Filament heating device and false twist texturing machine

Abstract

The invention discloses a filament heating device and a false twist texturing machine, the filament heating device comprises a heating device body, a heating part and a heating track, the heating part and the heating track are arranged in the heating device body, the heating track is arranged along the length direction of the heating device, one side of the heating track in contact with a filament is provided with an open space, and the open space is provided with an opening. The heating device is further provided with a door part and a heat insulation part, at least the heat insulation part moves between a working position for filling the open space and a wire feeding position offset relative to the working position in the orthogonal direction, and in the moving process, the heat insulation part enters and exits the open space from one side of the open space. The filling of the open space can ensure that the temperature loss is controlled as much as possible when the filament heating work is carried out, so that the heating and heat preservation efficiency is improved. The wire feeding position is arranged at the position, deviated relative to the working position, in the orthogonal direction, and the heating track is in the state that an operator can clean, replace and maintain the heating track easily.

Description

Technical Field

[0001] This invention relates to a heating device for heating polyester, nylon and other filaments, as well as a false twist texturer. Background Technology

[0002] Similar heating devices have been disclosed in existing technical documents, such as DE19631860A1.

[0003] This document discloses a heating device having a groove and a cover plate for closing the groove. The groove is formed inside the heating device. A heating element, designed as a heating rod, is located in the bottom region of the groove. The bottom region of the groove is one of the heating surfaces. To prevent the filament from contacting the bottom of the groove under any circumstances, a support mesh is arranged in the bottom region of the groove. The groove of the heating device is closed by the cover plate. The cover plate is designed as an insulating cover plate so that the energy introduced into the groove by the resistance heater can be transferred to the filament as concentratedly as possible. The cover plate is connected to the heating device by a rotating mechanism. There is a chamfer in the outlet region of the groove of the heating device, and the chamfer on the cover plate is adapted to it so that when the cover plate is closed, the yarn guide connected to the cover plate can be aligned relative to the groove.

[0004] Heating devices with this type of structure are called "open heating devices," specifically referring to their openable feature. The cover plate must be opened when the filament is guided into the groove. After the guiding action is complete, the cover plate is closed.

[0005] The closed groove needs to have excellent heat insulation so that the filaments can be heated to the desired temperature in an efficient manner and the temperature deviation can be kept within an ideal range.

[0006] Even when the recesses in this type of heating device are sealed, the poor insulation of the cover plate is one reason for the overall poor insulation performance of the device. Additionally, the large hollow structure between the cover plate and the heating element also weakens the overall insulation performance of the heating device. Summary of the Invention

[0007] The purpose of this invention is to provide a heating device and a false-twist texturing machine that enhance the heat insulation performance of the heating device based on the open heating device design in the prior art. In addition, this invention also emphasizes the ease of cleaning, maintenance, and repair of the heating device.

[0008] According to one aspect of the present invention, a filament heating device includes a heating device body, a heating section disposed within the heating device body, and a heating track, the heating track being arranged along the length direction of the heating device, the side of the heating track in contact with the filament having an open space, the open space extending along the length direction, the heating device further having a door and a heat insulation section, at least the heat insulation section moving between a working position that fills the open space and a filament feeding position offset relative to the working position along an orthogonal direction orthogonal to the length direction, wherein during the movement, the heat insulation section enters and exits the open space from one side of the open space.

[0009] The heat insulation portion extends into the open space, with its bottom surface close to the heating track, thus reducing the hollow space between the bottom surface of the heat insulation portion and the heating track. The smaller the hollow space, the less heat loss, thus ensuring that temperature loss is controlled as much as possible during filament heating, thereby increasing heating and heat preservation efficiency.

[0010] However, regarding the setting of the wire inlet position, this invention takes into account the convenience of actual cleaning, replacement, and maintenance processes, and sets the wire inlet position at a position offset from the working position in the orthogonal direction. With this design, when the heat insulation part is in the wire inlet position, the heating track can be easily cleaned, replaced, and maintained by the operator.

[0011] According to another aspect of the invention, the door portion and the heat insulation portion cooperate with a moving mechanism having an operating lever.

[0012] According to another aspect of the invention, the movement of at least the heat-insulating part is achieved by rotating the operating lever.

[0013] According to another aspect of the invention, the heat insulation portion is fixed on the side of the door portion facing the filament.

[0014] According to another aspect of the invention, the heat insulation portion is separated from the door portion and connected by a connecting rod.

[0015] Based on the design of the heat insulation portion being fixedly disposed with the door portion, according to another aspect of the present invention, the heat insulation portion has a beveled side portion inclined relative to the orthogonal direction, and the moving mechanism has: a gear portion mounted on the heating device body, the rotation axis of which is arranged along the length direction; a gear insertion portion located on the beveled side portion; and an operating lever mounted on the rotation axis of the gear portion. Sliding of the heat insulation portion and the door portion inclined relative to the orthogonal direction is achieved by rotation.

[0016] To prevent the operating lever from rotating unintended, according to another aspect of the invention, the operating lever is provided with a locking pin that can be inserted into a locking groove of a locking part that is fixedly connected to the heating device body.

[0017] Based on the design that the heat insulation part and the door part are separated from each other, according to another aspect of the invention, the door part, which has a rotating shaft, is connected to the operating lever, and the rotation of the operating lever triggers the rotation of the door part; the door part is connected to the middle position of the upper bending connecting rod, one end of which has a first slider slidably disposed in an arc-shaped upper guide groove; the other end of the upper bending connecting rod is rotatably connected to one end of the heat insulation part; the other end of the heat insulation part is rotatably connected to one end of the lower bending connecting rod; the lower bending connecting rod has a second slider near its other end, which is slidably disposed in a lower guide groove designed to bend along the orthogonal direction. In this way, the heat insulation part moves linearly in the open space, and after leaving the open space, the heat insulation part flips over to avoid occupying the space above the heating track.

[0018] This design philosophy ensures that when upgrading or modifying delivered products, minimal design changes are required to the original door structure.

[0019] Furthermore, the heat insulation portion fills the open space in such a way that it fills at least 50% of the depth of the open space along the orthogonal direction.

[0020] Furthermore, when the heat insulation part is in the working position, at least one tubular heating channel is formed between the bottom surface of the heat insulation part and the heating track, and each tubular heating channel is used to heat a filament.

[0021] The thickness of the heat insulation portion varies along its length as the curvature of the heating track changes.

[0022] The present invention further provides a false twisting texturing machine having the aforementioned heating device.

[0023] The false twist texturing machine includes general functional devices such as a yarn frame, a heating device, a cooling device, and a false twisting device, etc. Therefore, the excellent energy consumption performance of the heating device will be reflected in the excellent energy-saving performance of the whole machine. Attached Figure Description

[0024] Figure 1 A side view of a first embodiment of the heating device of the present invention in a first state is schematically shown;

[0025] Figure 2 A side view of a first embodiment of the heating device of the present invention in a second state is schematically shown;

[0026] Figure 3 A partial perspective view of the heating device in the first embodiment is shown schematically;

[0027] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0028] Figure 5 A side view schematically illustrates another embodiment of the heating device of the present invention in a first state;

[0029] Figure 6 schematically shown Figure 5 Side view of the embodiment in the third state;

[0030] Figure 7 schematically shown Figure 5 Side view of the embodiment in the second state. Detailed Implementation

[0031] The heating device of the present invention heats filaments using a heating element disposed therein. The heating element is typically an electric heating rod, which uses a heat-conducting medium to transfer heat to a heating track. Alternatively, a biphenyl heating method can be used. Although the two heating methods result in structural differences in the heating device, the technical solution of the present invention can be used in either method. The filaments traveling on and in contact with the heating track are heated to a predetermined temperature. The filaments are then subjected to desired treatments, such as stretching or false twisting, utilizing the physical properties of the filaments at the predetermined temperature.

[0032] Figure 1 A side view of a first embodiment of the heating device of the present invention in a first state is schematically shown. Figure 2 A side view of a first embodiment of the heating device of the present invention is schematically shown in a second state. The "first state" refers to the state when the heat insulation part of the heating device is in the working position. The "second state" refers to the state when the heat insulation part is in the wire feeding position.

[0033] Reference Figure 1 and 2 A heat insulation section 4 of a certain thickness is fixedly installed on the side of the door 30 facing the heating tracks 2.1 and 2.2. Each of the heating tracks is used to heat one filament. The side of the heating tracks 2.1 and 2.2 that contacts the filament has an open space 3. Figure 1 In the middle, the open space 3 has been substantially filled by the heat insulation part 4. Conversely, in Figure 2 In this process, the open space 3 is at least partially opened to form the wire feeding space 12, the characteristics of which will be described later.

[0034] Viewed from the side, the heat insulation portion 4 is configured as a triangle, having a hypotenuse 6 and a straight side 11. The straight side 11 extends along... Figure 1 or Figure 2 Extending in the orthogonal direction shown in the figure, the inclined side 6 is inclined relative to the orthogonal direction indicated in the figure. To match the shape of the heat insulation part 4, the open space 3 is provided with a straight inner wall 10 and an inclined inner wall 31. The heat insulation part 4 is located... Figure 1 When in the position shown, the inclined side 6 is completely fitted with the inner wall 31 of the inclined side, and the straight side 11 is completely fitted with the inner wall 10 of the straight side.

[0035] Figure 1 The small space between the heat insulation part 4 and the heating tracks 2.1 and 2.2 shown in the figure ensures that the filament is heated in an environment with minimal heat loss. Figure 2 The diagram shows the filament feeding space 12 opened between the straight inner wall 10 and the straight edge portion 11. Since the filament feeding space 12 can be opened to a certain width, for example, at least the same width as the two heating rails 2.1, 2.2, it not only has the advantage of easy filament introduction, but also the beneficial effect of making it easier for operators to clean and maintain the heating rails 2.1, 2.2.

[0036] To achieve the above-mentioned technical effects, the heating device has a moving mechanism to move the heat insulation part 4. Figure 3 A partial perspective view of the heating device according to the first embodiment is schematically shown. The moving mechanism includes a gear 7, which is rotatably mounted on the heating device body 1, and its rotation axis 8 is along the length direction (…). Figure 1 The direction perpendicular to the paper from the perspective, and Figure 3 The operating lever 16 extends in the direction indicated by the center. It protrudes from the heating device body 1 and coincides with the rotating shaft 8. The operating lever 16 is rotatable and can be pulled out along its length.

[0037] The locking part 14 is fixed to the heating device body 1 and has a locking groove 15. The operating lever 16 is provided with a locking pin 13. When it is necessary to rotate the operating lever 16, the operating lever 16 is pulled outward. After the locking pin 13 disengages from the locking groove 15, the operating lever 16 is rotated clockwise.

[0038] Figure 4 for Figure 3A partial enlarged view at point A. The operating lever 16 is provided with a protruding disc 17, and the locking pin 13 is located on the protruding disc 17. The protruding disc 17 is connected to the fixedly mounted retaining plate 18 via a compression spring 19. The protruding disc 17 can move along the length direction of the operating lever 16. At this time, under the thrust of the compression spring 19, the locking pin 13 is engaged in the locking groove 15, thus prohibiting the rotational movement of the operating lever 16.

[0039] The gear insertion part 9 is fixedly installed with the inclined side part 6. Preferably, the elongated gear insertion part 9 is inserted by one or more teeth of the gear part 7. The gear part 7, when rotated clockwise, can drive the gear insertion part 9 to move to the upper right along the inner wall 31 of the inclined side until it reaches the desired position. Figure 2 The location shown.

[0040] The filament feeding space 12 is formed between the straight inner wall 10 and the straight portion 11, and the width of the filament feeding space 12 is approximately equal to the width of the heating tracks 2.1 and 2.2. The filament is guided through the filament feeding space 12 to contact the heating tracks 2.1 and 2.2, respectively. Next, the operating lever 16 is pulled outward, releasing its locking state, and then rotated counterclockwise. The rotating gear 7 drives the heat insulation part 4 to move downward and to the left along the inclined inner wall 31 until it reaches... Figure 1 The position is shown. Then, the additional pulling force on the operating lever 16 is released, and the locking pin 13 automatically enters the locking groove 15, locking the rotation of the operating lever 16.

[0041] Figure 5 A side view of another embodiment of the heating device of the present invention in a first state is schematically shown. Figure 6 schematically shown Figure 5 Side view of the embodiment in the third state. Figure 7 schematically shown Figure 5 The embodiment is shown as a side view in the second state. The "first state" refers to the state when the heat insulation part is in the working position. The "second state" refers to the state when the heat insulation part is in the yarn feeding position. The "third state" refers to a state where the heat insulation part is in one of the "first state" and the "second state".

[0042] In comparison, Figure 5 , 6 The main difference between embodiment 7 and the previous embodiment lies in the structure of the moving mechanism, the shape of the heat insulation part, and the shape of the open space. The heat insulation part 4 is separated from the door part 5. Now refer to... Figure 5The door portion 5 rotates about its rotation axis 26. The operating lever (not shown) can have the same structure as in the previous embodiment, coinciding with the rotation axis 26; therefore, rotating the operating lever rotates the door portion 5. An upper bent connecting rod 21, designed in an L-shape, is rotatably connected to the middle portion of the door portion 5, with the first rotational connecting shaft marked 24. A first slider 23 is fixed to the right end of the upper bent connecting rod 21. The other end (lower end) of the upper bent connecting rod 21 is rotatably connected to the corresponding end (upper end) of the heat insulation part 4, with the second rotational connecting shaft marked 22. The first slider 13 is inserted into and can slide within the arc-shaped upper guide groove 29. During rotation, the door portion 5 only completes rotational movement about the rotation axis 26.

[0043] The other end (lower end) of the heat insulation part 4 is rotatably connected to the lower bending connecting rod 20, and the third rotating connecting shaft is marked by 25. The heat insulation part 4 is movably clamped between the upper bending connecting rod 21 and the lower bending connecting rod 20. A second slider 27 is provided near the right end of the lower bending rod 20, which can slide in the lower guide groove 28. The lower guide groove 28 is designed to be bent along the orthogonal direction.

[0044] Figure 5 In the shown state, the approximately rectangular open space 3 is filled with the vertically positioned heat insulation part 4. The bottom surface of the heat insulation part 4 presses against the upper end of the V-shaped heating tracks 2.1 and 2.2, thus forming two relatively independent tubular heating channels 30.1 and 30.2. The first slider 23 is located at the upper left end of the upper guide groove 29, and the second slider 27 is located at the lower right end of the lower guide groove 28.

[0045] Rotating the rotating shaft 26 clockwise causes the door portion 5 to rotate as well. The upper bending connecting rod 21 moves accordingly, and the first slider 23 moves along the upper guide groove 29 from its upper left end, while the second slider 27 moves along the lower guide groove 28 from its lower right end.

[0046] The heat insulation part 4, which is connected to the upper bending link 21 and the lower bending link 20, begins to move along the orthogonal direction under the constraint of the rectangular open space 3. Figure 6 This diagram shows the heating device 1 when the heat insulation part 4 is about to move out of the open space 3.

[0047] As the door 5 continues to rotate, the heat insulation part 4, after leaving the open space 3, flips over and moves to a wire feeding position offset from the working position along a direction orthogonal to the working position, such as... Figure 7As shown. The flipping motion of the heat insulation part 4 depends on the structure of the upper bending connecting rod 21 and the lower bending connecting rod 20, as well as the arc-shaped upper guide groove 29 and the lower guide groove 28 bent along the orthogonal direction.

[0048] Regarding the delivered heating devices, the second embodiment described above is more suitable for retrofitting existing products compared to the first embodiment. Specifically, currently available heating devices already have a rotatable door, so implementing the second embodiment does not require changes to the door design or the rectangular open space, but requires additional components such as a moving mechanism and insulation. Conversely, implementing the first embodiment requires changes to the original design of the door and the open space.

[0049] The heat insulation section here can be shaped from glass fiber felt and wrapped with heat insulation material inside. Of course, the heat insulation section can also be shaped from other materials, such as metal.

[0050] As attached Figure 5 The resulting filament feeding space 12 has a width at least the same as the two heating tracks 2.1 and 2.2, with the side of the heating tracks 2.1 and 2.2 that contacts the filament fully exposed, facilitating replacement, cleaning, and maintenance by operators.

[0051] In order to better fit the heating tracks 2.1 and 2.2, which are curved along the length direction, the thickness of the heat insulation part 4 is smaller at the middle position than at its two ends.

[0052] In the above embodiments, the heat insulation portion 4 does not necessarily completely fill the open space 3. Although the optimal configuration is that the bottom surface of the heat insulation portion 4 presses against the upper end of the V-shaped heating tracks 2.1 and 2.2 to form two relatively independent tubular heating channels 30.1 and 30.2, in a suboptimal configuration, the heat insulation portion 4 fills the open space 3 in such a way that it fills at least 50% of the depth of the open space 3 along the orthogonal direction.

[0053] This invention also provides a false-twist texturing machine. This false-twist texturing machine generally includes a filament carrier supporting POY filaments, which are formed in a bobbin-like manner. The conveying device for transporting the filaments can be a known conveying device structure. The false-twist texturing machine also includes a heating device and a cooling device. The cooling device can be a contact cooling, active airflow cooling, or active liquid cooling method. A false-twist device located downstream of the cooling device performs false-twist treatment on the filaments. The final step in the false-twist texturing process is DTY filament winding, which is performed using a winding device. The heating device of the false-twist texturing machine has the aforementioned technical solution; therefore, the false-twist texturing machine incorporates the beneficial effects of the heating device.

[0054] The present application has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on its spirit and principles, and these modifications and variations are also within the scope of the present application.

[0055] Preferred embodiments of this application have been described above with reference to the figures. Many features and advantages of these embodiments are apparent from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. Furthermore, since many modifications and alterations will readily occur to those skilled in the art, the embodiments of this application are not intended to be limited to the precise structures and operations illustrated and described, but rather to encompass all suitable modifications and equivalents falling within their scope.

Claims

1. A filament heating device, comprising a heating device body, a heating section disposed within the heating device body, and a heating track, the heating track being arranged along the length direction of the heating device, the side of the heating track in contact with the filament having an open space, the open space extending along the length direction, the heating device further comprising a door and a heat insulation section. Its features are, At least the heat insulation portion moves between a working position that fills the open space and a wire feed position that is offset relative to the working position along an orthogonal direction orthogonal to the length direction, during which the heat insulation portion enters and exits the open space from one side of the open space.

2. The filament heating device as described in claim 1, Its features are, The door and the heat insulation part cooperate with a moving mechanism having an operating lever.

3. The filament heating device as described in claim 2, Its features are, The movement of at least the heat-insulating part is achieved by rotating the operating lever.

4. The filament heating device as described in claim 2, Its features are, The heat insulation part is fixed on the side of the door facing the long filament.

5. The filament heating device as described in claim 2, Its features are, The heat insulation part is separated from the door part and is connected by a connecting rod.

6. The filament heating device as described in claim 4, Its features are, The heat insulation portion has a beveled edge inclined relative to the orthogonal direction, and the moving mechanism has: The gear portion mounted on the heating device body has its rotation axis arranged along the length direction; The gear insertion part is located on the inclined side; The operating lever is mounted on the rotating shaft of the gear section.

7. The filament heating device as described in claim 6, Its features are, The operating lever is equipped with a locking pin, which can be inserted into the locking groove of the locking part that is fixedly connected to the heating device body.

8. The filament heating device as described in claim 5, Its features are, The door portion having a rotating shaft is connected to the operating lever, and rotation of the operating lever triggers rotation of the door portion; The door is connected to the middle position of the upper bending link, and one end of the upper bending link has a first slider, which is slidably disposed in the arc-shaped upper guide groove; The other end of the upper bent connecting rod is rotatably connected to one end of the heat insulation part; The other end of the heat insulation part is rotatably connected to one end of the lower bent connecting rod; The lower bending link has a second slider near its other end, which is slidably disposed in a lower guide groove that is bent along the orthogonal direction.

9. The filament heating device as described in claim 1, Its features are, The insulation fills the open space in such a way that it fills at least 50% of the depth of the open space along the orthogonal direction.

10. The filament heating device as described in claim 1, Its features are, When the heat insulation part is in the working position, at least one tubular heating channel is formed between the bottom surface of the heat insulation part and the heating track, and each tubular heating channel is used to heat a filament.

11. The filament heating device as described in any one of claims 1 to 10, Its features are, The thickness of the heat insulation portion varies along its length as the curvature of the heating track changes.

12. A false-twist texturing machine, Its features are, The false twisting machine has a heating device according to any one of claims 1-10.

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