CN112223803A - Mask sheet forming process - Google Patents
Mask sheet forming process Download PDFInfo
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- CN112223803A CN112223803A CN202010977744.4A CN202010977744A CN112223803A CN 112223803 A CN112223803 A CN 112223803A CN 202010977744 A CN202010977744 A CN 202010977744A CN 112223803 A CN112223803 A CN 112223803A
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- mask sheet
- die
- laminated
- raw materials
- mold
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0064—Producing wearing apparel
- B29D99/0071—Masks, e.g. gas masks
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/05—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches protecting only a particular body part
- A41D13/11—Protective face masks, e.g. for surgical use, or for use in foul atmospheres
- A41D13/1107—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape
- A41D13/1138—Protective face masks, e.g. for surgical use, or for use in foul atmospheres characterised by their shape with a cup configuration
Abstract
The invention relates to the field of mask production, in particular to a mask sheet forming process, which comprises the following steps: classifying the raw materials, and feeding the raw materials in a classified manner; singeing at least one layer of raw materials; combining the three layers of raw materials in a laminated manner; conveying the laminated raw materials into a first mold; the first die carries out hot pressing treatment on the boundary outline of the laminated raw materials to obtain a mask sheet semi-finished product; the first die carries out heat setting treatment on the laminated raw materials in the inner ring area of the boundary contour, the mask sheet semi-finished product is synchronously set in the hot pressing process, and the mask sheet semi-finished product is conveyed into the second die; the second die cuts off the semi-finished mask piece in the outer ring area of the boundary outline, and synchronously carries out cooling and shaping treatment to obtain the mask piece.
Description
Technical Field
The invention relates to the field of mask production, in particular to a mask sheet forming process.
Background
The cup-shaped mask is designed for the health of people, and is used for filtering visible or invisible substances harmful to human bodies, so that the cup-shaped mask does not bring unnecessary influence on the human bodies. The cup-shaped mask can effectively prevent the invasion of harmful substances such as dust, bacteria, viruses and the like due to the unique appearance design, so that the cup-shaped mask is widely applied to the mining industry, the construction industry, the casting industry, the grinding pharmaceutical industry, the agricultural gardening industry, the forestry and animal husbandry, the subway engineering, the aluminum operation, the electronic appliance, the instrument manufacturing industry, the food processing industry, the cement factory, the textile factory, the tool hardware factory, the sheet metal grinding, polishing, cutting, the disintegration engineering and the crushing operation, and can effectively prevent harmful pollutants such as nonferrous metals, heavy metals and the like, and block harmful substances such as glass fibers, asbestos and the like.
Compared with a plane mask, the cup-shaped mask has the following advantages:
1. the cup-shaped mask has unique appearance design, the mask and the face have better tightness, and dust and virus cannot easily leak into the mask;
2. the nose pad is designed according with the ergonomic nose, and the soft foam nose pad is arranged in the nose pad, so that the wearing comfort is improved.
The cup-shaped mask is mostly made into 3-layer patterns, and usually, two layers of shaped fabrics (such as non-woven fabrics, shaped cotton, needle punched cotton and the like) are respectively positioned at the inner layer and the outer layer, a filtering material (such as melt-blown filtering cotton) is clamped between the two layers, and 3 layers of hot-press forming is carried out.
Chinese patent CN201911415314.7 discloses a full-automatic cup-shaped mask forming device, which comprises a mold rotating machine, an outer layer heating and forming machine, a middle layer normal temperature forming machine, an inner layer heating and forming machine, an ultrasonic welding machine and a post-process processing machine. A mold rotating machine including a rotation driving source and a turntable connected to the rotation driving source; the outer layer heating and setting machine is positioned on the side of the turntable; the middle-layer normal-temperature setting machine is positioned on the side of the rotary table and is arranged adjacent to the outer-layer heating setting machine; the inner layer heating setting machine is positioned on the side of the turntable and is arranged adjacent to the middle layer normal temperature setting machine; the ultrasonic welding machine is positioned on the side surface of the rotary table and is arranged adjacent to the inner layer heating setting machine; and the post-processing machine is positioned on one side of the ultrasonic welding machine. Through the equipment, the distribution layer is respectively processed and the accessories are installed, so that the cup-shaped mask is fully automatically produced, the production efficiency and the yield of the cup-shaped mask are improved, and the consistency of the mask finished products is ensured.
As described above, when forming an existing mask sheet (mask blank), three layers of materials (inner layer forming material, outer layer forming material, and filter material) are heated and formed, and then the three layers of materials are stacked together to form a laminate, and then the three layers of materials are welded and combined by means of ultrasonic welding, etc. to form the mask sheet. In such a forming mode, the number of process steps and the number of used devices are large, so that the production efficiency of the mask is limited, and the existing capacity cannot be matched with the newly increased demand which is short-term and explosive.
Disclosure of Invention
In order to solve the technical problem, the technical scheme solves the problems that the number of process steps and used equipment needed by ultrasonic welding after lamination combination of each layer of the traditional mask is firstly shaped and then is limited, and the production efficiency of the mask is limited.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a mask sheet forming process is provided, which comprises the following steps:
according to the classification of the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth, raw material feeding is carried out;
singeing one surface of at least one layer of the shaped cloth, and forming granular sintered particles on the singed surface of the shaped cloth;
the three layers of raw materials are combined in a laminated mode to obtain a laminated raw material, wherein one surface, subjected to singeing treatment, of the shaped fabric faces towards the middle layer of filtering material;
conveying the laminated raw materials into a first mold;
determining the boundary contour of the laminated raw materials through hot pressing, wherein the first die comprises a first upper die and a first lower die, the first upper die is provided with a male die, the first lower die is provided with a female die, the first die performs hot pressing treatment on the boundary contour of the laminated raw materials, and the three layers of raw materials are combined together in a sealing mode at the hot pressing temperature to obtain a mask sheet semi-finished product;
the first die carries out heat setting treatment on the laminated raw material in the inner ring area of the boundary profile, and the semi-finished mask sheet is synchronously heat-set in the hot pressing process at the heat setting temperature, wherein the male die is in contact with the inner ring area of the laminated raw material boundary profile, and the inner ring area of the laminated raw material boundary profile is stretched by the male die, so that the inner ring area of the laminated raw material boundary profile is in a pressing and dropping state, and a certain gap is reserved between the inner ring area of the laminated raw material boundary profile and a cavity of the female die;
conveying the mask sheet semi-finished product into a second mold;
and cutting off the semi-finished mask sheet in the outer ring area of the boundary contour by using a second die, and carrying out cooling and shaping treatment on the semi-finished mask sheet in the same step to obtain the mask sheet.
Optionally, the outer layer shaped fabric is a combination of one or more of PP non-woven fabric, shaped cotton and needle punched cotton which are laminated.
Optionally, the inner-layer shaped fabric is a combination of one or more of PP non-woven fabric, shaped cotton and needle-punched cotton which are laminated.
Optionally, the middle layer filtering material is melt-blown filtering cotton.
Optionally, the second die cuts off the semi-finished mask sheet in the outer ring area of the boundary contour, and after the semi-finished mask sheet is cooled and shaped by the same step, the method further comprises the following steps:
removing burrs on the contour edge and the surface of the mask sheet;
and (5) checking whether the appearance of the mask sheet meets the requirements or not, and reserving the qualified mask sheet to carry out subsequent assembly procedures.
Optionally, the singeing rate is 13m/min, and the singeing pressure is 0.2 MPa.
Optionally, when the first mold operates, the temperature of the first upper mold is 185-.
Optionally, the temperature of the second mold during cooling and shaping is 20-22 ℃, and the cooling time is 15 s.
Optionally, at least one layer of raw materials is singed, and the formation of granular sintered particles on the singed raw materials is specifically as follows:
and (4) singeing the outer-layer shaped cloth, and forming granular sintered particles on one surface of the outer-layer shaped cloth.
Optionally, before conveying the laminated raw material into the first mold, the method further includes the following steps:
and pre-pressing the laminated raw materials.
Compared with the prior art, the invention has the beneficial effects that:
the forming process synchronously finishes the hot pressing and the heat setting treatment in the mask piece forming process in a set of die (a first die), saves working hours and reduces required equipment compared with the traditional process of firstly performing heat setting and then performing ultrasonic welding and pressing, is different from the process of shaping three layers of raw materials in the prior art, directly combines three layers of raw materials in a laminated manner after one layer of raw material is singed, the singed raw material can form sintered particles, the sintered particles can be heated and dissolved in the subsequent hot pressing process, a bonding body is formed in the hot pressing process and permeates into the middle layer filtering material and the inner layer shaping cloth to be combined with the middle layer filtering material and the inner layer shaping cloth, the hot pressing edge sealing effect is improved, then the heat setting treatment is completely performed on the laminated raw materials in the first die, and the difference of curvature after the three layers of raw materials are shaped due to different subsequent cooling speeds is avoided, and gaps are reserved between the three layers after superposition, so that the laminating condition between the three layers of raw materials is poor. The mask piece manufactured by the forming process is flat and attractive, the condition of local uplift and edge raising cannot be generated, the fitting performance is good, and the wearing comfort is improved.
Drawings
FIG. 1 is a first schematic view of a mask sheet prepared by the mask sheet forming process of the present invention;
FIG. 2 is a second schematic structural view of a mask sheet prepared by the mask sheet forming process of the present invention;
FIG. 3 is a flow chart of example 1 in a process for forming a mask sheet according to the present invention;
FIG. 4 is a schematic view of example 1 in a process for forming a mask sheet according to the present invention;
FIG. 5 is a flow chart of example 2 in a process for forming a mask sheet according to the present invention;
FIG. 6 is a flowchart of example 3 of a process for forming a mask sheet according to the present invention.
Description of reference numerals:
1-an outer layer;
2-inner layer;
3-arch part.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example 1
Referring to fig. 3, the mask sheet forming process includes the following steps:
s100) dividing raw materials required by mask piece forming into three layers of raw materials, including an outer layer forming cloth, a middle layer filtering material and an inner layer forming cloth, and respectively carrying out classified feeding on the outer layer forming cloth, the middle layer filtering material and the inner layer forming cloth.
Further, in this embodiment, the outer layer shaped fabric is one or a combination of a PP nonwoven fabric, a shaped cotton and a needle punched cotton which are laminated. The inner layer shaped fabric is one or a combination of PP non-woven fabric, shaped cotton and needle punched cotton which are laminated, and the middle layer filtering material is melt-blown filtering cotton.
S200) in the classifying and feeding process, one surface of at least one layer of the sizing cloth is singed, and granular sintered particles are formed on the singed surface of the sizing cloth.
Further, in this example, the rate of the singeing treatment was 13m/min, and the pressure of the singeing treatment was 0.2 MPa. The singeing treatment can adopt singeing rollers which are divided into contact singeing (press singeing) and non-contact singeing (non-press singeing), the temperatures of the two singeing modes are different, and the temperature of the non-contact singeing is higher than that of the non-contact singeing.
Further, in this embodiment, singeing is carried out on the outer layer sizing cloth alone, wherein one side of the outer layer sizing cloth forms granular sintering particles, and the sintering particles can be heated and dissolved in the subsequent hot-pressing process, and form a bonding body in the hot-pressing process, and permeate into the middle layer filtering material and the inner layer sizing cloth, and are combined with the middle layer filtering material and the inner layer sizing cloth, so that the hot-pressing edge sealing effect is improved.
S300) laminating and combining the three layers of raw materials, laminating and combining the three layers of raw materials according to the layering sequence of the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth, preferably laminating the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth from top to bottom in sequence to obtain a laminated raw material, wherein the surface of the sizing cloth subjected to singeing treatment faces the middle layer filtering material. Therefore, the sintered particles formed on the outer-layer sizing cloth can effectively permeate into the middle-layer filtering material and the inner-layer sizing cloth when being heated for the second time.
S400) feeding the laminated raw materials, conveying the laminated raw materials into a first die, and conveying the laminated raw materials into the first die.
S500) determining the hot-pressing boundary outline of the laminated raw materials, wherein the first die comprises a first upper die and a first lower die, the first upper die is provided with a male die, the first lower die is provided with a female die, the first die carries out hot-pressing treatment on the boundary outline of the laminated raw materials, and the three layers of raw materials are combined together at a hot-pressing temperature to obtain a mask sheet semi-finished product.
S600) the first die carries out heat setting treatment on the laminated raw material located in the boundary contour inner ring area, the semi-finished mask sheet is synchronously subjected to heat setting in the hot pressing process at the heat setting temperature, the male die is in contact with the laminated raw material boundary contour inner ring area, the laminated raw material boundary contour inner ring area is stretched by the male die, the laminated raw material boundary contour inner ring area is in a pressing and dropping state, a certain gap is formed between the laminated raw material boundary contour inner ring area and a female die cavity, and referring to fig. 4, the laminated raw material boundary contour inner ring area is in the pressing and dropping state, and an arch portion of the mask sheet is formed.
The first die comprises a first upper die (provided with a male die) and a first lower die (provided with a female die), hot pressing and heat setting of three layers of raw materials are completed in the first die, the hot pressing and the heat setting are synchronously performed, when the first upper die and the first lower die are closed, the male die presses down the female die to form a heat setting area, and the edge of the sunken part of the first lower die is the boundary profile of the hot pressing of the laminated raw materials.
Further, in this embodiment, when the first mold operates, the temperature of the first upper mold is 185 ℃ in 160-. Because the melt-blown filter cotton can be melted at 130 ℃, in the first die, the male die is always fixed and the size of the male die is smaller than that of the female die, when the male die contacts and stretches the inner ring area of the raw material boundary profile after lamination, the arch part can not contact the bottom of the cavity of the female die when the area is stretched and formed into the arch part, and the temperature of the arch part is lower. Through repeated temperature tests, the size of a cavity of the female die is changed, after the first die is completely closed, the gap between the stretched and formed arch part, namely the inner ring area of the laminated raw material boundary profile and the cavity of the female die, reaches a reasonable range, finally the temperature of the laminated raw material boundary profile reaches the temperature capable of melting sintered particles, and the arch part does not reach the melting temperature of the melt-blown fabric, so that the characteristics of the middle-layer filtering material cannot be damaged when the three layers of raw materials are heated and shaped.
S700) feeding the semi-finished mask sheet, conveying the semi-finished mask sheet into a second mold, and conveying the semi-finished mask sheet into the second mold.
S800) cutting off the semi-finished product of the mask sheet in the outer ring area of the boundary contour by using a second die, and carrying out cooling and shaping treatment on the semi-finished product of the mask sheet in the same step to obtain the mask sheet.
The cutting and cooling shaping of the mask semi-finished product are completed in the second die, the cutting is performed along the hot-pressed boundary contour of the mask semi-finished product, the cutting of the mask sheet semi-finished product in the outer ring area of the boundary contour is removed, the required mask sheet shape is obtained, then the mask sheet semi-finished product is conveyed to subsequent process machining equipment to assemble cup-shaped mask sheet accessories, and finally the cup-shaped mask finished product is obtained.
Further, in this embodiment, the temperature of the second mold during the cooling and setting process is 20-22 ℃, and the cooling time is 15 s.
Example 2
Referring to fig. 5, the mask sheet forming process includes the following steps:
s110) dividing raw materials required by mask piece forming into three layers of raw materials, including an outer layer forming cloth, a middle layer filtering material and an inner layer forming cloth, and respectively carrying out classified feeding on the outer layer forming cloth, the middle layer filtering material and the inner layer forming cloth.
Further, in this embodiment, the outer layer shaped fabric is one or a combination of a PP nonwoven fabric, a shaped cotton and a needle punched cotton which are laminated. The inner layer shaped fabric is one or a combination of PP non-woven fabric, shaped cotton and needle punched cotton which are laminated, and the middle layer filtering material is melt-blown filtering cotton.
S210) in the classifying and feeding process, one surface of at least one layer of the sizing cloth is singed, and granular sintered particles are formed on the singed surface of the sizing cloth.
Further, in this example, the rate of the singeing treatment was 13m/min, and the pressure of the singeing treatment was 0.2 MPa. The singeing treatment can adopt singeing rollers which are divided into contact singeing (press singeing) and non-contact singeing (non-press singeing), the temperatures of the two singeing modes are different, and the temperature of the non-contact singeing is higher than that of the non-contact singeing.
Further, in this embodiment, singeing is carried out on the outer layer sizing cloth alone, wherein one side of the outer layer sizing cloth forms granular sintering particles, and the sintering particles can be heated and dissolved in the subsequent hot-pressing process, and form a bonding body in the hot-pressing process, and permeate into the middle layer filtering material and the inner layer sizing cloth, and are combined with the middle layer filtering material and the inner layer sizing cloth, so that the hot-pressing edge sealing effect is improved.
S310) laminating and combining the three layers of raw materials, laminating and combining the three layers of raw materials according to the layering sequence of the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth, preferably laminating the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth from top to bottom in sequence to obtain a laminated raw material, wherein the surface of the sizing cloth subjected to singeing treatment faces the middle layer filtering material. Therefore, the sintered particles formed on the outer-layer sizing cloth can effectively permeate into the middle-layer filtering material and the inner-layer sizing cloth when being heated for the second time.
S410) feeding the laminated raw materials, conveying the laminated raw materials into a first mold, and conveying the laminated raw materials into the first mold.
S510) determining the boundary contour of the raw materials subjected to hot pressing after lamination, wherein the first mold comprises a first upper mold and a first lower mold, the first upper mold is provided with a male mold, the first lower mold is provided with a female mold, the first mold is used for carrying out hot pressing treatment on the boundary contour of the raw materials subjected to lamination, and the three layers of raw materials are combined together in a sealing mode at the hot pressing temperature to obtain a semi-finished mask sheet.
S610) the first die carries out heat setting treatment on the laminated raw material located in the boundary contour inner ring area, the semi-finished mask sheet is synchronously subjected to heat setting in the hot pressing process at the heat setting temperature, the male die is in contact with the laminated raw material boundary contour inner ring area, the laminated raw material boundary contour inner ring area is stretched by the male die, the laminated raw material boundary contour inner ring area is in a pressing and dropping state, a certain gap is formed between the laminated raw material boundary contour inner ring area and a female die cavity, and referring to fig. 4, the laminated raw material boundary contour inner ring area is in the pressing and dropping state, and an arch portion of the mask sheet is formed.
The first die comprises a first upper die (provided with a male die) and a first lower die (provided with a female die), hot pressing and heat setting of three layers of raw materials are completed in the first die, the hot pressing and the heat setting are synchronously performed, when the first upper die and the first lower die are closed, the male die presses down the female die to form a heat setting area, and the edge of the sunken part of the first lower die is the boundary profile of the hot pressing of the laminated raw materials.
Further, in this embodiment, when the first mold operates, the temperature of the first upper mold is 185 ℃ in 160-. Because the melt-blown filter cotton can be melted at 130 ℃, in the first die, the male die is always fixed and the size of the male die is smaller than that of the female die, when the male die contacts and stretches the inner ring area of the raw material boundary profile after lamination, the arch part can not contact the bottom of the cavity of the female die when the area is stretched and formed into the arch part, and the temperature of the arch part is lower. Through repeated temperature tests, the size of a cavity of the female die is changed, after the first die is completely closed, the gap between the stretched and formed arch part, namely the inner ring area of the laminated raw material boundary profile and the cavity of the female die, reaches a reasonable range, finally the temperature of the laminated raw material boundary profile reaches the temperature capable of melting sintered particles, and the arch part does not reach the melting temperature of the melt-blown fabric, so that the characteristics of the middle-layer filtering material cannot be damaged when the three layers of raw materials are heated and shaped.
S710) feeding the semi-finished mask piece, conveying the semi-finished mask piece into a second mold, and conveying the semi-finished mask piece into the second mold.
S810) cutting off the semi-finished product of the mask sheet in the outer ring area of the boundary contour by using a second die, and carrying out cooling and shaping treatment on the semi-finished product of the mask sheet in the same step to obtain the mask sheet.
And cutting and cooling and shaping the mask semi-finished product in a second die, cutting along the hot-pressed boundary contour of the mask semi-finished product, and cutting off the mask sheet semi-finished product in the outer ring area of the boundary contour to obtain the required mask sheet shape.
S910) removing burrs on the contour edge and the surface of the mask sheet.
S1010) checking whether the appearance of the mask piece meets the requirements, keeping the qualified mask piece in the mask piece to perform a subsequent assembly process, conveying the qualified mask piece to subsequent process processing equipment to assemble cup-shaped mask piece accessories, and finally obtaining a cup-shaped mask finished product.
Compared with the molding process of the embodiment 1, after the semi-finished mask sheet is cut and cooled and molded by the second mold, the burr treatment is carried out on the mask sheet so as to better carry out the subsequent treatment
Example 3
Referring to fig. 6, the mask sheet forming process includes the following steps:
s120) dividing raw materials required by mask piece forming into three layers of raw materials, including an outer layer forming cloth, a middle layer filtering material and an inner layer forming cloth, and respectively carrying out classified feeding on the outer layer forming cloth, the middle layer filtering material and the inner layer forming cloth.
Further, in this embodiment, the outer layer shaped fabric is one or a combination of a PP nonwoven fabric, a shaped cotton and a needle punched cotton which are laminated. The inner layer shaped fabric is one or a combination of PP non-woven fabric, shaped cotton and needle punched cotton which are laminated, and the middle layer filtering material is melt-blown filtering cotton.
S220) in the classifying and feeding process, one surface of at least one layer of the sizing cloth is singed, and granular sintered particles are formed on the singed surface of the sizing cloth.
Further, in this example, the rate of the singeing treatment was 13m/min, and the pressure of the singeing treatment was 0.2 MPa. The singeing treatment can adopt singeing rollers which are divided into contact singeing (press singeing) and non-contact singeing (non-press singeing), the temperatures of the two singeing modes are different, and the temperature of the non-contact singeing is higher than that of the non-contact singeing.
Further, in this embodiment, singeing is carried out on the outer layer sizing cloth alone, wherein one side of the outer layer sizing cloth forms granular sintering particles, and the sintering particles can be heated and dissolved in the subsequent hot-pressing process, and form a bonding body in the hot-pressing process, and permeate into the middle layer filtering material and the inner layer sizing cloth, and are combined with the middle layer filtering material and the inner layer sizing cloth, so that the hot-pressing edge sealing effect is improved.
S320), laminating and combining the three layers of raw materials according to the layering sequence of the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth, preferably laminating the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth from top to bottom in sequence to obtain a laminated raw material, wherein the surface of the sizing cloth subjected to singeing treatment faces the middle layer filtering material. Therefore, the sintered particles formed on the outer-layer sizing cloth can effectively permeate into the middle-layer filtering material and the inner-layer sizing cloth when being heated for the second time.
S420) pre-pressing the laminated raw materials, and firstly pressing three layers of raw materials for one time so as to facilitate the subsequent hot pressing treatment.
S520) feeding the laminated raw materials, conveying the laminated raw materials into a first die, and conveying the laminated raw materials into the first die.
S520) determining the hot-pressing boundary outline of the laminated raw materials, wherein the first die comprises a first upper die and a first lower die, the first upper die is provided with a male die, the first lower die is provided with a female die, the first die carries out hot-pressing treatment on the boundary outline of the laminated raw materials, and the three layers of raw materials are combined together in a sealing mode at the hot-pressing temperature to obtain a mask sheet semi-finished product.
S720), the first die carries out heat setting treatment on the laminated raw material in the boundary contour inner ring area, the semi-finished mask sheet is synchronously subjected to heat setting in the hot pressing process at the heat setting temperature, the male die is in contact with the laminated raw material boundary contour inner ring area, the laminated raw material boundary contour inner ring area is stretched by the male die, the laminated raw material boundary contour inner ring area is in a pressing and dropping state, a certain gap is reserved between the laminated raw material boundary contour inner ring area and a female die cavity, and referring to fig. 4, the laminated raw material boundary contour inner ring area is in the pressing and dropping state, and an arch portion of the mask sheet is formed.
The first die comprises a first upper die (provided with a male die) and a first lower die (provided with a female die), hot pressing and heat setting of three layers of raw materials are completed in the first die, the hot pressing and the heat setting are synchronously performed, when the first upper die and the first lower die are closed, the male die presses down the female die to form a heat setting area, and the edge of the sunken part of the first lower die is the boundary profile of the hot pressing of the laminated raw materials.
Further, in this embodiment, in the operation of the first mold, the temperature of the first upper mold is 185-. Because the melt-blown filter cotton can be melted at 130 ℃, in the first die, the male die is always fixed and the size of the male die is smaller than that of the female die, when the male die contacts and stretches the inner ring area of the raw material boundary profile after lamination, the arch part can not contact the bottom of the cavity of the female die when the area is stretched and formed into the arch part, and the temperature of the arch part is lower. Through repeated temperature tests, the size of a cavity of the female die is changed, after the first die is completely closed, the gap between the stretched and formed arch part, namely the inner ring area of the laminated raw material boundary profile and the cavity of the female die, reaches a reasonable range, finally the temperature of the laminated raw material boundary profile reaches the temperature capable of melting sintered particles, and the arch part does not reach the melting temperature of the melt-blown fabric, so that the characteristics of the middle-layer filtering material cannot be damaged when the three layers of raw materials are heated and shaped.
S820) feeding the semi-finished mask piece, conveying the semi-finished mask piece into a second mold, and conveying the semi-finished mask piece into the second mold.
S920) cutting off the semi-finished product of the mask sheet in the outer ring area of the boundary contour by using a second die, and carrying out cooling and shaping treatment on the semi-finished product of the mask sheet in the same step to obtain the mask sheet.
And cutting and cooling and shaping the mask semi-finished product in a second die, cutting along the hot-pressed boundary contour of the mask semi-finished product, and cutting off the mask sheet semi-finished product in the outer ring area of the boundary contour to obtain the required mask sheet shape.
S1020) removing burrs on the contour edge and the surface of the mask sheet.
S1120) checking whether the appearance of the mask sheet meets the requirement, keeping the qualified mask sheet to perform a subsequent assembly process, conveying the qualified mask sheet to subsequent process processing equipment to assemble cup-shaped mask sheet accessories, and finally obtaining a cup-shaped mask finished product.
Compared with the forming process of the embodiment 1 and the embodiment 2, before the laminated raw materials are conveyed into the first die, the laminated raw materials are pressed in advance for one time, so that the first die can conveniently carry out hot pressing and edge sealing on the laminated raw materials.
Referring to fig. 1 and 2, the mask sheet manufactured by the mask sheet forming process of the present invention includes an inner layer 2, an outer layer 1 and an intermediate filter layer (not shown), which are pressed to form a distinct arch portion 3 under the action of a first upper mold of a first mold.
The invention has the beneficial effects that:
the forming process synchronously finishes the hot pressing and the heat setting treatment in the mask piece forming process in a set of die (a first die), saves working hours and reduces required equipment compared with the traditional process of firstly performing heat setting and then performing ultrasonic welding and pressing, is different from the process of shaping three layers of raw materials in the prior art, directly combines three layers of raw materials in a laminated manner after one layer of raw material is singed, the singed raw material can form sintered particles, the sintered particles can be heated and dissolved in the subsequent hot pressing process, a bonding body is formed in the hot pressing process and permeates into the middle layer filtering material and the inner layer shaping cloth to be combined with the middle layer filtering material and the inner layer shaping cloth, the hot pressing edge sealing effect is improved, then the heat setting treatment is completely performed on the laminated raw materials in the first die, and the difference of curvature after the three layers of raw materials are shaped due to different subsequent cooling speeds is avoided, and gaps are reserved between the three layers after superposition, so that the laminating condition between the three layers of raw materials is poor. The mask piece manufactured by the forming process is flat and attractive, the condition of local uplift and edge raising cannot be generated, the fitting performance is good, and the wearing comfort is improved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A forming process of a mask sheet is characterized by comprising the following steps:
according to the classification of the outer layer sizing cloth, the middle layer filtering material and the inner layer sizing cloth, raw material feeding is carried out;
singeing one surface of at least one layer of the shaped cloth, and forming granular sintered particles on the singed surface of the shaped cloth;
the three layers of raw materials are combined in a laminated mode to obtain a laminated raw material, wherein one surface, subjected to singeing treatment, of the shaped fabric faces towards the middle layer of filtering material;
conveying the laminated raw materials into a first mold;
determining the boundary contour of the laminated raw materials through hot pressing, wherein the first die comprises a first upper die and a first lower die, the first upper die is provided with a male die, the first lower die is provided with a female die, the first die performs hot pressing treatment on the boundary contour of the laminated raw materials, and the three layers of raw materials are combined together in a sealing mode at the hot pressing temperature to obtain a mask sheet semi-finished product;
the first die carries out heat setting treatment on the laminated raw material in the inner ring area of the boundary profile, and the semi-finished mask sheet is synchronously heat-set in the hot pressing process at the heat setting temperature, wherein the male die is in contact with the inner ring area of the laminated raw material boundary profile, and the inner ring area of the laminated raw material boundary profile is stretched by the male die, so that the inner ring area of the laminated raw material boundary profile is in a pressing and dropping state, and a certain gap is reserved between the inner ring area of the laminated raw material boundary profile and a cavity of the female die;
conveying the mask sheet semi-finished product into a second mold;
and cutting off the semi-finished mask sheet in the outer ring area of the boundary contour by using a second die, and carrying out cooling and shaping treatment on the semi-finished mask sheet in the same step to obtain the mask sheet.
2. The mask sheet forming process according to claim 1, wherein the outer layer shaped fabric is a combination of one or more of PP non-woven fabric, shaped cotton and needle punched cotton.
3. The mask sheet forming process according to claim 1, wherein the inner layer setting cloth is a combination of one or more of PP non-woven fabric, setting cotton and needle-punched cotton which are laminated.
4. The process of claim 1, wherein the middle layer of filter material is a melt-blown filter cotton.
5. The mask sheet molding process according to claim 1, wherein the second mold cuts off the mask sheet semi-finished product in the outer ring area of the boundary contour, and after the mask sheet semi-finished product is cooled and shaped in the same way, the mask sheet molding process further comprises the following steps:
removing burrs on the contour edge and the surface of the mask sheet;
and (5) checking whether the appearance of the mask sheet meets the requirements or not, and reserving the qualified mask sheet to carry out subsequent assembly procedures.
6. The process of claim 1, wherein the rate of the singeing process is 13m/min and the pressure of the singeing process is 0.2 MPa.
7. The molding process of a mask sheet as claimed in claim 1, wherein when the first mold is operated, the temperature of the first upper mold is 160-185 ℃, the temperature of the first lower mold is 100-145 ℃, the size of the male mold is fixed, the size of the male mold is smaller than that of the female mold, the temperature of the hot pressing treatment is 160-170 ℃, the pressure of the hot pressing is 0.8MPa, and the temperature of the heat setting is m ℃, wherein m is greater than or equal to 100 and less than 130.
8. The process of claim 1, wherein the second mold is cooled to a temperature of 20-22 ℃ for a cooling time of 15 seconds.
9. The mask sheet forming process according to claim 1, wherein at least one layer of raw material is subjected to singeing treatment, and the forming of granular sintered particles on the singed raw material is specifically:
and (4) singeing the outer-layer shaped cloth, and forming granular sintered particles on one surface of the outer-layer shaped cloth.
10. The process of claim 1, wherein the step of delivering the laminated material to the first mold further comprises:
and pre-pressing the laminated raw materials.
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| CN202010977744.4A CN112223803B (en) | 2020-09-17 | 2020-09-17 | Mask sheet forming process |
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| CN202010977744.4A CN112223803B (en) | 2020-09-17 | 2020-09-17 | Mask sheet forming process |
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| CN112223803B CN112223803B (en) | 2022-11-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113089238A (en) * | 2021-04-02 | 2021-07-09 | 张港 | Production of medical gauze mask is with cotton forming device of reciprocating type design |
| WO2022160668A1 (en) * | 2021-01-29 | 2022-08-04 | 泉州市汉威机械制造有限公司 | Arc-shaped cutting method for multi-layer material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108338432A (en) * | 2017-01-22 | 2018-07-31 | 深圳志诚宏业科技有限公司 | MULTILAYER COMPOSITE mask material and preparation method thereof |
| CN109691699A (en) * | 2017-10-21 | 2019-04-30 | 庄锐滨 | A kind of brassiere and production method of one chip mold cup |
| CN208909637U (en) * | 2018-03-21 | 2019-05-31 | 李铁 | A kind of carpet |
-
2020
- 2020-09-17 CN CN202010977744.4A patent/CN112223803B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108338432A (en) * | 2017-01-22 | 2018-07-31 | 深圳志诚宏业科技有限公司 | MULTILAYER COMPOSITE mask material and preparation method thereof |
| CN109691699A (en) * | 2017-10-21 | 2019-04-30 | 庄锐滨 | A kind of brassiere and production method of one chip mold cup |
| CN208909637U (en) * | 2018-03-21 | 2019-05-31 | 李铁 | A kind of carpet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022160668A1 (en) * | 2021-01-29 | 2022-08-04 | 泉州市汉威机械制造有限公司 | Arc-shaped cutting method for multi-layer material |
| CN113089238A (en) * | 2021-04-02 | 2021-07-09 | 张港 | Production of medical gauze mask is with cotton forming device of reciprocating type design |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112223803B (en) | 2022-11-04 |
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