CN111088726B - Plant fiber tableware forming system and forming method - Google Patents
Plant fiber tableware forming system and forming method Download PDFInfo
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- CN111088726B CN111088726B CN201911356796.3A CN201911356796A CN111088726B CN 111088726 B CN111088726 B CN 111088726B CN 201911356796 A CN201911356796 A CN 201911356796A CN 111088726 B CN111088726 B CN 111088726B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds
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Abstract
The invention discloses a plant fiber tableware forming system and a forming method, comprising a rack, a feeding device for supplying and temporarily storing slurry, a forming tank for receiving the slurry supplied by the feeding device and a vacuum slurry draining device; a forming die is arranged in the forming pool, and a filtering structure which only allows slurry water in the slurry to pass through is arranged in the forming die; a vapor-liquid separator is arranged in the vacuum slurry draining device, the vapor-liquid separator is communicated with the forming die, and the vapor-liquid separator sucks, filters and shapes the slurry in the forming pool on a filtering structure through negative pressure; the steam-liquid separator can separate the slurry from the vacuum after the slurry passes through the forming die. The plant fiber tableware forming system realizes quick sizing by using the feeding device, thereby reducing the sizing time; the vapor-liquid separator is adopted to provide negative pressure, so that slurry is convenient to form, and simultaneously, the vapor-liquid separator realizes the separation of slurry and vacuum, and the recovery and reutilization of different raw materials are realized. The forming method has good forming quality and can effectively recycle different raw materials.
Description
Technical Field
The invention relates to the technical field of plant fiber forming, in particular to a plant fiber tableware forming system and a forming method.
Background
With the development of society and the continuous progress of technology, the utilization of plant fiber is more and more, and tableware or paper products made of the plant fiber basically realize industrialized production, so that the influence of plastic products on the environment is greatly reduced.
Some existing plant forming devices generally adopt a centrifugal dehydration mode to shape pulp on a forming die, for example, Chinese patent ZL 971162298-manufacturing technology and equipment of paper tableware, utensils and packaging products, products produced by the devices in the patent are large in limitation, and the centrifugal force is provided by rotation, so that the whole production device is large in size, inconvenient to pulp inlet, easy to splash pulp water in the centrifugal process, space occupied and large in production cost.
For this reason, some enterprises design a way of utilizing vacuum pulp absorption, for example, in the environmental-friendly production method and equipment for high-value-added utilization of waste paper in chinese patent ZL201110244527.5, the principle of vacuum pulp absorption and feeding is adopted, but the method still designs and reforms on the basis of rotary centrifugation, still does not jump out of the technical idea of centrifugal dehydration, and still has defects in structural design. In addition, in the Chinese patent ZL 201110244527.5-environment-friendly production method and equipment for high-value-added utilization of waste paper, the problem of how to recycle and treat the centrifuged pulp water is solved, so that how to design a brand-new plant fiber forming device to solve the problem is a problem which is urgently needed to be solved at present.
Disclosure of Invention
The invention aims to at least solve one of the technical problems mentioned above and provides a plant fiber tableware forming system and a forming method, wherein a vacuum pulp suction forming mode is adopted, the traditional forming mode of centrifugal forming separation is abandoned, and the forming effect is good; the forming method has the advantages of high forming efficiency and good forming quality, and different raw materials can be effectively recovered.
In order to achieve the purpose, the invention adopts the technical scheme that:
a plant fiber tableware forming system comprises
A frame;
a feeding device for supplying and temporarily storing the slurry,
the forming tank is used for receiving the slurry supplied by the feeding device, a forming die is arranged in the forming tank, and a filtering structure which only allows slurry in the slurry to pass through is arranged in the forming die; and
the vacuum slurry draining device is internally provided with a vapor-liquid separator which can have vacuum negative pressure and is communicated with the forming die, and the vapor-liquid separator sucks, filters and shapes the slurry in the forming die on a filtering structure through the negative pressure;
the steam-liquid separator can separate slurry from vacuum after penetrating through the forming die; the vapor-liquid separator comprises a first tank and a second tank, the first tank is communicated with the bottom of the forming die, and the first tank can be communicated with external negative pressure equipment; the second tank is positioned below the first tank and is communicated with the first tank; a first control valve is arranged between the second tank and the first tank, and a third control valve is arranged between the first tank and the bottom of the forming die.
As an improvement of the technical scheme, the first tank is communicated with an external negative pressure device through a fourth control valve, and the negative pressure device provides negative pressure for the vapor-liquid separator, so that slurry in the forming tank passes through the filtering structure and enters the first tank.
As an improvement of the technical scheme, the bottom of the second tank is provided with a slurry outlet which is communicated with an external recovery pipeline, and a second control valve is arranged between the slurry outlet and the external recovery pipeline.
As an improvement of the technical scheme, the feeding device is provided with an intermittent supply pipeline, a constant flow pipeline, an upper chamber and a lower chamber, the lower chamber is communicated with the forming pool, one side of the upper chamber is communicated with the forming pool in an opening and closing mode, the output end of the intermittent supply pipeline is communicated with the lower chamber through a fifth control valve, and the output end of the constant flow pipeline is communicated with the upper chamber through a sixth control valve.
As an improvement of the technical scheme, the lower chamber is arranged below the forming pool, the forming pool and the lower chamber are separated by a partition plate, and the partition plate is provided with a plurality of pulp passing holes communicating the lower chamber and the forming pool.
As an improvement of the technical scheme, a forming area is arranged in the forming pool, the forming die is installed in the forming area, a vacuum cavity is arranged in the forming area, the input end of the vacuum cavity is communicated with the bottom of the forming die, and the input end of the vapor-liquid separator is communicated with the output end of the vacuum cavity.
As an improvement of the technical scheme, the vacuum cavity is communicated with an air blowing pipeline, and the air blowing pipeline is connected with an external air inlet pipeline through a seventh control valve.
As an improvement of the above technical solution, the forming area includes a deck plate and a water collecting tray, the deck plate is buckled on the water collecting tray to form the vacuum cavity, the deck plate is provided with a plurality of adsorption holes, and the forming mold is installed on the deck plate and is communicated with the adsorption holes; the bottom of the water collecting tray is communicated with the input end of the gas-liquid separator.
The invention also provides a plant fiber tableware forming method, which comprises the following steps:
Compared with the prior art, the beneficial effects of this application are:
according to the plant fiber tableware forming system, the feeding device is used for supplying and temporarily storing the sizing agent, so that the quick sizing is realized, the sizing time is reduced, and the production efficiency is improved; designing a forming die in the forming pool, and shaping the plant fibers in the slurry by using the forming die to ensure the forming of the product; in addition, in the application, the steam-liquid separator is used for providing negative pressure, the negative pressure is used for sucking, filtering and shaping the slurry in the forming pool on the forming die, and the steam-liquid separator is used for receiving the slurry passing through the forming die and separating the slurry from vacuum, so that different raw materials are recycled. The whole forming process of this application has abandoned the tradition completely and has adopted the mode of gyration centrifugal dehydration to carry out shaping plant fiber thick liquids, has avoided splashing and the thick liquid is difficult to the problem of retrieving at the forming process thick liquids, has reduced the cost of production, and whole equipment structure is more simple, and manufacturing cost reduces. The application also provides a plant fiber tableware forming method, and the method adopts a mode that the upper chamber and the lower chamber supply pulp simultaneously, so that the sizing efficiency is improved; the forming efficiency is high by adopting suction filtration forming, the plant fiber can be effectively compacted on the forming die by utilizing negative pressure, and the forming quality is good; and different raw materials can be effectively recovered in the slurry leaching recovery.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a first schematic structural diagram of the embodiment of the present invention with the forming mold removed;
FIG. 2 is a second schematic structural view of the embodiment of the present invention with the forming mold removed;
FIG. 3 is a schematic diagram of a portion of an embodiment of the present invention;
FIG. 4 is a top view of an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along A-A of FIG. 4;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 7 is a diagram illustrating a connection structure between a molding die and a molding region according to an embodiment of the present invention;
FIG. 8 is a schematic view of a molding die according to an embodiment of the present invention;
fig. 9 is a schematic view of the overall structure of the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or there can be intervening components, and when a component is referred to as being "disposed in the middle," it is not just disposed in the middle, so long as it is not disposed at both ends, but rather is within the scope of the middle. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, 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 belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items
As shown in fig. 1 to 9, the invention provides a plant fiber tableware forming system, comprising a frame 1, a feeding device 2, a forming tank 3 and a vacuum pulp draining device, wherein the feeding device 2 is used for supplying and temporarily storing pulp; the forming tank 3 is used for receiving the slurry supplied by the feeding device 2, a forming die 31 is arranged in the forming tank 3, and a filtering structure 36 for only allowing slurry in the slurry to pass through is arranged in the forming die 31; a vapor-liquid separator 4 is arranged in the vacuum slurry draining device, the vapor-liquid separator 4 can have vacuum negative pressure, the vapor-liquid separator 4 is communicated with the forming die 31, and the vapor-liquid separator 4 sucks, filters and shapes the slurry in the forming pool 3 on the filtering structure 36 through the negative pressure; the vapor-liquid separator 4 can separate the slurry having passed through the molding die 31 from the vacuum. The plant fiber tableware forming system disclosed by the invention has the advantages that the feeding device 2 is used for supplying and temporarily storing the sizing agent, so that the rapid sizing is realized, the sizing time is reduced, and the production efficiency is improved; designing a forming die 31 in the forming pool 3, and forming the plant fibers in the slurry by using the forming die 31 to ensure the forming of the product; in addition, in the application, the vapor-liquid separator 4 is used for providing negative pressure, the slurry in the forming pool 3 is sucked, filtered and shaped on the forming die 31 by the negative pressure, and the vapor-liquid separator 4 also receives the slurry passing through the forming die 31 and separates the slurry from vacuum, so that different raw materials are recycled. The whole forming process of this application has abandoned the tradition completely and has adopted the mode of gyration centrifugal dehydration to carry out shaping plant fiber thick liquids, has avoided splashing and the thick liquid is difficult to the problem of retrieving at the forming process thick liquids, has reduced the cost of production, and whole equipment structure is more simple, and manufacturing cost reduces.
Referring to fig. 1 to fig. 3, in the present application, the feeding device 2 is connected to an external pulp supply system, and the pulp supply system is not a scope of protection of the present application, and therefore, it is not described in detail herein, and reference may be made to the structure of the pulp processing portion in the chinese patent ZL 201110244527.5-environmental production method and apparatus for high value-added utilization of waste paper, and of course, reference may also be made to another pulp supply system in the prior art. Generally, in order to improve the efficiency of the whole production, one slurry supply system is generally used to simultaneously supply a plurality of forming systems through pipelines, and the slurry supply system is also designed in the application. The feeding end of the feeding device 2 is communicated with a main feeding pipeline of an external slurry feeding system, wherein the feeding device 2 is provided with an intermediate feeding pipeline 21, a constant flow pipeline 22, an upper chamber 23 and a lower chamber 24, the lower chamber 24 is communicated with the forming pool 3, one side of the upper chamber 23 is communicated with the forming pool 3 in an opening and closing mode, the output end of the intermediate feeding pipeline 21 is communicated with the lower chamber 24 through a fifth control valve 25, and the output end of the constant flow pipeline 22 is communicated with the upper chamber 23 through a sixth control valve 26.
It should be noted that, in the present application, the upper chamber 23 and the lower chamber 24 are designed at the same time, and the main purpose is to increase the feeding rate in the pulp feeding process, shorten the time of each pulp feeding cycle, and further increase the production efficiency. For this reason, the intermediate supply line 21 and the constant flow line 22 are used in the present application to supply the slurry to the lower chamber 24 and the upper chamber 23, respectively, in different ways, and the following detailed description is made here: the upper chamber 23 serves in this application to temporarily store the slurry, while the lower chamber 24 is of conventional feed construction. The lower chamber 24 is directly communicated with the forming pool 3, so that the arrangement of the fifth control valve 25 is necessary, the forming die 31 in the forming pool 3 can cut off the intermediate supply pipeline 21 to supply slurry during forming, and the disorder of new and old slurry is avoided; in order to avoid the serious water hammer caused by closing the fifth control valve 25, the sixth control valve 26 is opened to enable the upper chamber 23 to store and feed materials, so that the feeding device 2 is always in an open state, and the water hammer is avoided. In addition, in another embodiment of the present application, one end of the anti-settling pipe 27 is connected to the feeding end of the intermediate supply pipe 21 or the constant flow pipe 22, and the other end of the anti-settling pipe 27 is connected to the bottom side wall of the upper chamber 23. The anti-settling conduit 27 always feeds the pulp into the upper chamber 23, so that the pulp in the whole upper chamber 23 can be disturbed, and plant fibers are prevented from settling.
In addition, after the forming mold 31 performs a forming operation in the forming tank 3, all the slurry in the lower chamber 24 needs to be emptied, and the fifth control valve 25 is closed. After the old slurry in the lower chamber 24 and the forming pool 3 is emptied, the fifth control valve 25 is opened, the lower chamber 24 is fed, meanwhile, the upper chamber 23 and the forming pool 3 are opened, and the slurry pre-stored in the upper chamber 23 enters the forming pool 3, so that the rapid feeding to the forming pool 3 is realized, and the feeding speed is improved. In the present application, the fifth control valve 25 and the sixth control valve 26 are each an electric butterfly valve in order to improve the convenience of the entire feed control. It should be noted that the sixth control valve 26 may be closed when the upper chamber 23 supplies the slurry to the forming tank 3, or may not be closed.
With further reference to fig. 1 to 5, a communication channel 2d is provided between the upper chamber 23 and the forming pond 3, and a second gate assembly 28 is provided on the communication channel 2 d. Because need consider in this application that the thick liquids of keeping in upper chamber 23 can flow to forming pool 3 fast, for this highly design the planar height in whole upper chamber 23 place higher than the planar height in forming pool 3 place, improved the discharge rate of the thick liquids of keeping in upper chamber 23. In addition, the design of the communication channel 2d can also avoid the splashing of the slurry and optimize the production environment. The lower chamber 24 is arranged below the forming pool 3, the forming pool 3 and the lower chamber 24 are separated by a partition plate 6, and a plurality of pulp passing holes 61 which are communicated with the lower chamber 24 and the forming pool 3 are arranged on the partition plate 6. The lower chamber 24 is annular and is arranged below the edge area of the forming pool 3, and the design enables the lower chamber 24 to uniformly gush the supplied slurry into the whole forming pool 3 from the circumferential direction when the slurry is supplied, so that the supply rate is improved, and the slurry can be uniformly mixed.
Referring to fig. 5 and 6, in the present application, since it is necessary to recover the old slurry remaining in the entire molding pool 3, one side of the lower chamber 24 is communicated with the recovery tank 7, and a first gate assembly 29 is disposed between the recovery tank 7 and the lower chamber 24. Wherein the first gate assembly 29 and the second gate assembly 28 have the same structure, in this application, the first gate assembly 29 includes a gate plate installed between the recovery tank 7 and the lower chamber 24 and a telescopic mechanism for controlling the gate plate to ascend and descend, and the telescopic mechanism may be a motor or a cylinder. In other embodiments of the present application, the communication opening between the recovery tank 7 and the lower chamber 24 is designed with limiting groove plates on both sides, and the shutter is movably inserted between the limiting groove plates on both sides. Further, the lower end of the recovery tank 7 communicates with an external recovery line through a main return pipe 2 c. In order to avoid the overflow of the upper chamber 23 from polluting the equipment due to excessive feeding amount, an overflow structure 2a is arranged in the upper chamber 23, and the overflow structure 2a is communicated with a main return pipe 2c through a recovery pipe 2 b.
With further reference to fig. 2, 4, 5, 7 and 8, a forming area 32 is provided in the forming pool 3, the forming mold 31 is installed in the forming area 32, a vacuum chamber 33 is provided in the forming area 32, an input end of the vacuum chamber 33 is communicated with a bottom of the forming mold 31, and an input end of the vapor-liquid separator 4 is communicated with an output end of the vacuum chamber 33. Wherein, lower chamber 24 is the annular setting and is in shaping district 32 periphery bottom, and such design can make lower chamber 24 when advancing thick liquid, and thick liquid gushes out from shaping pond 3 bottom week side, reaches the purpose of mixing. The forming area 32 comprises a table panel 321 and a water collecting tray 322, the table panel 321 is fastened on the water collecting tray 322 to form the vacuum cavity 33, a plurality of adsorption holes 323 are formed in the table panel 321, and the forming mold 31 is installed on the table panel 321 and communicated with the adsorption holes 323; the bottom of the water collecting tray 322 is communicated with the input end of the gas-liquid separator 4. The water collecting tray 322 is similar to a funnel-shaped structure, and in actual use, a plurality of water collecting trays 322 can be arranged, and then the output ends of all the water collecting trays 322 are connected to the gas-liquid separator 4 in parallel. In addition, in order to improve the installation convenience of the forming mold 31, a plurality of installation positions for installing the forming mold 31 are provided on the table panel 321, and the forming mold can be installed on the installation positions through bolts.
Referring also to fig. 1, 3 and 9, in another embodiment of the present application, the vacuum chamber 33 communicates with a blow line 34, the blow line 34 being connected to an external air intake line via a seventh control valve 35. The air blowing pipeline 34 is mainly arranged to blow slurry in an air blowing mode, so that the slurry can be effectively mixed before being sucked by the vapor-liquid separator 4, and the later slurry sucking and precipitation are facilitated. Referring to fig. 7 and 8, in the present application, the forming mold 31 is provided with a forming cavity 311, and the filter structure 36 is installed in the forming cavity 311, wherein it should be noted that the forming cavity 311 and the filter structure 36 are both the copying structure of the product, and different products have forming cavities 311 and filter structures 36 with different shapes. In the present application, the filtering structure 36 may be a filtering net or a structure similar to the filtering net, and the filtering structure 36 only allows the slurry water in the slurry to pass through, but may also allow a trace amount of plant fibers to pass through. The molding cavity 311 is communicated with the vacuum cavity 33, wherein the molding cavity 311 is provided with a plurality of communication holes communicated with the vacuum cavity 33. In actual use, the molding cavities 311 are provided with several groups, which are designed according to actual requirements. The vacuum cavity 33 is designed to provide an equal negative pressure to the forming cavities 311 at the same time, so that each forming cavity 311 can suck the slurry uniformly.
With further reference to fig. 1, 3 and 9, the vacuum slurry draining device of the present application may actually further include a negative pressure device 5, wherein the negative pressure device 5 serves as a vacuum power source in the whole vacuum slurry draining device, and actually in another embodiment of the present application, the negative pressure device 5 may be integrated with the vapor-liquid separator 4, so that the vapor-liquid separator 4 has a vacuum generating capability, and of course, the vacuum is needed for the whole forming system not only for the vapor-liquid separator 4, but also for the present application, the negative pressure device 5 is provided separately and serves as a vacuum source for the vapor-liquid separator 4. The negative pressure device 5 can be a conventional vacuum pump station system, and consists of a vacuum pump, a vacuum pipeline, a vacuum storage tank and a plurality of corresponding valve bodies, and the details are not described in the application due to the conventional technology.
For this purpose, the vapor-liquid separator 4 in the present application includes a first tank 41 and a second tank 42, the first tank 41 communicates with the bottom of the forming die 31, and the first tank 41 may communicate with the external negative pressure device 5; the second tank 42 is located below the first tank 41 and is in communication with the first tank 41; a first control valve 43 is arranged between the second tank 42 and the first tank 41, and a third control valve 44 is arranged between the first tank 41 and the bottom of the forming die 31. In order to further increase the ease of control and to enable the vacuum to be broken in time, the first tank 41 is in communication with an external negative pressure device 5 via a fourth control valve 45, the negative pressure device 5 providing a negative pressure to the vapour-liquid separator 4 such that the slurry in the forming pond 3 passes through the filter structure 36 into the first tank 41. The purpose is mainly to maintain the vacuum in the first tank 41 during later inspection of the negative pressure equipment 5. In addition vacuum waterlogging caused by excessive rainfall device in this application, can also be provided with other structures, for example wash the structure, let in a washing water pipe in first jar 41 or second jar 42, utilize various valve bodies on first jar 41 or the second jar 42 to mutually support, adopt above-mentioned thick liquid water exhaust mode to carry out the abluent waste water of discharging, can realize the cleaning work of first jar 41, second jar 42 isotructure like this, guarantee subsequent work normal clear.
Referring to fig. 9, it should be noted that in the present application, the first tank 41 is adopted to receive the slurry and vacuum in advance and then transfer the slurry to the second tank 42, or the second tank 42 directly receives the slurry and vacuum, then the first control valve 43 is used to cut off the vacuum between the second tank 42 and the first tank 41, and then the slurry and partial vacuum in the second tank 42 are discharged, so that the vacuum waste in the whole vacuum slurry draining device is reduced, and the production cost is reduced. Wherein after the suction filtration of the first tank 41 is completed, the third control valve 44 closes the connection between the first tank 41 and the bottom of the forming die 31 to prevent outside air from entering the vapor-liquid separator 4 through the forming die 31, so that vacuum is not wasted. After the third control valve 44 is closed, since the first tank 41 is higher than the second tank 42, if the first control valve 43 is in an open state for this reason, the slurry water enters into the second tank 42; after the slurry completely enters the second tank 42, the first control valve 43 is closed, so that the first tank 41 and the external negative pressure device 5 are still in a vacuum state, and at this time, the second tank 42 is in a closed structure by default, and no vacuum leakage exists, and at this time, the first control valve 43 is closed, so that the second tank 42 can be taken out to discharge the slurry in the second tank 42. Therefore, the gas-liquid separator 4 can realize the transfer of slurry between the first tank 41 and the second tank 42 through the control of different valve bodies, and only wastes the vacuum in the second tank 42 when the slurry is discharged, thereby greatly reducing the waste of the whole vacuum and reducing the energy consumption of production.
Referring to fig. 9, in another embodiment of the present application, in order to reduce labor intensity and the trouble of frequently disassembling and assembling the second tank 42 by a human to drain the slurry, a slurry outlet 46 is provided at the bottom of the second tank 42, the slurry outlet 46 communicates with an external recycling pipeline, and a second control valve 47 is provided between the slurry outlet 46 and the external recycling pipeline. A second control valve 47 is arranged between the slurry outlet 46 and the external recovery pipeline. Thus, when slurry enters the second tank 42 from the first tank 41, the second control valve 47 is closed, thus reducing the loss of vacuum of the whole system through the slurry outlet 46; after the slurry completely enters the second tank 42, the first control valve 43 is closed, at this time, two independent spaces are formed between the second tank 42 and the first tank 41, at this time, the second control valve 47 is opened, the slurry in the second tank 42 is naturally discharged, meanwhile, the vacuum in the first tank 41 is not influenced, the utilization rate of the vacuum is improved, and the energy consumption is reduced. Wherein the external recycling pipeline can be communicated with the whole production system of the plant fiber pulp to realize the recycling of the pulp. Of course, the external recycling pipes may be recycling tanks, which are configured with a structure such as a feeding pump and corresponding pipes, and the old pulp in the recycling tanks is supplied to the whole plant fiber pulp production system by the feeding pump, and then the pulp is reconfigured and supplied to the feeding device 2.
Referring to fig. 9, the present invention also provides a method for forming plant fiber tableware, comprising the following steps:
and 6, taking down the molded product on the forming die 31, and emptying the residual slurry in the lower chamber 24 to finish slurry molding.
Wherein the set of gates in step 2 above is the second gate assembly 28 and emptying of the remaining slurry in the lower chamber 24 in step 6, is actually activating the first gate assembly 29 so that the remaining slurry in the lower chamber 24 can pass into the recovery tank 7 and thus into the external recovery conduit. A level sensor is provided in the forming tank 3, which is capable of controlling the action of the sixth control valve 26 and the second shutter assembly 28, the level sensor controlling the movement of the valve body being conventional technical means and not described in detail here.
It should be noted that, when step 3 is performed, the third control valve 44 between the forming mold 31 and the first tank 41 must be closed, otherwise the vacuum in the first tank 41 is wasted, which increases the production cost.
According to the plant fiber tableware forming method, the mode that the upper chamber 23 and the lower chamber 24 are simultaneously supplied with the pulp is adopted, so that the sizing efficiency is improved; the forming efficiency is high by adopting suction filtration forming, the plant fiber can be effectively compacted on the forming die 31 by utilizing negative pressure, and the forming quality is good; and different raw materials can be effectively recovered in the slurry leaching recovery.
The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (9)
1. A plant fiber tableware forming system is characterized by comprising
A frame;
a feeding device for supplying and temporarily storing the slurry,
the forming tank is used for receiving the slurry supplied by the feeding device, a forming die is arranged in the forming tank, and a filtering structure which only allows slurry in the slurry to pass through is arranged in the forming die; and
the vacuum slurry draining device is internally provided with a vapor-liquid separator which can have vacuum negative pressure and is communicated with the forming die, and the vapor-liquid separator sucks, filters and shapes the slurry in the forming die on a filtering structure through the negative pressure;
the steam-liquid separator can separate slurry from vacuum after penetrating through the forming die; the vapor-liquid separator comprises a first tank and a second tank, the first tank is communicated with the bottom of the forming die, and the first tank can be communicated with external negative pressure equipment; the second tank is positioned below the first tank and is communicated with the first tank; a first control valve is arranged between the second tank and the first tank, and a third control valve is arranged between the first tank and the bottom of the forming die.
2. A plant fiber tableware moulding system according to claim 1 wherein said first tank is connected to an external negative pressure device through a fourth control valve, said negative pressure device providing negative pressure to the vapour-liquid separator to cause the pulp water in the moulding tank to pass through the filtering structure into the first tank.
3. The vegetable fiber tableware molding system according to claim 1, wherein said second tank is provided with a pulp outlet at the bottom, said pulp outlet is communicated with an external recycling pipeline, and a second control valve is arranged between said pulp outlet and said external recycling pipeline.
4. The vegetable fiber tableware forming system according to claim 1, wherein the feeding device is provided with an intermediate supply pipeline, a constant flow pipeline, an upper chamber and a lower chamber, the lower chamber is communicated with the forming pool, one side of the upper chamber is communicated with the forming pool in an opening and closing manner, an output end of the intermediate supply pipeline is communicated with the lower chamber through a fifth control valve, and an output end of the constant flow pipeline is communicated with the upper chamber through a sixth control valve.
5. A plant fiber tableware forming system according to claim 4, wherein said lower chamber is disposed below the forming tank, said forming tank and said lower chamber are separated by a partition plate, said partition plate is provided with a plurality of pulp holes communicating said lower chamber and said forming tank.
6. The plant fiber tableware forming system according to claim 1 or 4, wherein a forming area is arranged in the forming pool, the forming mold is installed in the forming area, a vacuum chamber is arranged in the forming area, an input end of the vacuum chamber is communicated with the bottom of the forming mold, and an input end of the vapor-liquid separator is communicated with an output end of the vacuum chamber.
7. The vegetable fiber tableware forming system according to claim 6, wherein said vacuum chamber is connected to an air blowing pipeline, and said air blowing pipeline is connected to an external air inlet pipeline through a seventh control valve.
8. The vegetable fiber tableware forming system according to claim 6, wherein said forming area comprises a table board and a water collecting tray, said table board is fastened on said water collecting tray to form said vacuum chamber, said table board is provided with a plurality of suction holes, said forming mold is mounted on said table board and is communicated with said suction holes; the bottom of the water collecting tray is communicated with the input end of the gas-liquid separator.
9. A method for forming plant fiber tableware is characterized by comprising the following steps:
step 1, preparing slurry supply, namely opening a fifth control valve, supplying slurry to an upper chamber by a constant-flow pipeline, and closing the fifth control valve until the slurry reaches an overflow capacity in the upper chamber;
step 2, feeding slurry, opening a sixth control valve, and supplying slurry to a lower chamber through an intermediate supply pipeline; opening a gate group between the upper chamber and the forming pool, enabling the slurry in the upper chamber to flow to the forming pool, and closing the sixth control valve and the gate group when the slurry in the forming pool reaches a preset capacity;
step 3, mixing materials, namely opening a seventh control valve, and blowing air to the forming die through an air blowing pipeline so as to enable slurry in the forming pool to flow uniformly;
step 4, suction filtration forming, namely closing the seventh control valve, then opening a third control valve between a forming die and the first tank and a fourth control valve between the first tank and a negative pressure device, suction filtering plant fibers in the slurry in the forming pool and forming the plant fibers on a filtering structure by negative pressure in the first tank, allowing the slurry in the slurry to enter the first tank through the forming die until the liquid level of the slurry in the forming tank is lower than the feeding plane of the forming die, and closing the third control valve and the fourth control valve;
step 5, draining and recovering, namely opening a first control valve between the first tank and the second tank, enabling the slurry water in the first tank to flow into the second tank, and closing the first control valve after the slurry water completely enters the second tank; opening a second control valve, and discharging the slurry in the second tank together with the vacuum in the second tank; after the slurry is discharged, closing the second control valve;
and 6, taking down the molded product on the molding die, and emptying the residual slurry in the lower chamber to finish slurry molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911356796.3A CN111088726B (en) | 2019-12-25 | 2019-12-25 | Plant fiber tableware forming system and forming method |
Applications Claiming Priority (1)
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| CN112160190B (en) * | 2020-07-31 | 2022-07-29 | 广西福斯派环保科技有限公司 | Hot-pressing demoulding mould |
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