CN111469464A - Production process and equipment for producing KN95 mask by adopting high-speed rotary die-cutting machine - Google Patents

Abstract

The invention relates to a production process and equipment for producing a KN95 mask by adopting a high-speed rotary die cutting machine, wherein a mask main body of the KN95 mask comprises a first mask body and a second mask body which are symmetrically designed, the KN95 mask main body is produced by adopting the high-speed circular knife machine as a main machine, the mask main body is divided into two symmetrical mask bodies, the mask bodies are compounded, hot-pressed and shaped respectively, then symmetrical hot-pressed and connected, then die cutting is carried out on an outlet mask main body finished product, finally, operations such as ultraviolet disinfection, automatic packaging and the like are carried out in sequence, the whole production process is smoother and faster, the traditional ultrasonic welding operation is abandoned, the production efficiency of the mask can be greatly improved, the operation speed can reach 60m/min, the converted number of the masks can exceed 600pcs/min, the equipment is greatly simplified, the equipment cost is also greatly reduced, and the. The mask body produced by the process and the equipment is matched with the detachable ear belt for use, the ear belt does not need to be assembled by a manufacturer, the ear belt part can be reused, resources are saved, and waste is reduced.

Description

Production process and equipment for KN95 mask production by high-speed rotary die-cutting machine

Technical field:

The invention relates to the technical field of mask production, in particular to a production process and equipment for producing KN95 masks by using a high-speed rotary die-cutting machine.

Background technique:

As an important protective isolation product, masks play an important role in people's daily life and industrial production. Masks have different classifications and different standards according to the occasion and environment of use. The existing KN95 masks are usually produced by ultrasonic welding, which will cause a pause during ultrasonic welding, which will affect the production efficiency; and its production equipment is relatively complex and expensive.

Invention content:

The object of the present invention is to overcome the above-mentioned deficiencies of the prior art, and provide a kind of production technology and equipment thereof that adopts high-speed rotary die-cutting machine to produce KN95 mask.

The technical scheme adopted in the present invention is: a production process of using a high-speed rotary die-cutting machine to produce a KN95 mask. The mask body of the KN95 mask includes a first mask body and a second mask body that are symmetrically designed, and the first mask body and the second mask body are symmetrically designed. The mask body respectively comprises an outer layer of non-woven fabrics, an inner layer of non-woven fabrics and at least one layer of melt-blown cloth located therebetween, and a Nose bridge strip, wherein: described production technique comprises the steps:

Step a: compound the first non-woven fabric strip and at least one first melt-blown cloth strip through the first composite roller group to form the first composite strip, and the first nose bridge strip is intermittently cut by the first nose bridge circular knife to form A first nose bridge strip is automatically transported to the first composite material belt, and is transmitted synchronously with the first composite material belt; and then enters the first heated molding roller set together with the second non-woven material belt to form a semi-closed first mask material belt, the first heated molding roller group forms the first hot-pressing bonding line and the first nose bridge limit frame on the first mask material belt, and the first nose bridge strip is located in the first nose bridge limit frame; A thermocompression bonding line forms a semi-closed bonding line of the first mask body;

At the same time, the third non-woven fabric strip and at least one second melt-blown fabric strip are compounded through the second composite roller group to form the second composite strip, and the second nose bridge strip is intermittently cut by the second nose bridge circular knife to form the second composite strip. The two nose bridge strips are automatically conveyed to the second composite material belt, and are transmitted synchronously with the second composite material belt; then together with the fourth non-woven material belt, enter the second heating and molding roller group to form a semi-closed second mask material belt , the second heat-molding roller group forms the second heat-pressing bonding line and the second nose bridge limit frame on the second mask material strip and makes the second nose bridge positioned in the second nose bridge limit frame; the second heat The pressure bonding line is the semi-closed bonding line that forms the second mask body;

Step b: the formed first mask material belt and the second mask material belt are compounded by the third compounding roller group in an up-down symmetrical manner, and then transported to the third heating and molding roller group to be compounded to form a mask material belt, and the third heating molding is performed. The roller group forms on the mask material belt the third thermal pressure bonding line that bonds the first mask material belt and the second mask material belt, that is, the third thermal pressure bonding line simultaneously makes the first mask body and the second mask body. At the same time, the unclosed edges are bonded and closed and the first mask body and the second mask body are bonded, and the two ends of the third thermocompression bonding line are connected with the first thermocompression bonding line and the second thermocompression bonding line. connected at both ends;

Step c: The composite material belt passing through the third heated molding roller group is transported to the die-cutting roller group, and the die-cutting roller group cuts out the outer frame of the mask and is close to the first and second hot-pressing bonding lines inside the mask Cut out the ear strap holes running through the first mask body and the second mask body in the area of the die-cutting roller group; directly remove the waste of the outer frame at the outlet of the die-cutting roller group to obtain the finished mask body.

The production process further includes step d: the finished product of the mask body after removing the waste from the outer frame is directly transported to an assembly line equipped with an ultraviolet disinfection device for ultraviolet sterilization and disinfection, and then transferred to an automatic packaging machine through a conveyor belt for sealing and packaging.

In the above production process, the first heated molding roller group, the second heated molding roller group, and the third heated molding roller group include heated steel rollers and molded steel rollers, respectively, and the surfaces of the three molded steel rollers respectively have the first heating and molding rollers. The hot-pressing tooth die of the hot-pressing bonding line, the second hot-pressing bonding line, and the third hot-pressing bonding line; The temperature is 135°C ± 5°C.

The mask body includes two layers of melt-blown cloth, that is, two first melt-blown cloth belts and two second melt-blown cloth belts are respectively compounded with the first non-woven material belt and the third non-woven material belt. .

In step a, the first heating and molding roller group and the second heating and molding roller group are respectively hot-pressed to form at least one reinforcing bonding line in the middle region of the mask body of the first mask material belt and the second mask material belt.

The invention also provides a high-speed rotary die-cutting machine for the production of KN95 masks, which comprises a main frame of the high-speed rotary die-cutting machine, the upper part of the main frame is provided with an upper discharge roller bracket, the middle part of the main frame is provided with a functional roller group, and the lower part of the main frame is provided with a high-speed rotary die-cutting machine. There is a lower feeding roller bracket, wherein: the functional roller group sequentially includes a first composite roller group, a first guide transition roller group, a first nose bridge round knife roller group, a first heated molding roller group, a third composite roller group, and a third composite roller group. Two heated molding roller sets, the second nose bridge round knife roller set, the second guide transition roller set, the second composite roller set, the third heated molding roller set, and the die-cutting roller set;

The front end of the lower feeding roller bracket is provided with a first non-woven feeding roller;

The upper feeding roller bracket is sequentially provided with two first meltblown cloth feeding rollers, the first nose bridge feeding roller, the second non-woven feeding roller, the fourth non-woven feeding roller, and the second nose beam feeding roller. Unwinding roller, two second melt-blown cloth unwinding rollers, third non-woven fabric unwinding roller and outer frame waste collecting roller;

Wherein, the first guide transition roller group includes a first composite material belt guide roller and a first nose bridge guide roller, and a first nose bridge is provided between the first guide transition roller group and the first nose bridge round knife roller group Tensioning roller, the discharge side of the first nose bridge round knife roller set is provided with a first composite material belt turning roller;

The first heated molding roller group includes a first heated steel roller located above and a first molded steel roller located below; the third composite roller group is located in the middle of the second non-woven fabric feeding roller and the fourth non-woven fabric feeding roller The position is relatively low; the second heated molding roll group includes a second heating steel roll located above and a second molding steel roll located below;

The second guide transition roller group includes a second composite material belt guide roller and a second nose bridge guide roller, and a second nose bridge tensioner is arranged between the second guide transition roller group and the second nose bridge round knife roller group. Roller, the discharge side of the second nose bridge round knife roll group is provided with a second composite material belt turning roll;

The third heated embossing roll group includes a lower third heated steel roll and an upper third embossed steel roll.

In the above production equipment, six nose bridge knives are evenly arranged on the outer circle of the nose bridge round knife rollers in the first nose bridge round knife roller group and the second nose bridge round knife roller group.

The outer circles of the first and second molded steel rolls are respectively provided with two sets of first/second bonding wire tooth dies for forming the first/second hot-pressing bonding line, and two sets for forming nose bridges. The nose bridge of the limit frame, the limit frame tooth die, the two sets of reinforced bonding line tooth dies for forming the reinforced bonding line; the outer circle of the third molding steel roller is provided with two sets of the third hot pressing bonding line. Three bonding wire tooth die;

The outer circle of the die-cutting roller of the die-cutting roller group is provided with two closed knife molds corresponding to the shape of the mask body and two groups of hole knife films located in the inner area of the closed knife mold and corresponding to the ear strap holes, and the closed knife molds are The outer edge portion of the third thermocompression bonding line is cut off.

In the present invention, a high-speed circular knife machine is used as the main machine to produce the main body of the KN95 mask, the main body of the mask is divided into two symmetrical mask bodies, which are respectively compounded, heat-pressed and shaped, and then symmetrically hot-pressed, and then die-cut out the finished mask body, and finally Ultraviolet disinfection, automatic packaging and other operations, the entire production process is smoother and faster, and the traditional ultrasonic welding operation is abandoned, which can greatly improve the production efficiency of masks, the running speed can reach 60m/min, and the number of mask bodies can exceed 600pcs/ min, and the equipment is greatly simplified, the equipment cost is also greatly reduced, and the production can be automated throughout the process. The mask body produced by the process and equipment of the present invention can be used with detachable ear straps, which does not require manufacturers to assemble the ear straps, saves processes and costs, and is simple and convenient for consumers to use, and different lengths can be selected according to individuality. Or the width of the earband, the earband part can also be reused, saving resources and reducing waste.

Description of drawings:

Fig. 1 is the schematic diagram of the symmetrical folding state of KN95 mask;

Fig. 2 is the flow chart of production technique of the present invention;

Fig. 3 is the flow chart that the production process of the present invention further increases sterilization and automatic packaging.

4 is a schematic view of the unfolded structure of the nose bridge circular knife roller in the present invention;

5 is a schematic view of the unfolded structure of the first and second molded steel rolls in the present invention;

6 is a schematic view of the unfolded structure of the third molded steel roll in the present invention;

Fig. 7 is the unfolded structure schematic diagram of the outer frame die-cutting roller set in the present invention;

FIG. 8 is an effect diagram of the overlapping and superposition of the knife dies in the device of the present invention.

Detailed ways:

As shown in Figure 1-Figure 3, what the present invention is a kind of production technology that adopts high-speed rotary die-cutting machine to produce KN95 mouth mask, the mouth mask main body of KN95 mouth mask comprises the first mask body 1 and the second mask body that are symmetrically designed 2, the first mask body 1 and the second mask body 2 respectively comprise an outer non-woven fabric, an inner non-woven fabric and at least one layer of melt-blown fabric between the two, and the outer non-woven fabric or the inner layer have no A nose bridge is also provided between the spun cloth and the melt-blown cloth, and the production process comprises the following steps:

Step a: Composite the first non-woven fabric tape W1 and at least one first melt-blown fabric tape P1 through the first composite roller group F1 to form a first composite tape S1, the first composite tape S1 is on the first nose bridge. The first nose bridge strip B1 is intermittently cut by the first nose bridge round knife roller set D1 to form a first nose bridge strip and automatically conveyed to the first composite material belt S1, the cut first nose bridge The strip discharge is directly connected with the first composite material belt S1, that is, the first composite material belt S1 is transported to the discharge port of the first nose bridge round knife roller group D1, and is transmitted synchronously with the first composite material belt S1; The non-woven material strips W2 enter the first heating and molding roll group R1 together to form a semi-closed first mask material belt M1, and the first heating and molding roll group R1 forms a first heat-pressing bonding line on the first mask material belt M1. 11 and the first nose bridge limit frame 12 and make the first nose bridge positioned in the first nose bridge limit frame 12; the first thermocompression bonding line 11 forms the semi-closed bonding line of the first mask body 1;

At the same time, the third non-woven fabric belt W3 and at least one second melt-blown cloth belt P2 are compounded by the second compound roller group F2 to form a second compound material belt S2, and the second compound material belt S2 is formed on the second nose bridge strip. The bottom of the belt B2 runs, and the second nose bridge strip B2 is intermittently cut by the second nose bridge round knife roller set D2 to form the second nose bridge strip and automatically conveyed to the second composite material belt S2, synchronizing with the second composite material belt S2 Transmission; then enter the second heating and molding roll group R2 together with the fourth non-woven material belt W4 to form a semi-closed second mask material belt M2, and the second heating and molding roll group R2 forms the second mask material belt M2 on the second mask material belt M2. Two thermocompression bonding lines 21 and the second nose bridge limiting frame 22 make the second nose bridge positioned in the second nose bridge limiting frame 22; the second thermocompression bonding line 21 forms the second mask body 2 Semi-closed bonding line;

Step b: the formed first mask material belt M1 and the second mask material belt M2 are compounded by the third compounding roller group F3 in an up-down symmetrical manner, and then transported to the third heating and pressing roller group R3 to be compounded to form the mask material belt K1, And the 3rd heat-molding roller group R3 forms the 3rd heat-pressing bonding line that bonds the first mask material tape and the second mask material tape on the mask material belt K1, that is, the third hot-compression bonding line 13 simultaneously makes the The unclosed edges of the mask body 1 and the second mask body 2 are bonded and closed at the same time, and the first mask body 1 and the second mask body 2 are bonded together. The two ends of the pressure bonding line 11 and the second hot pressure bonding line 21 are connected;

That is, as shown in Fig. 2 and Fig. 3, the first composite strip S1 and the first nose bridge run from left to right, the second composite strip S2 and the second bridge strip run from right to left, and the third strip in the middle runs from right to left. The compound roller group F3 is symmetrically compounded;

Step c: The composite material belt of the third heating and pressing roller group R3 is transported to the die-cutting roller group Q1. The area of the thermocompression bonding line 21 is cut out through the ear strap holes 101 of the first mask body 1 and the second mask body 2; the outer frame waste is directly removed at the outlet of the die-cutting roller set Q1 and collected by the waste winding roller J1. Roll, the ear strap hole 101 waste is directly removed when punching, and finally the finished product of the mask body is obtained.

The earband part of the mask is detachably assembled and connected to the earband hole of the mask body through the independent earband ends, which can be worn and used by consumers after purchasing and connecting themselves.

The production process further includes step d: the finished product of the mask body after removing the waste from the outer frame is directly transported to the assembly line equipped with the ultraviolet disinfection device 3 for ultraviolet sterilization and disinfection, and then transferred to the automatic packaging machine 5 through the conveyor belt 4 for sealing and packaging.

In the above production process, the first heated and molded roll group R1, the second heated and molded roll group R2, and the third heated and molded roll group R3 include heated steel rolls and molded steel rolls, respectively, and the surfaces of the three molded steel rolls have The hot pressing tooth die for forming the first hot pressing bonding line, the second hot pressing bonding line, and the third hot pressing bonding line; The temperature at the mold was 135°C ± 5°C.

The main body of the mask includes two layers of melt-blown cloth, that is, there are two first melt-blown cloth belts P1, two second melt-blown cloth belts P2 and the first non-woven material belt W1 and the third non-woven cloth respectively. Tape W3 compound.

In step a, the first heating and molding roller group R1 and the second heating molding roller group R2 are respectively hot-pressed in the middle region of the mask main body of the first mask material band M1 and the second mask material band M2 to form at least one reinforcing bond line 15 ( 25), to better position and shape the meltblown cloth and the non-woven layer to make their combination more stable.

4-8 again, the present invention simultaneously provides a high-speed rotary die-cutting machine for the production of a KN95 mask, which comprises a high-speed rotary die-cutting machine main frame (drawing omitted), and the upper part of the main frame is provided with an upper discharge roller. Bracket, a functional roller group is arranged in the middle of the main frame, and a lower discharge roller bracket is arranged in the lower part of the main frame, wherein: the functional roller group sequentially includes a first composite roller group F1, a first guide transition roller group G1, and a first nose bridge round knife roller Group D1, the first heated molding roller group R1, the third composite roller group F3, the second heated molding roller group R2, the second nose bridge round knife roller group D2, the second guide transition roller group G2, the second composite roller group F2, The third heating and molding roller group R3, and the die-cutting roller group Q1;

The front end of the lower feeding roller bracket is provided with a first non-woven feeding roller g1;

The upper feeding roller bracket is sequentially provided with two first melt-blown cloth feeding rollers g2, first nose bridge feeding rollers g3, second non-woven feeding rollers g4, fourth non-woven cloth feeding rollers g5, The second nose bridge strip feeding roller g6, two second melt-blown cloth feeding rollers g7, the third non-woven cloth feeding roller g8 and the outer frame waste feeding roller g9;

Wherein, the first guide transition roller group G1 includes a first composite belt guide roller G11 and a first nose bridge guide roller G12, and between the first guide transition roller group G1 and the first nose bridge round knife roller group D1 is provided with The first nose bridge tensioning roller d11, the discharge side of the first nose bridge round knife roller set D1 is provided with a first composite material belt turning roller d12, and the first composite material belt S1 and the The discharge direction of the first nose bridge strip is roughly flush, so that the first nose bridge strip formed after cutting is automatically transported to the melt-blown cloth of the first composite material belt S1, and then runs synchronously;

The first heating and molding roll group R1 includes the first heating steel roll R11 located above and the first molding steel roll R12 located below; the third composite roll group F3 is located on the second non-woven fabric feeding roll W2 and the fourth non-woven fabric. The middle position of the feeding roller W4 is relatively low; the second heating and molding roller group R2 includes a second heating steel roller R21 located above and a second molding steel roller R22 located below;

In the same way, the second guide transition roller group G2 includes a second composite material belt guide roller G21 and a second nose bridge guide roller G22, and between the second guide transition roller group G2 and the second nose bridge round knife roller group D2 There is a second nose bridge strip tensioning roller d21, and the discharge side of the second nose bridge strip round knife roller set D2 is provided with a second composite material belt turning roller d22, and the second composite material belt S2 is made by the second composite material belt turning roll d22. It is roughly flush with the discharge direction of the second nose bridge strip, so that the second nose bridge strip formed after cutting is automatically transported to the meltblown cloth of the second composite material belt S2, and then runs synchronously;

The third heated embossing roll group R3 includes a lower third heated steel roll R31 and an upper third embossed steel roll R32.

In the above-mentioned production equipment, six nose bridge knives D11 are evenly arranged on the outer circle of the nose bridge round knife rollers in the first nose bridge round knife roller group D1 and the second nose bridge round knife roller group D2.

The outer circles of the first molded steel roll R12 and the second molded steel roll R22 are respectively provided with two sets of first/second bonding lines for forming the first hot pressing bonding line 11/second hot pressing bonding line 21. Wire tooth mold R101, two groups of nose bridge limit frame tooth molds R102 for forming the nose bridge limit frame, two groups of reinforced bonding line tooth molds R103 for forming the reinforcement bonding line 15, and also with the printed "KN95" logo. The outer circle of the third molding steel roller R32 is provided with two sets of third bonding line tooth molds R301 that form the third thermocompression bonding line 13;

The outer circle of the die-cutting roller of the outer frame die-cutting roller group Q1 is provided with two closed knife molds Q101 corresponding to the shape of the main body of the mask and two groups of hole knife films corresponding to the ear strap holes located in the inner area of the closed knife mold Q101. Q102, and closing the die Q101 to cut off the outer edge portion of the third thermocompression bonding line.

In the present invention, a high-speed circular knife machine is used as the main machine to produce the main body of the KN95 mask, the main body of the mask is divided into two symmetrical mask bodies, which are respectively compounded, heat-pressed and shaped, and then symmetrically hot-pressed, and then die-cut out the finished mask body, and finally Ultraviolet disinfection, automatic packaging and other operations, the entire production process is smoother and faster, and the traditional ultrasonic welding operation is abandoned, which can greatly improve the production efficiency of masks, the running speed can reach 20m/min, and the number of mask bodies can exceed 600pcs/ min, and the equipment is greatly simplified, the equipment cost is also greatly reduced, and the production can be automated throughout the process. The mask body produced by the process and equipment of the present invention can be used with detachable ear straps, which does not require manufacturers to assemble the ear straps, saves processes and costs, and is simple and convenient for consumers to use, and different lengths can be selected according to individuality. Or the width of the earband, the earband part can also be reused, saving resources and reducing waste.

It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, without departing from the spirit and essence of the present invention, various modifications and improvements can be made, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (9)

1. A production process using a high-speed rotary die-cutting machine to produce a KN95 mask, the mask main body of the KN95 mask includes a first mask body and a second mask body that are symmetrically designed, and the first mask body and the second mask body respectively include an outer layer The non-woven fabric, the inner layer of non-woven fabric and at least one layer of melt-blown fabric between the two, and a bridge of nose strip is also provided between the outer layer of non-woven fabric or the inner layer of non-woven fabric and the melt-blown fabric, characterized in that : the production process comprises the following steps: Step a: compound the first non-woven fabric strip and at least one first melt-blown cloth strip through the first composite roller group to form the first composite strip, and the first nose bridge strip is intermittently cut by the first nose bridge circular knife to form A first nose bridge strip is automatically transported to the first composite material belt, and is transmitted synchronously with the first composite material belt; and then enters the first heated molding roller set together with the second non-woven material belt to form a semi-closed first mask material belt, the first heated molding roller group forms the first hot-pressing bonding line and the first nose bridge limit frame on the first mask material belt, and the first nose bridge strip is located in the first nose bridge limit frame; A thermocompression bonding line forms a semi-closed bonding line of the first mask body; At the same time, the third non-woven fabric strip and at least one second melt-blown fabric strip are compounded through the second composite roller group to form the second composite strip, and the second nose bridge strip is intermittently cut by the second nose bridge circular knife to form the second composite strip. The two nose bridge strips are automatically conveyed to the second composite material belt, and are transmitted synchronously with the second composite material belt; then together with the fourth non-woven material belt, enter the second heating and molding roller group to form a semi-closed second mask material belt , the second heat-molding roller group forms the second heat-pressing bonding line and the second nose bridge limit frame on the second mask material strip and makes the second nose bridge positioned in the second nose bridge limit frame; the second heat The pressure bonding line is the semi-closed bonding line that forms the second mask body; Step b: the formed first mask material belt and the second mask material belt are compounded by the third compounding roller group in an up-down symmetrical manner, and then transported to the third heating and molding roller group to be compounded to form a mask material belt, and the third heating molding is performed. The roller group forms on the mask material belt the third thermal pressure bonding line that bonds the first mask material belt and the second mask material belt, that is, the third thermal pressure bonding line simultaneously makes the first mask body and the second mask body. At the same time, the unclosed edges are bonded and closed and the first mask body and the second mask body are bonded, and the two ends of the third thermocompression bonding line are connected with the first thermocompression bonding line and the second thermocompression bonding line. connected at both ends; Step c: The composite material belt of the third heated molding roller group is transported to the outer frame die-cutting roller group. The area of the pressure-bonding line is cut out through the ear strap holes of the first mask body and the second mask body; the outer frame waste is directly removed from the outlet of the outer frame die-cutting roller group to obtain the finished mask body. 2. the production technique that adopts high-speed rotary die-cutting machine to produce KN95 mask according to claim 1, is characterized in that: this production technique further comprises step d: the mask main body finished product after excluding the outer frame waste material is directly transported to be installed with ultraviolet disinfection. Ultraviolet sterilization is carried out on the assembly line of the device, and then it is transferred to an automatic packaging machine through a conveyor belt for sealing and packaging. 3. the production technique of adopting high-speed rotary die-cutting machine to produce KN95 mask according to claim 1, is characterized in that: the described first heating molding roller group, the second heating molding roller group, the third heating molding roller group are all respectively It includes a heated steel roll and a molded steel roll, and the surfaces of the three molded steel rolls respectively have a hot-pressing tooth die for forming a first hot-pressing bonding line, a second hot-pressing bonding line, and a third hot-pressing bonding line; and heating The temperature of the steel roll is 100°C±5°C, and the temperature at the hot-pressing tooth die on the molded steel roll is 135°C±5°C. 4. the production technique that adopts high-speed rotary die-cutting machine to produce KN95 mouth mask according to claim 1, is characterized in that: two layers of meltblown cloth are included in the described mouth mask main body, namely corresponding to two first meltblown cloth belts, The two second melt-blown cloth belts are respectively compounded with the first non-woven material belt and the third non-woven material belt. 5. the production technique that adopts high-speed rotary die-cutting machine to produce KN95 mouth mask according to claim 1, is characterized in that: in step a, the first heating and moulding roller group, the second heating and moulding roller group are respectively on the first mask material belt . The middle area of the mask body of the second mask material strip is hot-pressed to form at least one reinforced bonding line. 6. A high-speed rotary die-cutting machine for the production of KN95 masks, which comprises a main frame of the high-speed rotary die-cutting machine, the upper part of the main frame is provided with an upper discharge roller bracket, the middle of the main frame is provided with a functional roller group, and the lower part of the main frame is provided with a lower part. The material roller bracket is characterized in that: the functional roller group sequentially includes a first composite roller group, a first guide transition roller group, a first nose bridge round knife roller group, a first heated molding roller group, a third composite roller group, a first Two heated molding roller sets, the second nose bridge round knife roller set, the second guide transition roller set, the second composite roller set, the third heated molding roller set, and the outer frame die-cutting roller set; The front end of the lower feeding roller bracket is provided with a first non-woven feeding roller; The upper feeding roller bracket is sequentially provided with two first meltblown cloth feeding rollers, the first nose bridge feeding roller, the second non-woven feeding roller, the fourth non-woven feeding roller, and the second nose beam feeding roller. Unwinding roller, two second melt-blown cloth unwinding rollers, third non-woven fabric unwinding roller and outer frame waste collecting roller; Wherein, the first guide transition roller group includes a first composite material belt guide roller and a first nose bridge guide roller, and a first nose bridge is provided between the first guide transition roller group and the first nose bridge round knife roller group Tensioning roller, the discharge side of the first nose bridge round knife roller set is provided with a first composite material belt turning roller; The first heated molding roller group includes a first heated steel roller located above and a first molded steel roller located below; the third composite roller group is located in the middle of the second non-woven fabric feeding roller and the fourth non-woven fabric feeding roller The position is relatively low; the second heated molding roll group includes a second heating steel roll located above and a second molding steel roll located below; The second guide transition roller group includes a second composite material belt guide roller and a second nose bridge guide roller, and a second nose bridge tensioner is arranged between the second guide transition roller group and the second nose bridge round knife roller group. Roller, the discharge side of the second nose bridge round knife roll group is provided with a second composite material belt turning roll; The third heated embossing roll group includes a lower third heated steel roll and an upper third embossed steel roll. 7. high-speed rotary die-cutting machine for KN95 mask production according to claim 6, is characterized in that: outside the nose bridge round knife roller in the described first nose bridge round knife roller group, the second nose bridge round knife roller group There are six nose bridge knives evenly arranged on the circle. 8. The high-speed rotary die-cutting machine for the production of KN95 masks according to claim 6, is characterized in that: the outer circles of the first molded steel roll and the second molded steel roll are respectively provided with two groups to form the first/second Two first/second bonding line tooth molds for hot-pressing bonding lines, two sets of nose bridge limit frame tooth molds for forming nose bridge limit frames, and two sets of reinforced bonding line tooth molds for forming reinforced bonding lines; The outer circumference of the third molding steel roll is provided with two sets of third bonding line tooth dies for forming the third thermocompression bonding line. 9. The high-speed rotary die-cutting machine for the production of KN95 masks according to claim 6, is characterized in that: the outer circle of the die-cutting rollers of the outer-frame die-cutting roller group is provided with two closed knives that are equivalent to the outline of the mask body The die and the two sets of hole-knife films corresponding to the holes of the ear straps are located in the inner area of the closed knife mold, and the closed knife mold cuts the outer edge portion of the third thermocompression bonding line.

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