CN212293868U

CN212293868U - Melt-blown die

Info

Publication number: CN212293868U
Application number: CN202020580110.0U
Authority: CN
Inventors: 李勇军
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-18
Filing date: 2020-04-18
Publication date: 2021-01-05
Anticipated expiration: 2030-04-18

Abstract

The utility model provides a melt-blown mould is formed by melting and spouting chamber, hot-blast chamber, melt-blown material runner, hot-blast runner, melt-blown material sprue, hot-blast sprue. The connecting lines of the central points of the melt-spraying cavities on the die are broken lines, and the hot air cavities are annular and surround the melt-spraying cavities. The beneficial effect of this application lies in: 1. no screw, high precision and high strength; 2. the titanium alloy is preferably selected as the material of the die, so that the die is good in wear resistance and long in service life; 3. the sprayed filaments are round and thinner, have better filterability, better uniformity, better air permeability, finer and softer hand feeling and lighter weight.

Description

Melt-blown die

Technical Field

The utility model relates to a melt-blown fabric production process, in particular to the use of medical institutions, civilian use and industrial protection.

Background

Various pollutions exist in the production process of industrial enterprises, and the mask with good air tightness and good air permeability, which is obtained by people, is urgently needed by the market at present, the core of the mask is melt-blown cloth, and the core of the melt-blown cloth is a mold.

Disclosure of Invention

The utility model aims at providing a melt-blown mould.

The technical scheme of the utility model, by melt spout chamber, hot-blast chamber, melt spout material runner, hot-blast runner, melt and spout material sprue, hot-blast sprue and form.

The melt-blown die is made of metal.

The section of the melt-blown cavity is circular, the inner wall of the melt-blown cavity is of a mutant type, the diameter of the feeding part is 1-2 mm, and the diameter of the outlet is 0.1-0.3 mm.

The outlet of the melt-blowing cavity is vertical to the bottom surface of the outlet of the die.

The hot air cavity and the bottom surface of the mold outlet form an angle of 60-85 degrees.

The die is provided with a plurality of melt-blowing cavities, and the distance between the central points of the melt-blowing cavities is 5-10 mm.

The connecting lines of the central points of the multiple melt-spraying cavities on the die are broken lines, and the acute angles of the included angles between the connecting lines of the central points of the multiple melt-spraying cavities and the central line of the die in the length direction are 55-85 degrees.

The section of the hot air cavity is annular and surrounds the outside of the melt-spraying cavity, and the width of the hot air cavity is 1-2 mm.

The melt-blown material main flow passage is communicated with all melt-blown material flow passages, and the melt-blown material flow passages are respectively connected with the melt-blown chamber; the main flow passage of the melt-spraying cavity is externally connected with a metering pump.

The hot air main flow passage is communicated with all the hot air flow passages, and the hot air flow passages are respectively communicated with the hot air cavity; the hot air main flow passage is externally connected with an air heater.

The processing method of the invention comprises the following steps: printing with a 3D metal printer to form a whole with an internal structure, and performing fine machining by using electric spark or electron beam welding.

The utility model has the advantages that:

1.3D printing, forming a whole, having no screw, high precision and high strength;

2. the titanium alloy is preferably selected as the material of the die, so that the die is good in wear resistance and long in service life;

3. the distance between the melt-blown cavities is large, so that the melt-blown materials are not easy to contact and collide after being sprayed and are not adhered;

4. the melt-blown material is uniformly heated and uniformly stressed, and the sprayed filaments are circular; the existing melt-blown die only blows the silk from two sides, and the silk is elliptical when stressed unevenly;

5. hot air is blown around the melt-blowing cavity, the angle is 60-80 degrees, the blown filaments are thinner, and the required air volume is small;

6. the sprayed filaments are round and thinner, and have better filterability;

7. the sprayed filaments are round and thinner, and the uniformity is better;

8. the sprayed filaments are round and thinner, and have better air permeability;

9. the sprayed filaments are round and thinner, and have finer and softer hand feeling;

10. the same filtering effect as that of the existing melt-blown fabric is achieved, and the gram weight of the fabric sprayed by the die is lighter.

Description of the drawings:

FIG. 1 is a schematic view of a melt-blowing chamber, a hot air chamber, and a flow channel, wherein:

1-a melt-spray chamber;

2-hot air cavity;

3-a melt-spray material runner;

4-hot air flow channel;

FIG. 2 is a schematic view of a connecting line of center points of a melt-blowing cavity and a hot air cavity of a mold, wherein:

40-center point line;

41-center line of the length direction of the die;

FIG. 3 is a schematic view of a connection line of center points of a melt-blowing chamber of a conventional mold, in which:

30-existing mold center point line;

FIG. 4 is a schematic view showing a partial enlargement of the melt-blowing chamber, the hot air chamber, and the flow channel, in which:

3-a melt-spray material runner;

4-hot air flow channel;

5-a main melt-blown material flow passage;

6-a hot air main flow channel;

FIG. 5 is a sectional view of a melt-blowing chamber, hot air chamber, and flow channel, wherein:

1-a melt-spray chamber;

2-hot air cavity;

3-a melt-blown cavity runner;

4-hot air cavity flow channel;

11-inner wall of the melt-blown chamber;

20-bottom surface of die outlet;

FIG. 6 is a schematic view of the shape of the inner wall of the meltblowing chamber, wherein:

11-inner wall of the melt-blowing chamber.

The specific implementation mode is as follows:

example 1: the melt-blown die consists of a melt-blown cavity, a hot air cavity, a melt-blown material flow passage, a hot air flow passage, a melt-blown material main flow passage and a hot air main flow passage;

the die is formed by printing titanium alloy by using a 3D printer and performing electron beam finish machining;

the section of the melt-blown cavity is circular, the inner wall of the melt-blown cavity is of a mutant type, the diameter of the feeding part is 2 mm, and the diameter of the outlet part is 0.1 mm;

the outlet of the melt-blowing cavity is vertical to the bottom surface of the outlet of the die, and the hot air cavity and the bottom surface of the outlet of the die form an angle of 80 degrees;

the distance between the central points of each melt-blown cavity on the die is 5 mm;

the acute angle between the connecting line of the central points of the multiple melt-spraying cavities on the die and the central line in the length direction of the die is 78.5 degrees;

the section of the hot air cavity is annular, the hot air cavity surrounds the outside of the melt-spraying cavity, and the width of the hot air cavity is 2 mm;

the melt-blown material main flow passage is communicated with all melt-blown material flow passages, and the melt-blown material flow passages are respectively connected with the melt-blown chamber; the main flow passage of the melt-blown cavity is externally connected with a metering pump;

The above only is the embodiment of the present invention, not so limiting the patent scope of the present invention, all utilize the equivalent structure or equivalent flow transformation that the content of the specification does, or directly or indirectly use in other relevant technical fields, all including the same reason the patent protection scope of the present invention.

Claims

1. The utility model provides a melt-blown mould comprises melt-blown chamber, hot-blast chamber, melt-blown material runner, hot-blast runner, melt-blown material sprue, hot-blast sprue, its characterized in that: the melt-blown die is made of metal; the section of the melt-blown cavity is circular, the inner wall of the melt-blown cavity is of a mutant type, the diameter of the feeding part is 1-2 mm, and the diameter of the outlet part is 0.1-0.3 mm; the outlet of the melt-blown cavity is vertical to the bottom surface of the outlet of the die; the hot air cavity and the bottom surface of the mold outlet form an angle of 60-85 degrees; the die is provided with a plurality of melt-blown cavities, and the distance between the central points of the melt-blown cavities is 5-10 mm; the connecting lines of the central points of the melt-spraying cavities on the die are broken lines, and the acute angle of the included angle between the connecting lines of the central points of the melt-spraying cavities and the central line in the length direction of the die is 55-85 degrees; the section of the hot air cavity is annular and surrounds the outside of the melt-spraying cavity, and the width of the hot air cavity is 1-2 mm.

2. The meltblowing die of claim 1, wherein: the diameter of the feeding part of the melt-blowing cavity is 2 mm, and the diameter of the outlet part of the melt-blowing cavity is 0.1 mm; the hot air cavity and the bottom surface of the mold outlet form an angle of 80 degrees; the distance between the central points of each melt-blown cavity on the die is 5 mm; the acute angle between the connecting line of the central points of the multiple melt-spraying cavities on the die and the central line in the length direction of the die is 78.5 degrees; the width of the cross section of the hot air cavity is 2 mm.