal points P1 and P2 are not strictly necessary; it is sufficient that the eccentric pressure roller 202 ensures that the holding section 130 at least covers the edge 223 in the final rotation state. A space of height H5 is formed between the focal point P2 and the closed surface 220. After the hot box door 200 is gradually closed by the rotation of the flip handle 11, as long as it is rotated counterclockwise past the focal point P2, a holding force f3 can be applied to the hot box door surface 210 through the holding section 130 during the subsequent rotation of the eccentric cam 202. Due to the relatively long length of the hot box 1000, the flexible heat insulation strip 243 may experience inconsistent deformation during the process of driving the hot box door 200 to close the strip opening 422 solely by rotating the flip handle 11. This may cause the hot box door 200 to slightly tilt after closing. By reserving a space with a height of H5, the subsequent eccentric pressure roller 202 can apply a holding force f3 perpendicular to the working surface to the edge area 222 of the hot box door 200, thereby significantly increasing the holding stroke. This facilitates a greater degree of overall compression deformation of the flexible heat insulation strip 243, further improving the density and heat insulation effect of the flexible heat insulation strip 243.

[0065] like Figure 18 As shown, Figure 17 After the eccentric pressure roller 202b rotates clockwise along the first shaft 2 by a certain angle, it forms... Figure 18 The transition state corresponding to the eccentric pressure roller 202c. The rotation boundary E24 of the eccentric pressure roller further overlaps with the boundary F22 of the hot box door, and the overlap width increases to L2. The maximum rotation radius R1 formed by the fourth transition segment 134 during the rotation of the eccentric pressure roller 202 is less than the shortest distance T1 formed by the edge 223 of the hot box door 200 near the hot box door locking mechanism and the first shaft 2 when the hot box door 200 closes the strip opening 422. During the rotation of the eccentric pressure roller 202c, the fourth transition segment 134 must remain separated from the edge 223 to prevent the eccentric pressure roller 202c from colliding with the edge 223 of the hot box door 200. At the same time, the maximum rotation radius R3 formed by the first transition segment 131 during the rotation of the eccentric pressure roller 202 is greater than the shortest distance T1 to ensure that the pressing segment 130 can at least cover the edge 223.

[0066] like Figure 19 As shown, Figure 18 After the eccentric pressure roller 202c rotates clockwise along the first shaft 2 by a certain angle, it forms... Figure 19 The final state corresponding to the eccentric pressure roller 202d. The rotation boundary E25 of the eccentric pressure roller further overlaps with the boundary F22 of the hot box door, the overlap width increases to L3, and the lateral width of the overlap area is at its maximum. Figure 17 Change to Figure 19During the process, the included angle between the pressing section 130 and the closed state surface 220 gradually decreases, and finally a pressing state of surface contact is formed by the pressing section 130, the edge 223, and the edge area 222 including the edge 223. It should be noted that in the fully pressed state, the shorter the distance between the first axis 2 and the edge 223, the better, which is beneficial to preventing the eccentric pressing wheel 202 from rotating reversely and losing the pressing state of the hot box door 200. In this embodiment, surface contact is formed by the pressing section 130, the edge 223, and the edge area 222, which can prevent the eccentric pressing wheel 202d from reversing counterclockwise and loosening the pressing state of the hot box door 200. In the foregoing embodiment, the avoidance notch 230 of the eccentric pressing wheel 202 is formed by the circle with point P as the center and the outer sides of the first transition section 131, the pressing section 130, the second transition section 132, the third transition section 133, and the fourth transition section 134 enclosing together.

[0067] See Figures 21 to 25 Another embodiment of the corresponding eccentric pressing wheel 202.

[0068] In this embodiment, the eccentric pressing wheel 202 (i.e., a specific concept of the rotating pressing member) rotates to form the first axis 2. The pressing section 130a is configured as a flat edge, the eccentric pressing wheel 202 is recessed inward to form an avoidance notch 230a, and the pressing section 130a is formed on the inner side of the avoidance notch 230a. During the rotation of the eccentric pressing wheel 202, a rotating surface 160 is formed. The rotating surface 160 intersects with the transition state surface 210 formed when the hot box door 200 is in any rotating state of actively opening and closing the strip-shaped opening 422, and more preferably, the rotating surface 160 is always perpendicular to the closed state surface 220, so that the pressing section 130a can more effectively press the edge 223 and the edge area 222 including the edge 223. In this embodiment, the avoidance notch 230 sequentially forms the first transition section 131 and the pressing section 130. The minimum rotation radius R2 formed by the pressing section 130 during the rotation of the eccentric pressing wheel 202 is less than the shortest distance T2 formed by the edge 223 of the hot box door 200 close to the hot box door locking mechanism and the first axis 2 when the hot box door 200 closes the strip-shaped opening 422, and the maximum rotation radius R4 formed by the first transition section 131 during the rotation of the eccentric pressing wheel 202 is greater than the shortest distance T2. The first transition section 131 has an arc-shaped profile and naturally transitions with the edge of the eccentric pressing wheel without the avoidance notch 230. As Figure 25As shown, the center of the eccentric pressure roller 202 is P, and the central axis of rotation of the eccentric pressure roller 202 along the rotation surface 160 is the first axis 2. During the process of the hot box door 200 closing the strip opening 422, the edge 223 of the hot box door near the hot box door locking mechanism, perpendicular to the working surface, forms the hot box door boundary F22, which is perpendicular to the working surface, and the eccentric pressure roller 202 near the strip opening 422 and perpendicular to the working surface, forming the eccentric pressure roller rotation boundary E26~E29, which changes from being separated to overlapping. The working surface is formed by… Figure 1 The plane defined by the X and Y axes in the coordinate system.

[0069] like Figure 21 As shown, Figure 21 The corresponding release state corresponds to the eccentric pressure roller 202e. The rotation boundary E26 of the eccentric pressure roller is separated from the boundary F22 of the hot box door. During the rotation of the hot box door 200 along the pivot axis 5, there is no interference with the eccentric cam 202e. The hot box door rotation profile 250 formed by the edge 223 of the eccentric pressure roller 202 near the hot box door locking mechanism during the rotation of the hot box door 200 has no intersection with the eccentric cam 202e. At this time, the hot box door 200 can be freely opened or closed with the strip opening 422.

[0070] like Figure 22 As shown, Figure 21 After the eccentric pressure roller 202e rotates clockwise along the first shaft 2 by a certain angle, it forms... Figure 22 The transition state corresponding to the eccentric pressure roller 202f. Figure 22 In the middle, the rotating profile 250 of the hot box door and the eccentric pressure roller 202f begin to form a focal point. The rotating boundary E27 of the eccentric pressure roller overlaps with the boundary F22 of the hot box door, with an overlap width of L4.

[0071] like Figure 23 As shown, the rotating profile 250 of the hot box door and the eccentric pressure roller 202h form focal points P3 and P4. (Note:) Figure 23 The focal points P3 and P4 are not essential; it is sufficient to ensure that the eccentric pressure roller 202, at the end of its rotation, ensures that the holding section 130 at least covers the edge 223. The eccentric pressure roller's rotation boundary E28 further overlaps with the hot box door boundary F22, increasing the overlap width to L5. The maximum rotation radius R4 formed by the first transition section 131 during the rotation of the eccentric pressure roller 202 is greater than the shortest distance T2, thus ensuring that the holding section 130a at... Figure 24 In the final state, the pressing segment 130a can cover the edge 223 and the edge region 222 containing the edge 223.

[0072] like Figure 24 As shown, Figure 23After the middle eccentric pressing wheel 202h rotates clockwise by a certain angle along the first axis 2, it forms Figure 24 The final state corresponding to the middle eccentric pressing wheel 202i. The rotation boundary E29 of the eccentric pressing wheel and the boundary F22 of the hot box door are further overlapped, and the overlapping width increases to L6, and the lateral width of the overlapping area is in the maximum state. During the process from Figure 22 changing to Figure 24 the included angle between the pressing section 130a and the closed state surface 220 gradually becomes smaller, and finally a pressing state of surface contact is formed by the pressing section 130a, the edge 223 and the edge area 222 including the edge 223. It should be noted that in the fully pressed state, the shorter the distance between the first axis 2 and the edge 223, the better. By forming surface contact between the pressing section 130a, the edge 223 and the edge area 222, it is possible to prevent the eccentric pressing wheel 202h from reversing counterclockwise and loosening the pressing state of the hot box door 200. In the foregoing embodiment, the avoidance notch 230 of the eccentric pressing wheel 202a is formed by the circle with point P as the center and the outer sides of the first transition section 131 and the pressing section 130a.

[0073] Refer to Figures 26 to 27 Another embodiment of the corresponding eccentric pressing wheel 202.

[0074] In this embodiment, the pressing section 130b is configured as a flat edge, the eccentric pressing wheel 202j is recessed inward to form an avoidance notch 230b, and the pressing section 130b is formed inside the avoidance notch 230b. During the rotation of the eccentric pressing wheel 202, a rotation surface 160 is formed, and the rotation surface 160 intersects with the transition state surface 210 formed when the hot box door 200 is in any rotation state of actively opening and closing the strip-shaped opening 422, and more preferably, the rotation surface 160 and the closed state surface 220 always remain perpendicular. In this embodiment, the avoidance notch 230b is only formed by the pressing section 130. The minimum rotation radius R2 formed by the pressing section 130b during the rotation of the eccentric pressing wheel 202 is smaller than the shortest distance T2 formed by the edge 223 of the hot box door 200 close to the hot box door locking mechanism and the first axis 2 when the hot box door 200 closes the strip-shaped opening 422, and the maximum rotation radius R5 formed by the pressing section 130b during the rotation of the eccentric pressing wheel 202 is greater than the shortest distance T2. As Figure 27 shown, the center of the eccentric pressing wheel 202j is P, and the central axis of the eccentric pressing wheel 202j rotating along the rotation surface 160 is the axis 2. During the process of the hot box door 200 closing the strip-shaped opening 422, the edge 223 of the hot box door 200 close to the hot box door locking mechanism changes from being separated from each other to overlapping with the rotation boundary E30 of the eccentric pressing wheel 202j close to the strip-shaped opening 422 and perpendicular to the working surface during the process of the hot box door 200 actively opening and closing the strip-shaped opening 422. The working surface is formed by Figure 1The plane defined by the coordinate axes X and Y.

[0075] As Figure 26 shown, Figure 26 similar to Figure 23 the rotational state of the eccentric pressure wheel 202 in. In this embodiment, the boundary F22 of the hot box door and the rotational boundary E22 of the eccentric pressure wheel also change from being separated to overlapping each other, and as the eccentric pressure wheel 202j rotates, the overlapping area between the boundary F22 of the hot box door and the rotational boundary E30 of the eccentric pressure wheel gradually increases, and finally forms a surface contact through the pressing section 130b, the edge 223, and the edge area 222, which can prevent the eccentric pressure wheel 202j from reversing counterclockwise and loosening the pressing state of the hot box door 200. As Figure 27 shown, in the foregoing embodiment, the avoidance notch 230b of the eccentric pressure wheel 202j is formed by the circle centered at point P and the outer side of the pressing section 130b. The avoidance notch 230b formed by the eccentric pressure wheel 202j in this embodiment is only composed of the pressing section 130b whose cross-section along the rotating surface 160 is a straight line. Since the eccentric pressure wheel 202j forms a certain thickness along the direction of the first axis 2, the pressing section 130b forms a rectangle, so that during the process of the pressing section 130b applying a pressing force to the edge 223 of the hot box door 200 or the edge area 222 including the edge 223, a line contact can be formed by part of the pressing section 130b and the edge 223, or a surface contact can be formed by the pressing section 130b on the edge area 222 of the hot box door 200 including the edge 223, and preferably a surface contact is formed. At this time, no arc transition section such as the first transition section 131 in the foregoing embodiment is formed between the pressing section 130b and the circular edge of the eccentric pressure wheel 202j, and a strip-shaped edge 131b and a strip-shaped edge 132b are directly formed.

[0076] Refer Figure 28 to another embodiment of a hot box door locking mechanism corresponding to

[0077] In this embodiment, the rotating pressing member is an eccentric rotating pressing block, and more specifically, an eccentric pressing strip 212. The eccentric pressing strip 212 rotates along the first axis 2 to press the edge 223 of the hot box door 200 and the edge region 222 containing the edge 223, forming a closed surface 220. The cross-sectional shape of the eccentric pressing strip 212 along the first axis 2 includes, but is not limited to, a rectangle, an ellipse, etc. Specifically, during the process of the drive shaft 300 driving the eccentric pressing strip 212 to rotate along the first axis 2, as the eccentric pressing strip 212 and the hot box door 200 change from being separated to being in contact, the eccentric pressing strip 212 applies a pressing force f3 to the edge 223a of the hot box door 200 to force the hot box door 200 to rotate and form the closed surface 220. After the hot box door 200 initially closes the strip opening 422, the angle formed between the transition surface defined between the surface of the hot box door 200 and the pivot axis 5 and the surface of the front cover 201 is greater than the angle between the surface of the hot box door 200a and the closed surface 220 defined between the pivot axis 5. The eccentric pressure strip 212b applies a holding force f3 only to the edge 223a to form... Figure 28 The closed surface 220a is formed by the hot box door 200a. At this time, the surface of the hot box door 200 and the surface of the front cover 201 do not necessarily maintain absolute parallelism. Of course, the closed surface 220a can also be understood as the eccentric pressure strip 212b continuing to... Figure 28 The hot box door 200a is further pressed to form a surface contact pressing process, and finally forms Figure 28 The state presented by the hot box door 200b and the eccentric pressure strip 212c ultimately forms a closed state surface 220b. At this time, the surface of the hot box door 200b remains parallel to the surface of the front cover 201. It should be noted that both closed state surfaces 220a and 220b belong to closed state surface 220.

[0078] To make the rotary holding member 202 apply a holding force f3, it is necessary to ensure that at least one intersection point Q1 is formed between the rotary holding member rotation contour 270 formed on the side close to the hot box door 200 during the rotation of the rotary holding member 202 and the hot box door rotation contour 250, so that an overlapping area S1 is formed between the rotary holding member rotation contour 270 and the hot box door rotation contour 250. When the hot box door 200 closes the strip-shaped opening 422, although a certain deformation can occur to the flexible heat insulation strip 243 through the pre-tightening tension formed by the spring 253, this deformation is obviously not sufficient to press the hot box door 200 to rotate to the ideal closed state surface 220. In addition, during the process of the drive shaft 300 driving the rotary holding member 202 to rotate, after the rotary holding member 202 contacts the front cover plate 201, a holding force f3 that causes the front cover plate 201 to form the closed state surface 220 is applied from the rotary holding member 202 to the front cover plate 201. Therefore, it is necessary to further rotate one or more rotary holding members 202 by rotating the holding handle 21, so as to press the hot box door 200 to continue to rotate to the closed state surface 220 and maintain it after flipping and closing the strip-shaped opening 422. It should be noted that there is no overlapping intersection point or tangent point between the other rotary holding member rotation contour 271 formed on the side of the rotary holding member 202 away from the hot box door 200 during the rotation process and the front cover plate 201, thus avoiding interference and collision between the rotary holding member 202 and the front cover plate 201 during the rotation along the first axis 2.

[0079] Refer to Figure 29 Another embodiment of a hot box door locking mechanism corresponding thereto.

[0080] In this embodiment, the rotary holding member is a symmetric rotary pressing block, and more specifically, a symmetric rotary pressing strip 232. The symmetric rotary pressing strip 232 rotates along the first axis 2, and the lateral rotation offset formed by the rotation of the symmetric rotary pressing strip 232 is used to press the edge 223 of the hot box door 200 and the edge area 222 including the edge 223 to form the closed state surface 220. Figure 29 In the corresponding embodiment, the first axis 2 coincides with the geometric symmetry center of the symmetric rotary pressing strip 232.

[0081] Specifically, during the process of the drive shaft 300 driving the symmetrical rotating pressure strip 232 to rotate along the first shaft 2, as the symmetrical rotating pressure strip 232 and the hot box door 200 change from being separated to being in contact, the symmetrical rotating pressure strip 232 applies a holding force f3 to the edge 223a of the hot box door 200 to force the hot box door 200 to rotate and form a closed state surface 220. After the hot box door 200 initially closes the strip opening 422, the angle formed between the transition state surface defined between the surface of the hot box door 200 and the pivot shaft 5 and the surface of the front cover 201 is greater than the angle between the surface of the hot box door 200a and the closed state surface 220 defined between the pivot shaft 5. The symmetrical rotating pressure strip 232b applies a holding force f3 only to the edge 223a to form Figure 29 The closed state surface 220c is formed by the hot box door 200a. At this time, the surface of the hot box door 200 and the surface of the front cover 201 do not necessarily maintain an absolutely parallel state. Of course, the closed state surface 220 can also be understood as the symmetrically rotating pressure strip 232 continuing to... Figure 29 The hot box door 200a is further pressed to form a surface contact pressing process, and finally forms Figure 29 The state presented by the hot box door 200b and the symmetrical rotating pressure strip 232c ultimately forms a closed state surface 220d. At this time, the surface of the hot box door 200b remains parallel to the surface of the front cover 201. It should be noted that both closed state surfaces 220c and 220d belong to closed state surface 220. The aforementioned symmetrical rotating pressure block can also be an elliptical cross-section along the first axis or other rotating pressure members with a centrally symmetrical structure, and can form various other deformable structures with lateral rotational offset during rotation.

[0082] To ensure that the symmetrical rotating pressure strip 232 applies a holding force f3, it is necessary to ensure that the rotating profile 272 of the rotating pressure member formed on the side of the symmetrical rotating pressure strip 232 near the hot box door 200 during rotation forms at least one intersection point Q2 with the rotating profile 250 of the hot box door, thereby creating an overlapping area S2 between the rotating profile 272 of the rotating pressure member and the rotating profile 250 of the hot box door. It should be noted that the other rotating profile 273 of the rotating pressure member formed on the side of the symmetrical rotating pressure strip 232 away from the hot box door 200 during rotation has no overlapping intersection point or tangent point with the front cover plate 201, thus avoiding interference and collision between the symmetrical rotating pressure strip 232 and the front cover plate 201 during rotation along the first axis 2. Figure 29 Corresponding embodiments and Figure 28 The technical solutions with the same parts as the rotating pressing member included in the corresponding embodiments and the aforementioned hot box door locking mechanism are described in the foregoing embodiments and will not be repeated here.

[0083] Optionally, the number of holding mechanisms 100 is at least one, and may include at least two holding mechanisms 100, including a total of two; for example, two holding mechanisms 100 are synchronously rotated by a drive shaft 302 to connect the two holding mechanisms 100, and another drive shaft 301 drives one of the holding mechanisms 100 located below. The rotating holding members are separated from each other along the pivot axis direction of the drive shaft 300 (i.e., the first shaft 2); as a preferred embodiment, two or more holding mechanisms 100 are symmetrically arranged at the middle position of the strip opening 422 along its length direction (i.e., Figure 2 (The position indicated by the middle arrow C) on both sides. This allows the holding force f3 applied by the two (or three) holding mechanisms 100 to the edge 223 and the edge region 222 containing the edge 223 during rotation to be evenly distributed along the entire length of the hot box door 200. This makes the compression and deformation of the flexible heat insulation strip 243 along its length more uniform or consistent, and thus makes the degree of closure of the hot box door 200 when closing the strip opening 422 consistent along the length of the hot box door 200 or the strip opening 422. This allows the flexible heat insulation strip 243 to compact and fill the heat insulation cavity 401 below the strip-shaped opening 422 during the filling process, effectively preventing the flexible heat insulation strip 243 from coming out of the long strip-shaped heat insulation cavity 401 after being pressed into it. This ensures that the heat box door 200 effectively closes the strip-shaped opening 422 and the heat insulation cavity 401, thus completely eliminating any gaps between the heat box door 200 and the front cover 201. Furthermore, after the rotating clamping member applies the holding force f3 to the heat box door 200, the deformation and compaction effect of the flexible heat insulation strip 243 have good consistency and uniformity along the length of the strip-shaped opening 422.

[0084] The holding handle 21 extends downwards at an angle past the end of the strip opening 422. This end is configured as either a yarn inlet 75 or a yarn outlet 76. The holding handle 21 is longitudinally and movably connected to the drive shafts 301 / 302. The drive shafts 301 and 302 are parallel to the strip opening 422. The holding handle 21 rotates synchronously with at least two holding mechanisms 100. The hot box door 200 is equipped with a flexible heat-insulating strip 243 that can movably open and close the strip opening 422. The hot box 1000 is inclined relative to the ground 4, with an angle X1 between the plane of the hot box 1000 and the ground 4. X1 can be any angle between 20° and 45°. Because the flip handle 11 and the holding handle 21 can extend downwards at an angle, and their lengths can be flexibly adjusted according to the actual layout of the false twist texturing machine, the height H1 formed by the ends of the flip handle 11 and the holding handle 21 extending out of the hot box 1000 is much smaller than... Figure 2The height H2 formed at the position indicated by arrow C is such that it is convenient for an operator to directly rotate the flipping handle 11 and the pressing handle 21 while standing on the ground 4.

[0085] Refer Figures 1 to 15 As shown, the hot box door 200 is used to movably open and close the strip-shaped opening 422 provided in the hot box 1000 pivotally connected to the hot box door 200. The hot box door 200 includes: a strip-shaped panel 240, a first end plate assembly 120 and a second end plate assembly 260 provided at the longitudinally extending end of the strip-shaped panel 240 along its length direction, a mounting substrate 244, a flexible heat insulation strip 243 detachably connected to the mounting substrate 244, a hot box door locking mechanism as in any of the foregoing embodiments, and a hot box door rotation mechanism. The rotating pressing member rotates to form a first axis 2, and the hot box door rotation mechanism drives the hot box door 200 to rotate to form a second axis 1. The first axis 2 and the second axis 1 are arranged in parallel and formed on both sides of the strip-shaped opening 422, and the flipping handle 11 and the pressing handle 21 can be arranged to extend obliquely downward. The hot box door rotation mechanism includes: a flipping handle 11, a driving rod 12 biased outside the strip-shaped opening 422 and inserted into the second end plate assembly 260. The flipping handle 11 and the driving rod 12 are longitudinally movably connected. The flipping handle 11 extends to the end of one end passing through the strip-shaped opening 422, and the flipping handle 11 drives the hot box door 200 to pivot along the second axis 1.

[0086] For an M-type false twist texturing machine, the ends of the flipping handle 11 and the pressing handle 21 extending obliquely downward can be directly operated by an operator standing on the ground 4 without the need to use an operation trolley 700 as shown in Figure 31 to perform the opening / closing operation of the hot box door 200 and the pressing operation of the hot box door 200 through the hot box door locking mechanism, thus significantly improving the operation convenience.

[0087] In another example, the hot box 1000 provided with the hot box door 200 is arranged above the operation passage 900 formed by the false twist texturing machine 10000 as shown in Figure 30 so that it is convenient for an operator to manually rotate the flipping handle 11 to perform the movable opening and closing operation of the hot box door 200 without the need to use an operation trolley 700 as shown in Figure 31 When the hot box door 200 substantially closes the strip-shaped opening 422, by manually rotating the pressing handle 21, one or two eccentric pressure wheels 202 included in the hot box door locking mechanism rotate along the rotating surface 160, and a pressing force f3 perpendicular to the working surface is applied to the hot box door 200 in the area of the edge 223 of the hot box door 200 close to the hot box door locking mechanism and the part area including the edge 223 and close to the pivot shaft 5 through the pressing section 130 included in the eccentric pressure wheel 202.

[0088] Combined with Figure 8 and Figure 10 As shown, after the aforementioned pressing force f3 is dispersed by the hot box door 200, an extrusion force is evenly applied to the flexible heat insulation strip 243, so that after the flexible heat insulation strip 243 undergoes uniform and overall inward compression deformation, it is reliably held in the heat insulation cavity 401 to achieve the effect of heat insulation and heat preservation. At the same time, after the flexible heat insulation strip 243 undergoes inward overall compression deformation, a frictional force is formed between the two inclined surfaces 2434 of the flexible heat insulation strip 243 and the side wall 411. Under the action of the pressing force f3 applied by the pressing mechanism 100, the deformed flexible heat insulation strip 243 can be extruded and inserted into the heat insulation cavity 401, and the relative position relationship and clamping state of the flexible heat insulation strip 243 in the heat insulation cavity 401 are maintained through the aforementioned frictional force, so as to prevent the flexible heat insulation strip 243 from bulging or disengaging from the heat insulation cavity 401, effectively avoiding the formation of a gap between the hot box door 200 and the front cover plate 201 after the hot box door 200 closes the strip-shaped opening 422, so that the closing degree of the hot box door 200 has good closing consistency and closing degree uniformity in the length extension direction of the strip-shaped opening 422, which is conducive to keeping the hot box door 200 in the closed state surface 220.

[0089] Refer Figure 3 to Figure 6 As shown, the transmission shaft 302 is movably connected to the pressing handle 21 along the first axis 2. The transmission shaft 302 passes through the first positioning sleeve 22, the first positioning sleeve 22 is fixed on the mounting seat 24, and the mounting seat 24 is fixedly connected to the second end plate 50. The transmission shaft 302 extends out of the first positioning sleeve 22 in the direction of the second end plate 50, the pressing handle 21 is longitudinally inserted into the transmission shaft 302, and a pin 23 can be horizontally inserted through the pin holes 211 of the continuous penetration of the pressing handle 21 and the transmission shaft 302 to realize the rotation of the transmission shaft 302 and the transmission shaft 301 along the direction of the first axis 2 based on the rotation of the pressing handle 21 in the direction of arrow TR3 or TR4. Optionally, the pressing handle 21 has a hollow structure, and the transmission shaft 302 extends downward past the end of the first positioning sleeve 22 to form a reduced-diameter portion 3021 inserted into the pressing handle 21. Optionally, a positioning member (for example, a sphere) driven by a spring can be embedded inside the first positioning sleeve 22, and at the same time, a plurality of positioning gaps (for example, hemispherical gaps) adapted to the positioning member are formed on the outer side of the shaft portion of the transmission shaft 300 inserted into the first positioning sleeve 22. The positioning member can be movably embedded in the positioning gap, which is further conducive to maintaining the rotation state of the transmission shaft 300, further preventing the rotary pressing member from loosening reversely, and thus conducive to keeping the hot box door 200 in the closed state corresponding to the closed state surface 220.

[0090] Similarly, the second end plate assembly 260 is disposed on one side of the second end plate 50 and connected to the hot box door 200. The second end plate assembly 260 forms a plate 264 laterally, and a rod 12, which is coaxially disposed with the flip handle 11 along the second axis 1, is inserted into a pre-set through hole 265 on the plate 264 and extends through the plate 264. For example, the rod 12 and the plate 264 can be fixed by welding. The flip handle 11 and the rod 12 are longitudinally inserted, and the rod 12 forms a connecting section 121 extending into the hollow structure of the flip handle 11, and can be laterally inserted through a pin hole 122 that continuously penetrates the flip handle 11 and the rod 12 by a pin 13. The second end plate assembly 260 has a similar structure to the first end plate assembly 120. The second end plate assembly 260 includes a second end plate body 261 and two bent portions 262 perpendicular to the second end plate body 261. The bent portions 262 form a fourth through hole 263 for connecting with the strip panel 240. The strip panel 240 has a third through hole 44 at one end near the second end plate assembly 260, which is adapted to the fourth through hole 263. A bent portion 262 is attached to the surface of the strip panel 240, and a locking element (e.g., a screw) continuously passes through the fourth through hole 263 and the third through hole 44 to reliably connect the second end plate assembly 260 to the strip panel 240. The second end plate assembly 260 does not have a first post 251.

[0091] Combination Figure 3 As shown, rotating the flip handle 11 in the direction of arrow TR1 will drive the hot box door 200 along the second axis 1 as the pivot axis. Figure 7 Open the heat chamber door 200 in the direction of arrow b; rotate the flip handle 11 in the direction of arrow TR2, and the heat chamber door 200 will be driven along the second axis 1 as the pivot axis. Figure 7 The hot box door 200 is closed in the direction of arrow a. Rotating in the direction of arrow TR3 drives one or two eccentric pressure rollers 202 to rotate counterclockwise along the rotation surface 160, relieving the holding force f3 applied by the holding section 130 to the edge 223; rotating in the direction of arrow TR4 drives one or two eccentric pressure rollers 202 to rotate clockwise along the rotation surface 160, ultimately forming... Figure 19 The shown compression state ensures that the flexible insulation strip 243 reliably fills the insulation cavity 401 and prevents the heat box door 200 from loosening and moving along the strip opening 422 after the flexible insulation strip 243 closes it. Figure 7 Slight loosening occurs in the direction of arrow b, which improves the filling and insulation effect of the flexible insulation strip 243 included in the hot box door 200 on the strip opening 422 and the insulation cavity 401, thus preventing heat loss.

[0092] The flexible heat insulation strip 243 includes an internal heat insulation layer 2432 and a protective layer 2431 that integrally covers the internal heat insulation layer 2432. The protective layer 2431 is movably inserted into the mounting substrate 244, and the mounting substrate 244 is detachably connected to the strip panel 240. On one side of the protective layer 2431 facing the mounting substrate 244, a number of fixing bands 247 are formed for the mounting substrate 244 to continuously penetrate along the longitudinal extension direction of the flexible heat insulation strip 243. The mounting substrate 244 forms a number of first through holes 248 not blocked by the fixing bands 247, and the strip panel 240 forms second through holes 245 adapted to the first through holes 248. The first through holes 248 and the second through holes 245 are fixedly connected by locking members. In this embodiment, the number of the fixing bands 247 is at least two. After the mounting substrate 244 passes through the fixing bands 247, a shielding portion 201 blocked by the fixing bands 247 is formed, and an exposed portion 202 is formed between two adjacent fixing bands 247. The second through holes 245 are opened in the exposed portion 202 and thus cannot be blocked by the fixing bands 247. The fixing bands 247 can be made of the same high-temperature resistant fabric as the protective layer 2431. At the same time, referring Figure 4 to Figure 10 as shown, the width of the mounting substrate 244 is smaller than the width W1 of the flexible heat insulation strip 243 near the strip panel 240, so that after the flexible heat insulation strip 243 completely fills the heat insulation cavity 401 or the flexible heat insulation strip 243 partially fills the heat insulation cavity 401, part of the flexible heat insulation strip 243 can form a partial fitting state with the strip panel 240 to further prevent heat loss.

[0093] Referring Figure 3 to Figures 9 to 14The first endplate assembly 120 includes a first endplate body 121, and the second endplate assembly 260 includes a second endplate body 261. Supporting blocks 127 are respectively provided on the opposing surfaces of the first endplate body 121 and the second endplate body 261. The supporting blocks 127 abut against both ends of the flexible thermal insulation strip 243, forming gaps 245 between the two ends of the flexible thermal insulation strip 243 extending longitudinally along its length and the first endplate body 121 and the second endplate body 261, respectively. The supporting blocks 127 abut against the trapezoidal ends of the flexible thermal insulation strip 243 to form gaps 245. Gap 245 is formed between the ends of the flexible thermal insulation strip 243 and the first endplate body 121 and the second endplate body 261. Thus, a gap 245 is formed between both ends of the flexible thermal insulation strip 243 and both ends of the first endplate assembly 120 and the second endplate assembly 260. In this embodiment, by introducing gap 245, air with low thermal conductivity can be used as a heat insulation layer to further isolate the longitudinal transfer of heat, thereby preventing heat from escaping from the first end plate assembly 120 and / or the second end plate assembly 260 to the external space of the heat box 1000. The aforementioned longitudinal direction is along the length of the flexible heat insulation strip 243 (or strip panel 240). The two ends of the strip panel 240 form through holes (not labeled) adapted to the third through hole 44. The locking member 128 continuously penetrates the two ends of the strip panel 240 to form through holes (not labeled) adapted to the third through hole 44, and is screwed and fixed to the third through hole 44, thereby fixing the first end plate assembly 120 and the second end plate assembly 260 to the strip panel 240 respectively, so as to reliably install them at the two ends of the strip panel 240.

[0094] The first endplate assembly 120 includes a first endplate body 121 and two bent portions 125 perpendicular to the first endplate body 121. The bent portions 125 form a fifth through hole 126 for connection with the strip panel 240. The strip panel 240 has a third through hole 44 adapted to the fifth through hole 126 at one end near the first endplate assembly 120. A bent portion 262 is attached to the surface of the strip panel 240, and a locking element (e.g., a screw) continuously passes through the fifth through hole 126 and the third through hole 44 to reliably connect the first endplate assembly 120 and the strip panel 240. The strip panel 240 is bent along its length to form bent portions 241. The two ends of the bent portions 241 abut between two laterally protruding lugs 129 on the first endplate body 121 and the second endplate body 261, respectively, thereby improving the structural strength of the strip panel 240 after assembly with the first endplate assembly 120 and the second endplate assembly 260.

[0095] Combination Figure 9As shown, the third through hole 44 passes through the through holes (not shown) respectively provided at the end of the strip panel 240 near the first end plate assembly 120 using the locking member 128, and makes the bent portion 43 fit against the upper surface of the strip panel 240, thereby fixing the first end plate assembly 40 and one end of the strip panel 240. The through holes (not shown) respectively provided at the two ends of the strip panel 240 extending longitudinally along its length direction are adapted to the position of the third through hole 44. It should be noted that the embodiment in which the first end plate assembly 120, the second end plate assembly 260 and the strip panel 240 are all locked by the locking member 128 can also be modified to be fixed by welding. The first end plate body 121 and the second end plate body 261 at both ends of the strip panel 240 remain parallel and are located on the same side of the strip panel 240. The first post 251 and the first end plate body 121 can be fixed by welding. The mounting base 244 passes through the fixing strap 31 and is movably inserted into the flexible thermal insulation strip 243. A screw or other locking device (not shown) continuously passes through the second through hole 11 and the first through hole 21 to directly fix the mounting base 244 to the strip panel 240, and indirectly fixes the flexible thermal insulation strip 243 through the mounting base 244. The mounting base 244 and the flexible thermal insulation strip 243 are integrally assembled in the strip area between the first end plate assembly 120 and the second end plate assembly 260. By unscrewing the aforementioned screws, the mounting base 244 and the flexible thermal insulation strip 243 can be quickly replaced as a whole.

[0096] Optionally, the mounting base plate 244, the first end plate assembly 120, the second end plate assembly 260, and the strip panel 240 are all made of sheet metal through bending and stamping, resulting in low manufacturing costs. Furthermore, they do not require high-precision machining processes and equipment such as five-axis machining centers, thus helping to reduce the manufacturing costs of the hot box door 200, the hot box 1000 in subsequent embodiments, and the false-twist deformation machine 10000 in subsequent embodiments. The second column 252 is fixedly connected to the first end plate assembly 120 of the hot box 1000 by welding or bolts. Figure 7 and Figure 15 As shown, the two free ends of the spring 253 are respectively sleeved on the first column 251 and the second column 252. When the hot box door 200 is closed, the spring 253 pulls the hot box door 200 tight, keeping the hot box door 200 closed at the strip opening 422 to form a pre-tightening force in the closed state. When the hot box door 200 is opened and the strip opening 422 is exposed, the spring 253 can also form a pre-tightening force in the open state to ensure the stability of the hot box door 200 in the open state.

[0097] The first end plate assembly 120 further includes a first upright post 251 perpendicularly protruding from the first end plate body 121. The hot box 1000 extends longitudinally along the length direction of the strip-shaped opening 422 and is located at the end of the first end plate assembly 120 where a second upright post 252 protrudes. The first upright post 251 and the second upright post 252 are connected by a spring 253 so that the spring 253 applies a pre-tightening tension to the hot box door 200. Therefore, in any state where the hot box door 200 closes or opens the strip-shaped opening 422, the aforementioned pre-tightening tension applied by the spring 253 to the hot box door 200 always exists. The second upright post 252 and the first upright post 251 are connected by the spring 253, and the second upright post 252 is offset relative to the strip-shaped opening 422. The first upright post 251 and the second upright post 252 can be arranged at the end with a higher position in the usage state of the false twisting machine 1000. At this time, one end can be the end where the yarn outlet 76 is located, or the end where the yarn inlet 75 is located. The hot box 1000 includes a front cover plate 201 forming the strip-shaped opening 422, and the front cover plate 201 is provided with a limiting component 208 parallel to the strip-shaped opening 422. The limiting component 208 includes: a mounting plate 2083 fixedly connected to the front cover plate 201, a bending plate 2082 integrally formed with the mounting plate 2083, and an abutting plate 2081 formed at the end of the bending plate 2082. After the hot box door 200 rotates to expose the strip-shaped opening 422, its rotation is restricted by the abutting plate 208. The hot box door 200 is pivotally connected to the front cover plate 201 to form a pivot axis 5. When the hot box door 200 exposes the strip-shaped opening 422 and is abutted by the abutting plate 2081, the pivot axis 5 deviates from the side of the spring 253 close to the strip-shaped opening 422, and the direction 219 of the pre-tightening tension formed by the spring 253 intersects with the abutting surface 218, and the abutting surface 218 is formed by the strip-shaped panel 240 and the abutting plate 2081 being in contact with each other.

[0098] As shown Figure 15 in the figure, when the hot box door 200 is in the closed state, a triangle is formed among the direction 254 of the pre-tightening tension applied by the spring 253, the connecting line 256 between the first upright post 251 and the pivot axis 5, and the connecting line 257 between the second upright post 252 and the pivot axis 5, which is beneficial to ensuring the stability of the hot box door 200 in the closed state. As shown Figure 7As shown, when the hot box door 200a in the fully open state exposes the strip-shaped opening 422, the flexible heat insulation strip 243 on the back of the hot box door separates from the heat insulation cavity 401; when the hot box door 200c in the fully closed state closes the strip-shaped opening 422, the flexible heat insulation strip 243 on the back of the hot box door 200c completely fills the heat insulation cavity 401. When the hot box door 200a in the fully open state exposes the strip-shaped opening 422 and is held by the limiting component 208, the direction 219 formed by the connection line 255 between the first upright post 251 and the second upright post 252 intersects with the holding surface 218 and forms an included angle θ, and the angle of the included angle θ can be set arbitrarily. For example, the included angle θ can be 10°, 13°, 16° or 20°, etc. In this embodiment, since the pivot shaft 5 deviates from the side of the spring 253 close to the strip-shaped opening 422, the connection line 258 between the pivot shaft 5 and the first upright post 251, the connection line 259 between the pivot shaft 5 and the second upright post 252, and the connection line 255 between the first upright post 251 and the second upright post 252 jointly form a triangle, which is beneficial to ensuring that the hot box door 200 has good stability in the open state and avoiding the hot box door 200 accidentally closing the strip-shaped opening 422 due to slight vibration or misoperation during the operation of the false twisting machine.

[0099] As shown, the length of the limiting component 208 is equal to or less than the length of the hot box door 200. As an optional way, the number of the limiting components 208 can also be multiple, and they are arranged in a straight line as a whole and fixed on the front cover plate 201, and are located on the same side of the strip-shaped opening 422. The fixing method between the limiting component 208 and the front cover plate 201 includes but is not limited to fixing with screws, fixing with rivets or other fixing methods. By introducing the limiting component 208, when the hot box door 200 rotates relative to the front cover plate 201, a relatively definite open posture and rotation angle are formed, so that the strip-shaped panel 240 included in the hot box door 200 abuts against the abutting plate 2081. The included angle between the abutting surface 218 formed by the fitting of the strip-shaped panel 240 and the abutting plate 2081 and the plane of the front cover plate 201 can be 60° to 45°, for example, it can be 45°, 48°, 50°, 55°, 58°, 60°, etc., so as to fully expose the strip-shaped opening 422 and the flexible heat insulation strip 243, facilitating the cleaning operation of the hot rail 403 and the flexible heat insulation strip 243. At the same time, under the combined action of the pre-tightening tension applied by the spring 253 to the hot box door 200, it is beneficial to keep the hot box door 200 in the open state, avoid accidental closing when the hot box door 200 is in the open state, and can avoid excessive rotation of the hot box door 200, avoiding the impact of the hot box door 200 on the front cover plate 201.

[0100] ​​The heating chamber door 200 is used to open or close the strip opening 422. When the strip opening 422 is closed, heat from the surface of the heating rail 403 is stored in the heating chamber 402. When the yarn passes through the heating chamber 1000 along the yarn transport path 7, the yarn adheres to the surface of the heating rail 403 and is heated. The surface of the heating rail 403 has a certain curvature to facilitate the adherence of the yarn to the surface of the heating rail 403. The bottom of the insulation chamber 401 forms another strip opening 406 that connects to the heating chamber 402, and the width of the strip opening 406 is much smaller than the width of the strip opening 422. The volume of the heating chamber 402 is much smaller than the volume of the insulation chamber 401 to facilitate the concentration of heat in the heating chamber 402. Figure 8 The height H3 formed between the middle strip opening 422 and the strip opening 406 is less than Figure 10 The thickness H4 of the flexible thermal insulation strip 243 that has not undergone overall compression deformation.

[0101] The heating box 1000 forms at least one insulated cavity 40, which includes an insulation cavity 401 near the front cover 201 and a heating cavity 402 located at the bottom of the insulation cavity 401. A strip-shaped opening 422 exposes the insulation cavity 40. The cross-sectional profile of the insulation cavity 401 along its length is adapted to the cross-sectional profile of the flexible insulation strip 243 along its length. It should be noted that, for example... Figure 8 The strip opening 422 shown can be tilted towards the ground 4 in actual use. When the heat chamber door 200 closes the strip opening 422, the flexible heat insulation strip 243 is at least completely in contact with the two sidewalls 411 formed by the heat insulation cavity 401, so that the flexible heat insulation strip 243 applies a compressive force f1 to the sidewalls 411. The width W1 of the flexible heat insulation strip 243 on the side closer to the strip panel 240 is greater than or equal to the width W2 of the strip opening 422, and the width W3 of the flexible heat insulation strip 243 on the side away from the strip panel 240 is greater than or equal to the width W4 of the bottom of the heat insulation cavity 401. Two symmetrically arranged stepped portions 413 are formed at the bottom of the heat insulation cavity 401 by the fixing components 412. When the heat chamber door 200 closes the strip opening 422, the flexible heat insulation strip 243 applies a compressive force f1 to the sidewalls 411 and simultaneously applies a compressive force f2 to the stepped portions 413. Through the aforementioned extrusion force f1 and extrusion force f2, the flexible heat insulation strip 243 undergoes overall compression deformation along its cross-section, so that the flexible heat insulation strip 243 completely fills the heat insulation cavity 401, effectively preventing heat from escaping from the strip opening 422 to the external space of the heat box 1000.

[0102] As an optional approach, combined Figure 5As shown, when the hot box door 200 closes the strip-shaped opening 422, the flexible heat insulation strip 243 completely fills the heat insulation cavity 401 to prevent the heat generated by the hot rail 403 in the heating cavity 402 from escaping to the external space of the hot box 1000. During the process of the flexible heat insulation strip 243 completely filling the heat insulation cavity 401, that is, during the closing process of the hot box door 200 completely closing the strip-shaped opening 422, the flexible heat insulation strip 243 undergoes an overall compressive deformation, so that the two inclined surfaces 2434 of the flexible heat insulation strip 243 and the plane with a width of W3 are simultaneously compressed inward, effectively preventing the heat in the heating cavity 402 from escaping to the external space of the hot box 1000. It should be noted that during the closing process of the flexible heat insulation strip 243 of the hot box door 200 completely closing the strip-shaped opening 422, only the two inclined surfaces 2434 of the flexible heat insulation strip 243 may be simultaneously compressed inward. At this time, the plane with a width of W3 may contact the step portion 413 without generating an extrusion force f2. At this time, the flexible heat insulation strip 243 also completely fills the heat insulation cavity 401, or the plane with a width of W3 may not contact the step portion 413. At this time, the flexible heat insulation strip 243 partially fills the heat insulation cavity 401. The foregoing embodiments can all achieve the purpose of this application.

[0103] As shown Figure 10 When the flexible heat insulation strip 243 undergoes an overall compressive deformation along its cross-section, two inclined surfaces 2434 form extrusion forces f4 and f5 as shown in Figure 10 , and the bottom surface 2435 of the flexible heat insulation strip 243 with a width of W3 forms an extrusion force f6 as shown in Figure 10 . The extrusion forces f4, f5, and f6 all point to the inner center 2433 of the flexible heat insulation strip 243. When the hot box door 200 closes the strip-shaped opening 422 through the flexible heat insulation strip 243, the flexible heat insulation strip 243 completely adheres to the two side walls 303 and the step portion 413 formed by the heat insulation cavity 401, and when the flexible heat insulation strip 243 completely fills the heat insulation cavity 401, extrusion forces f1 and f2 are applied to the side wall 411 and the step portion 413 through the flexible heat insulation strip 243. The side wall 411 is inclined and completely adheres to the flexible heat insulation strip 243.

[0104] As another alternative, the thickness H4 of the flexible heat insulation strip 243 in the Figure 10 perspective can also be less than Figure 8The height H4 formed by the middle heat insulation cavity 401 is such that the flexible heat insulation strip 243 only fully adheres to the two side walls 411 of the heat insulation cavity 401 and can be in a non-contact state with the step portion 413. At this time, the flexible heat insulation strip 243 partially fills the heat insulation cavity 401. As an optional manner, the built-in heat insulation layer 2432 is fiberglass heat insulation cotton or rock wool. The protective layer 2431 is a silica gel cloth, a polytetrafluoroethylene cloth or a fiberglass cloth, and the thickness of the protective layer 2431 is 0.5 mm to 3 mm. For example, the thickness of the protective layer 2431 can be 0.5 mm, 1 mm, 2 mm or 3 mm. Since the oil fume generated by the yarn at a high temperature state (for example, 185 °C, 190 °C or a higher temperature) will adhere to the inner surface of the hot box door 200, the inner surface is disposed opposite to the heating cavity 402. By introducing the protective layer 2431, the built-in heat insulation layer 2432 can be effectively wrapped. In addition, the built-in heat insulation layer 2432 is formed by integral cutting and forms an integral heat insulation structure to ensure the same width and thickness along the length direction, so as to ensure that when the hot box door 200 closes the strip-shaped opening 422 and completely fills the heat insulation cavity 401, the flexible heat insulation strip 243 simultaneously applies a squeezing force f1 and a squeezing force f2 to the side wall 411 of the heat insulation cavity 401 and the step portion 413 respectively. Or, the flexible heat insulation strip 243 only applies a squeezing force f1 to the side wall 303 of the heat insulation cavity 401, thereby ensuring that the flexible heat insulation strip 243 does not collapse after long-term use in a high-temperature environment and avoiding the reduction of the heat insulation performance of the hot box door 200. Further preferably, the squeezing force f1 applied by the flexible heat insulation strip 243 to the side wall 411 of the heat insulation cavity 401 and the squeezing force f2 applied to the step portion 413 are substantially the same along the length direction of the flexible heat insulation strip 243. The volume of the flexible heat insulation strip 243 is greater than or equal to the volume of the heat insulation cavity 401, and it is further preferably that the volume of the flexible heat insulation strip 243 is greater than the volume of the heat insulation cavity 401. At the same time, the protective layer 2431 made of a high-temperature resistant fabric such as a silica gel cloth or a fiberglass cloth has a poor adhesion force between the protective layer 2431 and the oil fume, so as to meet the purpose and effect of being easy to clean the flexible heat insulation strip 243. At the same time, since the mounting substrate 244 can provide support for the flexible heat insulation strip 243 which is soft, the mounting substrate 244 is substantially parallel to the strip-shaped panel 240. The mounting substrate 244 and the strip-shaped panel 240 can be adhesively disposed, or can be further disposed between the mounting substrate 244 and the strip-shaped panel 240 through a heat insulation member (not shown) to further prevent heat loss. The heat insulation member can be made of a heat insulation material with a low thermal conductivity such as fiberglass heat insulation cotton or high-temperature resistant rubber having a thin-wall structure.

[0105] Refer to Figures 1 to 15 An embodiment of the hot box 1000 shown.

[0106] In this embodiment, the hot box 1000 includes: a box body 1001, a heat insulation structure 81 filled inside the box body 1001, and a hot box door 200 as described in any one of the foregoing embodiments. The heat insulation structure 81 is configured to have a heat insulation cavity 40 extending along the yarn conveying path 7. The box body 1001 includes a front cover plate 201, and the front cover plate 201 forms a strip-shaped opening 422 exposing the heat insulation cavity 40. The heat insulation cavity 40 includes a heat insulation chamber 401 close to the front cover plate 201, and a heating chamber 402 located at the bottom of the heat insulation chamber 401. A hot rail 403 for heating the yarn is provided at the bottom of the heating chamber 402. The hot box door 200 is pivotally connected to the front cover plate 201 to actively open and close the strip-shaped opening 422. When the hot box door 200 closes the strip-shaped opening 422 and its edge 223 is pressed by a rotating pressing member (for example, an eccentric pressing wheel 202), the flexible heat insulation strip 243 is compressed and deformed and then extruded into the heat insulation chamber 401, so that the hot box door 200 rotates to form a closed state surface 220. Therefore, in the embodiments of the present application, the front cover plate 201 is not absolutely required to be parallel to the closed state surface 220 formed by the hot box door 200 completely closing the strip-shaped opening 422. The front cover plates 201 on both sides of the strip-shaped opening 422 respectively extend towards the heat insulation chamber 401 and are fitted to the folded edge portion 2011 of the first heat insulation layer 811. The number of hot box doors 200 depends on the number of strip-shaped openings 422.

[0107] Refer Figure 1 、 Figure 7 And Figure 9 As shown, the hot box door 200 as a whole forms a pivot axis 5 for pivotal connection with the front cover plate 201 through a hinge 2020. One blade 2023 included in the hinge 2020 is fixed to the front cover plate 201, and the other blade 2021 extends into the hot box door 200 and is fixed to the hot box door 200. The strip-shaped panel 240 is provided with a plurality of through holes 246, and the front cover plate 201 also forms a plurality of through holes (not shown). A locking member (for example, a screw or a rivet) is screwed into the through hole 14 and fixed to the blade 2021, and a locking member is screwed into the plurality of through holes formed in the front cover plate 201 and fixed to the blade 2023.

[0108] Combined Figure 2 As shown, the box body 1001 includes a plurality of front cover plates 201 and a plurality of hot box doors 200 that are located on the front panel 20 and are arranged in parallel at intervals. The front cover plates 201 and the hot box doors 200 are inclined towards the ground 4 in the use state of the hot box 1000. The turning handle 11 and the pressing handle 21 both extend obliquely downward and reach a position height convenient for an operator to reach. In Figure 1From this perspective, the enclosure 1001 also includes a first end plate 10 and a second end plate 50 facing each other, a first side plate 31 and a second side plate 32 facing each other, and a front panel 20 and a back panel 60 facing each other, together forming a three-dimensional structure that is close to a flat cuboid. The enclosure 1001 has multiple internal heat rails 403. The front panel 20 consists of a front cover plate 201 and a heat box door 200 arranged at continuous intervals. Along... Figure 2 The viewpoint corresponding to the direction of the middle arrow F forms Figure 1 The heating box in the middle is 1000.

[0109] Multiple hot box doors 200 and multiple front cover plates 201 are arranged alternately to form the front panel 20. When the hot box door 200 is fully closed at the strip opening 422, the surface of the hot box door 200 protrudes from the surface of the front cover plate 201. A folding plate 140 is formed on the back side of the first end plate 10, which is reliably assembled to the back panel 60 by locking devices or welding. Figure 1 and Figure 30 , Figure 31 As shown, exhaust holes 130 and 150 are respectively provided at the bottom of both ends of the strip-shaped opening 422. An exhaust pipe 1110 connecting the exhaust holes 130 and 150 can be provided at one or both ends of the back panel 60 of the heating chamber. An extraction device is connected to the exhaust pipe 1110 via a pipe (not shown). This extraction device (not shown) is used to discharge the oil fumes generated in the heating chamber 402 during the heating of the yarn by the heating rail 403, thus preventing contamination of the yarn.

[0110] Optionally, the heating box 1000 can be a biphenyl heating box, with a hollow structure 613 formed inside the heating rail 403. Biphenyl vapor formed by heating liquid biphenyl enters the hollow heating rail 403, where the biphenyl vapor liquefies and releases heat to heat the heating rail 403. The liquefied and cooled biphenyl is then recirculated and reheated. Since the heating rail 403 is existing technology included in the heating box 1000, and is well known to those skilled in the art, it is not specifically shown or described in detail in this embodiment. Optionally, the heating rail 403 can be configured as a single-channel, dual-channel, triple-channel, or more channels. Figure 1The dashed line 71 and the dashed line 72 are intended to respectively represent a yarn conveying path 7. As an alternative, each hot box 1000 may be provided with six hot rails 403, and six hot box doors 200 may be correspondingly provided, and twelve yarns can be processed simultaneously. It should be noted that the hot box 1000 may also be configured as a hot box based on the principle of electric heating. As an alternative, the interior of the box body 1001 is filled with a heat insulation structure 81 composed of one kind of heat insulation material (for example, the first heat insulation layer 811 or the second heat insulation layer 812) or filled with two kinds of heat insulation materials (for example, the first heat insulation layer 811 and the second heat insulation layer 812) to prevent heat from escaping from the bottom and side of the hot rail 403 to the external space of the box body 1001.

[0111] In this embodiment, the hot box 1000 can be used for heating treatment before false twist texturing of polyester, polypropylene, spandex, polyamide or composite filaments. Combining Figure 8 As shown, a hot box 1000 in this embodiment further includes a fixing component 412. The fixing component 412 is strip-shaped and located inside the box body 1001. The fixing component 412 is arranged in parallel with the strip-shaped opening 422. The fixing component 412 is used to maintain the relative positions of the first heat insulation layer 811 and the second heat insulation layer 812. The fixing component 412 is separated from the front cover plate 201 to partially expose the second heat insulation layer 812. The two ends of the fixing component 412 form bending parts (not shown) respectively located at both ends of the strip-shaped opening 422 of the hot box 1001, so as to establish a reliable connection with the first end plate 10 and the second end plate 50 through fasteners by means of the bending parts. The fixing component 412 does not contact the flanging part 2011 to prevent the heat in the heating cavity 402 from being transferred to the front cover plate 201, further improving the heat insulation effect. A step part 413 is formed on the top of the fixing component 412 facing the strip-shaped opening 422. As another alternative embodiment, the heat insulation structure 81 may also only adopt the first heat insulation layer 811 or only adopt the second heat insulation layer 812. As another alternative, a 1 mm to 5 mm nano-reflective heat insulation coating is coated on the surface of the first heat insulation layer 811, and at least the inner surface of the heating cavity 402 of the second heat insulation layer 811 is coated with a 1 mm to 5 mm waterproof and oil-proof coating and thus used as a hydrophobic layer to prevent the cleaning liquid from infiltrating into the second heat insulation layer 812 during the cleaning process of the heating cavity 402.

[0112] Based on the foregoing hot box door locking mechanism and the technical solutions included in multiple specific embodiments such as the hot box 1000 including the hot box door locking mechanism, the present application also discloses several embodiments of a false twist texturing machine, specifically referring to Figures 30 to 32 as shown.

[0113] Refer to Figure 30 An embodiment of the corresponding false twist texturing machine 10000.

[0114] In this embodiment, the false-twist texturing machine 10000 includes a main frame 90 and a processing assembly disposed on the main frame 90. An operating channel 900 is formed on the inner side of the main frame 90. The processing assembly includes: a heating box 1000, a cooling device 2000, a false-twist device 500, a conveying device 400, and a winding device 600, as described in the previous embodiment. The heating box 1000 and the cooling device 2000 are both inclinedly disposed above the operating channel 900. Figure 30 All structures to the right of the central dashed line 940 can be mirrored along the central dashed line 940.

[0115] like Figure 30 As shown, the length of the heating box 1000 included in the false twist texturer 1000 can be 1.2 meters to 1.5 meters, for example, 1.3 meters, 1.4 meters, etc. The longer the heating box 1000, the smaller its tilt angle relative to the ground 4 can be. For example, for a heating box 1000 with a length of 1.3 meters, the angle between the plane containing the heating box 1000 and the ground 4 is X1, which is 25°, thus helping to reduce the overall height of the false twist texturer 10000. The yarn inlet 75 is located below the heating box 1000, and the yarn outlet 76 is located above the heating box 1000, with the height of the yarn inlet 75 lower than the height of the yarn outlet 76. The false twist texturer 10000 in this embodiment can adopt... Figure 1 The heating box 1000 is included. As a reasonable variation, the holding handle 21 can be configured not to extend beyond the end of the strip opening 422, which is considered the end of the yarn inlet 75, while the flip handle 11 extends slightly beyond the end of the strip opening 422, which is also considered the end of the yarn inlet 75. This ensures that neither the flip handle 11 nor the holding handle 21 interferes with the column 910 and the high-speed moving yarn in the yarn conveying path 7, thus providing the necessary operating space. Therefore, the flip handle 11 and the holding handle 21 provided in the heating box 1000 in the various embodiments of this application are not required to be flush.

[0116] Figure 30 Yarn transport paths 71, 73, and 74 all belong to Figure 2This is a portion of the yarn transport path 7 shown. The false twist texturer 1000 includes a heating chamber 1000 for heating the yarn passing through the heating chamber 1000 to a set texture temperature (e.g., 185°C, 190°C, or higher) for false twist texture processing performed by the false twist device 500. The main frame 90 includes columns 910, a crossbeam 920, and a central frame 930. The crossbeam 920 is provided with vertically upward support columns 921, and a guide ceramic element 922 is provided at the top of the support column 921. After being heated in the heating chamber 1000, the yarn is guided by the guide ceramic element 922 and sent to the cooling device 2000 to be cooled to the temperature required for false twist texture processing. After being heated in the heating chamber 1000, the yarn is cooled by passing through a cold rail (i.e., a lower concept of the cooling device 2000) and then conveyed to the false twist device 500 for false twist texture processing. The conveying device 400 can be a clamping conveying device or a winding conveying device. The technical solutions that have the same parts as the false twisting machine 10000 in this embodiment and the hot box 1000 in the previous embodiments, as well as the technical solutions that have the same parts as the hot box door 200 in the previous embodiments and the hot box door locking mechanism in the embodiments included in the hot box 1000, are shown in the previous embodiments and will not be repeated here.

[0117] The false-twist texturing machine 10000 has two conveying devices 400 in each yarn conveying path 7: a first conveying mechanism 410 and a second conveying mechanism 420, for a total of two conveying devices 400. Alternatively, the false-twist texturing machine 10000 has three conveying devices 400 in each yarn conveying path 7: a first conveying mechanism 410, a second conveying mechanism 420, and a third conveying mechanism 430. The first conveying mechanism 410 and the second conveying mechanism 420 form a combined texturing / stretching zone, and the second conveying mechanism 420 and the third conveying mechanism 430, located before the winding device 600, form a post-processing zone. Optionally, the first conveying mechanism 410 is a winding conveying mechanism, and the second and third conveying mechanisms are clamping conveying mechanisms. Optionally, the first conveying mechanism 410 and the second conveying mechanism 420 can also be winding conveying mechanisms, while the third conveying mechanism 340 is a clamping conveying mechanism.

[0118] The untreated yarn is drawn from the yarn spindle 820 of the yarn creel 80 through the yarn feeding tube 810 to the tensioning device 830, maintained at a certain tension, and further conveyed to the first conveying mechanism 410. The yarn is sequentially fed into the hot box 1000, the cooling device 2000, the false twist device 500, the shaping hot box 1100, and after the third conveying mechanism 430, it is finally conveyed to the winding device 600 through the oiling device 620 for winding treatment. The winding device 600 winds the yarn after being drawn, stretched, heated, cooled, false twist deformed, and shaped to form high elastic yarn to form the treated yarn spindle 610. The false twist texturing machine 10000 for texturing polyester is provided with the aforementioned first conveying mechanism 410, the second conveying mechanism 420, and the third conveying mechanism 430 at the same time. The false twist texturing machine 10000 for texturing nylon can be provided with only the first conveying mechanism 410 and the second conveying mechanism 420, and the configuration of the aforementioned shaping hot box 1100 and the third conveying mechanism 430 can be omitted. Components such as the shaping hot box 1100 and the false twist device 500 are arranged on the central frame 930. On the other side of the central frame 930, components shown on the right side of the central frame 930 as shown in Figure 30 are mirror-distributed along the dotted line 940. The hot box 1000 is arranged in the yarn conveying path 7 between the first conveying mechanism 410 and the cooling device 2000. One end of the hot box 1000 for the yarn to enter is the yarn inlet 75, and one end of the hot box 1000 for the yarn to pass through is the yarn outlet 76. The height of the yarn inlet 75 is lower than the height of the yarn outlet 76. The included angle between the hot box 1000 and the horizontal plane is greater than or equal to 20° and less than or equal to 45°, such as any integer angle or non-integer angle like 20°, 25°, 32°, 38°, 42°, 45°, etc. Figure 30 The hot box 1000 in

[0119] refers to Figure 31 another embodiment of the corresponding false twist texturing machine 10000a.

[0120] Compared with the aforementioned embodiment, the main difference in this embodiment is that the false twist texturing machine 10000a is a V-type false twist texturing machine. The V-type false twist texturing machine means that the yarn conveying path 7 formed by the (texturing) hot box 1000a and the cooling device 2000 is substantially a straight line, the cooling device 2000 points to the central frame 930, and the (texturing) hot box 1000a and the cooling device 2000 are mirror-distributed along the dotted line 940 on both sides of the central frame 930. Since the overall structure is similar to the letter "V", it is thus abbreviated as "V-type false twist texturing machine" in the industry. It should be noted that the false twist texturing machine 10000a also includes a yarn creel 80 similar to Figure 30 . The yarn inlet 75 is located above the hot box 1000a, and the yarn outlet 76 is located below the hot box 1000a. The height of the yarn inlet 75 is higher than the height of the yarn outlet 76. Figure 31 The creel 80 is omitted from the illustration.

[0121] The yarn to be processed passes through the first conveying mechanism 410, the wire threading device 800, the heating box 1000a, the cooling device 2000, the false twist device 500, the second conveying mechanism 420, the shaping heating box 1100, and the third conveying mechanism 430 in sequence along the yarn conveying path 7. After passing through the oiling device 620, it is finally conveyed to the winding device 600 for winding. Since the heating box 1000a included in the false twist texturing machine 10000a is usually long, the heating box door locking mechanism provided on the working surface facing the ground 4 includes three pressing mechanisms 100. The pressing handle 21 and the flipping handle 11 extend obliquely downward. The operator stands on the operation trolley 700 and can perform the flipping operation and the pressing operation on the heating box door 200. In this embodiment, the end of the pressing handle 21 and the flipping handle 11 extending past one end of the strip-shaped opening 422 is regarded as the yarn outlet 76. For the V-type false twist texturing machine configured with the heating box 1000a in each embodiment of the present application, both the flipping handle 11 and the pressing handle 21 extend obliquely downward and the distance between their ends and the ground 4 is about 2.6 meters. The operator can use the operation trolley 700 to perform the flipping operation and the pressing operation on the heating box door 200.

[0122] In the prior art, the false twist texturing machine only forms a pre-tightening tension through a spring, so it cannot provide sufficient pressing force f3 for the flexible heat insulation strip 243 provided on the back of the heating box door 200. At the same time, since the distance between the wire threading devices 800 in the adjacent wire conveying paths 7 of the false twist texturing machine 10000a is only 10 - 11 cm, it is not practical for the operator to climb onto the working platform (not shown) at the top of the main frame 90 to perform manual pressing, and it will also make the operation of closing the heating box door 200 to form the closed state surface 220 in each embodiment of the present application extremely cumbersome. Since other layout methods of the V-type false twist texturing machine belong to the prior art, they will not be elaborated in this embodiment. The V-type false twist texturing machine in this embodiment can also omit the configuration of the third conveying mechanism 430 and the shaping heating box 1100. Figure 31 The heating box 1000a in [description] includes the heating box door locking mechanism described in any of the foregoing embodiments.

[0123] Refer Figure 32 Another embodiment of the corresponding false twist texturing machine 10000b.

[0124] Compared to the aforementioned embodiments, the main difference in this embodiment is that the false-twist texturing machine 10000b is an M-type false-twist texturing machine. An M-type false-twist texturing machine refers to a machine where the yarn transport path 7 formed by the (texturing) heating box 1000b and the cooling device 2000 is not a straight line. The yarn is transported to the cooling device 2000 after its transport direction is changed at a large angle by the guide ceramic component. The cooling device 2000 points towards the central frame 930, and the (texturing) heating box 1000b and the cooling device 2000 are mirror-distributed along the dotted line 940 on both sides of the central frame 930. Because the overall structure resembles the letter "M," it is referred to in the industry as an "M-type false-twist texturing machine." It should be noted that the false-twist texturing machine 10000a also includes similar components. Figure 30 The yarn rack 80 is located in the middle. The yarn inlet 75 is located below the heating box 1000b, and the yarn outlet 76 is located above the heating box 1000b. The height of the yarn inlet 75 is lower than the height of the yarn outlet 76. Figure 32 The yarn rack 80 is omitted from the diagram.

[0125] The yarn to be processed passes sequentially along the yarn conveying path 7 through the first conveying mechanism 410, the threading device 800, the heating box 1000b, the cooling device 2000, the false twisting device 500, the second conveying mechanism 420, the shaping heating box 1100, and the third conveying mechanism 430. After passing through the oiling device 620, it is finally conveyed to the winding device 600 for winding. The heating box door locking mechanism on the working surface of the false twist texturer 10000b facing the ground 4 includes two pressing mechanisms 100, with the pressing handle 21 and the flipping handle 11 extending downwards at an angle. In this embodiment, the heating box 1000b may also be provided with three heating box door locking mechanisms. The end of the pressing handle 21 and the flipping handle 11 extending through the strip opening 422 is considered as the yarn inlet 75. The yarn inlet 75 of the heating chamber 1000b of the M-type false twist texturer is typically 2-2.4 meters high. Therefore, by lengthening the holding handle 21 and the flipping handle 11, the operator can directly stand on the ground 4 and touch the holding handle 21 and the flipping handle 11 to perform flipping and pressing operations on the heating chamber door 200. In this embodiment, the M-type false twist texturer can also omit the third conveying mechanism 430 and the shaping heating chamber 1100. Since other layouts of the M-type false twist texturer are existing technologies, they will not be described in detail in this embodiment. Figure 32 The heating box 1000b includes the heating box door locking mechanism described in any of the foregoing embodiments.

[0126] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heating box, characterized in that, include: A housing, an insulation structure filled inside the housing, the insulation structure being configured to form a plurality of insulation cavities extending along the yarn conveying path, the housing including a front cover plate forming a plurality of strip openings that movably expose the insulation cavities, and a hot box door; The heat insulation cavity includes a heat insulation cavity near the front cover and a heating cavity at the bottom of the heat insulation cavity. A heat rail is provided at the bottom of the heating cavity. The hot box door is pivotally connected to the front cover to movably open and close the strip opening. The hot box door is provided with a flexible heat insulation strip that movably opens and closes the strip opening, a hot box door rotation mechanism, and a hot box door locking mechanism. The hot box door locking mechanism is located on the front cover plate of the hot box, which forms a strip opening; The hot box door locking mechanism includes: at least one pressing mechanism, a transmission shaft for driving the pressing mechanism to rotate, and a pressing handle for driving the transmission shaft to rotate; the pressing mechanism includes a rotating pressing member and a retaining assembly, the transmission shaft passes through the retaining assembly and connects to the rotating pressing member, the rotating pressing member rotates to form a first shaft, and the hot box door rotation mechanism drives the hot box door to rotate to form a second shaft, the first shaft and the second shaft are arranged parallel to each other and are respectively formed on both sides of the strip-shaped opening, during the process of the transmission shaft driving the rotating pressing member to rotate, the rotating pressing member and the hot box door change from being separated to being in contact with each other, so as to force the hot box door to rotate to the closed state surface.

2. The heating box according to claim 1, characterized in that, The hot box door includes: a strip panel, a first end plate assembly and a second end plate assembly disposed on the strip panel extending longitudinally to its end along its length, a mounting base plate, and the flexible heat insulation strip being detachably connected to the mounting base plate.

3. The heating box according to claim 2, characterized in that, The hot box door rotation mechanism includes: a flip handle, a drive rod that is offset outside the strip opening and inserted into the second end plate assembly, the flip handle and the drive rod being longitudinally movably connected along the second axis, the flip handle extending through one end of the strip opening, the flip handle driving the hot box door to pivot along the second axis, and both the flip handle and the holding handle extending downward at an angle.

4. The heating box according to claim 2, characterized in that, The flexible thermal insulation strip includes a built-in insulation layer and a protective layer that completely covers the built-in insulation layer. The protective layer is movably inserted into the mounting base plate, and the mounting base plate is detachably connected to the strip panel. The protective layer forms several fixing strips on one side of the mounting substrate, through which the mounting substrate continuously passes along the longitudinal extension direction of the flexible heat insulation strip.

5. The heating box according to claim 2, characterized in that, The first end plate assembly includes a first end plate body, and the second end plate assembly includes a second end plate body. The opposing inner surfaces of the first end plate body and the second end plate body are respectively provided with abutting blocks. The abutting blocks abut against the two ends of the flexible heat insulation strip to form gaps between the two ends of the flexible heat insulation strip extending longitudinally along its length direction and the first end plate body and the second end plate body, respectively.

6. The heating box according to claim 2, characterized in that, The front cover is provided with a limiting component that is parallel to the strip opening; the limiting component includes: a mounting plate fixedly connected to the front cover, a bent plate forming an integral structure with the mounting plate, and an abutment plate formed at the end of the bent plate. After the hot box door rotates and exposes the strip opening, it is restricted from rotating by the abutment plate.

7. The heating box according to claim 2, characterized in that, The cross-sectional profile of the insulation cavity along its length is adapted to the cross-sectional profile of the flexible insulation strip along its length; when the hot box door closes the strip opening, the flexible insulation strip at least completely adheres to the two sidewalls formed by the insulation cavity, so that the flexible insulation strip applies a compressive force to the sidewalls at least.

8. The heating box according to claim 7, characterized in that, The width of the flexible heat insulation strip on the side closest to the strip panel is greater than or equal to the width of the strip opening, and the width of the flexible heat insulation strip on the side furthest from the strip panel is greater than or equal to the width of the bottom of the heat insulation cavity. A step is formed at the bottom of the heat insulation cavity. When the heat box door closes the strip opening, the flexible heat insulation strip simultaneously applies a compressive force to the side wall and the step.

9. The heating box according to claim 6, characterized in that, The first end plate assembly further includes a first column, which is vertically protruding from the first end plate body. The hot box extends longitudinally along the length of the strip opening and a second column protrudes from the end of the first end plate assembly. The first column and the second column are connected by a spring so that the spring applies a pre-tightening force to the hot box door. The hot box door is pivotally connected to the front cover to form a pivot axis. When the hot box door exposes the strip opening and is held by the abutment plate, the pivot axis is deviated from the side of the spring near the strip opening, and the direction of the pre-tension force formed by the spring intersects with the abutment surface, wherein the abutment surface is formed by the strip panel and the abutment plate being attached together.

10. The heating box according to claim 1, characterized in that, During the process of the drive shaft driving the rotating holding member to rotate, the rotating holding member and the hot box door change from being separated to being in contact with each other, so that the rotating holding member applies a holding force to at least the edge of the hot box door, so as to force the hot box door to rotate and form a closed state surface.

11. The heating box according to claim 1, characterized in that, The hot box door locking mechanism includes at least two rotating holding members that are synchronously rotated by the drive shaft. The rotating holding members are separated from each other along the first shaft. The drive shaft is parallel to the strip opening. The holding handle rotates synchronously to rotate the at least two rotating holding members.

12. The heating box according to claim 11, characterized in that, The rotating pressing component includes an eccentric rotating pressing block, which includes an eccentric pressing wheel or an eccentric pressing strip; The outer edge of the eccentric pressure roller forms a holding section. During the process of the drive shaft driving the eccentric pressure roller to rotate, the holding section applies a holding force to at least the edge of the hot box door to compress the hot box door to rotate and form a closed state surface, and the holding section maintains the closed state of the strip opening formed by the hot box door.

13. The heating box according to claim 12, characterized in that, The rotating holding member includes a symmetrical rotating pressing block, which rotates along the first axis. During the rotation of the symmetrical rotating pressing block driven by the transmission shaft, the rotation profile of the symmetrical rotating pressing block formed by the rotation of the symmetrical rotating pressing block and the rotation profile of the hot box door formed during the rotation of the hot box door change from being separated to overlapping. After overlapping, the symmetrical rotating pressing block applies a pressing force to the edge region of the hot box door containing the edge, thereby forming a closed state surface of the hot box door. The pressing force forms at least a vertical component perpendicular to the closed state surface.

14. The heating box according to claim 12, characterized in that, During the process of the drive shaft driving the eccentric pressure roller to rotate, the eccentric pressure roller rotation boundary formed by the eccentric pressure roller approaching the strip opening and perpendicular to the front cover plate changes from being separated to overlapping with the rotation profile of the hot box door formed during the rotation of the hot box door. After overlapping, the holding section applies a holding force to the edge area of ​​the hot box door containing the edge, which compresses the hot box door to form a closed state surface. The holding force forms at least a vertical component perpendicular to the closed state surface.

15. The heating box according to claim 14, characterized in that, The pressing section is configured with a flat edge, and the eccentric pressure roller is recessed inward to form an avoidance notch. The pressing section is formed on the inner side of the avoidance notch. During the rotation of the eccentric pressure roller, a rotating surface is formed, and the rotating surface is perpendicular to the closed state surface.

16. The heating box according to claim 14, characterized in that, The pressure handle is movably connected to the drive shaft along the first axis in a longitudinal direction. The holding handle extends beyond one end of the strip opening, or, The holding handle does not extend beyond one end of the strip opening.

17. The heating box according to claim 15, characterized in that, The clearance notch sequentially forms a first transition section, a pressing section, a second transition section, a third transition section, and a fourth transition section. The maximum rotation radius of the fourth transition section during the rotation of the eccentric pressure roller is less than the shortest distance formed by the edge of the hot box door near the hot box door locking mechanism and the first shaft when the hot box door closes the strip opening. Conversely, the maximum rotation radius of the first transition section during the rotation of the eccentric pressure roller is greater than the shortest distance. Both the first and fourth transition sections have arc-shaped profiles. Alternatively, The clearance gap sequentially forms a first transition section and a holding section. The minimum rotation radius of the holding section during the rotation of the eccentric pressure roller is less than the shortest distance formed by the edge of the hot box door near the hot box door locking mechanism and the first shaft when the hot box door closes the strip opening. The maximum rotation radius of the first transition section during the rotation of the eccentric pressure roller is greater than the shortest distance. The first transition section has an arc-shaped profile, or... The clearance notch is formed only by the holding section. The minimum rotation radius formed by the holding section during the rotation of the eccentric pressure roller is less than the shortest distance formed by the edge of the hot box door near the hot box door locking mechanism and the first shaft when the hot box door closes the strip opening. The maximum rotation radius formed by the holding section during the rotation of the eccentric pressure roller is greater than the shortest distance.

18. A false-twist texturing machine, characterized in that, include: A main frame, with a processing group disposed on the main frame, and an operating channel formed on the inner side of the main frame; The processing assembly includes: a heating box, a cooling device, a false twisting device, a conveying device, and a winding device as described in any one of claims 1 to 17, wherein the heating box and the cooling device are both inclinedly arranged above the operating channel.

Images