CN1623022A - Improved molded fiber manufacturing - Google Patents
Improved molded fiber manufacturing Download PDFInfo
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- CN1623022A CN1623022A CNA028286812A CN02828681A CN1623022A CN 1623022 A CN1623022 A CN 1623022A CN A028286812 A CNA028286812 A CN A028286812A CN 02828681 A CN02828681 A CN 02828681A CN 1623022 A CN1623022 A CN 1623022A
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- formed body
- fiber formed
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- molded fiber
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/14—Carboxylic acids; Derivatives thereof
- D21H17/15—Polycarboxylic acids, e.g. maleic acid
- D21H17/16—Addition products thereof with hydrocarbons
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/17—Ketenes, e.g. ketene dimers
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
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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
- D21J7/00—Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of fibres in or on a wire-net mould
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Artificial Filaments (AREA)
Abstract
Molded fiber products using agriculture residues are economical and environmentally beneficial. Molded fiber manufacturing is different from molded pulp. The present invention discloses a method of and an apparatus for the manufacturing of molded fiber shaped body (10) using low consistency fiber slurry (12) subject to vacuum-forming and thermo-curing. The use of porous material as mold inserts for both vacuum-forming (101) and thermo-curing (102) stations provides improved productivity and enables ease of mold release. The incorporation of self-cleaning techniques further ensures consistent performance of the manufacturing system.
Description
Technical field
The present invention relates to be used to improve a kind of method and apparatus that the molded fiber formed body is produced.
Background technology
The product of being made by molded fiber is environmental protection.The raw material of production molded fiber products derive from the agriculture residues for the treatment of as discarded object usually.Different with paper pulp, the fiber that derives from agriculture residues does not need strict the processing before they are used.When molded fiber products is processed when falling, they are biodegradable and emission neutral.
Molded fiber shaping physical efficiency is as food Package, industrial product, consumer products and other many products.It has good shock-absorbing capacity, and can use at any time and do not need cutting, crooked and folding.It is also very light and be easy to stacking, and this has reduced storage and transport space.Molded fiber packing is that the selection of a kind of cost economical and environmental protection is in order to substitute existing plastics and wrapper.
The vacuum thermoforming method that employing has the low-consistency fiber slurry of water-based adhesive can be used to produce molded fiber formed body (referring to patent application SG20016232-2).Low-consistency fiber slurry has fiber less than one of percentage (weight) usually in water, is poured in the vacuum forming mould.Existing vacuum forming mould is made up of even isolated boring, and it allows liquid and air to pass through.Described boring is connected with vacuum plant.Must place a sieve on the vacuum forming mould to guarantee after beginning is handled in vacuum forming, depositing the uniform fibers layer in its surface.Described sieve is made by the woven wire according to described die forming usually.Described sieve is used for two main purposes.At first, liquid is taken away by vacuum power so that fiber is retained on the sieve as filter; Secondly, on its whole surface, redistribute vacuum power equably so that the deposition of fiber is even.
The fiber that is deposited is subjected to solidifying to form final product by heat and pressure.The heat and the pressure that act on the mould also will cause described sieve quick aging.As a result, wire mesh sieve will be worn and torn in the hot forming process after the cyclic process of limited number of times and be damaged.And, after each cyclic process, be entangled in the efficient and the distribution of the fiber residue reduction vacuum on the sieve deposit.At last, sieve will be plugged and be ineffective.
The use of wire mesh sieve was tested in the production of paper and molded pulp products.Yet, have some defectives, for example because wearing and tearing and the damaged frequent replacing that needs sieve; The product surface that contacts with described sieve normally quality coarse and can not accept on attractive in appearance for some users; The wire sieve need be fixed on the mould and this occupies expensive real estate on the mould.Obviously, owing to need cleaning and finally change described wire mesh sieve, productivity ratio is subjected to very big influence.
Although the molded pulp formed body is used wire mesh sieve quite successful in process of production, yet molded fiber is different in many aspects.The fiber that comes from agriculture residues is a lignocellulose.Molded fiber uses adhesive that fiber is bonded together and forms tough and tensile formed body, and it more has mechanical strength than suitable molded pulp.Molded pulp does not need external adhesive because cellulose fibre can be bonded to each other naturally.As a result, molded fiber production causes woven wire to wear and tear sooner than molded pulp.For molded fiber production because the use releasing agent of adhesive is another problem.Mould design and the material that must seek to select are so that overcome in the molded fiber formed body is produced and use the relevant problem of wire mesh sieve.
The energy consumption that is used for the production molded pulp is quite high.Lot of energy consumption is being molded as in the body by heating, drying.Two kinds of major techniques of molded pulp heat oven dry have drying tunnel (drying tunnel) and are dry in mould.The drying tunnel technology occupies huge space and causes mold formed body deformability.Dry technology imposes on it with heat when being molded as body and still being in the mould in mould, and therefore produces product with better precision and performance.It also needs littler space.Will be in mould in most of existing document drying be called in mould and solidify.There is misleading technically in this, because molded pulp does not need to solidify, it only needs drying.On the other hand, molded fiber needs heat cure also thus lignocellulose to be bonded together with the chemokinesis adhesive.Drying is a physical phenomenon and to solidify be chemical phenomenon.
Be appreciated that address the above problem with cause molded fiber products produce in huge productivity ratio improve and their price competitiveness thus.
The U.S. Pat 6083447 that is entitled as " vacuum forming of fiber slurry " discloses a kind of method and apparatus that uses porous mold production molded pulp product, and described mould immerses in the fiber slurry.The unresolved problem that wherein applies the thermo shaping method of heat and pressure of this invention.The releasing agent problem is not discussed and it is only limited to molded pulp rather than molded plant fiber.
The U.S. Pat 5529479 that is entitled as " the thermoformable pad mould with hot gas supply and recirculation " discloses the use porous mold and has been used for discharging gas from mould cavity when plastic components is heated.
The U.S. Pat 6302671 that is entitled as " porous mold that is used for roll support and pitch structure " has been described a kind of method, and porous mold is used to make a shaping molded pulp structure with at least one roller of support net material energetically.
Summary of the invention
Make the improved manufacture method and the equipment that adopts low-consistency fiber slurries vacuum forming and heat cure that the invention discloses of molded fiber formed body.
An object of the present invention is to improve the productivity ratio of making the molded fiber formed body.The porous material of making required form as the mold insert in vacuum forming mould and the thermoset mold to save the use of sieve.As a result, production is lowered downtime, because no longer need keep and change sieve on vacuum forming and thermoset mold., applying vacuum extracts liquid out from slurries after as the mold insert in the vacuum forming method with porous material, the conforming layer of wet fiber is deposited on the porous mold insert.Described porous mold insert is redistributed vacuum power on its whole surface equably.The hole that the porous mold insert has opening and interconnection passes through to another surface to allow liquid and air from a surface.According to the Size Distribution of fibrous material, the size in the hole of porous mold insert is between 5 microns to 200 microns scope.The size in preferred described hole is less than minimum fiber size, so that do not cause the obstruction of hole path.
Another object of the present invention is to make the body that is molded as of finished product can be from the thermoset mold demoulding behind curing process.Curing process uses a pair of matched mold, wherein applies heat and pressure.Heat that is applied and pressure produce steam and steam must discharge from the matched mold of closing up.The insert of at least one matched mold is made of porous materials, and can be taken away by vacuum plant steam thus.Under the situation of the mold insert that mould only is made of porous materials, then another die surface is clung mould by abundant roughening with the molded fiber formed body that prevents heat cure.The die surface of described porous mold surface and roughening has scope 8 microns to 40 microns roughness.Roughness greater than 40 microns allows, but will influence the attractive in appearance of finished product formed body.Be different from smooth surfaced mold, designed roughness can be structured between die surface and the molded fiber formed body a large amount of microcosmic air pockets.Described air pocket reduces the bonding between molded fiber formed body and the thermoset mold.The surface itself of noting the porous mold insert is coarse.Described porous material, preferred porous metals have enough mechanical strengths to stand to apply the total amount of heat and pressure in curing process.The heating-up temperature scope is from 100 degrees centigrade to 200 degrees centigrade.Shown in the pressure that adds at 0.5MPa in the scope of 5MPa.
Another object of the present invention is to reduce energy consumption in producing the molded fiber formed body in addition.Most of energy consumption is in curing process, and wherein a large amount of heat energy are used for the too much moisture of dry wet fibre forming body.Be appreciated that the amount that reduces moisture in the wet fiber formed body will reduce heat energy.The use of optimization mechanical dehydration device of the present invention is included in the water content in the wet fiber formed body of making by the vacuum forming process with minimizing.It is top mold and bottom die that vacuum forming method adopts the mould of a pair of coupling.Top mold and bottom die are opened to allow fiber slurry to add.Water in the fiber slurry passes that described porous mold insert is taken away by vacuum plant so that form the conforming layer of wet fiber formed body on bottom die.In order to extract more moisture out from the wet fiber formed body, top mold and bottom die are closed up and are sealed to prevent that air from permeating during the vacuum dehydration of wet fiber formed body.Simultaneously, top mold and bottom die apply slight pressure to the wet fiber formed body.When the moisture that comprises in the wet fiber formed body reached predeterminated level, in the scope of 20% to 50% (weight), the mechanical dehydration process stopped usually.If note top mold and not sealing of bottom die when closing up, vacuum dehydration is invalid, because will extract the water in ambient air rather than the wet fiber formed body out.
Another object of the present invention is by reducing maintenance for the porous mold insert in conjunction with being arranged on inner self-cleaning device in addition.Self-cleaning device comprises the use of ultrasonic transducer and recoil.Vacuum forming porous mold insert is subjected to the occlusive effects that produces because of fiber clamp easily in the hole.The vacuum forming mold insert that gets clogged will influence the uniformity of molded fiber formed body and increase energy consumption.Finally, the vacuum forming mold insert that gets clogged is with ineffective.According to the present invention, the vacuum forming mold insert cleans with ultrasonic method and recoil.
Description of drawings
Fig. 1 is the block diagram of improved molded fiber formed body production method.
Fig. 2 is illustrated in the vacuum forming station viewgraph of cross-section of open position, has fiber slurry in fiber slurry container.
Fig. 3 illustrates the viewgraph of cross-section at vacuum forming station, and it has the top mold and the bottom die of closing up.
Fig. 4 is illustrated in the viewgraph of cross-section at the heat cure station of open position, and the wet fiber formed body is placed on the bottom die insert.
Fig. 5 is illustrated in the heat cure station of closed position.
Fig. 6 illustrates an example system, its have side by side vacuum forming and the heat cure station so that the transmission of wet fiber formed body.
Fig. 7 illustrates the decomposition view of vacuum forming bottom die, and described vacuum forming bottom die has the porous mold insert, the mold platform of opening is arranged and the vacuum chamber of slurry container is arranged.
The specific embodiment
Described improved molded fiber formed body production method comprises four key steps.They are (1) fiber slurry preparation; (2) vacuum forming and (3) heat cure and (4) post processing.
Described production method starts from the pre-treatment of fiber slurry.Fully refining string for example is added into a mixing channel from the fiber that palm oil, cocoanut shell, hemp, mestha and other fibrous plants obtain.Described mixing channel energy water fills in advance or water can add simultaneously with described fiber.The amount of fiber be percent 0.1 to 5 (weight) with respect in the water of 99.9 to 95 percent (weight).Fiber is stirred so that they are dispersed in the water by the agitator of for example impeller.Described low consistency fiber mixture is fully stirred up to obtaining uniform slurries.Then water-based adhesive join in the mixing channel and whole mixture by continuous stirring.Stirring action causes that adhesive attachment is to fiber.The adhesive that works for example adhesive, wet strong adhesive and a spot of releasing agent for example solid paraffin be added into described slurries.Whole mixture is stirred until obtaining uniform mixture.The mixed with fibers slurries will be fed to the vacuum forming process.Described mixed with fibers slurries are stored in the surge tank usually, and described surge tank has enough feeds the ability of giving to some vacuum forming heat cures machineries.Described surge tank is kept uniform state by continuous stirring to guarantee fiber slurry.
The purpose of vacuum forming process 101 is to produce wet fiber formed body 10 by fiber slurry 12.Described wet fiber formed body 10 has shape, thickness and the uniformity of expection.Being included in moisture in the wet fiber formed body 10, to be controlled thus it should not be too wet and consume too many heat energy in the heat cure stage; And it should not be too dried so that curing process 102 an activated adhesive binder fiber fully.
In one embodiment of the invention, the top mold 30 at vacuum forming station 101 is to make up with bottom die 20 similar modes.Top mold also is made of two parts, and they are: porous positive mold insert 31 and mold platform 32.Vacuum chamber 33 is structured in the mold platform 32.Vacuum plant 15 is connected with vacuum chamber 33.Mold platform 32 has many openings 36.Porous positive mold insert 31 is fixed on the opening 36 of mold platform 32.Porous mold insert 31 is connected with vacuum plant 15 by vacuum chamber 33.Vacuum chamber 33 also allows compressed air to pass porous mold insert 31.Mold platform 32 is made by pore-free material.
The top mold 30 at vacuum forming station 101 can vertically move 39 thus top mold 30 can descend and accurately cooperate with bottom die 20.The guiding device that is fit to is structured in top mold 30 and the bottom die 20 the accurate cooperation when helping two moulds to close up.When vacuum shaping top mold 30 and bottom die 20 were closed up fully, the space 45 between two moulds 20 and 30 was airtight substantially.Do the time spent when applying vacuum draw simultaneously, can on the mould 20 and 30 that closes up, keep slight pressure to help from 10 water squeezings of wet fiber formed body.Airtight space 45 increases the effect of vacuum dehydration, because there is not the generation of ambient air infiltration.Should notice that it is very effectively to utilize energy that vacuum dehydration is compared with the heat dehydration.Do not have suitable aeroseal between top mold 30 and bottom die 30, vacuum can will be wasted because surrounding air will be taken away rather than wet fiber formed body 10 in water.
An amount of fiber slurry 12 is by in the slurry container 28 of dispensing 29 to the vacuum forming station 101.Fiber slurry 12 fills up slurry container 28 and covers bottom die 20.In case reach suitable capacity, vacuum plant 15 activated extracts water out.Under vacuum draw, the hole that the water in the fiber slurry 12 passes in the porous mold insert 22 enters vacuum chamber 23 and discharges vacuum forming station 101.One deck wet fiber is deposited on the surface formation wet fiber formed body 10 of mold insert 22 then.Because the hole average-size of porous mold is less than fiber size, fiber is prevented from passing from described hole.Equally distributed hole helps to distribute equably pull of vacuum on the surface of whole porous mold insert 22.This causes and generate uniform one deck wet fiber formed body 10 on the surface of mold insert 22.In this stage, wet fiber formed body 10 comprises the water more than 50% usually.Described wet fiber formed body 10 did not solidify in this stage.
After vacuum forming process 101, wet fiber formed body 10 with heat cure to activate the adhesive in the wet fiber formed body 10.Described curing process also is depressed into molded fiber formed body 80 thickness of expection.In a preferred embodiment, wet fiber formed body 10 is mentioned by vacuum forming top mold 30.When the top that closes up and bottom die 30 and 20 began separately, vacuum 15 was applied on the top mold 30, and vacuum 15 stops from bottom die 20.In order further to be convenient to the separation of wet fiber formed body 10 from bottom die 20, compressed air is pumped through the hole of vacuum chamber 23 and process bottom die insert 22.The described compressed air that comes out from bottom mold surface helps wet fiber formed body 10 is pushed open.The impetus of the pulling function of top mold 30 and bottom die 20 is guaranteed the smooth transfer of wet fiber formed body 10 to top mold 30.Top mold 30 moves into necessary path so that wet fiber formed body 10 is moved into heat cure station 102 then.
The purpose at heat cure station 102 is to apply heat and pressure with cure adhesive and fiber is bonded together forms final shape and size thus.Heat cure station 102 also is made up of the mould 50 and 60 of a pair of coupling, and is similar with vacuum forming station 101.To be the heat cure mould standing than the vacuum forming mould ability aspect high pressure and the temperature more in basic difference.Temperature in 100 to 200 degrees centigrade of scopes is applied to thermoset mold.Institute's applied pressure is in the scope of 0.5MPa to 5MPa.The mould of described a pair of coupling is heat cure top mold 60 and heat cure bottom die 50.Heat cure bottom die 50 is made up of three major parts.They are thermoset mold matrixes, mold insert 52 and heater 58.Heat cure matrix 51 comprises many cavitys compositions that hold mold insert 52.The through hole 53 as air duct of q.s is structured in the die matrix 51 described cavity is connected to vacuum plant 15.These through holes 53 also make compressed air pass through.When porous mold insert 52 cooperated with thermoset mold matrix 51, they also were connected to vacuum plant 15.Mold insert 52 preferably for example make by porous metals by copper alloy (bronze) or aluminium alloy.Die matrix 51 is by heater 58 heating.In a preferred embodiment, heater 58 is and the fixing electric heating structure of the base portion of die matrix 51.Heater 58 also can be included in the heating tube of the heat transfer fluid body of circulation in the die matrix 51.High heat transference efficiency must be guaranteed to obtain in the maximum surface of contact between heater 58 and die matrix 51.Because similarly reason it is also important that the maximum contact surface that guarantees between die matrix 51 and porous mold insert 52.The main difference of design aspect becomes apparent between vacuum forming mould and thermoset mold. Vacuum forming mould 20 and 30 have big vacuum chamber 23 and 33 and passage with the transmission of optimization vacuum and the extraction of water; And thermoset mold 50 and 60 have less vacuum passage 53 and 63 and have heater 58 and 67 and mold insert 52 and 62 between the contact big surface with optimum structured thermal transfer.
Heat cure top mold 60 also is made up of three major parts, and they are die matrix 61, mold insert 62 and heater 67.Top mold insert 62 accurately cooperates with relative bottom mold insert 52.When top mold 60 and bottom die 50 are closed up fully, stay next slit, this gap is identical with the thickness of the molded fiber formed body of doing 80.Guiding device for example directing pin can be used for helping top and bottom die 60 and 50 alignment during closing up.Airtight space is formed between two apparent surfaces of top and bottom die 60 and 50.Vacuum is created within this space and the required temperature of water evaporates that is included in the wet molded fiber formed body 10 can be reduced.This principle to vacuum drying oven is similar.Heat that is applied and pressure make the adhesive in the molded fiber formed body solidify and make it to be shaped to the shape and the thickness of final expection.Because being contained in the steam of the evaporation generation of moisture in the molded fiber formed body 80 passes vacuum passage 53 and 63 discharges and leaves described station 102.When the heat cure circulation was finished, then top and bottom die 60 and 50 were opened to discharge molded fiber formed body 80.The compressed air of passing vacuum chamber 54 helps molded fiber formed body 80 to separate from mold insert 52.Heat cure top mold 60 or additional mentioning with apparatus for placing can be used for molded fiber formed body 80 is moved to suitable collecting region.Similarly, compressed air also helps to make the molded fiber formed body to separate from top mold insert 62.
The demoulding is the subject matter during the molded fiber formed body is produced.The present invention uses surface that porous mold insert and roughening cross to reduce the bonding of molded fiber formed body to die surface.Notice that the porous mold surface is enough coarse.In the situation when the top mold insert is made without porous material, then the surface of bottom die insert will be by abundant roughening.Being used to make the coarse a kind of routine techniques of die surface is by sandblasting, usually in the scope of 8 to 40 microns roughness.The die surface of porous mold and coarse processing forms the microcosmic air pocket of random distribution between molded fiber formed body and die surface, it thoroughly reduces their bondings to each other.Because the air cleaning that the porous mold insert produces is further auxiliary, molded fiber formed body 80 can be easily from mould separating.
The fiber fines that porous mold insert 22 on the vacuum forming station 101 is absorbed in the described hole easily blocks.The described fiber that is absorbed in adhesive must be eliminated to keep the function of porous mold insert 22.According to the kind of the fiber that uses and the size in size and hole, the thickness and the porosity of mold insert, porous mold insert 22 will lose their effectiveness after certain operation cycle.
The invention discloses and use ultrasonic cleaning technology and recoil to be used to finish the self-cleaning of porous mold insert.If not in conjunction with self-cleaning function, because the forfeiture of the obstruction porous of fiber and impurity, the availability of porous mold will be restricted.Ultrasonic transducer is installed on the fiber slurry container 28 of vacuum forming mould 20.Water is injected in the bottom mold slurry container 28, and fully covers all porous mold inserts 22.Ultrasonic transducer is opened then.Described ultrasonic transducer produces ultrasonic wave, and its generation infiltrates through the micro-bubble in described hole.These micro-bubbles produce continuously and break.Breaking of micro-bubble helps to make the fiber and other impurity that are absorbed in the described hole to break away from.In order more to help the cleaning of porous mold insert, use recoil.Recoil is to be finished by the compressed air that is pumped in the vacuum chamber, and it forces water, fiber and impurity to shift out the porous mold insert.The effectiveness that ultrasonic wave cleans and recoils in conjunction with recovery vacuum forming mould.Described here be built in inner self-cleaning function usually cost finish and in hundreds of circulations, only need several seconds and carry out once.
Heat cure molded fiber shaping physical efficiency further is post-treated station 103 and handles, and for example coating, stamp, deburring, sterilization and packing are handled in post processing station 103.These post-processing approachs and equipment are known in described field, and do not discuss at this.
The preferred embodiments of the invention disclose the use at independent vacuum forming station, heat cure station, and each station uses porous mold insert to allow the demoulding and the uniformity of molded fiber formed body is improved.It also discloses use, the especially vacuum dehydration of mechanical dehydration device, and to obtain the two-forty that water is removed from the wet fiber formed body, it causes the minimizing that energy consumes.It also further allows described porous mold insert by using the self-cleaning of compressed-air actuated recoil in conjunction with ultrasonic transducer with introducing.The preferred embodiments of the invention have improved the productivity ratio that the molded fiber formed body is produced.
Claims (18)
1. produce improving one's methods of molded fiber formed body for one kind, it comprises that use low concentration plant fibre slurry liquid stands vacuum forming to form wet fiber formed body and the described wet fiber formed body of heat cure to generate final molded fiber formed body; It is characterized in that porous material is used as the mold insert of vacuum forming and heat cure.
2. improving one's methods of production molded fiber formed body as claimed in claim 1 is characterized in that, vacuum forming method is made up of a pair of matched mold with porous mold insert, to produce the wet fiber formed body of uniform thickness by vacuum plant.
3. improving one's methods of production molded fiber formed body as claimed in claim 2 is characterized in that, when being closed up when obtaining wet fiber formed body vacuum dehydration efficiently, the vacuum forming mould is by effective seal.
4. improving one's methods of production molded fiber formed body as claimed in claim 1 is characterized in that, thermal curing methods is made up of a pair of matched mold with porous mold insert, and described porous mold insert is heated by heater.
5. improving one's methods of production molded fiber formed body as claimed in claim 4 is characterized in that, described thermoset mold is effectively sealed when being closed up, and solidifies the required heat energy of described molded fiber formed body to reduce.
6. improving one's methods of production molded fiber formed body as claimed in claim 1 is characterized in that, the porous mold insert in the vacuum forming mould is by ultrasonic wave and recoiling device cleaning.
7. be used to produce the equipment of molded fiber formed body, it comprises three stations, i.e. fiber slurry preparation station, vacuum forming station and heat cure station.
8. the equipment that is used to produce the molded fiber formed body as claimed in claim 7 is characterized in that, the vacuum forming station comprises a pair of matched mold that is arranged in top and the bottom device.
9. the equipment that is used to produce the molded fiber formed body as claimed in claim 8, described vacuum forming bottom die by a mold platform, a fiber slurry container and the vacuum chamber that is used to connect vacuum plant and blowing plant form, described mold platform has the opening that is used to install the porous mold insert.
10. the equipment that is used to produce the molded fiber formed body as claimed in claim 7, it is characterized in that, described vacuum forming top mold is made up of the mold platform with the opening that is used for mold insert, and the bottom die insert of described mold insert and shaping is complementary.
11. the equipment that is used to produce the molded fiber formed body as claimed in claim 10 is characterized in that, vacuum forming top mold platform comprises the vacuum chamber that connects vacuum plant and blowing plant.
12. the equipment that is used to produce the molded fiber formed body as claimed in claim 11 is characterized in that, vacuum top and bottom die can vertically move and close up airtightly, with ambient air infiltration during preventing the vacuum dehydration process to the wet fiber formed body.
13. the equipment that is used to produce the molded fiber formed body as claimed in claim 12 is characterized in that ultrasonic transducer is installed on the fiber slurry container.
14. the equipment that is used to produce the molded fiber formed body as claimed in claim 7 is characterized in that, thermoset mold comprises a pair of matched mold that is arranged in top and the bottom die device.
15. the equipment that is used to produce the molded fiber formed body as claimed in claim 14 is characterized in that, the heat cure top mold is made up of the atresia die matrix with optimization air duct and thermo-contact surface.
16. the equipment that is used to produce the molded fiber formed body as claimed in claim 15 is characterized in that, the heat cure bottom die is made up of the atresia die matrix with optimization air duct and thermo-contact surface.
17. the equipment that is used to produce the molded fiber formed body as claimed in claim 16, it is held to levy and is, thereby heat cure top mold and heat cure bottom die can vertically move and close up to apply heat and pressure and the wet fiber formed body solidified generate the molded fiber formed body.
18. the equipment that is used to produce the molded fiber formed body as claimed in claim 7 is characterized in that, the porous mold insert that is used for the heat cure station is preferably made by porous metals.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SG2002/000030 WO2003074789A1 (en) | 2002-02-26 | 2002-02-26 | Improved molded fiber manufacturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1623022A true CN1623022A (en) | 2005-06-01 |
Family
ID=27786698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA028286812A Pending CN1623022A (en) | 2002-02-26 | 2002-02-26 | Improved molded fiber manufacturing |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20050150624A1 (en) |
| EP (1) | EP1492926B1 (en) |
| CN (1) | CN1623022A (en) |
| AT (1) | ATE359397T1 (en) |
| DE (1) | DE60219534T2 (en) |
| WO (1) | WO2003074789A1 (en) |
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| CN101494178B (en) * | 2008-01-23 | 2010-11-10 | 旭丽电子(广州)有限公司 | Photoelectric semiconductor package device and package method |
| CN104499380A (en) * | 2014-12-18 | 2015-04-08 | 广西大学 | Method for producing seedling breeding container from fibrous solid wastes |
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-
2002
- 2002-02-26 WO PCT/SG2002/000030 patent/WO2003074789A1/en active IP Right Grant
- 2002-02-26 EP EP02703036A patent/EP1492926B1/en not_active Expired - Lifetime
- 2002-02-26 DE DE60219534T patent/DE60219534T2/en not_active Expired - Fee Related
- 2002-02-26 CN CNA028286812A patent/CN1623022A/en active Pending
- 2002-02-26 US US10/505,728 patent/US20050150624A1/en not_active Abandoned
- 2002-02-26 AT AT02703036T patent/ATE359397T1/en not_active IP Right Cessation
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| CN114379114A (en) * | 2020-10-19 | 2022-04-22 | 维美德技术有限公司 | Production line for moulding fibre products |
| CN115162057A (en) * | 2022-07-25 | 2022-10-11 | 永发（江苏）模塑包装科技有限公司 | Ultrasonic wave reinforced dewatering equipment for pulp molding and using process |
| CN115162057B (en) * | 2022-07-25 | 2024-02-02 | 永发（江苏）模塑包装科技有限公司 | Ultrasonic reinforced dewatering equipment for pulp molding and use process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US20050150624A1 (en) | 2005-07-14 |
| WO2003074789A1 (en) | 2003-09-12 |
| ATE359397T1 (en) | 2007-05-15 |
| DE60219534D1 (en) | 2007-05-24 |
| DE60219534T2 (en) | 2007-12-27 |
| EP1492926A1 (en) | 2005-01-05 |
| EP1492926B1 (en) | 2007-04-11 |
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