Spinneret, spinneret die and meltblown equipment

Abstract

The present application discloses a spinneret, a spinneret die head and a melt-blowing device. The spinneret includes a plate body, a groove penetrating the plate body, a plurality of capillaries arranged in the groove, and a solder filled between the outer wall of the capillary and the inner wall of the groove, wherein the solder fixes the capillary to the plate body. The spinneret die head and the melt-blowing device adopt the spinneret. The groove can be processed and formed at one time, and the function of the spinneret is realized by a plurality of capillaries fixed therein, which reduces the processing difficulty of the spinneret and can shorten the processing time.

Description

Technical Field

[0001] The invention relates to the field of spinning, in particular to a melt-blowing device. Background Art

[0002] Meltblown machine is a one-step cloth-making equipment that uses meltblowing method to make resin slices or resin particles into fiber net. The fiber net is generally used for filter materials, oil absorption materials, sanitary materials, etc. The meltblown die head is the key component of the meltblown machine. The uniformity of meltblown nonwoven fabrics is closely related to the design and manufacturing of the die head.

[0003] In the related art, the spinneret is mainly designed to process spinneret holes with a hole diameter of 0.3~0.4mm and a spacing of 12~16 holes / cm on the plate. In this way, the fiber melt is extruded under high pressure and ejected from the spinneret holes into filaments. The spinneret holes are small in diameter and numerous in number, which makes the processing very difficult and the processing time very long, so there is room for improvement. Summary of the invention

[0004] In view of this, the present application discloses a spinneret, aiming to reduce the processing difficulty of the spinneret and shorten the processing time.

[0005] Spinneret, for meltblowing equipment, including:

[0006] A plate body, wherein a groove is provided through the plate body;

[0007] A plurality of capillaries are arranged in the groove; and

[0008] The solder is filled between the outer wall of the capillary and the inner wall of the groove, and fixes the capillary to the plate.

[0009] Preferably, the groove comprises:

[0010] A plurality of positioning grooves, used for positioning and installing the plurality of capillaries; and

[0011] A plurality of connecting grooves are alternately arranged with the plurality of positioning grooves and traverse and connect with the plurality of positioning grooves in a predetermined order.

[0012] Preferably, the plurality of positioning grooves are arranged in a straight line at a predetermined interval.

[0013] Preferably, the plurality of positioning grooves are distributed along a fold line.

[0014] Preferably, the plurality of positioning grooves are arranged along the circumference of a polygon.

[0015] Preferably, the positioning groove is a circular through hole with an inner diameter greater than the diameter of the capillary tube, and the connecting groove is an elongated through hole with a width less than the diameter of the capillary tube; the connecting groove connects two adjacent positioning grooves along its length direction;

[0016] The capillary tube is concentrically arranged with the corresponding positioning groove.

[0017] In some other preferred embodiments, a plurality of groups of the grooves are provided on the plate body, and at least two capillaries are arranged in each group of the grooves.

[0018] Preferably, the groove comprises:

[0019] At least two positioning grooves, used for positioning and installing the at least two groups of capillaries; and

[0020] The connecting groove traverses and connects the plurality of positioning grooves in a predetermined order.

[0021] Preferably, the at least two positioning grooves are arranged on a straight line at a predetermined interval.

[0022] Preferably, the groove includes at least 3 positioning grooves, and the at least 3 positioning grooves are distributed along a fold line.

[0023] Preferably, the groove includes at least three positioning grooves, and the at least three positioning grooves are arranged along the circumference of a polygon.

[0024] Preferably, the positioning groove is a circular through hole with an inner diameter greater than the diameter of the capillary tube, and the connecting groove is an elongated through hole with a width less than the diameter of the capillary tube; the connecting groove connects two adjacent positioning grooves along its length direction;

[0025] The capillary tube is concentrically arranged with the corresponding positioning groove.

[0026] The invention also discloses a spinning die head, comprising:

[0027] A support, wherein an air flow channel is provided on the upper side of the support, and a spinneret is provided in the middle of the support;

[0028] A mounting member, disposed on the upper side of the support and cooperating with the air flow channel;

[0029] A barrel, disposed on the upper side of the mounting member;

[0030] The barrel and the middle part of the mounting member are connected to the spinneret, and the spinneret die head also includes the aforementioned spinneret plate; the spinneret plate is fixed to the through-through part of the mounting member, and the end of the capillary is connected to the spinneret.

[0031] In addition, the present invention also discloses a melt-blowing device, comprising: a feeding mechanism, a heating device, an air heater, an air pressure device, and also the aforementioned spinneret die head;

[0032] The heating device is connected to the feeding mechanism and is used to heat the spinning material in the feeding mechanism to a molten state; the feeding mechanism is connected to the barrel through a discharge hole; the air pressure device cooperates with the air heater and is used to blow hot air into the air flow channel.

[0033] In the above-mentioned spinneret, spinneret die and meltblowing equipment, grooves are provided on the plate body, multiple capillaries are arranged in the grooves and fixed by solder, and multiple spinneret holes are formed by the capillaries. The grooves can be cut and formed at one time by processing methods such as wire cutting, and the capillaries can be prefabricated. In this way, the problems of high processing difficulty and long processing time caused by directly opening multiple small-aperture spinneret holes on the plate body can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0035] Figure 1 The present invention is a schematic block diagram of the structure of a meltblowing device in a preferred embodiment.

[0036] Figure 2 It is a cross-sectional schematic diagram of a spinneret in a preferred embodiment.

[0037] Figure 3 for Figure 2 A partial enlarged view of part A.

[0038] Figure 4 for Figure 2 Schematic diagram of the structure of the spinneret in the spinneret die head shown.

[0039] Figure 5 for Figure 4 Broken view of the cross-sectional view along the VV direction.

[0040] Figure 6 yes Figure 2 The structure diagram of the plate body of the spinneret shown in the first embodiment shows the grooves.

[0041] Figure 7 2 is a schematic diagram of the structure of the plate body in the second embodiment, showing the grooves.

[0042] Figure 8 It is a schematic structural diagram of the plate body in the second embodiment in another preferred implementation manner.

[0043] Fig. 9 FIG. 4 is a schematic diagram of the structure of the plate body in the third embodiment, in which the grooves are shown.

[0044] Reference numerals:

[0045] 10 Feeding mechanism

[0046] 20 Heating device

[0047] 30 Spinneret

[0048] 31 Support

[0049] 32 Mounting parts

[0050] 33 Barrel

[0051] 34 Spinneret

[0052] 40 Air Heater

[0053] 50 Air pressure device

[0054] 60 Discharging mechanism

[0055] 100 Meltblown equipment

[0056] 311 Airflow Channel

[0057] 312 Spinneret

[0058] 321 Through

[0059] 341 plate body

[0060] 342 Groove

[0061] 343 Capillary

[0062] 344 Solder

[0063] 3421 Positioning slot

[0064] 3422 Connecting slot

[0065] 31a First windshield

[0066] 31b Second wind deflector DETAILED DESCRIPTION

[0067] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0068] like Figure 1 As shown, the meltblowing equipment 100 includes a feeding mechanism 10, a heating device 20, a spinneret 30, an air heater 40, an air pressure device 50 and a discharging mechanism 60.

[0069] The feeding mechanism 10 is used to feed the spinning raw material. The heating device 20 is connected to the feeding mechanism 10 and is used to heat the spinning raw material in the feeding mechanism 10 to a molten state. The feeding mechanism 10 feeds the spinning raw material in a molten state to the spinning die 30. At the same time, the air pressure device 50 is used in conjunction with the air heater 40 to provide high-speed hot air to the spinning die 30. The spinning raw material is blown and stretched through the spinning die under the action of high-speed hot air to form extremely fine fibers, and then gathered through the discharging mechanism 60, such as a web-forming roller or a web-forming curtain, to form a fiber web, and finally reinforced by self-adhesion to form a melt-blown fiber nonwoven fabric.

[0070] See also Figures 2 to 3 As shown, the spinneret 30 includes a support 31 , a mounting member 32 , a barrel 33 and a spinneret 34 .

[0071] Taking the support 31 placed vertically as an example, an airflow channel 311 is provided on the upper side of the support 31, and a spinneret 312 is provided in the middle of the support 31. In a specific implementation, the support 31 can be configured as two windshields. For example, the support 31 includes a first windshield 31a and a second windshield 31b, and the airflow channel 311 is provided on the first windshield 31a and the second windshield 31b respectively. The spinneret 312 is formed between the first windshield 31a and the second windshield 31b.

[0072] The mounting member 32 is disposed on the upper side of the support 31 and cooperates with the air flow channel 311. The barrel 33 is disposed on the upper side of the mounting member 32.

[0073] The barrel 33 and the middle portion of the mounting member 32 are connected to the spinneret 312 .

[0074] The spinneret 34 is fixed to the through-hole of the mounting member 32 .

[0075] For example, in a specific implementation, a groove with a flush end surface is formed on the upper side of the support 31, and after the lower end surface of the mounting member 32 is attached to the upper end surface of the support 31, the upper side of the groove is closed to form the airflow channel 311. In addition, the air pressure device 50 is used in conjunction with the air heater 40 to blow high-speed hot air into the airflow channel 311.

[0076] It is understandable that the "upper side" and "lower side" here are only for the convenience of explaining the relative position relationship of the support 31, the mounting member 32, the barrel 33 and the spinneret 34 in the spinneret die 30, and do not absolutely limit the orientation of each component. When the spinneret die 30 is changed in a specific use scenario, the directions of the support 31, the mounting member 32, the barrel 33 and the spinneret 34 can be adjusted as a whole, as long as the aforementioned matching relationship is satisfied.

[0077] The barrel 33 is docked with the feeding mechanism 10. After the heating device 20 heats the spinning material in the feeding mechanism 10 to a molten state, the feeding mechanism 10 feeds the molten spinning material to the through-hole of the mounting member 32. The air pressure device 50 cooperates with the air heater 40 to blow high-speed hot air into the air flow channel 311. The spinning material in the mounting member 32 enters the spinneret 34 through its through-hole under the action of the high-speed hot air. The spinning material is extruded and stretched by the spinneret 34 to form extremely fine fiber filaments, which are then ejected from the spinneret 312.

[0078] See also Figures 4 to 8 As shown, the spinneret 34 includes a plate body 341 , a groove 342 , a plurality of capillaries 343 and solder 344 .

[0079] The groove 342 is not a solid body, but a through groove that penetrates the plate body 341 .

[0080] A plurality of capillaries 343 are arranged in the groove 342. The end of the capillary 343 is butted against the spinneret 312, and the capillary 342 is used as a spinneret. In a specific implementation, the arrangement of the plurality of capillaries 343 can be arranged at a predetermined distance and position according to the requirements of the ejected fiber filaments for spacing and position.

[0081] The solder 344 is filled between the outer wall of the capillary 343 and the inner wall of the groove 342 , and fixes the capillary 343 to the plate 341 .

[0082] By providing a groove 342 on the plate body 341, arranging a plurality of capillaries 343 in the groove 342 and fixing them by solder 344, the capillaries 343 with a small inner diameter can be directly used as spinnerets, and it is possible to avoid processing through holes one by one on the body 341. At the same time, the groove 342 can be cut and formed at one time by a processing method such as wire cutting, and the capillaries 343 can be prefabricated, so that the problems of high processing difficulty and long processing time caused by directly opening a plurality of small-diameter spinnerets on the plate body can be avoided.

[0083] To achieve stable positioning, the positioning groove 3421 is a circular through hole with an inner diameter greater than the diameter of the capillary 343, and the capillary is concentrically arranged with the corresponding positioning groove. The connecting groove 3422 is an elongated through hole with a width less than the diameter of the capillary 343, so as to achieve positioning and stopping of the capillary. The connecting groove 3422 connects two adjacent positioning grooves 3421 along its length direction.

[0084] The grooves 342 on the plate body 341 can be configured in various forms, which will be described in detail below in conjunction with specific embodiments and drawings.

[0085] Embodiment 1

[0086] Please refer to Figures 4 to 6 As shown, a groove 342 may be provided on the plate body 341 , and the groove 342 extends along the length direction of the plate body 341 .

[0087] Specifically, the groove 342 includes a plurality of positioning grooves 3421 and a plurality of connecting grooves 3422. The plurality of positioning grooves 3421 are respectively used to position and install a plurality of capillaries 343. In a specific implementation, for convenient positioning, the capillaries 343 and the positioning grooves 3421 can be arranged one by one.

[0088] The plurality of connecting grooves 3422 and the plurality of positioning grooves 3421 are arranged alternately, and the plurality of connecting grooves 3422 traverse and connect the plurality of positioning grooves 3421 in a predetermined order. Specifically, when there are N positioning grooves, the number of connecting grooves may be N-1 correspondingly, and two adjacent positioning grooves 3421 are connected through one connecting groove 3422, where N is an integer greater than or equal to 3.

[0089] By providing the plurality of connecting grooves 3422, the plurality of positioning grooves 3421 can be connected as one, so that during processing, all the positioning grooves 3422 corresponding to a groove 342 can be processed by cutting at one time, avoiding repeated positioning, tool alignment, drilling and other processes. Taking the groove 342 processed by wire cutting as an example, processing the groove 342 only requires opening a through hole at the starting position on the plate body 341, and then inserting the through hole at the starting position of the electrode wire of the wire cutting machine, and then the plurality of positioning grooves 3421 can be continuously cut through the connecting groove 3422.

[0090] After the corresponding capillaries 343 are positioned correspondingly to the positioning grooves 3422 , solder 344 is filled into the grooves 342 , and the capillaries 343 are fixed on the plate body 341 by brazing, so as to form a spinneret 34 with a spinning function.

[0091] In a preferred embodiment, the plurality of positioning grooves 3421 may be arranged in a straight line at a predetermined interval.

[0092] It can be understood that in this embodiment, the multiple positioning grooves 3421 and the multiple connecting grooves 3422 can also be connected to form through grooves of equal width, that is, there is no need to set the positioning grooves 3421 and the connecting grooves 3422 separately. In this way, the capillary 343 to be fixed can be positioned in the groove 342 by means of auxiliary positioning of a jig, and then the filling and welding of the solder 344 can be completed, and the concept of the present application can also be realized.

[0093] Embodiment 2

[0094] Please refer to Figure 7 FIG. 3 is another embodiment of the groove 342 on the plate 341. In the second embodiment, the plate 341 may be provided with a groove 342, and the embodiment is basically the same as the first embodiment, except that the plurality of positioning grooves 3421 in the second embodiment are distributed along a fold line.

[0095] Correspondingly, when processing the groove 342, wire cutting can also be used. To process the groove 342, it is only necessary to open a through hole at the starting position on the plate 341, and then pass the electrode wire of the wire cutting machine through the through hole at the starting position. Subsequently, the connecting groove 3422 can be passed through to continuously cut out the aforementioned multiple positioning grooves 3421. It is only necessary to control the electrode wire to move along the fold line based on Example 1.

[0096] In this embodiment, the positioning grooves 3421 are all located at the inflection points of the fold lines.

[0097] Ginseng Figure 8 As shown, in a preferred embodiment, a plurality of positioning grooves 3421 may be provided between the inflection points of the fold line. The positioning grooves 3421 may be provided according to the use scenario, and the requirement of continuously cutting the grooves 342 may be satisfied.

[0098] In other embodiments, the plurality of positioning grooves 3421 may also be arranged along the circumference of a polygon, or along a spiral line, etc. Similarly, it is only necessary to meet the requirement of continuously cutting the grooves 342, and they will not be listed one by one for explanation.

[0099] Embodiment 3

[0100] Please refer to Fig. 9 As shown, the implementation of Example 3 is basically the same as that of Example 1 and Example 2, with the only difference being that in Example 3, a plurality of groups of grooves 342 are provided on the plate body 341 , and at least two capillaries are arranged in each group of grooves 342 .

[0101] The implementation of each groove 342 can adopt any form in the first embodiment or the second embodiment, which will not be described in detail here.

[0102] Correspondingly, when the spinneret 34 is provided with only one groove corresponding to the plate body 341, the spinneret 34 can be manufactured by the following steps.

[0103] The plate body 341 is continuously cut to form a groove 342 penetrating the plate body 341 .

[0104] A plurality of pre-prepared capillaries 343 are arranged in the groove 342 .

[0105] Solder is filled between the outer wall of the capillary 343 and the inner wall of the groove 342, and the capillary 343 is brazed to the plate body 341, that is, the outer wall of the capillary 343 is fixed to the inner wall of the groove 342 by soldering. The capillary 343 is used as a spinneret of the spinneret 34, so it is easy to understand that the aperture of the capillary 343 is selected to be a size suitable for the spinneret fiber to be processed. The capillary 343 can be prepared in advance and the finished product can be used directly.

[0106] In a specific implementation, the step of continuously cutting on the plate body 341 to form the groove 342 penetrating the plate body 341 may specifically include the following steps:

[0107] A through hole is formed at a predetermined initial cutting position of the plate body 341;

[0108] Passing the electrode wire of the wire cutting machine through the through hole and aligning the tool;

[0109] The wire cutting machine is started to continuously cut the groove 342 according to a predetermined trajectory.

[0110] In this way, the groove 342 can be processed continuously through one initial positioning.

[0111] Preferably, the length of the pre-prepared plurality of capillaries 343 is greater than the depth of the groove 342; the step of arranging the pre-prepared plurality of capillaries 343 in the groove 342 comprises:

[0112] Clamping one end of the plurality of capillaries on a fixture;

[0113] The other ends of the capillaries are extended into the groove until they are flush with the outer edge of the groove 342 .

[0114] Thus, the length of the capillary 343 is greater than the depth of the groove 342 , one end of the capillary 343 is flush with the outer edge of the groove 342 , and the other end extends out of the groove 342 , and can be used to be clamped on a fixture.

[0115] Accordingly, after the step of brazing the capillary 343 to the plate 341, the following steps may be further included:

[0116] The portions of the capillaries 343 that extend beyond the grooves 342 are removed. It is understood that the excess portions may be removed in their entirety, or only a portion of the length may be removed as required. The removal may be supplemented by grinding, deburring, and other operations.

[0117] In a specific implementation, the step of filling the solder 344 between the outer wall of the capillary 343 and the inner wall of the groove 342 and soldering the capillary 343 to the plate body may specifically include the following steps:

[0118] Put solder 344 into the groove 342;

[0119] Heating the solder 344 and the corresponding position of the capillary 343 until the solder 344 melts;

[0120] The space between the outer wall of the capillary 343 and the inner wall of the groove 342 is filled with the melted solder 344 to weld the capillary 343 and the plate 341 .

[0121] Correspondingly, when a plurality of grooves 342 are provided on the plate body 341, the spinneret 34 can be manufactured by the following steps.

[0122] A plurality of grooves 342 are cut on the plate 341 to penetrate the plate;

[0123] At least two capillaries 343 are arranged in each group of the grooves 342;

[0124] Solder 344 is filled between the outer wall of the capillary 343 and the inner wall of the corresponding groove 342 , and the capillary 343 is brazed to the plate 341 .

[0125] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0126] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0127] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A spinneret for melt-blowing equipment, characterized in that: include: A plate body, wherein a groove is provided through the plate body; A plurality of capillaries are arranged in the groove; and Solder is filled between the outer wall of the capillary and the inner wall of the groove, and fixes the capillary to the plate; The groove comprises: A plurality of positioning grooves, used for positioning and installing the plurality of capillaries; and A plurality of connecting grooves, which are arranged alternately with the plurality of positioning grooves and traverse and connect with the plurality of positioning grooves in a predetermined order; The plate body is provided with a plurality of groups of grooves, and at least two capillaries are arranged in each group of grooves.

2. The spinneret according to claim 1, characterized in that: The plurality of positioning grooves are arranged on a straight line at a predetermined interval.

3. The spinneret according to claim 1, characterized in that The plurality of positioning grooves are distributed along a fold line.

4. The spinneret according to claim 1, characterized in that The plurality of positioning grooves are arranged along a circumferential direction of a polygon.

5. The spinneret according to any one of claims 1 to 4, characterized in that: The positioning groove is a circular through hole with an inner diameter larger than the diameter of the capillary tube, and the connecting groove is an elongated through hole with a width smaller than the diameter of the capillary tube; the connecting groove connects two adjacent positioning grooves along its length direction; The capillary tube is concentrically arranged with the corresponding positioning groove.

6. The spinneret according to claim 1, characterized in that The groove comprises: at least two positioning grooves, used for positioning and installing the at least two groups of capillaries; and The connecting groove traverses and connects the plurality of positioning grooves in a predetermined order.

7. The spinneret according to claim 6, characterized in that: The at least two positioning grooves are arranged on a straight line at a predetermined interval.

8. The spinneret according to claim 6, characterized in that: The groove includes at least three positioning grooves, and the at least three positioning grooves are distributed along a fold line.

9. The spinneret according to claim 6, characterized in that: The groove includes at least three positioning grooves, and the at least three positioning grooves are arranged along a polygonal circumference.

10. The spinneret according to any one of claims 6 to 9, characterized in that: The positioning groove is a circular through hole with an inner diameter larger than the diameter of the capillary tube, and the connecting groove is an elongated through hole with a width smaller than the diameter of the capillary tube; the connecting groove connects two adjacent positioning grooves along its length direction; The capillary tube is concentrically arranged with the corresponding positioning groove.

11. A spinning die head, comprising: A support, wherein an air flow channel is provided on the upper side of the support, and a spinneret is provided in the middle of the support; A mounting member, disposed on the upper side of the support and cooperating with the air flow channel; A barrel, disposed on the upper side of the mounting member; The barrel and the middle part of the mounting member are connected to the spinneret, and the spinneret die head further comprises a spinneret as described in any one of claims 1 to 10; the spinneret is fixed to the through-through part of the mounting member, and the end of the capillary is connected to the spinneret.

12. A melt-blown device, comprising: A feeding mechanism, a heating device, an air heater, and an air pressure device, characterized in that it also includes a spinneret as claimed in claim 11; The heating device is connected to the feeding mechanism and is used to heat the spinning material in the feeding mechanism to a molten state; the feeding mechanism is connected to the barrel through a discharge hole; the air pressure device cooperates with the air heater and is used to blow hot air into the air flow channel.

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