CN111705367B

CN111705367B - Melt-blown die head with hot runner system

Info

Publication number: CN111705367B
Application number: CN202010591268.2A
Authority: CN
Inventors: 张占波; 陶玉清; 徐云
Original assignee: Shanghai Anry Mold Component Co ltd
Current assignee: Shanghai Anry Mold Component Co ltd
Priority date: 2020-06-24
Filing date: 2020-06-24
Publication date: 2021-06-04
Anticipated expiration: 2040-06-24
Also published as: CN111705367A

Abstract

The utility model relates to a take hot runner system's melt-blown die head, belong to the mould equipment field, main part mould bottom is equipped with the spinneret orifice, two gas boards are symmetrical about the axis of spinneret orifice each other, constitute the crack passageway between two gas boards and the main part mould respectively, the air intake of two crack passageways docks and communicates each other with air current passageway respectively, the air outlet of two crack passageways all faces the ejection of compact direction of spinneret orifice, the main part mould is equipped with the mounting groove that is used for installing the gas board, the length of mounting groove on for two gas boards line direction is greater than the length of gas board, the gas board is fixed through adjusting screw and locking screw and main part mould realization, the main part mould is equipped with the screw hole with adjusting screw looks adaptation, the screw thread section of adjusting screw is established soon in the screw hole and its inner end supports tightly on the lateral wall of spinneret orifice one side is kept away from to the gas board, the main part mould is equipped with first through-hole, the screw thread section of locking screw. The melt-blown die head can spray more uniformly.

Description

Melt-blown die head with hot runner system

Technical Field

The application relates to the technical field of die equipment, in particular to a melt-blowing die head with a hot runner system.

Background

The melt-blown method is a commonly used spinning method in the non-woven fabric manufacturing technology, generally, high-speed hot air with crossed directions is adopted to draw, solidify and form high polymers extruded from die holes, and the method is commonly used for producing non-woven fabrics such as polypropylene fibers, terylene and the like.

The melt-blown machine is a core component for manufacturing non-woven fabrics by a melt-blown method, wherein the melt-blown die head is also a core component for realizing high polymer wire drawing forming in the melt-blown machine, and the design of the melt-blown die head directly influences the length, uniformity, toughness, fineness and other aspects of wire drawing, thereby having decisive influence on the final cloth finished product.

The application numbers are: 201810531548.7 discloses a melt-blown die head for preparing nano-fiber, which comprises a die head main body, a spinneret plate and an air plate, wherein the spinneret plate and the air plate are detachably arranged in the die head main body, a spinneret orifice is arranged in the spinneret plate, a plurality of crack slots are arranged between the spinneret plate and the air plate, a plurality of gas circulation channels are also arranged in the die head main body, the gas circulation channels are communicated with the crack slots, the outer wall of the die head main body is provided with a gas pipe connecting end, the gas pipe connecting end is communicated with a gas collecting cavity through a gas pipe, one end face of the spinneret orifice of the spinneret plate is fixedly connected with a spacing steady flow piece, the other end face of the spinneret orifice is fixedly connected with a pipeline connecting device, the spinneret orifice is connected with a discharge port of a screw extruder through the pipeline connecting device, a backflow channel is also arranged in the spinneret plate, one end of the backflow channel is communicated with the spinneret orifice, the other end of the backflow channel is connected with a pressure valve, the pressure valve is fixed on the end face of the spinneret plate, and the pressure valve is connected with a backflow feed inlet of the screw extruder through a backflow pipe.

The above-described meltblowing die has the following drawbacks: the die head main body of the melt-blown die head is fixedly connected with the air plate and the spinneret plate respectively, so that the size of a crack groove formed between the air plate and the spinneret plate is also fixed, but in the production process of actual parts, the air plate and the spinneret plate can have dimensional tolerance, so that two crack grooves formed after the die head is assembled can have the phenomenon of different sizes, the size of the sprayed air flow is different, and the uniformity of the spinning of the die head is influenced.

Disclosure of Invention

In order to make the spinning more uniform when melt-blowing, the application provides a melt-blowing die head with a hot runner system.

The melt-blown die head with the hot runner system adopts the following technical scheme:

a melt-blown die head with a hot runner system comprises a main body die and two air plates arranged on the main body die, wherein a spinneret orifice is arranged at the bottom of the main body die, the two air plates are symmetrical with each other about the axis of the spinneret orifice, an air flow channel is arranged in the main body die, a crack channel is respectively formed between the two air plates and the main body die, air inlets of the two crack channels are respectively butted with the air flow channel and are mutually communicated, air outlets of the two crack channels face the discharging direction of the spinneret orifice, the main body die is provided with a mounting groove for mounting the air plates, the length of the mounting groove in the connecting line direction of the two air plates is larger than that of the air plates, the air plates are fixed with the main body die through adjusting screws and locking screws, the main body die is provided with threaded holes matched with the adjusting screws, the thread sections of the adjusting screws are screwed in the threaded holes, and the inner ends of the adjusting screws are abutted, the main body die is provided with a first through hole, a thread section of the locking screw penetrates through the first through hole and is in threaded connection with the side wall of the air plate far away from one side of the spinneret hole, a fixing screw is arranged between the air plate and the main body die, the axis of the fixing screw is parallel to the axis of the spinneret hole, the air plate is provided with a second through hole, the thread section of the fixing screw penetrates through the second through hole and is in threaded connection with the main body die, a gap is reserved between the inner wall of the second through hole and the outer wall of the fixing screw, the main body die comprises a die body and two sliding blocks in sliding connection with the die body, a crack channel is formed by assembling the die body and the air plate, the sliding direction of the sliding blocks is the axis direction of the first through hole, the die body is provided with a sliding groove matched with the sliding blocks, the sliding groove extends to the outer side wall of the die body, and, the inner wall of one side of the mounting groove, which is far away from the spinneret orifice, is positioned on the side wall of the adjacent slide block, the slide block is fixed with the die body through a bolt, and the fixing screw is in threaded connection with the slide block.

By adopting the technical scheme, the length of the mounting groove in the direction of the connecting line of the two gas plates is greater than that of the gas plates, so that the gas plates can move left and right in the mounting groove, the size of the crack channel can be adjusted, auxiliary adjustment can be performed by means of a feeler gauge with the same thickness during adjustment, after adjustment is completed, the gas plates are tightly propped by the adjusting screws, and the gas plates are tensioned by the locking screws, so that the gas plates can be stably fixed, the structure can enable the sizes of the two crack channels to be closer after the die head is assembled, enables the sizes of air flows sprayed from the two crack channels to be more uniform, and enables the die head to spray more uniformly; the fixing screws can further limit the upper position and the lower position of the air plate, so that the air plate can be fixed more stably; when the gas panel is disassembled to clean the crack channel, the gas panel and the die body can be separated only by unscrewing the bolt, the gas panel and the sliding block are still fixed together, and the sliding block and the die body are fixed only by the bolt in the subsequent assembly, so that the crack channel can be cleaned more conveniently.

Preferably, the inner wall of the crack channel is provided with a first hot air blocking groove downwards, the first hot air blocking groove extends along the length direction of the air plate, and the first hot air blocking groove is in butt joint with the air outlet of the air flow channel.

Through adopting above-mentioned technical scheme, hot-air can strike on the inner wall in first separation groove after passing through airflow channel for hot-air can flow and be full of whole first separation groove along the extending direction in first hot-blast separation groove, and hot-air can form the wind pressure in first separation groove, and such structure makes hot-air follow crack passageway blowout back again, makes the air current more even, improves the die head and spouts the degree of consistency of silk.

Preferably, a second hot air blocking groove is formed in the inner wall of the crack channel downwards, a communicating air channel is arranged between the first hot air blocking groove and the second hot air blocking groove, the second hot air blocking groove and the communicating air channel both extend along the length direction of the air plate, and the width of the communicating air channel is larger than that of the crack channel.

Through adopting above-mentioned technical scheme, hot-air flows to first separation groove from airflow channel in can form the wind pressure, but the middle part wind pressure of being connected with airflow channel still can be relatively great, and the air current of going out from first separation groove is still very inhomogeneous, when the air current flows to second separation groove direction from first separation groove, through setting the width that communicates the wind channel to be greater than the width of crack passageway for the air current can form secondary wind pressure in second separation groove, makes the air current of following blowout in the crack passageway more even.

Preferably, the inner wall of the crack channel is provided with a buffer groove downwards, the buffer groove extends along the length direction of the air plate, and the second hot air blocking groove is arranged between the first hot air blocking groove and the buffer groove.

Through adopting above-mentioned technical scheme, the setting up of dashpot makes the air current can obtain the buffering, makes the air current stir, makes the air current size and the air current temperature of spun from the crack passageway all more even.

Preferably, the main body die is provided with a connecting pipe, the main body die further comprises a splitter plate and a plurality of hot nozzles which are both arranged in the die body, the splitter plate is provided with a buffer runner which is respectively communicated with the connecting pipe and the hot nozzles, the buffer runner extends along the length direction of the splitter plate, the buffer runner comprises an upper transverse runner and a lower transverse runner which extend transversely and an arc runner which is communicated with the two transverse runners, and the length of the transverse runner is greater than the inner diameter of the connecting pipe.

Through adopting above-mentioned technical scheme, the setting of buffering runner makes the raw materials can play the effect of buffering to it when flowing through, makes the raw materials can enter into every hot nozzle more evenly for the silk of die head is more even.

In summary, the present application includes at least one of the following beneficial technical effects:

the two air plates on the main body die can move left and right, so that the sizes of the two crack channels can be adjusted to be closer to each other, the sizes of air flows sprayed out from the two crack channels are more uniform, and the die head can spray more uniformly.

Drawings

FIG. 1 is a perspective view of a meltblowing die of an embodiment of the present application.

FIG. 2 is a schematic diagram of the structure of a meltblowing die of an embodiment of the present application.

Fig. 3 is a partially enlarged view of a in fig. 2.

FIG. 4 is a schematic diagram of another embodiment of a meltblowing die.

Description of reference numerals: 1. an air plate; 2. a main body model; 21. a mold body; 22. a slider; 23. a sliding groove; 24. a flow distribution plate; 25. a hot nozzle; 26. a buffer flow channel; 261. a transverse flow passage; 262. an arc-shaped flow passage; 3. a spinneret orifice; 4. an air flow channel; 5. a crack channel; 6. mounting grooves; 7. adjusting screws; 8. locking screws; 9. a threaded hole; 10. a first through hole; 11. fixing screws; 12. a second through hole; 13. a bolt; 14. a first hot air blocking groove; 15. a second hot air blocking groove; 16. a buffer tank; 17. a connecting pipe; 18. a filter plate; 19. and (7) positioning the holes.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The first embodiment.

Referring to fig. 1 and 2, the application embodiment discloses a melt-blowing die head with a hot runner system, which comprises a strip-shaped main body die 2, wherein a connecting pipe 17 is communicated with the middle position of the upper end surface of the main body die 2; the main body mold 2 comprises a mold body 21, a flow distribution plate 24 and a plurality of hot nozzles 25 which are arranged in the mold body 21, a buffer flow passage 26 communicated with the connecting pipe 17 is arranged in the flow distribution plate 24, buffering is performed, the buffer flow passage 26 comprises an upper transverse flow passage 261 and a lower transverse flow passage 261 which transversely extend and an arc-shaped flow passage 262 communicated with the two transverse flow passages 261, the hot nozzles 25 are all positioned below the flow distribution plate 24, each hot nozzle 25 is mutually communicated with the buffer flow passage 26, raw materials entering from the connecting pipe 17 can pass through the buffer flow passage 26 of the flow distribution plate 24 and are continuously distributed into each hot nozzle 25.

Referring to fig. 2 and 3, the main body mold 2 further includes a spinneret plate extending along a length direction of the main body mold 2, the spinneret plate is disposed below the thermal nozzle 25, a plurality of spinneret holes 3 are upwardly formed in a lower end surface of the spinneret plate, the spinneret holes 3 are arranged at intervals along the length direction of the spinneret plate, the spinneret holes 3 are communicated with the thermal nozzle 25, the filter plates 18 are installed between the spinneret plate and the thermal nozzle 25, and the raw material flowing down from the thermal nozzle 25 is ejected through the spinneret holes 3.

The left side and the right side of the die body 21 are respectively provided with a plurality of airflow channels 4, the airflow channels 4 are uniformly arranged along the length direction of the die body 21, the main die 2 further comprises two air plates 1, a crack channel 5 is respectively formed between each air plate 1 and the spinneret plate, the crack channel 5 and the airflow channel 4 on the same side are mutually communicated, and air outlets of the two crack channels 5 face the discharging direction of the spinneret hole 3; the raw material enters from the connecting pipe 17 and is extruded out of the spinneret orifice 3, and meanwhile, hot air flow enters from the air flow channel 4 and is sprayed to the raw material sprayed out of the spinneret orifice 3 from the air outlets of the two crack channels 5 to be drawn and solidified.

As shown in fig. 2, two mounting grooves 6 for mounting the gas plate 1 are provided on the lower end surface of the die body 21, the transverse width of the mounting groove 6 is greater than the transverse width of the gas plate 1, so that the gas plate 1 can move left and right in the mounting groove 6, the main body die 2 further comprises two sliding blocks 22, the two sliding blocks 22 are connected with the die body 21 in a left-right sliding manner respectively, two corresponding sliding grooves 23 are provided on the die body 21, the sides of the two sliding grooves 23 away from each other extend to the outer side wall of the die body 21, the two sliding blocks 22 are fixedly connected with the die body 21 through bolts 13, the adjacent gas plate 1 and sliding block 22 are fixed through an adjusting screw 7 and a locking bolt 13, a threaded hole 9 adapted to the adjusting screw 7 is provided on the sliding block 22, a positioning hole 19 in inserting fit with the adjusting screw 7 is provided on the side of the gas plate 1 close to the adjusting screw 7, the threaded section of the adjusting screw 7 is screwed in, be equipped with first through-hole 10 on slider 22, the screw thread section of locking screw 8 pass first through-hole 10 and with keep away from 1 lateral wall threaded connection of gas plate of crack passageway 5 one side, adjusting screw 7 and locking bolt 13 are provided with a plurality of and establish along slider 22's length direction interval, still be equipped with fixed screw 11 between slider 22 and gas plate 1, fixed screw 11's axis is towards vertical direction, can further fix slider 22 and gas plate 1 in vertical direction through fixed screw 11, be equipped with the second through-hole 12 that fixed screw 11 passed on gas plate 1, threaded connection is realized with slider 22 after first through-hole 10 is passed to fixed screw 11's screw thread section.

As shown in fig. 3, a first hot air blocking groove 14 is formed at an air inlet of the crack channel 5, the first hot air blocking groove 14 extends along the length direction of the air plate 1, the first hot air blocking groove 14 is butted with an air outlet of the air flow channel 4, and hot air flow ejected from the air flow channel 4 is firstly ejected into the first hot air blocking groove 14 to form air pressure; a second hot air blocking groove 15 is formed downwards on the inner wall of the crack channel 5, a communicating air channel is arranged between the first hot air blocking groove 14 and the second hot air blocking groove 15, the second hot air blocking groove 15 and the communicating air channel both extend along the length direction of the air plate 1, the width of the communicating air channel is larger than that of the crack channel 5, hot air flowing into the first hot air blocking groove 14 enters the second hot air blocking groove 15 through the communicating air channel, and because the width of the communicating air channel is larger than that of the crack channel 5, air pressure can be formed at the position where the hot air flows out of the second hot air blocking groove 15; the inner wall of the crack channel 5 is further provided with a buffer groove 16 downwards, and hot air flows sequentially through the air flow channel 4, the first hot air blocking groove 14, the second hot air blocking groove 15, the communicating air duct and the buffer groove 16 and is sprayed out from an air outlet of the crack channel 5.

The installation mode of a melt-blown die head with a hot runner system in the embodiment of the application is as follows: firstly, the flow distribution plate 24 and the spinneret plate are installed in the die body 21, then two sliding blocks 22 are fixed on the die body 21 through the bolts 13, then the main die body 2 is placed upside down to enable the installation groove 6 to face upwards, the gas plate 1 is placed in the installation groove 6, the feeler gauge is plugged in the crack channel 5, the adjusting screw 7 is screwed to enable the inner end of the gas plate to prop against the gas plate 1, then the locking bolt 13 is screwed to enable the gas plate 1 to be fixed on the sliding block 22 through the adjusting screw 7 and the locking bolt 13, the fixing screw 11 is screwed again to enable the gas plate 1 and the sliding block 22 to be further fixed, after the gas plate 1 on one side is adjusted, the gas plate 1 on the other side is also operated in the same way, and the size of the installed crack channel 5 is enabled to be closer in the.

When needing to dismantle and wash crack passageway 5, only need to turn off bolt 13, dismantle slider 22 and gas board 1 are whole from die body 21, wash the surface of gas board 1 and the surface of die body 21 can, need not dismantle gas board 1 and slider 22 for it is more convenient to wash crack passageway 5.

Example two.

Referring to fig. 4, the present embodiment is different from embodiment 1 in that the fixing screw 11 passes through the second through hole 12 and then is fixedly connected to the mold body 21, and when the crack channel 5 is disassembled and cleaned, the fixing screw 11 and the bolt 13 need to be screwed off respectively.

Claims

1. The utility model provides a take hot runner system's melt-blown die head, includes main phantom (2) and two gas boards (1) of setting on main phantom (2), main phantom (2) bottom is equipped with spinneret orifice (3), and two gas boards (1) are symmetrical about the axis of spinneret orifice (3) each other, be equipped with airflow channel (4) in main phantom (2), constitute crack passageway (5) between two gas boards (1) and main phantom (2) respectively, the air intake of two crack passageways (5) docks and communicates with each other with airflow channel (4) respectively, and the air outlet of two crack passageways (5) all faces the ejection of compact direction of spinneret orifice (3), its characterized in that: the main body model (2) is provided with a mounting groove (6) for mounting the gas plates (1), the length of the mounting groove (6) in the connecting line direction of the two gas plates (1) is greater than that of the gas plates (1), the gas plates (1) are fixed with the main body model (2) through adjusting screws (7) and locking screws (8), the main body model (2) is provided with threaded holes (9) matched with the adjusting screws (7), the threaded sections of the adjusting screws (7) are screwed in the threaded holes (9), the inner ends of the threaded sections are tightly abutted to the side wall of one side, far away from the spinneret holes (3), of the gas plates (1), the main body model (2) is provided with first through holes (10), the threaded sections of the locking screws (8) penetrate through the first through holes (10) and are in threaded connection with the side wall of the gas plates (1), far away from one side of the spinneret holes (3), and fixing screws (11) are arranged between the gas plates (1) and the main body model (2), the axis of the fixed screw (11) is parallel to the axis of the spinneret orifice (3), the air plate (1) is provided with a second through hole (12), the thread section of the fixed screw (11) penetrates through the second through hole (12) and is in threaded connection with the main body model (2), a gap is reserved between the inner wall of the second through hole (12) and the outer wall of the fixed screw (11), the main body model (2) comprises a model body (21) and two sliding blocks (22) connected with the model body (21) in a sliding manner, the sliding direction of the sliding blocks (22) is the axis direction of the first through hole (10), the model body (21) is provided with a sliding groove (23) matched with the sliding blocks (22), the sliding groove (23) extends to the outer side wall of the model body (21), the adjacent first through hole (10) and the thread hole (9) are both arranged on the sliding blocks (22) on the same side, and the inner wall of one side, far away from the spinneret orifice (3), of the installation groove (6) is both positioned on the adjacent sliding, the sliding block (22) is fixed with the die body (21) through a bolt (13), and the fixing screw (11) is in threaded connection with the sliding block (22).

2. The meltblowing die head with the hot runner system of claim 1, wherein: first hot-blast separation groove (14) have been seted up down to the inner wall of crack passageway (5), first hot-blast separation groove (14) extend along the length direction of air board (1), first hot-blast separation groove (14) dock with the air outlet of air current passageway (4).

3. The meltblowing die head with the hot runner system of claim 2, wherein: the hot-blast separation groove of second (15) has been down seted up to the inner wall of crack passageway (5), be equipped with the intercommunication wind channel between first hot-blast separation groove (14) and the hot-blast separation groove of second (15), the hot-blast separation groove of second (15) and intercommunication wind channel all extend along the length direction of air sheet (1), the width in intercommunication wind channel is greater than the width of crack passageway (5).

4. The meltblowing die head with the hot runner system of claim 3, wherein: the inner wall of the crack channel (5) is provided with a buffer groove (16) downwards, the buffer groove (16) extends along the length direction of the air plate (1), and the second hot air blocking groove (15) is arranged between the first hot air blocking groove (14) and the buffer groove (16).

5. The meltblowing die head with the hot runner system of claim 4, wherein: the main part mould (2) are equipped with connecting pipe (17), main part mould (2) are still including all setting up flow distribution plate (24) and a plurality of hot nozzle (25) in die body (21), flow distribution plate (24) are equipped with respectively with connecting pipe (17) and hot nozzle (25) the buffering runner (26) that communicate, the length direction of flow distribution plate (24) is followed in buffering runner (26) extends, buffering runner (26) are including upper and lower two horizontal runners (261) that transversely extend and arc runner (262) of two horizontal runners (261) of intercommunication, the length of horizontal runner (261) is greater than the internal diameter of connecting pipe (17).