CN105350402A - Paper molding multi-vacuum-degree blank forming method and apparatus for implementing same - Google Patents
Paper molding multi-vacuum-degree blank forming method and apparatus for implementing same Download PDFInfo
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- CN105350402A CN105350402A CN201510654118.0A CN201510654118A CN105350402A CN 105350402 A CN105350402 A CN 105350402A CN 201510654118 A CN201510654118 A CN 201510654118A CN 105350402 A CN105350402 A CN 105350402A
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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
- D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
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Abstract
The invention discloses a paper molding multi-vacuum-degree blank forming method. The method comprises a blank forming step which is carried out after pulping liquid is added into a pulping barrel of a blank forming die. The method is characterized by comprising following steps: (1) a first stage of vacuum-pumping; (2) a second stage of vacuum-pumping; (3) a third stage of vacuum-pumping; (4) the separation of a formed wet blank from the blank forming die, and the transfer of the wet blank. The invention also discloses an apparatus implementing the method mentioned above. The apparatus comprises a vacuum negative-pressure suck-filtration system and a vacuum negative-pressure die-suction die. The vacuum negative-pressure die-suction die comprises a blank forming die body at the upper part and a blank forming die base board at the lower part. The blank forming die base board is provided with a vacuum blank forming main channel communicating with the vacuum negative-pressure suck-filtration system. A vacuum negative-pressure sensor and an adjustable feedback type ball valve are arranged between the vacuum blank forming main channel and the vacuum negative-pressure suck-filtration system. According to the invention, the formed wet blank is uniform in thickness, the rate of finished products is high, the molding time is short, and requirements of products with various shapes and sizes can be met.
Description
Technical field
The present invention relates to the method that the many vacuum of a kind of Paper moulded copies base, and the many vacuum of the Paper moulded realizing said method copies base equipment.
Background technology
With the Paper moulded goods that annual herb string is made for main raw material, the health of modern society, convenient, fast, healthy life requirement are adapted to, can the feature of degradable, back to nature after practical, nontoxic with it, discarded, there is vast potential for future development, thus paper mould industry is an environmental protection industry being conducive to Sustainable Socioeconomic Development, has huge consumption demand and wide growth space at home, in the world.
The Paper moulded industry of China is started in the eighties in last century, or the industry that is emerging, a lot of very large growing space is also had in technique, structure, mould, material etc., particularly along with society is to the continuous expansion of the in-depth of the awareness of Paper moulded goods and the raising of acceptance level, new goods demand and new Application Areas, new requirement is proposed, the challenge that Paper moulded industry faces is new to the moulding process of Paper moulded goods and process technology.
At present in the industry general dark to processing cavity, skew back degree is less and article shape is complicated, require higher goods all also feel comparatively difficulty, even if done some to attempt, also can find in exploration that yield rate is lower, process conditions are unstable and more difficult normal production.Tracing it to its cause, is that copying in base equipment used, the vacuum that its midge copies base adopts single vacuum because current Paper moulded midge copies base process conditions comparatively simply.Adopt single vacuum midge to copy base and have that molding time is long, efficiency is low, the goods that also more difficult shaping moldeed depth is deeper.
Comparatively speaking, when lower vacuum copies base, the uniformity of goods is quite a lot of, but becomes base time longer base efficiency of copying low; Although and become base time more fugitive rate higher when higher vacuum copies base, the uniformity of goods obviously can be poor, and particularly in slurries, the retention of fiber fines tissue is low, and raw-material utilization rate also can be lower.
Its reason be pulping slurries that under condition of high vacuum degree, suction strainer drives by vacuum mould-suction body applies the woven wire that covers and by vacuum the pore copied on mold body enter inhale model cavity after and flow fast to negative pressure of vacuum source copy in base process, the lower high velocity liquid stream formed of condition of high vacuum degree suction can form liquid stream orientation when being copied the pore on mold body by vacuum, General Proper reciprocal of duty cycle is larger, and its orientation effect is larger; Fiber in orientation liquid stream, in slurries also can be substantially identical with liquid flow path direction flow to arranged evenly, its fibr tissue of wet base of manufacturing paper with pulp in this state also can be formed distribution of orientations arrangement and the tearing strength in some direction of goods is obviously reduced; Liquid stream orientation simultaneously, vacuum also can be made to copy the fiber accumulations meeting at position near pore on mold body soon, and thickness can be large, and obviously can be much smaller at the thickness of other region parisons, reduces product quality because of the in uneven thickness of goods.
Summary of the invention
The object of the invention is to solve problem existing in prior art, provide a kind of become base good evenness, become the base time short, copy the many vacuum of the high Paper moulded of base efficiency and copy blank technology.
Corresponding therewith, another technical problem that will solve of the present invention be to provide a kind of can realize above-mentioned one-tenth base good evenness, become the base time short, copy the high equipment of base efficiency.
Copy blank technology with regard to the many vacuum of Paper moulded, what the present invention solved the problems of the technologies described above copies blank technology, comprises the steps: the step first adding into slurries in the slurry barrel copying mold tool; Then according to following four steps operation:
(1) first stage vacuum suction;
Start negative pressure of vacuum suction strainer system, carrying out negative pressure of vacuum suction to destroying chamber at the bottom of mold, after suction, making the vacuum of copying in chamber at the bottom of mold remain on-400 ~-2000Pa;
(2) second stage vacuum suction;
The progressively negative pressure of Raise vacuum negative pressure suction strainer system, on the basis in above-mentioned steps (1), makes to copy vacuum up in chamber at the bottom of mold to 40000Pa;
(3) phase III vacuum suction;
On basis in above-mentioned steps (2), again the negative pressure of negative pressure of vacuum suction strainer system is raised, make the vacuum of copying in chamber at the bottom of mold remain on 40000 ~ 70000Pa;
(4) shaping wet base of oneself being manufactured paper with pulp departs from copies mold, carries out parison transfer.
Preferably, in described step (1), the time of negative pressure of vacuum suction is 0.5 ~ 1.5 second.
Preferably, in described step (2), the time of negative pressure of vacuum suction is 0.5 ~ 2 second.
Preferably, in described step (3), the time of negative pressure of vacuum suction is 0.5 ~ 5 second.
Just realize with regard to said method, the present invention is that the many vacuum of Paper moulded solved the problems of the technologies described above copies base equipment, comprises negative pressure of vacuum suction strainer system and negative pressure of vacuum inhales mould mould; Described negative pressure of vacuum inhale mould mould comprise superposed copy mold body and be positioned at its underpart copy mold seat board, formed in the middle of combining between the higher and lower levels and destroy chamber at the bottom of mold; Copy in chamber at the bottom of mold the die body supporting construction having and copy mold body one, copy mold pore copying mold body offers; Copy mold body applies and be covered with silk screen, be provided with slurry barrel copying above mold body; Copy mold seat board to offer the vacuum be connected with negative pressure of vacuum suction strainer system and copy base overall channel; Copy between base overall channel and negative pressure of vacuum suction strainer system in vacuum and be provided with negative pressure of vacuum force snesor and adjustable band reaction type ball valve.
Preferably, described negative pressure of vacuum suction strainer system is copied base overall channel by vacuum air-channel and described vacuum and is connected.
Preferably, described vacuum air-channel is provided with described negative pressure of vacuum force snesor, and described adjustable band reaction type ball valve communicates with the bypass of vacuum air-channel.
Preferably, described vacuum is copied base overall channel and is opened in the centre position of copying mold seat board.
Preferably, described silk screen is that metal copies base silk screen.
Preferably, described adjustable band reaction type ball valve is middle envelope formula pneumatic control valve.
Copy blank technology by the many vacuum of Paper moulded of the present invention and realize the equipment of the method, can make that the wet base thickness of formation is even, yield rate is high, molding time is short, meet the goods requirement of various shape and size, also can improve the retention of fiber fines tissue in slurry, improve raw-material utilization rate.
Accompanying drawing explanation
Fig. 1 is the equipment copying blank technology realizing the many vacuum of Paper moulded of the present invention
Detailed description of the invention
The technological means realized to make the present invention, technical characteristic, goal of the invention and technique effect are easy to understand, and below in conjunction with concrete diagram, set forth the present invention further.
The many vacuum of Paper moulded of the present invention copy blank technology, comprise the steps: the step first adding into slurries in the slurry barrel copying mold tool; Then according to following four steps operation:
(1) first stage vacuum suction;
Start negative pressure of vacuum suction strainer system, carrying out negative pressure of vacuum suction to destroying chamber at the bottom of mold, after suction, making the vacuum of copying in chamber at the bottom of mold remain on-400 ~-2000Pa;
Because stage vacuum degree is lower, the one-tenth slurries 4 that under rough vacuum, negative pressure suction strainer drives mold body are applied the metal that covers are copied base silk screen 3 (being transverse shifting in silk screen layer) being copied by vacuum mould-suction, and enter copy behind chamber 6 at the bottom of mold to negative pressure of vacuum source flow by the mold pore 2 of copying that vacuum is copied on mold body 1, the lower low speed liquid stream formed of rough vacuum suction copied by vacuum on mold body 1 copy mold pore 2 time to form liquid stream orientation lower, become the fiber in slurries 4 to be copied base silk screen 3 to twine and stay, and can copy around mold pore 2 in a big way in form the accumulation horizon that arranges alternately of a fiber aspect, As time goes on, the scope of this accumulation horizon progressively expands, until form the slightly discrepant very thin one deck accumulation horizon of a layer thickness.
Now vacuum is lower, and the model of accumulation horizon is larger, and difference in thickness is less; Otherwise vacuum is higher, just comparatively piling up in zonule copying around mold pore of accumulation horizon, and difference in thickness is larger; Because now under condition of high vacuum degree to copy the orientation effect around mold pore strong, distance copies that the larger region of mold is more difficult to be had fiber to be driven down by air-flow to stay accumulation through Bing Chan, and the fiber accumulations of the parison that particularly condition of high vacuum degree suction, high orientation liquid stream are formed is difficult to the kilter accomplishing mutual arrangement in length and breadth.It very greatly, is also most crucial that this stage rough vacuum copies the quality influence of base to the uniformity of end article and goods.
(2) second stage vacuum suction;
The progressively negative pressure of Raise vacuum negative pressure suction strainer system, on the basis in above-mentioned steps (1), makes to copy vacuum up in chamber at the bottom of mold to 40000Pa;
This stage controls according to copying base process, the suction stage of the vacuum progressively raised after starting to copy base, the negative pressure of the negative pressure of vacuum suction strainer system oneself so activated to open progressively raises, progressively reduce by adjustable band reaction type ball valve 11 flow area, make it progressively to be raised by original comparatively rough vacuum to arrive 40000Pa, this time span progressively raised is 0.5 ~ 2 second.
Copy on mold body 1 in this stage and copy near base pore 2 at the thicker deposit of formation previous stage, compare the air-flow in other regions by comparatively slow, but the gas-liquid flow in other regions can through accumulation horizon before this with copy base silk screen after still can enter at the lower floor of copying base silk screen 3, surface transverse shifting in silk screen layer of copying mold body 1 easily and copy mold pore 2 and through destroying chamber 6 at the bottom of mold to negative pressure of vacuum source flow.
The thickness of this stage parison can progressively be tending towards even while progressively increasing, also.According to the difference of goods and the different of technological requirement, this stage can arrange several or multiple vacuum and associated time span, and PLC equal time control method can reach this technological requirement relatively easily.
(3) phase III vacuum suction;
On basis in above-mentioned steps (2), again the negative pressure of negative pressure of vacuum suction strainer system is raised, make the vacuum of copying in chamber at the bottom of mold remain on 40000 ~ 70000Pa;
This stage is the final stage that vacuum is aspirated, and this stage is the suction of condition of high vacuum degree, and control vacuum is 40000 ~ 70000Pa, and negative-pressure ward 0.5 ~ 5 second, completes wet base shaping.The main purpose of originally copying the base stage reaches thickness and the weight of parison or goods, makes it to meet the requirements.
This stage is as the parison of needs or the thickness of goods is larger, weight is heavier, then the vacuum set can be higher, also can copy the increase of base time.
(4) shaping wet base of oneself being manufactured paper with pulp departs from copies mold, carries out parison transfer.
The many vacuum of this Paper moulded copies the final stage of base technique yes parison transfer, and shaping wet base of oneself being manufactured paper with pulp departs to be copied mold and proceed to next process.
If Fig. 1 is the equipment realizing said method in the present invention, comprise negative pressure of vacuum suction strainer system and negative pressure of vacuum suction mould mould; Negative pressure of vacuum suction strainer system mainly provides negative pressure of vacuum source 20.
Negative pressure of vacuum in the present invention inhales mould mould, comprise superposed copy mold body 1 and be positioned at its underpart copy mold seat board 8, formed in the middle of combining between the higher and lower levels and destroy chamber 6 at the bottom of mold; Copy in chamber 6 at the bottom of mold the die body supporting construction having and copy mold body 1 one, copy mold pore 2 copying mold body 1 offers; Copy mold body 1 applies and be covered with and copy base silk screen 3, be provided with slurry barrel 5 copying above mold body 1; Copy mold seat board 8 to offer the vacuum be connected with negative pressure of vacuum source 20 and copy base overall channel 7.
Copy between base overall channel 7 and negative pressure of vacuum source 10 in vacuum and be provided with negative pressure of vacuum force snesor 10 and adjustable band reaction type ball valve 11.Vacuum copies the vacuum air-channel 9 that base overall channel 7 is connected with negative pressure of vacuum source 20, and vacuum air-channel 9 is provided with negative pressure of vacuum force snesor 10, and adjustable band reaction type ball valve 11 and vacuum air-channel 9 bypass interlink.
Close completely adjustable band reaction type ball valve 11 vacuum air-channel 9 and copy negative pressure of vacuum in chamber 6 at the bottom of mold identical with negative pressure of vacuum source 20, be also the highest; Along with the difference of adjustable band reaction type ball valve 11 opening degree, vacuum air-channel 9 and the negative pressure of vacuum value of copying in chamber 6 at the bottom of mold are changes, and indicate real vacuum pressure value by negative pressure of vacuum force snesor 10.
Because adjustable band reaction type ball valve 11 is pneumatic, and need be by negative pressure of vacuum force snesor 10 FEEDBACK CONTROL, so the pneumatic control valve controlling adjustable band reaction type ball valve 11 should be middle envelope formula.If when actual suction pressure does not meet the setting value of former technological requirement, the pneumatic control valve that two-way keying controls the middle envelope formula of adjustable band reaction type ball valve 11 also can be continued.
Copy in the process of base at Paper moulded negative pressure of vacuum suction strainer, the liquid water in slurries 4 is become to leave destroy chamber 6 at the bottom of mold by the mold pore 2 of copying copied on mold body 1 under negative pressure of vacuum effect, form fiber in slurries 4 then can be copied the base silk screen 3 of copying that mold body 1 upper cover covers and intercept, and progressively entwine copying base silk screen wire side piles up, form wet base.
If the vacuum adopted is large, then the wet base greatly and finally formed because of suction force is thicker, but the wet base evenness of manufacturing paper with pulp under single condition of high vacuum degree can be poor, and the retention of fiber fines tissue can be low, and affect raw-material utilization rate; If the vacuum adopted is little, then can molding time extend, the thickness of the goods obtained is also less.
Method and apparatus of the present invention, is broadly divided into three phases by one-tenth base process, then illustrate by this and analyze:
First stage, owing to just starting suction, without fiber accumulations on wire side, it is unobstructed to destroy mold pore front, now under negative pressure of vacuum effect, has an aperture effect scope and effect distance in front, aperture; Vacuum is larger, aperture effect scope is less, and effect distance in aperture is far away, the effect that slurries flow direction within the scope of this effect of holes produces orientation is larger, the fiber piled up because be mostly in the same way, difficulty of laterally entwining and make finally to become the second-rate of base, so time low vacuum a little as well, a little large with the aperture effect scope making to copy mold pore, fiber-wall-element model is more weak.
As time goes on, after copying the increase of the fiber accumulations near mold pore, deposit can affect the original effect scope of air-flow and effect distance, the accumulation of fiber now can be made progressively away from gas opening, the fiber piled up is by a switch block shape, be transformed into planar afterwards, this one-phase is into the second stage of base.
Enter into the phase III of base subsequently, copy after mold silk screen 3 surface coverage piled up certain thickness fibrage what copy mold cavity surface, this fibrage itself also form drainage layer, now oneself is very faint for the aperture effect that produces of negative pressure of vacuum, but generation effect within the scope of whole cavity surface, now negative pressure of vacuum active force is the geometric jacquard patterning unit surface being basically perpendicular to cavity surface, so time one-tenth slurries 4 in liquid water through accumulation horizon, through copying base silk screen 3 mesh, and the transverse shifting flow direction copies mold pore 2 in silk screen layer, form fiber in slurries 4 at accumulation horizon uniformly, sedimentation at leisure, pile up Jiao Chan, accumulation horizon quality is now best.
It is by taking copying in base process that the many vacuum of Paper moulded of the present invention copies blank technology: use lower vacuum when the negative pressure of vacuum suction strainer started copies base and maintain one and be of convenient length the adjustable time, make paper fiber die body mold cavity surface shape one deck by local to entirety, progressively formed the accumulation horizon of planar by point-like; Then in several time point, vacuum is progressively improved at this after-stage, make that paper fiber is tending towards evenly at the stacking lamination thickness of the mold cavity surface shape of die body, the arranged evenly of fiber is tending towards rational accumulation horizon; In the end the stage re-uses higher vacuum, thickens, thus obtain excellent wet base under the rational prerequisite that accumulation horizon is arranged well, in length and breadth alternately at fiber mutual Qian Chan; The fiber fines that it also avoid thus when base is copied in the suction of single condition of high vacuum degree is organized retention low and have impact on the utilization rate that former material is.
On the mould of Paper moulded production of articles, apply the basic reason covering layer of metal silk screen in the present invention is: after having had this one deck silk screen, still can apply transverse shifting gas-liquid flow in the woven wire that covers under wet base, copying above mold body destroying the region of mold body not being copied mold pore, make to copy base process and can proceed and complete.Because so, Paper moulded general mould all will apply cover one deck silk screen in the industry, can move laterally can make air water in this silk screen layer.
Paper matrix of the present invention is moulded multiple vacuum height and the length of time of blank technology, all can be different according to the specific requirement difference of goods, and can set arbitrarily.The present invention is applicable to the mode of production of unit, semi-automatic, Full-automatic machine.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Namely all equivalences done according to the content of the present patent application the scope of the claims change and modify, and all should belong to technology category of the present invention.
Claims (10)
1. the many vacuum of Paper moulded copy blank technology, the method comprise in the slurry barrel copying mold tool, add into slurries after to manufacture paper with pulp the processing step of parison; It is characterized in that: the method comprises the steps:
(1) first stage vacuum suction;
Start negative pressure of vacuum suction strainer system, carrying out negative pressure of vacuum suction to destroying chamber at the bottom of mold, after suction, making the vacuum of copying in chamber at the bottom of mold remain on-400 ~-2000Pa;
(2) second stage vacuum suction;
The progressively negative pressure of Raise vacuum negative pressure suction strainer system, on the basis in above-mentioned steps (1), makes the vacuum (progressively) of copying in chamber at the bottom of mold be elevated to 40000Pa;
(3) phase III vacuum suction;
On basis in above-mentioned steps (2), again the negative pressure of negative pressure of vacuum suction strainer system is raised, make the vacuum of copying in chamber at the bottom of mold remain on 40000 ~ 70000Pa;
(4) shaping wet base of oneself being manufactured paper with pulp departs from copies mold, carries out parison transfer.
2. the many vacuum of Paper moulded according to claim 1 copy blank technology, it is characterized in that: the time of negative pressure of vacuum suction is 0.5 ~ 1.5 second in described step (1).
3. the many vacuum of Paper moulded according to claim 1 copy blank technology, it is characterized in that: the time of negative pressure of vacuum suction is 0.5 ~ 2 second in described step (2).
4. the many vacuum of Paper moulded according to claim 1 copy blank technology, it is characterized in that: the time of negative pressure of vacuum suction is 0.5 ~ 5 second in described step (3).
5. copying a base equipment for realizing the many vacuum of Paper moulded according to claim 1, comprising negative pressure of vacuum suction strainer system and negative pressure of vacuum suction mould mould; Described negative pressure of vacuum inhale mould mould comprise superposed copy mold body and be positioned at its underpart copy mold seat board, formed in the middle of combining between the higher and lower levels and destroy chamber at the bottom of mold; Copy in chamber at the bottom of mold the die body supporting construction having and copy mold body one, copy mold pore copying mold body offers; Copy mold body applies and be covered with silk screen, be provided with slurry barrel copying above mold body; Copy mold seat board to offer the vacuum be connected with negative pressure of vacuum suction strainer system and copy base overall channel; It is characterized in that: copy between base overall channel and negative pressure of vacuum suction strainer system in vacuum and be provided with negative pressure of vacuum force snesor and adjustable band reaction type ball valve.
6. the many vacuum of Paper moulded according to claim 5 copies base equipment, it is characterized in that: described negative pressure of vacuum suction strainer system is copied base overall channel by vacuum air-channel and described vacuum and is connected.
7. the many vacuum of Paper moulded according to claim 6 copies base equipment, it is characterized in that: described vacuum air-channel is provided with described negative pressure of vacuum force snesor, and described adjustable band reaction type ball valve communicates with the bypass of vacuum air-channel.
8. the many vacuum of Paper moulded according to claim 5 copies base equipment, it is characterized in that: described vacuum is copied base overall channel and is opened in the centre position of copying mold seat board.
9. the many vacuum of Paper moulded according to claim 5 copies base equipment, it is characterized in that: described silk screen is that metal copies base silk screen.
10. the many vacuum of Paper moulded according to claim 5 copies base equipment, it is characterized in that: described adjustable band reaction type ball valve is middle envelope formula pneumatic control valve.
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| CN201510654118.0A CN105350402A (en) | 2015-10-10 | 2015-10-10 | Paper molding multi-vacuum-degree blank forming method and apparatus for implementing same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510654118.0A CN105350402A (en) | 2015-10-10 | 2015-10-10 | Paper molding multi-vacuum-degree blank forming method and apparatus for implementing same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106436491A (en) * | 2016-11-18 | 2017-02-22 | 上海英正辉环保设备有限公司 | Paper molding post-forming process and die |
| CN112982034A (en) * | 2021-02-05 | 2021-06-18 | 永发（河南）模塑科技发展有限公司 | Pipeline system capable of achieving color fast switching |
| CN117536011A (en) * | 2023-11-13 | 2024-02-09 | 浙江星辉新材料科技有限公司 | Control method for directional arrangement of carbon filaments of wet-process felt |
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| US3971689A (en) * | 1972-06-29 | 1976-07-27 | Diamond International Corporation | Method for producing deckle-free edges and windows in molded fiber products |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117536011A (en) * | 2023-11-13 | 2024-02-09 | 浙江星辉新材料科技有限公司 | Control method for directional arrangement of carbon filaments of wet-process felt |
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Application publication date: 20160224 |