CN216688430U - Melt-blown die - Google Patents

Abstract

The utility model discloses a melt-blowing die, which belongs to the field of melt-blowing equipment and solves the problem of overhigh processing cost of the melt-blowing die in the prior art, and the technical scheme for solving the problem mainly comprises a left die body and a right die body, wherein the left die body and the right die body are spliced to form a main flow passage through which a high polymer hot melt flows, a spinning nozzle is arranged at the tail end of the main flow passage and is fixed between the left die body and the right die body, the left die body and the spinning nozzle are spliced to form a left spinning hole, the left spinning hole is communicated with the main flow passage, the right die body and the spinning nozzle are spliced to form a right spinning hole, the right spinning hole is communicated with the main flow passage, a left air blowing port is arranged at the left side of the left spinning hole, and a right air blowing port is arranged at the right side of the right spinning hole. The utility model is mainly used for improving the production efficiency of the melt-blown fabric and effectively reducing the processing cost of the melt-blown die.

Description

Melt-blown die

Technical Field

The utility model relates to melt-blowing equipment, in particular to a melt-blowing die.

Background

In the existing melt-blowing die, hundreds, thousands or even thousands of spinneret orifices are generally drilled on a spinneret plate, the diameter of each spinneret orifice is usually 0.1 mm-0.3 mm, and the spinneret orifices are fine and nearly invisible to naked eyes. The current spinneret plate punching process is basically drilling and laser processing, and the processing modes can cause burrs in small holes or rough surfaces, probably cause blockage in continuous flowing jet or influence melt-blowing flow rate to form crystals, and have short service life. The spinneret plate must be polished to polish the holes before use. Therefore, the processing technology of the spinneret orifice is high in requirement, the average processing cost of one spinneret orifice is about 50-80 yuan, the processing cost of the spinneret orifice is very high, the selling price of the melt-blown die is naturally high, the melt-blown die with the length of 600mm can be sold to tens of thousands of yuan, and the equipment purchasing cost is very high for melt-blown cloth manufacturers. In addition, the spinneret plate structure of the melt-blown fabric die head with double rows of nozzles appears in the prior art, for example, the content disclosed in zl202021575484.x also discloses that two rows of spinneret holes arranged in a straight line are arranged on the spinneret plate, although the production efficiency of melt-blown fabric is improved, the spinneret holes are still processed by adopting the existing processing technology, and the problem of high cost of a melt-blown mould is still solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a melt-blowing die which can not only improve the production efficiency of melt-blown cloth, but also effectively reduce the processing cost of the melt-blowing die.

In order to achieve the purpose, the utility model adopts the following technical scheme: the utility model provides a melt-blown mould, including left die body and right die body, left die body forms the sprue that the high polymer hot melt body flows with the concatenation of right die body, the end of sprue is equipped with the spinneret, the spinneret is fixed between left die body and right die body, left die body forms left spinneret orifice with the spinneret concatenation, left spinneret orifice and sprue intercommunication, right die body forms right spinneret orifice with the spinneret concatenation, right spinneret orifice and sprue intercommunication, the left side of left spinneret orifice is equipped with left blowing mouth, the right side of right side spinneret orifice is equipped with right blowing mouth.

Furthermore, the left die body and the right die body are spliced to form a containing cavity for containing the spinning nozzle, the containing cavity is positioned at the tail end of the main flow channel, a left sub-flow channel, a left spinning hole, a right sub-flow channel and a right spinning hole are formed between the cavity wall of the containing cavity and the outer wall of the spinning nozzle, the left spinning hole is communicated with the main flow channel through the left sub-flow channel, and the right spinning hole is communicated with the main flow channel through the right sub-flow channel.

Furthermore, the outer wall of spinning jet includes left side wall, right side wall, and the chamber wall that holds the chamber is including the left inner wall that is located left die body and the right inner wall that is located right die body, and left side wall pastes and forms left spinneret orifice with left inner wall mutually, and right side wall pastes and forms right spinneret orifice with right inner wall mutually.

Furthermore, a left spinning groove is formed in the left side wall, the left spinning grooves are arranged along the axial direction of the spinning head, and a left spinning hole is formed by the left inner wall which is attached to the left side wall and covers the left spinning grooves; or, the left inner wall is provided with left spinning grooves which are arranged along the axial direction of the spinning head, and the left side wall is attached to the left inner wall and covers the left spinning grooves to form left spinning holes.

Furthermore, a right spinning groove is arranged on the right side wall, the right spinning grooves are arranged along the axial direction of the spinning head, and a right spinning hole is formed by the right inner wall which is attached to the right side wall and covers the right spinning grooves; or the right inner wall is provided with right spinning grooves which are arranged along the axial direction of the spinning head, and the right side wall is attached to the right inner wall and covers the right spinning grooves to form right spinning holes.

Furthermore, the cavity wall of the containing cavity extends from left to right to form an arc shape, the projection of the arc shape on the longitudinal section perpendicular to the axial direction of the spinneret is an optimal arc, and the spinneret is clamped and fixed by a left die body and a right die body.

Furthermore, the distance between the inlet end of the left spinneret orifice and the inlet end of the right spinneret orifice is L1, the distance between the outlet end of the left spinneret orifice and the outlet end of the right spinneret orifice is L2, and L1 is not less than L2.

Furthermore, the outer wall of the spinning nozzle is provided with a buffering lug and a plasticizing groove which face the outlet of the main runner, the buffering lug and the plasticizing groove are distributed at intervals in the axial direction of the spinning nozzle, and the main runner is communicated with the left spinning hole and the right spinning hole through the plasticizing groove.

Furthermore, the top surface of the buffering lug is provided with a buffering groove, the buffering groove is just opposite to the outlet of the main runner, and two ends of the buffering groove are communicated with the plasticizing groove.

Furthermore, at least one end of the spinning nozzle is provided with an air inlet, an axially extending air supply channel is arranged in the spinning nozzle, the outer bottom surface of the spinning nozzle is provided with a middle air blowing port for preventing the high polymer hot melt filaments sprayed from the left spinning hole and the right spinning hole from being adhered, and the middle air blowing port is communicated with the air inlet through the air supply channel.

After the technical scheme is adopted, the utility model has the following advantages: the spinneret orifice is formed by splicing two components in a clinging manner, the orifice structure is divided into two parts, for example, one part is a groove structure, the other part is a surface structure, the surface structure covers the groove structure to form the orifice structure, for example, one part is the groove structure, the other part is also the groove structure, the two groove structures are spliced to form the orifice structure, along with the improvement of numerical control machining precision, a connecting gap can not be left after the two parts are spliced to form the orifice structure, the spliced orifice structure can also meet the spinneret orifice requirement, and the groove structure and the surface structure are both open structures, so that the orifice structure is easier to machine and has lower machining cost compared with the orifice structure, and the orifice structure can also be polished in a lower-cost manner. In addition, when the spinneret orifices are blocked, the cleaning is more convenient, and the cleaning cost is reduced. The left spinneret orifice and the right spinneret orifice are formed by splicing, two rows of high polymer hot melt wires can be simultaneously sprayed, the melt-blown efficiency can be doubled, the two rows of high polymer hot melt wires can form a laminated effect, the melt-blown effect is better, the strength of the produced melt-blown cloth is better, and the air permeability is also better.

Drawings

The utility model will be further described with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural view of a meltblowing die of the utility model;

FIG. 2 is a schematic cross-sectional view of a meltblowing die of the utility model;

FIG. 3 is an enlarged view taken at I in FIG. 2;

FIG. 4 is a schematic view (one) of the spinneret of a meltblowing die of the present invention;

FIG. 5 is a schematic view of the spinneret of a meltblowing die of the present invention (two);

fig. 6 is a schematic view of a receiving chamber of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein.

It should be understood that, in various embodiments of the present invention, for example, the sequence numbers related to the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic thereof, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It should be understood that in the present application, "comprising" and "having" and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that, in the present invention, "a plurality" means two or more. "and/or" is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "comprises A, B and C" and "comprises A, B, C" means that A, B, C all comprise, "comprises A, B or C" means comprise one of A, B, C, "comprises A, B and/or C" means comprise any 1 or any 2 or 3 of A, B, C.

The technical means of the present invention will be described in detail with reference to specific examples. The following specific embodiments may be optionally combined with or replaced by each other according to practical situations, and the same or similar concepts or processes may not be described in detail in some embodiments.

The first embodiment is as follows:

as shown in fig. 1 and 2, the present invention provides a melt-blowing mold, which includes a left mold body 11 and a right mold body 12, the left mold body 11 and the right mold body 12 are spliced to form a main flow passage 100 through which a high polymer hot melt flows, a spinneret 2 is disposed at the end of the main flow passage 100, when viewed in fig. 3, the spinneret 2 is clamped and fixed by the left mold body 11 and the right mold body 12, the left mold body 11 and the spinneret 2 are spliced to form a left spinneret hole 201, the left spinneret hole 201 is communicated with the main flow passage 100, the right mold body 12 and the spinneret 2 are spliced to form a right spinneret hole 202, the right spinneret hole 202 is communicated with the main flow passage 100, a left air blowing port 101 is disposed at the left side of the left spinneret hole 201, and a right air blowing port 102 is disposed at the right side of the right spinneret hole 202. The blowing directions of the left air blowing port 101 and the right air blowing port 102 can refer to two straight arrows in fig. 3.

The utility model does not adopt a drilling mode to process spinneret orifices, but utilizes a mode that a left die body 11 and a right die body 12 clamp a spinneret 2 to splice and form a left spinneret orifice 201 and a right spinneret orifice 202, the spinneret orifices are formed by closely splicing and splicing the two parts, the orifice structure is divided into two parts, for example, one part is a groove structure, the other part is a surface structure, the surface structure covers the groove structure to form the orifice structure, for example, one part is the groove structure, the other part is the groove structure, the two groove structures are spliced to form the orifice structure, with the improvement of numerical control processing precision, the two parts can be spliced to form the orifice structure without leaving a connecting gap, the orifice structure formed by splicing can also meet the spinneret requirement, and the groove structure and the surface structure are both open structures, are structures which are easier to process and lower in processing cost compared with the orifices, and can also adopt a lower cost mode to polish, therefore, the utility model can process the spinneret orifices with lower cost, and can obviously and effectively reduce the processing cost of the melt-blown die. In addition, when the spinneret orifices are blocked, the cleaning is more convenient, and the cleaning cost is reduced. And utilize left die body 11 and right die body 12 to press from both sides tight spinneret 2 and splice and form left spinneret orifice 201 and right spinneret orifice 202, can spout two rows of high polymer hot fuses simultaneously, melt-blow efficiency can double, and two rows of high polymer hot fuses can form range upon range of effect moreover, and melt-blow effect is better, and the melt-blown cloth intensity of producing is better, the gas permeability is also better.

It can be understood that, in addition to the clamping and fixing of the spinneret 2 by the left die body 11 and the right die body 12, the fixing can also be realized by the fastening members fixedly connected with the left die body 11 and/or the right die body 12, and the fastening members can generally adopt common parts such as bolts and the like.

The left die body 11 and the right die body 12 are spliced to form a containing cavity 103 for containing the spinneret 2, the containing cavity 103 is positioned at the tail end of the main flow passage 100, a left sub-flow passage 104, a left spinneret orifice 201, a right sub-flow passage 105 and a right spinneret orifice 202 are formed between the cavity wall of the containing cavity 103 and the outer wall of the spinneret 2, the left spinneret orifice 201 is communicated with the main flow passage 100 through the left sub-flow passage 104, and the right spinneret orifice 202 is communicated with the main flow passage 100 through the right sub-flow passage 105. The left die body 11 and the right die body 12 are spliced to form the whole accommodating cavity 103, so that the processing is convenient, the finish processing of the accommodating cavity 103 is completed by one-time clamping, and the processing precision is ensured. For making things convenient for installing and removing of spinneret 2, can design the both ends that hold chamber 103 uncovered, the both ends of melt-blown mould can be equipped with apron 13, and apron 13 covers the tip that holds chamber 103, when needing to pull down spinneret 2 clearance, as long as pull down apron 13, then loosen the connecting bolt of left die body 11 and right die body 12, and need not separate left die body 11 and right die body 12 completely, can take out spinneret 2 from holding chamber 103.

Referring to fig. 4 to 6, since the spinneret holes are not too long, the outer wall of the spinneret 2 may be designed to include a left side wall 21 and a right side wall 22, the cavity wall of the accommodating cavity 103 includes a left inner wall 1031 located in the left die body 11 and a right inner wall 1032 located in the right die body 12, the left side wall 21 is attached to the left inner wall 1031 to form the left spinneret hole 201, and the right side wall 22 is attached to the right inner wall 1032 to form the right spinneret hole 202. The left and right side walls 21 and 22 are only a small part of the outer wall of the spinneret 2, and the lengths of the left and right spinneret holes 201 and 202 can be controlled within a reasonable range.

Specifically, to the manner of forming the spinneret holes, in this embodiment, the left side wall 21 is provided with left spinneret grooves 211, the left spinneret grooves 211 are arranged along the axial direction of the spinneret 2, and the left inner wall 1031 is attached to the left side wall 21 and covers the left spinneret grooves 211 to form the left spinneret holes 201. In another embodiment, left spinneret grooves may also be formed on the left inner wall 1031, the left spinneret grooves are arranged along the axial direction of the spinneret 2, and the left side wall 21 is attached to the left inner wall 1031 and covers the left spinneret grooves to form the left spinneret holes 201. In addition, in the present embodiment, the right side wall 22 is provided with right spinning grooves 221, the right spinning grooves 221 are arranged along the axial direction of the spinneret 2, and the right inner wall 1032 is attached to the right side wall 22 and covers the right spinning grooves 221 to form the right spinning holes 202. In another embodiment, a right spinning groove may be provided on the right inner wall 1032, the right spinning groove is arranged along the axial direction of the spinneret 2, and the right side wall 22 is attached to the right inner wall 1032 and covers the right spinning groove to form the right spinning hole 202. Besides the hole structure formed by splicing the groove structure and the surface structure, the spinneret hole can also be formed by splicing two spinneret groove structures.

Because the spinneret 2 is a bar, the left spinneret groove 211 and the right spinneret groove 221 can be directly turned, whether spiral continuous turning or stepping turning is adopted, a melt-blowing die with the length of 650mm is processed through tests, the processing cost of the spinneret hole part can be controlled below 100 yuan, 930 × 2 spinneret holes are totally obtained, the average processing cost of one spinneret hole is less than 1 angular point, and the processing cost is greatly reduced.

In order to be able to securely fix the spinneret 2 in the receiving chamber 103 and to avoid the need for fastening members to connect the spinneret 2, the present embodiment is designed such that the chamber wall of the receiving chamber 103 extends from left to right in an arc shape and a projection onto a longitudinal section perpendicular to the axial direction of the spinneret 2 is a major arc, for example, a 240 ° major arc as shown in fig. 6. The gravity influence of the spinneret 2 can be overcome by utilizing the major arc structure, the spinneret 2 is supported by the cavity wall of the accommodating cavity 103, and therefore, the spinneret 2 can be fixed and reliable only by splicing the left die body 11 and the right die body 12, and the assembly is very convenient. In addition, the cavity wall of the accommodating cavity 103 is designed into an arc shape, so that a left branch channel 104 and a right branch channel 105 extending in an arc shape can be formed, and the high polymer hot melt can flow into the left spinneret orifice 201 and the right spinneret orifice 202 more smoothly after flowing out of the main channel 100. It is understood that, instead of using an arc structure to support the spinneret 2, other structures, such as a V-shaped structure, an inverted trapezoid structure, etc., capable of overcoming the influence of gravity, may be used to fix the spinneret 2.

The distance between the inlet end of the left spinneret orifice 201 and the inlet end of the right spinneret orifice 202 is L1, the distance between the outlet end of the left spinneret orifice 201 and the outlet end of the right spinneret orifice 202 is L2, in order to control the high polymer thermal fuse not to be excessively dispersed after being sprayed, L1 can be controlled to be more than or equal to L2, for example, L1 is more than L2 in the embodiment, meanwhile, the blowing directions of the left air blowing port 101 and the right air blowing port 102 are converged, so that the high polymer thermal fuse can be sprayed into a limited area, and the quality of the melt-blown fabric is ensured.

Example two:

referring to fig. 4, in order to obtain a sufficient time for the hot melt of the high polymer to have a sufficient plasticizing effect before being discharged, a buffering protrusion 23 and a plasticizing groove 24 facing the outlet of the main flow channel 100 may be provided on the outer wall of the spinneret 2, the buffering protrusion 23 and the plasticizing groove 24 are spaced apart in the axial direction of the spinneret 2, and the main flow channel 100 is communicated with the left and right spinneret holes 201 and 202 through the plasticizing groove 24. The flow speed of the high polymer hot melt in the plasticizing groove 24 is reduced, the plasticizing time is prolonged, the plasticizing effect is better, and the improvement of the melt-blown fabric quality is facilitated.

Referring to fig. 4 and 5, in order to prevent the buffer projection 23 from blocking the outlet of the main flow passage 100 and causing the main flow passage 100 to be blocked, a buffer groove 231 may be provided on the top surface of the buffer projection 23, and the buffer groove 231 faces the outlet of the main flow passage 100 and communicates with the plasticizing groove 24 at both ends. To further improve the buffering effect, buffering protrusions 25 may be further provided on the left and right sides of the outer wall of the spinneret 2. The buffer protrusions 25 and the buffer protrusions 23 are arranged in a staggered manner in the axial direction of the spinneret 2.

Other contents not described in this embodiment may refer to embodiment one.

Example three:

because of the structure of double rows of spinneret orifices, if the base fabric is far away from the left spinneret orifice 201 and the right spinneret orifice 202, the high polymer thermal fuses sprayed from the left spinneret orifice 201 and the right spinneret orifice 202 may be adhered before contacting the base fabric, which affects the quality of the melt-blown fabric, therefore, in this embodiment, a blowing structure is added on the basis of the above embodiment, specifically referring to fig. 4 and 5, an air inlet 26 is arranged at least one end of the spinneret 2, an axially extending air supply channel 27 is arranged in the spinneret 2, an intermediate blowing port 28 for preventing the high polymer thermal fuses sprayed from the left spinneret orifice 201 and the right spinneret orifice 202 from being adhered is arranged on the outer bottom surface of the spinneret 2, and the intermediate blowing port 28 is communicated with the air inlet 26 through the air supply channel 27. The left air blowing port 101 and the middle air blowing port 28 blow the high polymer hot melt spun by the left spinneret orifice 201 to the base cloth, and the right air blowing port 102 and the middle air blowing port 28 blow the high polymer hot melt spun by the right spinneret orifice 202 to the base cloth, so that the adhesion of the two is effectively prevented.

In order to send the wind into the wind channel 27, the cover plate 13 may be provided with a wind inlet connector 14, and the wind inlet connector 14 is connected to the wind inlet 26 and is connected to an external wind source.

In the present embodiment, the intermediate air blowing port 28 is a plurality of through holes separately arranged in a line, and in another embodiment, may be a long through hole.

Other contents not described in the present embodiment may refer to the above-described embodiments.

In the utility model, the spinneret is matched with the lengths of the left die body and the right die body, and the axial direction of the spinneret is the length direction of the spinneret. The left and right directions mentioned in the present invention can be referred to as shown in fig. 2 for clarity of description, and are not limited to the directions in use. Other splicing modes related to the left mold body and the right mold body, the structure of the main flow channel, the structure for forming the left air blowing port and the right air blowing port and the like can refer to the prior art, and are not repeated herein. Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.

Claims (10)

1. The melt-blown mould, including left die body and right die body, left die body forms the sprue that the high polymer hot melt flows with the concatenation of right die body, its characterized in that, the end of sprue is equipped with the spinning jet, and the spinning jet is fixed between left die body and right die body, and left die body forms left spinneret orifice with the splicing of spinning jet, and left spinneret orifice communicates with the sprue, and right die body forms right spinneret orifice with the splicing of spinning jet, and right spinneret orifice communicates with the sprue, and left spinneret orifice's left side is equipped with left blowing mouth, and right spinneret orifice's right side is equipped with right blowing mouth.

2. The melt-blowing die according to claim 1, wherein the left die body and the right die body are spliced to form a containing cavity for containing the spinneret, the containing cavity is positioned at the tail end of the main runner, a left branch runner, a left spinneret orifice, a right branch runner and a right spinneret orifice are formed between the cavity wall of the containing cavity and the outer wall of the spinneret, the left spinneret orifice is communicated with the main runner through the left branch runner, and the right spinneret orifice is communicated with the main runner through the right branch runner.

3. The meltblowing die of claim 2, wherein the outer wall of the spinneret comprises a left side wall and a right side wall, and the wall of the receiving chamber comprises a left inner wall located in the left die body and a right inner wall located in the right die body, the left side wall abutting the left inner wall and forming left orifices, and the right side wall abutting the right inner wall and forming right orifices.

4. The melt-blowing die of claim 3, wherein the left side wall is provided with left spinning grooves which are arranged along the axial direction of the spinneret, and the left inner wall is attached to the left side wall and covers the left spinning grooves to form left spinning holes; or, the left inner wall is provided with left spinning grooves which are arranged along the axial direction of the spinning head, and the left side wall is attached to the left inner wall and covers the left spinning grooves to form left spinning holes.

5. The melt-blowing die of claim 3, wherein the right side wall is provided with right spinning grooves which are arranged along the axial direction of the spinneret, and the right inner wall is attached to the right side wall and covers the right spinning grooves to form right spinning holes; or the right inner wall is provided with right spinning grooves which are arranged along the axial direction of the spinning head, and the right side wall is attached to the right inner wall and covers the right spinning grooves to form right spinning holes.

6. The melt-blowing die of claim 3, wherein the cavity wall of the containing cavity extends from left to right to form an arc shape, the projection of the arc shape on a longitudinal section perpendicular to the axial direction of the spinneret is a major arc, and the spinneret is clamped and fixed by the left die body and the right die body.

7. The meltblowing die of claim 1 or 2, wherein the distance between the inlet ends of the left and right orifices is L1, the distance between the outlet ends of the left and right orifices is L2, and L1 is L2 or more.

8. The melt-blowing die according to claim 1, wherein the outer wall of the spinneret is provided with a buffering lug and a plasticizing groove facing the outlet of the main flow channel, the buffering lug and the plasticizing groove are distributed at intervals in the axial direction of the spinneret, and the main flow channel is communicated with the left spinneret hole and the right spinneret hole through the plasticizing groove.

9. The melt-blowing die according to claim 8, wherein the top surface of the buffering bump is provided with a buffering groove, the buffering groove faces the outlet of the main flow passage, and two ends of the buffering groove are communicated with the plasticizing groove.

10. The melt-blowing die according to claim 1, wherein at least one end of the spinneret is provided with an air inlet, the spinneret is provided with an axially extending air supply channel, the outer bottom surface of the spinneret is provided with a middle air blowing port for preventing the high polymer hot melt filaments sprayed from the left spinneret orifice and the right spinneret orifice from being adhered, and the middle air blowing port is communicated with the air inlet through the air supply channel.

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