A bottom-venting filling system

Abstract

The application discloses a bottom exhaust filling system, which comprises a material bucket module, a material injection module, a material storage module, a three-way valve module, a filling module, a mold fixing module and a cloth rolling module. The filling needle nozzle of the filling module is arranged vertically upward, which can effectively prevent the dripping and leakage of materials during the filling process, ensure the filling quality of the cosmetics, and ensure the cleanliness and sanitation of the table, thereby facilitating the operation. The cloth rolling is arranged on the lower surface of the fixed pressing plate above the forming mold, and the cloth rolling module is used for rotating and updating the cloth rolling above the forming mold at regular time. On the one hand, the cloth rolling can ensure the smooth exhaust of the gas in the forming mold, avoid the hollow and material body breaking in the mold, make the cosmetic filling more stable, and improve the yield; on the other hand, the cosmetic material body above the forming mold can be prevented from overflowing, and the cleanliness and sanitation of the table can be ensured.

Description

Technical Field

[0001] This invention relates to the field of cosmetic filling technology, and more specifically to a bottom-venting filling system. Background Technology

[0002] The production process of common cream cosmetics generally involves filling, cooling, and molding, such as lipsticks, lip glosses, and eyebrow pencils. However, currently available filling machines have their nozzles facing downwards, leaving residual material in the filling nozzle after filling. This inevitably leads to some degree of dripping or leakage, affecting product quality and causing hygiene problems as the material drips onto the work surface, making it difficult to clean.

[0003] Furthermore, if air appears in the filling cavity during filling, it will cause a hollow space (air inside) in the filling mold, resulting in discontinuous filling and breakage, which in turn leads to an increase in defective products. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a cosmetic filling system with a vertically upward-pointing discharge port and bottom-up filling, thereby solving the problems of dripping and leakage that occur when filling vertically downwards, ensuring product filling quality and a clean work surface. Simultaneously, it can completely expel air from the filling chamber, preventing hollow areas and material breakage within the mold.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A bottom-venting filling system includes a material tank module, an injection module, a storage module, a three-way valve module, a filling module, and a mold fixing module. The material tank module includes a tank for holding cosmetic materials and a stirring mechanism for stirring the materials. The storage module has a storage chamber and several injection chambers. The outlet of the material tank communicates with the storage chamber. The injection module includes a number of piston rods equal to the number of injection chambers, and is driven by a piston rod power device to reciprocate within the injection chambers to achieve the material extraction and filling processes. The three-way valve... The module includes a three-way valve and a three-way valve power unit that drives its rotation. The filling module includes a plurality of filling channels equal in number to the plurality of injection chambers. The outlets of the plurality of filling channels are arranged vertically upward and are equipped with a plurality of filling needles. The three-way valve power unit drives the three-way valve to rotate to switch the connection between the storage chamber and the injection chamber, and to switch the connection between the injection chamber and the corresponding filling channel. The mold fixing module includes a mold support platform for positioning and placing the molding mold, and a fixing plate for fixing and pressing the molding mold.

[0007] Furthermore, the filling system also includes a fabric winding module, which drives the fabric to rotate. The fabric is pressed down and adheres to the upper surface of the molding die along with the fixed pressure plate to expel the gas inside the molding die. The fabric winding module drives the fabric to rotate to refresh the fabric on the upper surface of the molding die during the filling process.

[0008] Furthermore, the material hopper is arranged above the material storage module, the injection module is arranged behind the material storage module, the three-way valve module and the filling module are arranged in sequence in front of the material storage module, the mold support platform is arranged above the filling module, the mold support platform has a number of nozzle through holes equal to the number of filling nozzles and a positioning component for positioning the forming mold, the fixed pressure plate is set directly above the forming mold and is driven to move up and down by the pressure plate power device to press and release the forming mold.

[0009] Furthermore, the material hopper includes an outer shell and an inner liner, with an insulation cavity provided between the outer shell and the inner liner.

[0010] Furthermore, the three-way valve includes a three-way valve seat, the three-way valve seat has a valve cavity inside, the valve cavity is provided with a rotatable three-way valve core, the valve core has a number of T-shaped holes equal to the number of injection chambers; the three-way valve power device drives the three-way valve core to rotate, so as to switch the guidance of the T-shaped holes.

[0011] Furthermore, the rear end of the three-way valve seat has an equal number of first inlets and second inlets, and the front end of the three-way valve seat has an equal number of outlets coaxial with the second inlets. The first inlets are connected to the storage chamber, the second inlets are connected to the injection chambers, and the outlets are connected to the filling channels. The rotation of the three-way valve core connects the first inlets and the second inlets to connect the storage chamber and the injection chambers, and connects the second inlets and the outlets to connect the injection chambers and the filling channels.

[0012] Furthermore, an oil seal is provided inside the valve chamber of the three-way valve between the adjacent first inlet, second inlet and outlet, and the valve core of the three-way valve passes through several oil seals to realize several independent filling modules.

[0013] Furthermore, a second stirring mechanism is provided inside the storage chamber, and is driven by a motor to rotate inside the storage chamber.

[0014] Furthermore, a three-way valve seat is provided between the material barrel and the material storage module to control the flow of the cosmetic material to the material storage chamber.

[0015] A modular bottom-venting filling system includes a material bucket module, an injection module, a storage module, a three-way valve module, a filling module, a mold fixing module, and a fabric rolling module. The material bucket module includes multiple material buckets and corresponding first stirring mechanisms. The storage module has several storage chambers and several injection chambers. Each of the storage chambers has a corresponding second stirring mechanism. The storage chambers are connected to the injection chambers in a one-to-many manner through the rotation of the three-way valve module. The injection module includes a number of piston rods equal to the number of injection chambers, and one or more piston rod power devices. The piston rods are driven by one or more piston rod power devices to reciprocate within the corresponding injection chambers to realize the material extraction and filling process.

[0016] 1. By arranging the filling nozzles of the filling module vertically upward, this invention can effectively prevent dripping and leakage during the filling process, ensuring the filling quality of cosmetics, while also keeping the work surface clean and hygienic, and facilitating operation.

[0017] 2. This invention sets a rolled cloth on the lower surface of a fixed pressure plate above the molding mold, and uses a rolled cloth module to rotate and update the rolled cloth above the molding mold at regular intervals. On the one hand, the rolled cloth ensures that the gas inside the molding mold can be smoothly discharged, avoiding the phenomenon of hollow inside the mold and material breakage, making cosmetic filling more stable and the yield rate higher; on the other hand, it can prevent cosmetic material from overflowing above the molding mold, ensuring the cleanliness and hygiene of the work surface.

[0018] 3. The storage module is equipped with a storage chamber and a filling chamber. The storage chamber also contains a stirring mechanism driven by a motor. The storage chamber is connected to the material. The initial stirring of the cosmetic material by the material, followed by further stirring by the stirring mechanism inside the storage chamber, ensures the fluidity and uniformity of the cosmetic material. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present invention;

[0020] Figure 2 for Figure 1 Front view and cross-sectional direction diagram;

[0021] Figure 3 for Figure 2 Cross-sectional view along the AA direction;

[0022] Figure 4 for Figure 3 Enlarged view of section B;

[0023] Figure 5 for Figure 4 Schematic diagram of valve core rotation;

[0024] The diagram is marked as follows:

[0025] 1. Material Bucket; 101. First Mixing Motor; 2. Injection Module; 201. Piston Rod Power Unit; 202. Piston Rod Adapter Plate; 203. Piston Push Rod; 3. Storage Module; 301. Storage Chamber; 302. Injection Chamber; 303. Second Mixing Motor; 4. Three-Way Valve Module; 401. Three-Way Valve Power Unit; 402. Three-Way Valve; 403. First Inlet; 404. Second Inlet; 405. Three-Way Valve Outlet; 5. Filling Module; 501. Filling Channel; 502. Filling Needle; 6. Molding Mold; 7. Mold Fixing Module; 701. Mold Support Platform; 702. Fixing Pressure Plate; 703. Fabric Rolling Strip Hole; 704. Pressure Plate Power Unit; 705. Adapter Plate; 8. Fabric Rolling Module; 801. Fabric Rolling Motor. 8021. Fabric winding main shaft; 8022. Fabric winding driven shaft; 803. Fabric winding guide shaft; 9. Machine table surface. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] A bottom-venting filling system, such as Figure 1-3 As shown, it includes a material bucket 1, an injection module 2, a storage module 3, a three-way valve module 4, a filling module 5, and a mold fixing module 7.

[0030] like Figure 1and Figure 3 As shown, the material container 1 is used to hold cosmetic materials and includes an outer shell and an inner liner. An insulation layer or cavity is provided between the outer shell and the inner liner to prevent the cosmetic materials inside the inner liner from cooling and solidifying. Further, in one embodiment, an insulation cavity is provided between the outer shell and the inner liner, and the inner liner is heated and insulated by injecting a high-temperature fluid into the insulation cavity. The material container 1 also includes a cosmetic stirring mechanism for stirring the cosmetic materials. The cosmetic stirring mechanism includes a stirring motor 101 and a stirring impeller. The stirring motor drives the stirring impeller to stir the cosmetic materials inside the inner liner.

[0031] like Figure 3 and Figure 4 As shown, the material bucket 1 is arranged above the material storage module 3. The material storage module 3 includes a material storage chamber 301 and several injection chambers 302. The outlet of the material bucket 1 is connected to the material storage chamber 301. The material bucket 1 conveys material into the material storage chamber 301, which is also a material transfer chamber. Therefore, in this invention, a second stirring impeller is also provided inside the material storage chamber 301, and is driven by a second stirring motor 303 to rotate inside the material storage chamber for further stirring. Furthermore, a three-way valve seat is provided between the material bucket 1 and the material storage module 3 to control the opening and closing of the material bucket and the material storage module.

[0032] The filling module 2 is used to extract cosmetic material from the storage chamber 301 into several filling chambers according to the filling demand, and to push the extracted cosmetic material from the filling chambers into the filling module 5 to fill the filling module 5. The filling process is carried out through the filling nozzle of the filling module 5. For this purpose, the filling module 2 includes a piston rod power device 201 and several piston rods 203. The number of several piston rods 203 corresponds to the number of filling chambers 302, and each extends into the filling chamber 302. The piston rod power device 201 synchronously drives the several piston rods 203 to reciprocate in the individual filling chambers to perform the extraction and filling processes. When the piston rod pushes forward, it pushes the cosmetic material from the filling chamber 302 into the filling module 5 for filling. When it moves backward, it extracts the cosmetic material from the storage chamber 301 into the several filling chambers 302 for extraction. In one embodiment, the piston rod power unit 201 is driven by a servo electric cylinder, located behind the material storage module 3, and connected to the piston rod 203 via a piston adapter plate 202. The piston rods are regularly arranged at the front end of the piston adapter plate and extend into the injection chamber 302 one by one. Each piston rod and the injection chamber are sealed with a sealing ring or oil seal to prevent the cosmetic material from being exposed.

[0033] In another embodiment, the storage module 3 has multiple storage chambers inside, each of which is sealed with an oil seal and connected to different material barrels through separate pipelines. Each storage chamber is also connected to several independent injection chambers through a three-way valve, thereby enabling the filling of different materials. This greatly expands the application scenarios of the present invention and enables the filling of different products in the same system.

[0034] Furthermore, in another embodiment, the filling module 2 includes multiple piston rod power devices, which drive one or more piston rods to reciprocate inside the corresponding filling chambers. The movement distance of different piston rods is controlled by software to achieve cosmetic filling of different volumes, forming another modular bottom venting filling system.

[0035] like Figure 3 and Figure 4 As shown, the three-way valve module 4 is arranged between the storage module 3 and the filling module 5. By switching the three-way valve in the three-way valve module, the material extraction process (the process of extracting cosmetic material from the storage chamber into the injection chamber) and the filling process (the process of injecting cosmetic material from the injection chamber into the filling module) are switched. The three-way valve module 4 includes a three-way valve power unit 401 and a three-way valve 402. The three-way valve power unit 401 drives the valve core of the three-way valve 402 to rotate inside its valve chamber, thereby switching the connection between the storage chamber and the injection chamber, and the connection between the injection chamber and the filling module. When the valve core is driven to rotate, connecting the storage chamber and the injection chamber, several piston rods move backward (…). Figure 3 (Moves from center to right) to extract cosmetic material from the storage chamber into several injection chambers for extraction. When the valve core is driven to rotate again, connecting the injection chamber to the filling module 5, several piston rods move forward, pushing the cosmetic material from the injection chambers into several flow channels 501 in the filling module, and filling it into the molding die 6 through the filling nozzle 502 at its upper end.

[0036] The three-way valve 402 includes a three-way valve seat and a three-way valve core. The three-way valve core is disposed in a valve cavity inside the three-way valve seat and is driven to rotate in the valve cavity by a three-way valve power unit to switch the working state of the filling system of the present invention. Preferably, the three-way valve power unit 401 is driven by a cylinder and connected to the valve core through a rotating assembly, which converts the back-and-forth movement of the cylinder into the rotation of the valve core.

[0037] In this invention, the valve core 4021 of the three-way valve has several T-shaped holes at several injection chambers 302. Furthermore, the rear end of the three-way valve seat has an equal number of first inlet ports 403 and second inlet ports 404 at the positions of several injection chambers. Both the first and second inlet ports lead to the valve chamber, and the T-shaped holes allow for the connection or closure of the storage chamber 301 and the injection chamber 302. The first inlet ports 403 connect the storage chamber 301 and the valve chamber, and the second inlet ports 404 connect the valve chamber and the injection chamber 302; each is sealed with a sealing ring. Furthermore, in one embodiment, an oil seal is provided inside the valve cavity between adjacent first or second feed ports, and the valve core passes through several oil seals, thereby ensuring that each individual storage cavity 301, first feed port 403, second feed port 404 and filling cavity 302 are independent of each other, avoiding cross-contamination, and thus adapting to cosmetic filling work with different materials.

[0038] like Figure 4 and Figure 5 As shown, the three-way valve power unit 401 drives the three-way valve core to rotate to Figure 4 As shown, the T-shaped hole faces left, connecting the first feed port 403 and the second feed port 404, thereby connecting the storage chamber 301 and the injection chamber 302. At this time, the piston rod power unit 201 drives the piston rod to move a specified distance to the right (i.e., backward) according to the program settings, thereby drawing a fixed amount of cosmetic material from the storage chamber into the injection chamber. Then, the three-way valve power unit 401 drives the three-way valve core to rotate to... Figure 5 As shown, the T-shaped hole faces downwards, connecting the second inlet 404 and the outlet 405, thereby connecting the injection chamber 302 with the filling channel 501 of the filling module 5. At this time, the piston rod power device drives the piston rod to move to the left (i.e. forward) to a specified distance, thereby pushing the cosmetic material inside the injection chamber into the filling channel and pushing it out through the filling needle at its upper end to carry out the filling work.

[0039] like Figure 3 and Figure 4 As shown, the filling module 5 is arranged at the front end of the three-way valve module 4. Figure 5 The left end of the filling chamber 302 has an equal number of filling channels 501 at the corresponding positions of the filling cavity. In this invention, the filling channels 501 are L-shaped, with their filling outlets facing upwards and regularly distributed. Each filling outlet is equipped with an independent filling nozzle 502. The piston rod 203 pushes the cosmetic material inside the filling cavity 302 out. By switching the three-way valve, the filling cavity 302 is connected to the filling channels 501, thereby pushing the cosmetic fluid out of the filling nozzle for filling.

[0040] Further, the mold fixing module 7 is used to fix the cosmetic molding mold 6, in one embodiment, which is an eyebrow pencil lead molding mold. The mold fixing module 7 is arranged above the filling module 5, including a mold support platform 701 for loading the molding mold 6 and a fixing pressure plate 702 above it. The fixing pressure plate 702 is driven to move up and down by a pressure plate power device 704. Moving downwards, it presses the molding mold 6, and moving upwards, it moves away to remove the molding mold 6. In one embodiment, the pressure plate power device 704 is a downward pressure cylinder, arranged below the machine table 9, and the filling mold 5 is arranged on the machine table or the worktable above the machine. In this embodiment, the injection module 2, the storage module 3, the three-way valve module 4, and the filling module 5 are all fixed on the worktable above the machine, and the mold support platform 701 is close to the top of the filling mold 5. The mold support platform 701 has several needle nozzle through holes for several filling needle nozzles to extend out, and also includes a positioning mechanism for positioning the molding mold 6. The fixed pressure plate 702 is positioned directly above the mold support platform and is connected to the power shaft of the pressure plate power device 704 via several guide pillars, several bearing seats, and a transition plate. The pressure plate power device 704 drives the fixed pressure plate 702 to move up and down above the mold support platform 701 to press and open the molding mold 6. In this embodiment, several bearing seats are arranged on both the machine table 9 and the mold support platform 701. Guide pillars pass through the bearing seats to connect and fix the fixed pressure plate 702 above the filling module and the transition plate below it. A downward pressure cylinder drives the transition plate to move up and down, thereby driving the fixed pressure plate 702 to move up and down.

[0041] The molding die 6 has a number of molding holes for molding cosmetic materials, the same number as the injection cavity. To ensure rapid molding of the cosmetic material, in one embodiment, a cooling module is also included. The cooling module is arranged on the mold support platform to cool and mold the molding die 6.

[0042] like Figure 1 , Figure 3 and Figure 4 As shown, to ensure the stability of the upward filling process and the cleanliness of the work surface, the fixed pressure plate 702 presses down to tighten the eyebrow pencil lead molding die before filling begins. To ensure the smooth discharge of gas inside the molding die, a fabric roll module 8 is designed into the system. The fabric roll module 8 provides breathable fabric to the top of the molding die 6, forming a buffer breathable layer on the upper surface of the molding die and the lower surface of the fixed pressure plate. This ensures that all gas inside the molding die is discharged during the filling process, improving filling quality; it also absorbs any cosmetic material overflowing from the top of the filling die, ensuring the cleanliness of the work surface and the hygiene of the cosmetics.

[0043] Therefore, further, such as Figure 1As shown, the fabric rolling module 8 includes a fabric rolling motor 801, a fabric rolling main shaft 802, a fabric rolling driven shaft 803, and several fabric rolling guide shafts 804. Unused fabric rolls are fixed on the fabric rolling driven shaft 803. Then, the fabric is pulled out and sequentially attached to the several fabric rolling guide shafts 804. It is then guided and transmitted through the fabric rolling guide shafts 804 and passes through the lower surface of the fixed pressure plate 702 to the fabric rolling main shaft 802. The several fabric rolling guide shafts 804 are used for guiding the fabric rolling. The fabric rolling motor drives the fabric rolling main shaft 802 to rotate, thereby driving the fabric roll to travel on the lower surface of the fixed pressure plate 702, so as to update the used fabric above the forming mold 6 in real time and ensure that the fabric above the forming mold 6 is clean.

[0044] Furthermore, such as Figure 4 As shown, the left and right ends of the fixed pressure plate have roll strip holes 703 for the roll of cloth to pass through at their lower surface positions. The roll of cloth passes through the roll strip holes on the left and right sides from left to right to fit the lower surface of the fixed pressure plate.

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bottom vented fill system characterized by: The application relates to a cosmetic filling system, which comprises a material barrel module, a material injection module, a material storage module, a three-way valve module, a filling module and a mold fixing module; the material barrel module comprises a material barrel for containing cosmetic material and a stirring mechanism for stirring the material; the material storage module is internally provided with a material storage cavity and a plurality of material injection cavities; a material outlet of the material barrel is communicated with the material storage cavity; the material injection module comprises a plurality of piston rods corresponding to the plurality of material injection cavities, and the piston rods are driven by a piston rod power device to reciprocate in the material injection cavities to realize material injection and filling processes; the three-way valve module comprises a three-way valve and a three-way valve power device for driving the three-way valve to rotate; the filling module comprises a plurality of filling flow channels corresponding to the plurality of material injection cavities; material outlets of the filling flow channels are vertically arranged upwards and are provided with a plurality of filling needle nozzles corresponding to the filling flow channels; the three-way valve power device drives the three-way valve to rotate to switch the communication between the material storage cavity and the material injection cavities and the communication between the material injection cavities and corresponding filling flow channels; the mold fixing module comprises a mold bearing table for positioning and placing a forming mold and a fixing plate for fixing and pressing the forming mold; the filling system further comprises a cloth winding module; the cloth winding module drives cloth to rotate; the cloth is pressed downwards to adhere to an upper surface of the forming mold to discharge gas in the forming mold; the cloth winding module drives the cloth to rotate to update the cloth on the upper surface of the forming mold in the filling process.

2. A bottom vented fill system as claimed in claim 1, wherein: The material barrel is arranged above the material storage module; the material injection module is arranged behind the material storage module; the three-way valve module and the filling module are sequentially arranged in front of the material storage module; the mold bearing table is arranged above the filling module; the mold bearing table is provided with needle nozzle through holes corresponding to the filling needle nozzles and a positioning assembly for positioning the forming mold; the fixing plate is arranged directly above the forming mold and is driven by a plate power device to move up and down to press and release the forming mold.

3. A bottom vent fill system as in claim 1, wherein: The material barrel comprises an outer shell and an inner container; a heat preservation cavity is arranged between the outer shell and the inner container.

4. A bottom vent fill system as in claim 1, wherein: The three-way valve comprises a three-way valve seat; a valve cavity is formed in the three-way valve seat; a rotatable three-way valve core is arranged in the valve cavity; a plurality of T-shaped holes corresponding to the plurality of material injection cavities are formed in the three-way valve core; the three-way valve power device drives the three-way valve core to rotate to switch the guidance of the T-shaped holes.

5. A bottom vented fill system as claimed in claim 4, wherein: A plurality of first material inlets and a plurality of second material inlets are formed in the rear end of the three-way valve seat; a plurality of material outlets corresponding to the plurality of second material inlets are formed in the front end of the three-way valve seat; the plurality of first material inlets are communicated with the material storage cavity; the plurality of second material inlets are communicated with the plurality of material injection cavities one by one; the plurality of material outlets are communicated with the plurality of filling flow channels one by one; the three-way valve core is rotated to communicate the plurality of first material inlets and the plurality of second material inlets to realize the communication between the material storage cavity and the plurality of material injection cavities and to communicate the plurality of second material inlets and the plurality of material outlets to realize the communication between the plurality of material injection cavities and the plurality of filling flow channels.

6. A bottom vented fill system as claimed in claim 5, wherein: The oil seal is arranged between the adjacent first feed port, second feed port and discharge port in the valve cavity of the three-way valve, and the valve core of the three-way valve penetrates through the oil seals to realize several independent filling modules.

7. A bottom vented filling system according to any one of claims 1 to 6, wherein: The second stirring mechanism is arranged in the storage cavity and is driven by a motor to rotate in the storage cavity.

8. A bottom vented fill system as claimed in claim 7, wherein: A three-way valve seat is further arranged between the barrel and the storage module to control the flow of the cosmetic material to the storage cavity.

9. A modular bottom vented filling system characterized by: The bottom exhaust filling system comprises a three-way valve module as claimed in any one of claims 7-8, a plurality of storage cavities are regularly connected to a plurality of filling cavities through the three-way valve module to realize one-to-many connection, the filling module comprises a plurality of piston rods in the same number as the plurality of filling cavities, and one or more piston rod power devices, the plurality of piston rods are driven by the one or more piston rod power devices to reciprocate in the corresponding filling cavities to realize the material extraction and filling processes.

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