CN112245115A - Sanitary towel production is with concentrated light-operated wall from mechanical equipment - Google Patents

Sanitary towel production is with concentrated light-operated wall from mechanical equipment Download PDF

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Publication number
CN112245115A
CN112245115A CN202011159515.8A CN202011159515A CN112245115A CN 112245115 A CN112245115 A CN 112245115A CN 202011159515 A CN202011159515 A CN 202011159515A CN 112245115 A CN112245115 A CN 112245115A
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China
Prior art keywords
embedded
port
heat conduction
evaporation
block
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CN202011159515.8A
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Chinese (zh)
Inventor
李雪芳
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Guangzhou Xinhe Information Technology Co ltd
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Guangzhou Xinhe Information Technology Co ltd
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Priority to CN202011159515.8A priority Critical patent/CN112245115A/en
Publication of CN112245115A publication Critical patent/CN112245115A/en
Withdrawn legal-status Critical Current

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577Apparatus or processes for manufacturing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/30Accessories for evaporators ; Constructional details thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B9/00Auxiliary systems, arrangements, or devices
    • F28B9/08Auxiliary systems, arrangements, or devices for collecting and removing condensate
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577Apparatus or processes for manufacturing
    • A61F2013/15821Apparatus or processes for manufacturing characterized by the apparatus for manufacturing

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

The invention discloses concentrated light-operated wall separation mechanical equipment for sanitary towel production, which structurally comprises a purification tank, an installation base, a controller and a circulating tank, wherein the purification tank is fixedly embedded right above the installation base; the left side and the right side of the upper end of the gathering layer are provided with heat conduction copper sheets, the heat conduction copper sheets are clamped in an I-shaped outer contour, the air temperature inside and outside the gathering layer and the equipment can be effectively neutralized, the temperature difference between the water and the water is formed, water molecules are condensed to be water drops and attached to the lower end face of each heat conduction copper sheet, the water drops are made to drop to the seepage port along the circular-arc lower end face, water stains are removed, the water drops are prevented from dropping to the solution again, and the evaporation and purification time of the solution is prolonged.

Description

Sanitary towel production is with concentrated light-operated wall from mechanical equipment
Technical Field
The invention belongs to the field of sanitary towel equipment, and particularly relates to concentrated light-operated wall separation mechanical equipment for sanitary towel production.
Background
The concentrated light-operated wall is separated from mechanical equipment for producing the sanitary towel, which is equipment for heating a containing barrel continuously in the process of evaporating slurry, leading floccules in primary slurry to enter the state of low-temperature evaporation along with the gradual formation of highly concentrated thick slurry, and leading the floccules in the primary slurry to enter the evaporation which is mild and keeps the continuity, and further leading the purity of the thick slurry of the sanitary towel to be ensured in the concentration process.
Based on the findings of the inventor, the following defects mainly exist in the prior art, such as: when the primary pulp is evaporated, due to the adoption of a chassis heating type evaporation method, the temperature in the barrel is reduced along with the increase of the height of the barrel wall, evaporated water molecules can be contacted with part of the low-temperature inner wall above the evaporation barrel in the floating process, the water molecules are condensed into water drops to be attached to the upper part of the inner wall of the barrel, and along with the increase of the number of the condensed water drops, part of the water drops can be dripped into the evaporation barrel again to be stirred with the primary pulp again, so that the time required for concentrating and purifying the primary pulp is prolonged.
Therefore, a concentrated light control wall separation mechanical device for sanitary towel production needs to be provided.
Disclosure of Invention
In order to solve the problem that when the primary pulp is evaporated by the technology, the temperature in the barrel is reduced along with the increase of the height of the barrel wall due to the adoption of a chassis heating type evaporation method, evaporated water molecules are contacted with part of the lower-temperature inner wall above the evaporation barrel in the floating process, the water molecules are condensed into water drops to be attached to the upper part of the inner wall of the barrel, and part of the water drops drop into the evaporation barrel again to be stirred with the primary pulp along with the increase of the number of the condensed water drops, so that the time required by the concentration and purification of the primary pulp is prolonged.
The invention relates to a purpose and an effect of a concentrated light control wall separation mechanical device for sanitary towel production, which are achieved by the following specific technical means: the purification device structurally comprises a purification tank, a mounting base, a controller and a circulating tank, wherein the purification tank is fixedly embedded right above the mounting base, the upper end face of the mounting base is connected with the controller through welding, the controller is positioned right below the circulating tank, and a piston of the circulating tank is connected to the right side of the upper end of the purification tank; the purification tank comprises a pipeline interface, an exhaust mechanism, a heating plate, stirring blades and a drainage port, wherein the pipeline interface is fixedly embedded in the right side face of the upper end of the exhaust mechanism, the exhaust mechanism is positioned right above the heating plate, the heating plate is symmetrically arranged on the left side and the right side of the stirring blades, the stirring blades are movably clamped and arranged right above the drainage port, and the drainage port is embedded and arranged right below the exhaust mechanism.
The exhaust mechanism comprises a tank wall, a gathering layer, a flow guide mechanism and a drainage mechanism, wherein the end face of the inner side of the tank wall is attached to and connected with the outer side face of the upper end of the gathering layer, the left side and the right side of the lower end of the gathering layer are connected with the flow guide mechanism in an embedded and clamped mode, the flow guide mechanism is installed on the upper end face of the inner side of the exhaust mechanism in an embedded and attached mode, the drainage mechanism is symmetrically installed on the left side and the right side of the lower end of the gathering layer, the gathering layer is provided with an inner layer and an outer layer.
The heat conduction copper sheet is symmetrically arranged on the left side and the right side of the upper end of the cone-shaped block, the cone-shaped block is fixedly embedded right above the air inlet, the air inlet is embedded and clamped on the inner side face of the lower end of the gathering layer, the seepage port is located right below the heat conduction copper sheet, and the heat conduction copper sheet is designed in an I shape.
Wherein, the air inlet includes discharge port, flow cell, refluence hole, collects the mouth, the discharge port is inlayed and is located the refluence hole directly over, the block is being inlayed and is being installed and collecting the mouth to flow cell right side terminal surface, the left end downside that locates the flow cell is inlayed to the refluence hole, it inlays the fixed right side of installing in the refluence hole to collect the mouth, adopt cotton-like fretwork design in the discharge port.
The drainage mechanism comprises a series hole, a second discharge port, a second flow groove, a sponge block and an evaporation mechanism, the series hole is embedded in the left side of the second flow groove, the second discharge port is arranged on the inner side face of the upper end of the drainage mechanism, the second flow groove is embedded and fixedly arranged above the left side of the sponge block, the sponge block is located right above the evaporation mechanism, the evaporation mechanism is embedded and clamped and arranged at the lower end of the right side of the drainage mechanism, and the series hole is connected with a reverse flow hole in the air inlet in series.
The evaporation mechanism comprises a second collection port, a flow hole, a heat conduction block, an evaporation groove and a heat absorption block, the second collection port is fixedly installed above the right side of the heat conduction block in an embedded mode, the flow hole is embedded in the end face of the inner side of the evaporation mechanism, the heat conduction block is fixedly installed on the left side of the flow hole in an embedded mode, the evaporation groove is embedded in the right side below of the second collection port, the heat absorption block is evenly clamped on the end face of the left side of the heat conduction block, and the heat absorption block is arranged in a strip shape and in an equidistant gap mode.
Compared with the prior art, the invention has the following beneficial effects:
1. the left side and the right side of the upper end of the gathering layer are provided with heat conduction copper sheets, the heat conduction copper sheets are clamped in an I-shaped outer contour, the air temperature inside and outside the gathering layer and the equipment can be effectively neutralized, the temperature difference between the water and the water is formed, water molecules are condensed to be water drops and attached to the lower end face of each heat conduction copper sheet, the water drops are made to drop to the seepage port along the circular-arc lower end face, water stains are removed, the water drops are prevented from dropping to the solution again, and the evaporation and purification time of the solution is prolonged.
2. Be equipped with heat conduction piece and heat absorption piece in the evaporation mechanism under the sponge piece, can absorb the high temperature of purification tank inner end downside and transmit to flow hole and evaporation tank in to in the same direction as landing and collect the water stain of mouthful downward flow to evaporation tank department and evaporate, can effectively solve the problem of water droplet backward flow to magma.
Drawings
Fig. 1 is a schematic view of the overall structure of a concentrated light control wall separation mechanical device for producing sanitary napkins.
Fig. 2 is a schematic structural diagram of a concentrated light-operated wall-separation mechanical equipment purification tank for sanitary towel production.
Fig. 3 is a schematic structural diagram of an exhaust mechanism of a concentrated light control wall separation mechanical device for producing a sanitary towel.
Fig. 4 is a schematic structural diagram of a concentrated light control wall-away mechanical device collection layer for sanitary napkin production according to the present invention.
Fig. 5 is a schematic structural diagram of a concentrated light control wall away from an air inlet of a mechanical device for producing a sanitary towel.
Fig. 6 is a schematic structural diagram of a drainage mechanism of a concentrated light control wall separation mechanical device for producing a sanitary towel.
Fig. 7 is a schematic structural diagram of an evaporation mechanism of a concentrated light control wall separation mechanical device for producing sanitary napkins.
In the figure: a purification tank-1, an installation base-2, a controller-3, a circulation tank-4, a pipeline interface-11, an exhaust mechanism-12, a heating plate-13, a stirring blade-14, a drainage port-15, a tank wall-121, a collection layer-122, a flow guide mechanism-123, a drainage mechanism-124, a heat conduction copper sheet-221, a conical block-222 and an air inlet-223, seepage port-224, discharge port-231, flow groove-232, countercurrent hole-233, collection port-234, series hole-241, second discharge port-242, second flow groove-243, sponge block-244, evaporation mechanism-245, second collection port-51, flow hole-52, heat conduction block-53, evaporation groove-54 and heat absorption block-55.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1:
as shown in figures 1 to 5:
the invention provides concentrated light-operated wall separation mechanical equipment for sanitary towel production, which structurally comprises a purification tank 1, an installation base 2, a controller 3 and a circulation tank 4, wherein the purification tank 1 is fixedly embedded and installed right above the installation base 2, the upper end face of the installation base 2 is connected with the controller 3 through welding, the controller 3 is positioned right below the circulation tank 4, and the circulation tank 4 is connected to the right side of the upper end of the purification tank 1 through a piston; the purification tank 1 comprises a pipeline interface 11, an exhaust mechanism 12, a heating plate 13, a stirring blade 14 and a drainage port 15, wherein the pipeline interface 11 is fixedly embedded in the right side surface of the upper end of the exhaust mechanism 12, the exhaust mechanism 12 is positioned right above the heating plate 13, the heating plate 13 is symmetrically arranged on the left side and the right side of the stirring blade 14, the stirring blade 14 is movably clamped and arranged right above the drainage port 15, and the drainage port 15 is embedded and arranged right below the exhaust mechanism 12.
The exhaust mechanism 12 comprises a tank wall 121, a collection layer 122, a flow guide mechanism 123 and a drainage mechanism 124, the inner side end face of the tank wall 121 is attached to the outer side face of the upper end of the collection layer 122, the left side and the right side of the lower end of the collection layer 122 are embedded and clamped to be connected with the flow guide mechanism 123, the flow guide mechanism 123 is embedded, attached to the upper end face of the inner side of the exhaust mechanism 12, the drainage mechanism 124 is symmetrically installed on the left side and the right side of the lower end of the collection layer 122, the collection layer 122 is provided with an inner layer and an outer layer, the upper end face of the inner side is set to be an arc-shaped inner contour, and accordingly condensed water drops.
The gathering layer 122 comprises a heat conduction copper sheet 221, a conical block 222, an air inlet 223 and a seepage port 224, the heat conduction copper sheet 221 is symmetrically installed on the left side and the right side of the upper end of the conical block 222, the conical block 222 is fixedly embedded above the air inlet 223, the air inlet 223 is embedded, clamped and installed on the inner side face of the lower end of the gathering layer 122, the seepage port 224 is located right below the heat conduction copper sheet 221, the heat conduction copper sheet 221 is designed in an I shape, and on the premise that clamping is guaranteed, the heat conduction area is greatly increased, and the air temperature in the gathering layer 122 is reduced.
Wherein, air inlet 223 includes discharge port 231, flowing groove 232, adverse current hole 233, collects mouth 234, discharge port 231 inlays and locates adverse current hole 233 directly over, the block is being inlayed and is being installed and collecting mouth 234 to flowing groove 232 right side terminal surface, adverse current hole 233 inlays and locates the left end downside of flowing groove 232, it inlays the fixed right side of installing in adverse current hole 233 to collect mouth 234, adopt cotton-wool-shaped hollow out design in discharge port 231, with the effect of adsorbing the hydrone under its state of guaranteeing the hydrone flow.
The specific use mode and function of the embodiment are as follows:
in the invention, solution raw materials and water are mixed and placed in a purification tank 1 when in use, a controller 3 is utilized to control the operation of a stirring blade 14 and a heating plate 13 in the purification tank 1, the water in the solution is continuously evaporated along with the rise of the temperature by continuously stirring and heating the solution mixture, so as to improve the purity between the solutions, in the continuous evaporation process of the water, the water vapor can float above the air because the mass of the water vapor is slightly lighter than that of the air, when the water vapor floats, the water vapor can enter a collection layer 122 through an air inlet 223 in the collection layer 122, the left side and the right side of the upper end of the collection layer are provided with heat conduction copper sheets 221, and the heat conduction copper sheets 221 are clamped in an I-shaped outline, so that the temperature of the air inside the collection layer 122 and outside the equipment can be effectively neutralized, the temperature difference between the water molecules is formed, and the water molecules are condensed to form water drops to be attached to the lower end surface of the, the water drops are made to drop to the seepage port 224 along the lower end surface of the circular arc, thereby removing water stains, avoiding the water drops from dropping into the solution again and increasing the evaporation and purification time of the solution.
Example 2:
as shown in fig. 6 to 7: the drainage mechanism 124 comprises a series hole 241, a second discharge port 242, a second flow groove 243, a sponge block 244 and an evaporation mechanism 245, the series hole 241 is embedded in the left side of the second flow groove 243, the second discharge port 242 is arranged on the inner side surface of the upper end of the drainage mechanism 124, the second flow groove 243 is embedded in the upper side of the sponge block 244, the sponge block 244 is located right above the evaporation mechanism 245, the evaporation mechanism 245 is embedded in the lower end of the right side of the drainage mechanism 124 in a clamping manner, the series hole 241 is connected in series with the reverse flow hole 233 in the air inlet 223, and water stains in the reverse flow hole 233 can be effectively guided to flow into the second flow groove 243.
The evaporation mechanism 245 comprises a second collection port 51, a flow hole 52, a heat conduction block 53, an evaporation groove 54 and a heat absorption block 55, the second collection port 51 is fixedly embedded above the right side of the heat conduction block 53, the flow hole 52 is embedded in the inner side end face of the evaporation mechanism 245, the heat conduction block 53 is fixedly embedded in the left side of the flow hole 52, the evaporation groove 54 is embedded below the right side of the second collection port 51, the heat absorption block 55 is uniformly clamped and installed on the left side end face of the heat conduction block 53, the heat absorption blocks 55 are arranged in a strip shape and in an equidistant interval mode, and the heat absorption end faces can be increased through design, so that heat can be evaporated along the heat conduction block 53 to heat and evaporate water stains in the flow hole 52.
The specific use mode and function of the embodiment are as follows:
in the invention, when water stains are discharged downwards into the second flow groove 243 along the second discharge port 242, the water stains flow downwards into the sponge block 244 along the outline of the inner lower end surface of the second flow groove 243, the permeated water stains are adsorbed by the adsorption effect of the sponge block 244, the heat conduction block 53 and the heat absorption block 55 are arranged in the evaporation mechanism 245 arranged below the sponge block 244, the high temperature on the lower side of the inner end of the purification tank 1 can be absorbed and transmitted into the flow hole 52 and the evaporation groove 54, so that the water stains flowing downwards to the evaporation groove 54 along the ground collection port 51 are evaporated, and the problem that water drops flow back to the primary pulp can be effectively solved.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.

Claims (6)

1. A concentrated light control wall separation mechanical device for sanitary towel production structurally comprises a purification tank (1), a mounting base (2), a controller (3) and a circulation tank (4), wherein the purification tank (1) is fixedly embedded above the mounting base (2), the upper end face of the mounting base (2) is connected with the controller (3) through welding, the controller (3) is located right below the circulation tank (4), and the circulation tank (4) is connected to the right side of the upper end of the purification tank (1) in a piston mode; the method is characterized in that:
the purification tank (1) comprises a pipeline interface (11), an exhaust mechanism (12), a heating plate (13), a stirring blade (14) and a drainage port (15), wherein the pipeline interface (11) is fixedly embedded in the right side surface of the upper end of the exhaust mechanism (12), the exhaust mechanism (12) is positioned right above the heating plate (13), the heating plate (13) is symmetrically arranged on the left side and the right side of the stirring blade (14), the stirring blade (14) is movably clamped and arranged right above the drainage port (15), and the drainage port (15) is embedded and arranged right below the exhaust mechanism (12).
2. The concentrated light control wall separation mechanical device for the production of the sanitary towel as claimed in claim 1, wherein the air exhaust mechanism (12) comprises a tank wall (121), a collection layer (122), a flow guide mechanism (123) and a drainage mechanism (124), the inner side end surface of the tank wall (121) is attached and connected to the outer side surface of the upper end of the collection layer (122), the left side and the right side of the lower end of the collection layer (122) are embedded and clamped and connected to the flow guide mechanism (123), the flow guide mechanism (123) is embedded and attached and installed on the inner side upper end surface of the air exhaust mechanism (12), and the drainage mechanism (124) is symmetrically installed on the left side and the right side of the lower end of the collection layer (122).
3. The concentrated light control wall separation mechanical device for the production of the sanitary towel as claimed in claim 2, wherein the collection layer (122) comprises a heat conduction copper sheet (221), a cone-shaped block (222), an air inlet (223) and a seepage port (224), the heat conduction copper sheet (221) is symmetrically installed on the left side and the right side of the upper end of the cone-shaped block (222), the cone-shaped block (222) is fixedly installed right above the air inlet (223), the air inlet (223) is fixedly installed on the inner side surface of the lower end of the collection layer (122) in a clamping mode, and the seepage port (224) is located right below the heat conduction copper sheet (221).
4. The concentrated light control wall separating mechanical device for the production of the sanitary towel as claimed in claim 3, wherein the air inlet (223) comprises a discharge port (231), a flow groove (232), a reverse flow hole (233) and a collecting port (234), the discharge port (231) is embedded and arranged right above the reverse flow hole (233), the collecting port (234) is embedded and clamped on the end face of the right side of the flow groove (232), the reverse flow hole (233) is embedded and arranged on the lower side of the left end of the flow groove (232), and the collecting port (234) is embedded and arranged on the right side of the reverse flow hole (233).
5. The concentrated light control wall-separation mechanical device for the production of the sanitary towel as claimed in claim 2, wherein the drainage mechanism (124) comprises a series hole (241), a second discharge port (242), a second flow groove (243), a sponge block (244) and an evaporation mechanism (245), the series hole (241) is embedded in the left side of the second flow groove (243), the second discharge port (242) is arranged on the inner side surface of the upper end of the drainage mechanism (124), the second flow groove (243) is embedded and installed above the left side of the sponge block (244), the sponge block (244) is positioned right above the evaporation mechanism (245), and the evaporation mechanism (245) is embedded and installed at the lower end of the right side of the drainage mechanism (124).
6. The concentrated light control wall separation mechanical device for the production of the sanitary towel, according to claim 5, the evaporation mechanism (245) comprises a second collection port (51), a flow hole (52), a heat conduction block (53), an evaporation groove (54) and a heat absorption block (55), the second collection port (51) is fixedly embedded above the right side of the heat conduction block (53), the flow hole (52) is embedded in the inner side end face of the evaporation mechanism (245), the heat conduction block (53) is fixedly embedded in the left side of the flow hole (52), the evaporation groove (54) is embedded below the right side of the second collection port (51), and the heat absorption block (55) is uniformly and fixedly embedded in the left side end face of the heat conduction block (53).
CN202011159515.8A 2020-10-27 2020-10-27 Sanitary towel production is with concentrated light-operated wall from mechanical equipment Withdrawn CN112245115A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011159515.8A CN112245115A (en) 2020-10-27 2020-10-27 Sanitary towel production is with concentrated light-operated wall from mechanical equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011159515.8A CN112245115A (en) 2020-10-27 2020-10-27 Sanitary towel production is with concentrated light-operated wall from mechanical equipment

Publications (1)

Publication Number Publication Date
CN112245115A true CN112245115A (en) 2021-01-22

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Application Number Title Priority Date Filing Date
CN202011159515.8A Withdrawn CN112245115A (en) 2020-10-27 2020-10-27 Sanitary towel production is with concentrated light-operated wall from mechanical equipment

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112957177A (en) * 2021-01-31 2021-06-15 南京林榆晋商贸有限公司 Nutrient whitening sanitary towel concentration equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112957177A (en) * 2021-01-31 2021-06-15 南京林榆晋商贸有限公司 Nutrient whitening sanitary towel concentration equipment

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