阅读说明：本技术 熔喷布挤出方法 (Melt-blown fabric extrusion method ) 是由 蓝国勇 阮健 于 2020-11-03 设计创作，主要内容包括：本发明公开了一种熔喷布挤出方法,包括使用一种熔喷布挤出机螺杆料筒对熔喷液进行挤出,挤出步骤包括：所述中心转轴正转2分钟,使在所述料筒内的熔喷液大量挤出,所述中心转轴反转20秒,停止转动所述中心转轴1分钟,使残留在所述料筒内的熔喷液回流聚合后,再重复两次以上操作,将所有在所述料筒内的熔喷液得到充分挤出,之后停止即可。本发明与现有技术相比,可以解决现有熔喷布挤出方法对熔喷液挤出效果不好,影响挤出效率的问题。(The invention discloses a melt-blown fabric extrusion method, which comprises the step of extruding melt-blown liquid by using a screw barrel of a melt-blown fabric extruder, wherein the extrusion step comprises the following steps: and rotating the central rotating shaft forward for 2 minutes to extrude a large amount of melt-blown liquid in the material cylinder, rotating the central rotating shaft backward for 20 seconds, stopping rotating the central rotating shaft for 1 minute to ensure that the melt-blown liquid remained in the material cylinder flows back and is polymerized, repeating the operation for more than two times to fully extrude all the melt-blown liquid in the material cylinder, and then stopping. Compared with the prior art, the invention can solve the problems that the existing melt-blown fabric extrusion method has poor extrusion effect on melt-blown liquid and influences the extrusion efficiency.)

1. A melt-blown fabric extrusion method comprises the steps of extruding melt-blown liquid by using a melt-blown fabric extruder screw barrel, wherein the melt-blown fabric extruder screw barrel comprises a barrel sleeved outside a screw, the screw comprises a central rotating shaft and a spiral thread section outside the central rotating shaft, the axial section of the spiral thread section comprises a working surface which is perpendicular to the axial central line of the central rotating shaft and used for extruding melt-blown liquid, and the back surfaces of the top surface and the working surface, and the melt-blown fabric extrusion method is characterized in that: a flexible nesting sleeve is arranged between the outside of the central rotating shaft and the spiral thread section, a spiral groove is formed in the flexible nesting sleeve, and the spiral thread section is connected with the central rotating shaft through the spiral groove embedded in the flexible nesting sleeve; the top surface of the axial section of the spiral thread section is downwards inclined from the working surface to the back surface, and a recessed backflow groove is formed in the working surface of the axial section of the spiral thread section;

the extrusion step comprises: and rotating the central rotating shaft forward for 2 minutes to extrude a large amount of melt-blown liquid in the material cylinder, rotating the central rotating shaft backward for 20 seconds, stopping rotating the central rotating shaft for 1 minute to ensure that the melt-blown liquid remained in the material cylinder flows back and is polymerized, repeating the operation for more than two times to fully extrude all the melt-blown liquid in the material cylinder, and then stopping.

2. The meltblown fabric extrusion process of claim 1 wherein: the backflow groove is an arc-shaped groove.

3. The meltblown fabric extrusion process of claim 1 or 2 wherein: the back surface of the axial section of the helical thread segment is inclined downwards from the top surface to form a wedge-shaped insert inserted into the flexible nested helical groove.

4. The meltblown fabric extrusion process of claim 1 or 2 wherein: the working surface of the axial cross section of the helical thread segment is inclined inwardly from the portion below the return groove.

5. The meltblown fabric extrusion process of claim 3 wherein: the working surface of the axial cross section of the helical thread segment is inclined inwardly from the portion below the return groove.

6. The meltblown fabric extrusion process of claim 5 wherein: the flexible nesting is flexible nesting of elastic polyvinyl chloride.

Technical Field

The invention relates to the technical field of manufacturing of medical mask production equipment, in particular to a melt-blown liquid extrusion method for a melt-blown fabric extruder.

Background

The existing melt-blown liquid extrusion method for the melt-blown fabric extruder generally uses the melt-blown fabric extruder with a screw barrel to extrude melt-blown liquid, the screw barrel generally comprises the barrel sleeved outside the screw, the central rotating shaft and the spiral thread section of the screw are integrated by the same metal material, the screw is generally processed into the spiral thread section by a round rod with large diameter by fine grinding, so the axial section of the spiral thread section is generally rectangular vertical to the axial central line of the central rotating shaft, namely comprises a working surface, a top surface and a back surface of the working surface which are vertical to the axial central line of the central rotating shaft and used for extruding the melt-blown liquid, and the melt-blown liquid is extruded from one end of the barrel to the other end of the barrel by rotating the screw. When the melt-blown liquid is extruded by the spiral thread section with the rectangular axial section, the liquid surface is extruded by the rectangular thread, and the side surface of the rectangle, which is in contact with the liquid surface, is a plane, so that the melt-blown liquid easily enters the top surface of the thread rectangle, namely a gap between the charging barrel and the screw, and is difficult to extrude and convey by the thread with the rectangular axial section, so that when the screw rotates more, the melt-blown liquid remained in the charging barrel is more, the extrusion effect is poor, and the production efficiency is influenced.

Disclosure of Invention

The invention aims to solve the problem that the extrusion effect of melt-blown liquid is not good and the extrusion efficiency is influenced by the conventional melt-blown cloth extrusion method.

In order to solve the problems, the technical scheme of the invention is as follows: the melt-blown fabric extrusion method.

In the above technical solution, a more specific solution may be: the backflow groove is an arc-shaped groove and comprises a melt-blown liquid extruded by a melt-blown fabric extruder screw barrel, the melt-blown fabric extruder screw barrel comprises a barrel sleeved outside a screw, the screw comprises a central rotating shaft and a spiral thread section outside the central rotating shaft, the axial section of the spiral thread section comprises a working surface which is perpendicular to the axial central line of the central rotating shaft and used for extruding the melt-blown liquid, the top surface and the back surface of the working surface are provided, a flexible nesting sleeve is arranged between the outside of the central rotating shaft and the spiral thread section, a spiral groove is arranged in the flexible nesting sleeve, and the spiral thread section is connected with the central rotating shaft through the spiral groove embedded in the flexible nesting sleeve; the top surface of the axial section of the spiral thread section is downwards inclined from the working surface to the back surface, and a recessed backflow groove is formed in the working surface of the axial section of the spiral thread section;

the extrusion step comprises: and rotating the central rotating shaft forward for 2 minutes to extrude a large amount of melt-blown liquid in the material cylinder, rotating the central rotating shaft backward for 20 seconds, stopping rotating the central rotating shaft for 1 minute to ensure that the melt-blown liquid remained in the material cylinder flows back and is polymerized, repeating the operation for more than two times to fully extrude all the melt-blown liquid in the material cylinder, and then stopping.

Further: the back surface of the axial section of the helical thread segment is inclined downwards from the top surface to form a wedge-shaped insert inserted into the flexible nested helical groove.

Further: the working surface of the axial cross section of the helical thread segment is inclined inwardly from the portion below the return groove.

Further: the flexible nesting is flexible nesting of elastic polyvinyl chloride.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. the extruder of the melt-blown fabric extrusion method adopts a split type screw, the central rotating shaft and the spiral thread section are connected by the flexible nesting, the extrusion effect of the spiral thread section is enhanced by the flexible force of the flexible nesting, the spiral thread sections with different axial sections can be replaced when different purposes are used, the universality is improved, or the whole screw does not need to be replaced when the spiral thread section which is easy to wear is worn, only the spiral thread section is replaced, and the process difficulty and the cost are lower when only the spiral thread section is repaired than that of the whole screw; the backflow groove and the working face top on the working face are combined to be the highest position of the inclined top face, so that melt-blown liquid can flow back at the working face without overflowing to the top face, the inclination of the top face forms a backflow face, the melt-blown liquid is not easy to gather on the top face and is easy to be taken away by the next ring thread, and the design of the backflow groove and the inclined top face enables the working face top at the sharpest position to form a cutting edge to cut off the liquid level of the melt-blown liquid, the melt-blown liquid cut off on the working face is smoothly taken away, the extrusion effect of the melt-blown liquid is greatly improved, and the production efficiency is accelerated;

2. according to the extrusion screw rod of the melt-blown fabric extrusion method, the backflow groove of the spiral thread section adopts the arc-shaped groove, so that the backflow effect is increased to the maximum extent, and the backflow obstruction is reduced; the back surface of the axial section of the spiral thread section is inclined downwards from the top surface to form a wedge-shaped insert inserted into the flexible nested spiral groove, so that the whole spiral thread section is convenient to disassemble and assemble; the working surface of the axial section of the spiral thread section is inclined inwards from the part below the reflux groove to form a reflux slope, so that the reflux amount is increased, and the extrusion effect is improved; the flexible nesting of the elastic polyvinyl chloride increases the elasticity of the nesting and ensures the connection strength of the nesting and the spiral thread section.

Drawings

FIG. 1 is a front view of a screw barrel of an inventive melt-blown fabric extruder;

FIG. 2 is an enlarged view at A of FIG. 1;

wherein: the device comprises a charging barrel 1, a central rotating shaft 2, an elastic nesting 3, a spiral groove 3-1, a spiral thread section 4, a working surface 4-1, a top surface 4-2, a back surface 4-3 and a reflux groove 4-4.

Detailed Description

The embodiments of the invention will be described in further detail with reference to the accompanying drawings:

the melt-blown fabric extrusion method comprises the step of extruding melt-blown liquid by using a screw barrel of a melt-blown fabric extruder.

The melt-blown fabric extruder screw charging barrel is shown in figures 1 to 2, and comprises a charging barrel 1 sleeved outside a screw, wherein the screw comprises a central rotating shaft 2 and a spiral thread section 4 outside the central rotating shaft, a flexible nesting 3 is arranged between the outside of the central rotating shaft 2 and the spiral thread section 4, the flexible nesting 3 is provided with a spiral groove 3-1, the spiral thread section 4 is connected with the central rotating shaft 2 by embedding the spiral groove 3-1 of the flexible nesting, a split screw is adopted, the central rotating shaft 2 and the spiral thread section 4 are connected by the flexible nesting 3, the extrusion effect of the spiral thread section 4 is enhanced by the flexible force of the flexible nesting 3, the spiral thread sections 4 with different axial cross sections can be replaced when the screw section with different purposes is used, the universality is improved, or the whole screw is not replaced when the easily worn spiral thread section is worn, only the spiral thread section is replaced, and the process difficulty of only repairing the spiral thread section is smaller than that, the cost is less.

The axial section of the spiral thread section 4 comprises a working surface 4-1 which is perpendicular to the axial central line of the central rotating shaft 2 and used for extruding the melt-blown liquid, a top surface 4-2 and a back surface 4-3 of the working surface, the top surface 4-2 of the axial section of the spiral thread section 4 inclines downwards from the working surface 4-1 to the back surface 4-3, a concave backflow groove 4-4 is arranged on the working surface 4-1 of the axial section of the spiral thread section 4, the backflow groove 4-4 on the working surface and the top of the working surface are the highest position of the inclined top surface, so that the melt-blown liquid can flow back at the working surface 4-1 without overflowing to the top surface 4-2, the inclination of the top surface 4-2 forms a backflow surface, the melt-blown liquid is not easy to gather at the top surface 4-2 and is easy to be taken away by the next ring thread, and the backflow groove 4-4 and the, the working surface top at the sharpest position forms a cutting edge to cut off the melt-blown liquid level, so that the melt-blown liquid cut off on the working surface is smoothly taken away, the extrusion effect of the melt-blown liquid is greatly improved, and the production efficiency is accelerated.

The backflow groove 4-4 is an arc-shaped groove, so that the backflow effect is increased to the maximum extent, and the backflow obstruction is reduced. The back surface 4-3 of the axial section of the spiral thread section is inclined downwards from the top surface 4-2 to form a wedge-shaped insert inserted into the flexible nested spiral groove 3-1, so that the whole spiral thread section can be conveniently disassembled and assembled. The working surface 4-1 of the axial section of the spiral thread section inclines inwards from the part below the backflow groove 4-4, namely inclines towards the back surface to form a backflow slope, the backflow amount is increased, and the extrusion effect is improved. The flexible nesting 3 is flexible nesting of elastic polyvinyl chloride, and the flexible nesting of the elastic polyvinyl chloride increases the elasticity of the nesting and ensures the connection strength of the nesting and the spiral thread section.

The extrusion step comprises: rotating the central rotating shaft 2 forwards for 2 minutes to extrude a large amount of melt-blown liquid in the material cylinder 1, rotating the central rotating shaft 2 backwards for 20 seconds, stopping rotating the central rotating shaft for 1 minute to ensure that the melt-blown liquid remained in the material cylinder 1 is refluxed and polymerized, repeating the operation more than two times to fully extrude all the melt-blown liquid in the material cylinder 1, and then stopping.

The melt-blown fabric extruder screw barrel used in the method has the advantages of good extrusion effect, good universality and easy maintenance and processing, and the method has the advantages of good extrusion effect on melt-blown liquid, simple and convenient operation and easy popularization.