CA2154147A1 - Fibrous molded product, its molding method and its molding apparatus - Google Patents
Fibrous molded product, its molding method and its molding apparatusInfo
- Publication number
- CA2154147A1 CA2154147A1 CA 2154147 CA2154147A CA2154147A1 CA 2154147 A1 CA2154147 A1 CA 2154147A1 CA 2154147 CA2154147 CA 2154147 CA 2154147 A CA2154147 A CA 2154147A CA 2154147 A1 CA2154147 A1 CA 2154147A1
- Authority
- CA
- Canada
- Prior art keywords
- raw material
- water
- tank
- molded product
- forming net
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/16—Slip casting, i.e. applying a slip or slurry on a perforated or porous or absorbent surface with the liquid being drained away
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/305—Spray-up of reinforcing fibres with or without matrix to form a non-coherent mat in or on a mould
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Paper (AREA)
Abstract
This invention provides a method for and an apparatus for easily getting a fibrous molded product molded in advance into a desired shape without molding an annular packing or the like such as a fibrous raw material under no application of a punching die. Water is poured into the water holding and dehydration tank of the molding apparatus 2 in advance in such a way that its water level becomes above the forming net 6, liquid raw material having desired plant fibers, mineral fibers, filling agent, chemicals and water mixed from each other is poured from the raw material tank into the raw material receiving part 9E, the inner cylindrical valve 9D is lifted up to cause the liquid raw material to be moved down, the agitating vanes 9B are reversed to rotate in a clockwise or a counter-clockwise direction so as to agitate the material, thereafter the opening or closing valve 7C is opened to discharge water, vacuum suction is applied at the suction port 7F and then the fibrous molded product 11 left on the forming net 6 within each of the mold frames 8 is dehydrated and molded. After this operation, the mold frames 8 are lifted up, the forming net is rotated toward the drying device 3 and then the fibrous molded product 11 is dried.
Subsequently, the mold frames 8 are moved down and the aforesaid steps are repeated. Since the mold frames 8 shown in the drawings can form the sheet-like fibrous molded products, immersion of resin or chemicals in these products may become annular packings.
Subsequently, the mold frames 8 are moved down and the aforesaid steps are repeated. Since the mold frames 8 shown in the drawings can form the sheet-like fibrous molded products, immersion of resin or chemicals in these products may become annular packings.
Description
- 21~147 TITLE OF THE lNvLL.,ION
FIBROUS MOLDED PRODUCT, ITS MOLDING METHOD AND ITS
MOLDING APPARATUS
RacR~ROUND OF THE lNvL..~ION
Field of the Invention This invention relates to a fibrous molded product, its molding method and its molding apparatus, and more particularly, a molding method and a molding apparatus in which the fibrous molded product capable of being produced with its intermediate portion being opened out of it and its molding can be performed without using any punching die.
Description of the Related Art As the prior art methods for making a grinding disc substrate, a heat-resistance packing, a cotton roll substrate and a clutch plate substrate or the like, it has been generally applied to have a method for putting a raw material of fibrous sheet into a chemical liquid tank and immersing it with chemical liquid or another method in which a form of the product is punched out in advance from a raw material sheet, immersed in chemical liquid and then punched into a final product form.
In the aforesaid prior art method, a doughnùt-shaped disc or packing having a complex shape or insulating material and the like was punched out with a die, so that there were some problems that a substantial amount of substrate material became useless to cause a poor yield of product (including - 215~1~7 chemical liquid) to be attained and a high cost of the product occurred.
As well known in the prior art, in the case that a cylinder packing is manufactured, for example, not only all the outer circular circumferential portions of a desired cylinder are deposited from the rectangular substrate material but also the inner circumferential portions other than the thickness of the cylinder are deposited, and such waste material is of a part of the material immersed with chemical liquid requiring a special treatment if it is deposited as industrial waste material, so that it requires an additional cost of processing and further, various disadvantages are also pointed out for the paper-like raw material sheet. Although an arrangement of fibers constituting the raw material sheet formed on an endless rotating net is determined in reference to a relation between a flow rate of the fibers injected from a raw material box nozzle and an advancing rate of the net, a good state or a bad state of this arrangement of the fibers is discriminated normally by sampling the same sizes in the flowing direction of the raw material and the width direction of the sheet and measuring the tensile strengths in both directions of the raw material, the fiber arrangement shows that a certain strain may easily occur or occurs after immersion of chemical liquid in the raw material or the fiber arrangement is different in view of the direction of the fibers, influences over its strength and then a uniform quality may not be attained. In particular, in the case that the product having a weight of 21~147 about 400 to 650 g/m2 is manufactured by one forming operation, dispersion of the fibers is bad and its uniform base material can not be attained, immersion of chemical liquid is not uniform, resulting in that a frequent occurrence of a sheet having insufficient strength can not be avoided.
SU~ARY OF T~E ~r~v~:~.ION
In view of the foregoing practical situation, it is an object of the present invention to provide a fibrous molded product, its molding method and its molding apparatus in which uniform quality can be attained and non-required portions may not be deposited.
This invention has accomplished the following technical means in order to resolve the aforesaid issues and attain the object, i.e.
(A) A molding method for molding a fibrous molded product characterized in that a forming net is arranged above a water holding and dehydration tank having water feeding and dehydrating functions, mold frames are arranged on the forming net, a molding device having an agitating tank is arranged above the mold frames, water is supplied from outside to the water holding and dehydrating tank in such a way that a water level in the device reaches at a higher location than that of the forming net, thereafter liquid raw material having fibers as its main raw material is supplied to the agitating tank, the agitating vanes are rotated to agitate the liquid raw material, then water in the water - 215~1g7 holding and dehydrating tank is dehydrated and at the same time wet raw material in the tank is dehydrated to form the fibrous molded product having a form of each of the mold frames on the forming net.
(B) An apparatus for molding a fibrous mold characterized in that the same is comprised of a molding device in which an endless forming net is rotatably arranged above a water holding and dehydrating tank having a water supplying function and a dehydrating function, mold frames are arranged above the forming net and an agitating tank is arranged above the mold frames; a raw material tank for supplying liquid raw material to the molding device, a water supplying tank, and a drying device for press contacting the molded product out of the endless forming net and the molding device so as to dry the molded product.
(C) A fibrous molded product which is dehydrated and molded under a condition in which the liquid raw material fed into mold frames is agitated to prohibit direction characteristic and condensation of the fibers in the raw material while the dispersion is being unified.
This invention constructed as described above has the following actions.
That is, in the aforesaid (B), the water holding and dehydrating tank has a function of forced dehydration under a vacuum operation and another function capable of closing a dehydration port, opening the water feeding port to keep water and increasing its water level up to the agitating tank. When liquid raw material having plant fibers, mineral 21S~1~7 fibers of carbon, glass, a proper amount of filling material, chemicals and water mixed from each other is fed into the agitating tank, moisture is dehydrated from the endless forming net into the lower water holding and dehydration tank. In this case, when the water level is increased up to a higher position than that of the forming net in accordance with the method described in the above (A), the liquid raw material rides on the water, so that rotation of agitating vanes causes only the liquid raw material to be agitated. In this way, when water in the water holding and dehydration tank is discharged so as to be vacuum sucked, the liquid raw material above the forming net is dehydrated and the mold frame is present on the forming net, resulting in that the wet molded product of fibrous material strictly corresponding to the shape of the mold frame can be formed. Then, the water holding and dehydration tank is separated from the mold frame, resulting in that the endless forming net can freely rotate and so the molded product rides on the endless forming net to move outward. At the far moving location, the drying device dries the fibrous molded product (refer to Fig.2).
With such operations above, a doughnut-shaped packing, for example, can be formed not with the prior art punching by a punching mold, but the fibrous molded product having originally a donut-shaped form can be formed. As regards this fibrous molded product, the prior art raw material fibrous sheet has a direction of the fiber directed toward a specified direction due to the fact that the liquid raw material is directly injected from the raw material liquid 21~147 tank, although in the present invention, the direction of the fiber is in an irregular one and has a uniformity and further it can be attained as the molded product having no difference in vertical or lateral direction in view of its strength due to the fact that the raw material is agitated within the agitating tank.
As described above, the present invention has the following superior effects.
A. It has an effect that it is possible to prevent the liquid raw material placed in the agitating tank from being initially dehydrated by fulfilling water over the forming net.
B. It has some effects that condensation of fibers of the raw material can be prevented while the liquid raw material is not dehydrated, the direction characteristic in the fibers can be set to be irregular and unified and as a result quality of the product can be improved since the liquid raw material is agitated on the water.
C. Since the mold frame is arranged on the forming net and the material is agitated on it, it is possible to agitate the material and supply uniform raw material immediately to the mold frame.
Accordingly, the present invention has some effects that uniform quality can be attained, molding of the doughnut-shaped product can be attained with the mold frame, so that useless state of the substrate material under punching operation can be saved and occurrence of the punched disposed 2 1 ~ 7 materials which are causes of the pollution can be eliminated.
D. Since the dehydration tank is placed just below the mold frame, it has some effects that the fibrous molded product molded within the mold frame can be vacuum dehydrated at that site and the mold for the molded product can be positively formed.
As described above, since the present invention can realize completely the various effects, remarkable effects can be attained in each of the fields such as a grinding disc, an anti-heat packing, a control device, a clutch plate and a molded product and the like, so that a wide range of application in the industrial field can be expected.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig.l is a front elevational view for showing a fibrous material molding apparatus.
Fig.2 is a front elevational view in a central longitudinal section of the molding apparatus.
Fig.3 is a top plan view of the molding apparatus.
Fig.4 is a top plan view for showing a second preferred embodiment of the molding frame.
Fig.5 is a sectional view taken along a line A-A of Fig.4.
DESCRIPTION OF THE PREF~-~R~n EMBODIMENTS
Referring now to the drawings, the preferred embodiments of the present invention will be described. Fig.l is a front 215~1~7 elevational view for showing an entire apparatus. Fig.2 is a front elevational view at a central longitudinal section of the molding apparatus. A fibrous material molding apparatus 1 is comprised of molding devices 2, a drying device 3, a raw material tank 4, a water supplying tank 5 and an endless forming net 6 and the like. As illustrated in detail in Fig.2, the aforesaid molding device 2 has a water holding and dehydration tank 7 at the lower part of it, and the mold frame 8 and the agitating tank 9 are overlapped on it. The aforesaid water holding and dehydration tank 7 is formed with a drain groove 7A at its lower end and has a water feeding pipe 7B connected thereto. The aforesaid water drain port 7A
is provided with an opening or closing valve 7C (both for automatic and manual operations). A water receiving pan 7D is arranged below the discharging pipe 7B. The side wall of the water holding and dehydration tank 7 is formed with a water feeding port 7E and a suction port 7F, wherein the water feeding pipe 5A connected to the water feeding port 7E is connected to the water feeding tank 5. Reference numerals 5B
and 5C denote water feeding valves. A suction pipe lOA
connected to the aforesaid suction port 7F (refer to Fig.l) is connected to a vacuum pump 10. At the upper part of the water holding and dehydration tank 7 is arranged a resilient contact member 7G. The contact member 7G is coincided with a mold of the mold frame 8 mounted above and its upper surface has a sealing material quality. An endless forming net 6 is arranged above the water holding and dehydration tank 7. The endless forming net 6 is constructed such that its both 21~4147 longitudinal ends are formed to be circular around a lower part of the water tank 7, the forming net is wound around a plurality of supporting rolls 6B...., a driving roll 6A, and a press roll 6C as shown in Fig.1 and can be constructed to be endless and rotatable. At the lower surface of the endless forming net 6 is installed a dehydration box (water suction) for use in removing water adhered to the forming net 6. The aforesaid mold frames 8 are removably installed at the lower ends of the agitating tanks 9 and their shape is a doughnut-shape as shown in the figure. That is, the mold frame is comprised of an annular outer mold 8A and an annular inner mold 8B. In the case that a plate-like molded product is to be attained, the inner mold 8B is not used. The agitating tank 9 is a cylinder having no bottom part, a driving shaft 9A is pivotally supported at a flat central part of an upper bearing 9H and rotated alternatively in a clockwise or a counter-clockwise direction by a driving mechanism not shown in the figure. Agitating vanes 9B, 9B,....are radially arranged at the aforesaid driving shaft 9A. A supporting column 9C is vertically arranged at the lower part of the driving shaft 9A, and the aforesaid inner mold 8B is installed at the lower end as required. An inner cylindrical valve 9D is arranged at an inner upper part of the agitating tank 9 and above the agitating vanes 9B in such a manner that it can be moved up or down, and a raw material receiving part 9E is formed between the inner cylindrical valve 9D and the wall of the agitating tank. The upper part of the raw material receiving part 9E is formed with a feeding port 9F
21591~7 and an extremity end of a feeding pipe 4A of the raw material tank 4 is placed near it. With such an arrangement as above, the inner cylinder 9D is moved down and acts as a valve for closing the bottom part of the raw material receiving part 9E. In the case that the liquid raw material is fed from the raw material tank 4, the material is inputted at only one locati-on, so that the material is once stored at the raw material receiving part 9E and the inner cylindrical valve 9D
is moved up to cause the liquid raw material to be moved down in an annular form. As shown in Fig.l, the drying device 3 is constructed such that the lower part of the base end of the endless rotating blanket 3A is press contacted with an extremity upper end of the endless forming net 6 at the rotating extremity end of the endless forming net 6. The endless rotating blanket 3A is wound around a plurality of supporting rolls 3B..., press rolls 3C, 3D and rotated.
Reference numeral 3E denotes a pick-up tube, reference numeral 3F denotes an air feeding nozzle-and reference numeral 3G denotes a dehydration device. The pick-up tube 3E
has a sucking force and the fibrous molded product 11 on the forming net 6 is sucked against the blanket 3A and transferred to the blanket. In addition, a air feeding nozzle 3G transfers the fibrous molded product 11 adhered on the blanket 3A onto a conveyor 3H with injected air.
A manufacturing step of molding the product in the device 1 constructed as described above will be described. In Fig.2, both an opening or closing valve 7C at the water drain port 7A and a suction port 7F are closed, water feeding valves 5B
21S41~7 and SC in the water feeding tank 5 are opened and water is fed up to the lower ends of the agitating vanes 9B. Then, the inner cylinder 9D is moved down, the opening or closing valve 4B of the raw material tank 4 is opened, the liquid raw material (pulp, chemicals, filling material and water are mixed to desired substrate material under a specified rate) is put into the raw material receiving part 9E. After this operation, the inner cylinder 9D is moved up and the liquid raw material is moved down form the raw material receiving part 9E in a downward direction. Then, the agitating vanes 9B
are rotated alternatively in normal or reverse direction within a range of 10 Aato gOAa. With such an arrangement as above, directions of the fibers in the liquid raw material are made irregular,their consolidation is prohibited and their dispersion is unified. In particular, since water is present below the forming net 6, moisture in the liquid raw material does not drop at once and then an agitating efficiency is improved. Then, the opening or closing valve 7C
is opened to discharge water, resulting in that moisture in the liquid raw material is also dropped, the fibrous material forms a layer on the forming net 6 between the outer mold 8A
and the inner mold 8B and the fibrous molded product 11 is formed. Then, the moisture is sucked by a vacuum pump 10 at the suction port 7F, resulting in that the fibrous molded product 11 on the forming net 6 is dehydrated. Then, as the supporting frame 9G is lifted up by a lifting means not shown, the mold frame 8 is moved away from the forming net 6 and lifted up and the fibrous molded product 11 is left on 21591~7 the forming net 6. Then, as the driving roll 6A is moved to cause the forming net 6 to be advanced toward the drying device 3, the fibrous molded product 11 left on the forming net 6 is pressed by the blanket 3A and moisture contained in the product is squeezed. In addition, the fibrous molded product is sucked at the part of the pick-up tube 3E, moved away from the forming net 6 and adsorbed against the blanket 3A. Subsequently, the fibrous molded product pressed by the press rolls 3D is moved away from the blanket 3A at the air feeding nozzle 3F with injection air injected from the nozzle 3F and the product is transferred onto a conveyor 3H. The fibrous molded product 11 carried by the conveyor 3H is heated by a heating and pressing device 3J and dried by it. A
post-treatment coinciding with the object is carried out for the dried fibrous molded product 11 by the conventional method. These steps can be automated by an automatic control.
As shown by a top plan view of Fig.3, a plurality of molding devices 2 can be arranged side-by-side in a vertical and a lateral orientation. However, as shown in Figs.4 and 5, a plurality of molded products can be formed once by dividing the mold frame 8 into a plurality of segments in one molding device 2. That is, in Fig.4, a plurality of doughnut-shaped molds 8C.. are formed at the outer mold 8A and their surrounding portions are applied as tapered surfaces 8D........ directed downward. However, inner molds 8B... at the central part of each of the doughnut-shaped molds 8C are conical in shape, their upper portions are of tapered surfaces 8E, each of the upper portions of the inner walls 21 ~ 7 8B..... is connected to the outer mold 8A with the thin supporting members 8F. Accordingly, if water is poured up to the upper end of the mold frame 8, the liquid raw material is agitated afterward and water is drained, the liquid raw material slides on the tapered surfaces 8D and 8E, enters the molds 8C and then a plurality of fibrous molded products are once formed. In addition, a sub-raw material tank can be installed in addition to the raw material tank 4. This sub-raw material tank holds chemicals or raw materials having other objects and these materials can be added to the liquid raw material during agitation or after agitation. It is apparent that this invention is not limited to the aforesaid preferred embodiments, but its design can be properly modified. For example, it is possible to use the mold frame integrally formed with the forming net at the lower surface of the mold frame.
FIBROUS MOLDED PRODUCT, ITS MOLDING METHOD AND ITS
MOLDING APPARATUS
RacR~ROUND OF THE lNvL..~ION
Field of the Invention This invention relates to a fibrous molded product, its molding method and its molding apparatus, and more particularly, a molding method and a molding apparatus in which the fibrous molded product capable of being produced with its intermediate portion being opened out of it and its molding can be performed without using any punching die.
Description of the Related Art As the prior art methods for making a grinding disc substrate, a heat-resistance packing, a cotton roll substrate and a clutch plate substrate or the like, it has been generally applied to have a method for putting a raw material of fibrous sheet into a chemical liquid tank and immersing it with chemical liquid or another method in which a form of the product is punched out in advance from a raw material sheet, immersed in chemical liquid and then punched into a final product form.
In the aforesaid prior art method, a doughnùt-shaped disc or packing having a complex shape or insulating material and the like was punched out with a die, so that there were some problems that a substantial amount of substrate material became useless to cause a poor yield of product (including - 215~1~7 chemical liquid) to be attained and a high cost of the product occurred.
As well known in the prior art, in the case that a cylinder packing is manufactured, for example, not only all the outer circular circumferential portions of a desired cylinder are deposited from the rectangular substrate material but also the inner circumferential portions other than the thickness of the cylinder are deposited, and such waste material is of a part of the material immersed with chemical liquid requiring a special treatment if it is deposited as industrial waste material, so that it requires an additional cost of processing and further, various disadvantages are also pointed out for the paper-like raw material sheet. Although an arrangement of fibers constituting the raw material sheet formed on an endless rotating net is determined in reference to a relation between a flow rate of the fibers injected from a raw material box nozzle and an advancing rate of the net, a good state or a bad state of this arrangement of the fibers is discriminated normally by sampling the same sizes in the flowing direction of the raw material and the width direction of the sheet and measuring the tensile strengths in both directions of the raw material, the fiber arrangement shows that a certain strain may easily occur or occurs after immersion of chemical liquid in the raw material or the fiber arrangement is different in view of the direction of the fibers, influences over its strength and then a uniform quality may not be attained. In particular, in the case that the product having a weight of 21~147 about 400 to 650 g/m2 is manufactured by one forming operation, dispersion of the fibers is bad and its uniform base material can not be attained, immersion of chemical liquid is not uniform, resulting in that a frequent occurrence of a sheet having insufficient strength can not be avoided.
SU~ARY OF T~E ~r~v~:~.ION
In view of the foregoing practical situation, it is an object of the present invention to provide a fibrous molded product, its molding method and its molding apparatus in which uniform quality can be attained and non-required portions may not be deposited.
This invention has accomplished the following technical means in order to resolve the aforesaid issues and attain the object, i.e.
(A) A molding method for molding a fibrous molded product characterized in that a forming net is arranged above a water holding and dehydration tank having water feeding and dehydrating functions, mold frames are arranged on the forming net, a molding device having an agitating tank is arranged above the mold frames, water is supplied from outside to the water holding and dehydrating tank in such a way that a water level in the device reaches at a higher location than that of the forming net, thereafter liquid raw material having fibers as its main raw material is supplied to the agitating tank, the agitating vanes are rotated to agitate the liquid raw material, then water in the water - 215~1g7 holding and dehydrating tank is dehydrated and at the same time wet raw material in the tank is dehydrated to form the fibrous molded product having a form of each of the mold frames on the forming net.
(B) An apparatus for molding a fibrous mold characterized in that the same is comprised of a molding device in which an endless forming net is rotatably arranged above a water holding and dehydrating tank having a water supplying function and a dehydrating function, mold frames are arranged above the forming net and an agitating tank is arranged above the mold frames; a raw material tank for supplying liquid raw material to the molding device, a water supplying tank, and a drying device for press contacting the molded product out of the endless forming net and the molding device so as to dry the molded product.
(C) A fibrous molded product which is dehydrated and molded under a condition in which the liquid raw material fed into mold frames is agitated to prohibit direction characteristic and condensation of the fibers in the raw material while the dispersion is being unified.
This invention constructed as described above has the following actions.
That is, in the aforesaid (B), the water holding and dehydrating tank has a function of forced dehydration under a vacuum operation and another function capable of closing a dehydration port, opening the water feeding port to keep water and increasing its water level up to the agitating tank. When liquid raw material having plant fibers, mineral 21S~1~7 fibers of carbon, glass, a proper amount of filling material, chemicals and water mixed from each other is fed into the agitating tank, moisture is dehydrated from the endless forming net into the lower water holding and dehydration tank. In this case, when the water level is increased up to a higher position than that of the forming net in accordance with the method described in the above (A), the liquid raw material rides on the water, so that rotation of agitating vanes causes only the liquid raw material to be agitated. In this way, when water in the water holding and dehydration tank is discharged so as to be vacuum sucked, the liquid raw material above the forming net is dehydrated and the mold frame is present on the forming net, resulting in that the wet molded product of fibrous material strictly corresponding to the shape of the mold frame can be formed. Then, the water holding and dehydration tank is separated from the mold frame, resulting in that the endless forming net can freely rotate and so the molded product rides on the endless forming net to move outward. At the far moving location, the drying device dries the fibrous molded product (refer to Fig.2).
With such operations above, a doughnut-shaped packing, for example, can be formed not with the prior art punching by a punching mold, but the fibrous molded product having originally a donut-shaped form can be formed. As regards this fibrous molded product, the prior art raw material fibrous sheet has a direction of the fiber directed toward a specified direction due to the fact that the liquid raw material is directly injected from the raw material liquid 21~147 tank, although in the present invention, the direction of the fiber is in an irregular one and has a uniformity and further it can be attained as the molded product having no difference in vertical or lateral direction in view of its strength due to the fact that the raw material is agitated within the agitating tank.
As described above, the present invention has the following superior effects.
A. It has an effect that it is possible to prevent the liquid raw material placed in the agitating tank from being initially dehydrated by fulfilling water over the forming net.
B. It has some effects that condensation of fibers of the raw material can be prevented while the liquid raw material is not dehydrated, the direction characteristic in the fibers can be set to be irregular and unified and as a result quality of the product can be improved since the liquid raw material is agitated on the water.
C. Since the mold frame is arranged on the forming net and the material is agitated on it, it is possible to agitate the material and supply uniform raw material immediately to the mold frame.
Accordingly, the present invention has some effects that uniform quality can be attained, molding of the doughnut-shaped product can be attained with the mold frame, so that useless state of the substrate material under punching operation can be saved and occurrence of the punched disposed 2 1 ~ 7 materials which are causes of the pollution can be eliminated.
D. Since the dehydration tank is placed just below the mold frame, it has some effects that the fibrous molded product molded within the mold frame can be vacuum dehydrated at that site and the mold for the molded product can be positively formed.
As described above, since the present invention can realize completely the various effects, remarkable effects can be attained in each of the fields such as a grinding disc, an anti-heat packing, a control device, a clutch plate and a molded product and the like, so that a wide range of application in the industrial field can be expected.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig.l is a front elevational view for showing a fibrous material molding apparatus.
Fig.2 is a front elevational view in a central longitudinal section of the molding apparatus.
Fig.3 is a top plan view of the molding apparatus.
Fig.4 is a top plan view for showing a second preferred embodiment of the molding frame.
Fig.5 is a sectional view taken along a line A-A of Fig.4.
DESCRIPTION OF THE PREF~-~R~n EMBODIMENTS
Referring now to the drawings, the preferred embodiments of the present invention will be described. Fig.l is a front 215~1~7 elevational view for showing an entire apparatus. Fig.2 is a front elevational view at a central longitudinal section of the molding apparatus. A fibrous material molding apparatus 1 is comprised of molding devices 2, a drying device 3, a raw material tank 4, a water supplying tank 5 and an endless forming net 6 and the like. As illustrated in detail in Fig.2, the aforesaid molding device 2 has a water holding and dehydration tank 7 at the lower part of it, and the mold frame 8 and the agitating tank 9 are overlapped on it. The aforesaid water holding and dehydration tank 7 is formed with a drain groove 7A at its lower end and has a water feeding pipe 7B connected thereto. The aforesaid water drain port 7A
is provided with an opening or closing valve 7C (both for automatic and manual operations). A water receiving pan 7D is arranged below the discharging pipe 7B. The side wall of the water holding and dehydration tank 7 is formed with a water feeding port 7E and a suction port 7F, wherein the water feeding pipe 5A connected to the water feeding port 7E is connected to the water feeding tank 5. Reference numerals 5B
and 5C denote water feeding valves. A suction pipe lOA
connected to the aforesaid suction port 7F (refer to Fig.l) is connected to a vacuum pump 10. At the upper part of the water holding and dehydration tank 7 is arranged a resilient contact member 7G. The contact member 7G is coincided with a mold of the mold frame 8 mounted above and its upper surface has a sealing material quality. An endless forming net 6 is arranged above the water holding and dehydration tank 7. The endless forming net 6 is constructed such that its both 21~4147 longitudinal ends are formed to be circular around a lower part of the water tank 7, the forming net is wound around a plurality of supporting rolls 6B...., a driving roll 6A, and a press roll 6C as shown in Fig.1 and can be constructed to be endless and rotatable. At the lower surface of the endless forming net 6 is installed a dehydration box (water suction) for use in removing water adhered to the forming net 6. The aforesaid mold frames 8 are removably installed at the lower ends of the agitating tanks 9 and their shape is a doughnut-shape as shown in the figure. That is, the mold frame is comprised of an annular outer mold 8A and an annular inner mold 8B. In the case that a plate-like molded product is to be attained, the inner mold 8B is not used. The agitating tank 9 is a cylinder having no bottom part, a driving shaft 9A is pivotally supported at a flat central part of an upper bearing 9H and rotated alternatively in a clockwise or a counter-clockwise direction by a driving mechanism not shown in the figure. Agitating vanes 9B, 9B,....are radially arranged at the aforesaid driving shaft 9A. A supporting column 9C is vertically arranged at the lower part of the driving shaft 9A, and the aforesaid inner mold 8B is installed at the lower end as required. An inner cylindrical valve 9D is arranged at an inner upper part of the agitating tank 9 and above the agitating vanes 9B in such a manner that it can be moved up or down, and a raw material receiving part 9E is formed between the inner cylindrical valve 9D and the wall of the agitating tank. The upper part of the raw material receiving part 9E is formed with a feeding port 9F
21591~7 and an extremity end of a feeding pipe 4A of the raw material tank 4 is placed near it. With such an arrangement as above, the inner cylinder 9D is moved down and acts as a valve for closing the bottom part of the raw material receiving part 9E. In the case that the liquid raw material is fed from the raw material tank 4, the material is inputted at only one locati-on, so that the material is once stored at the raw material receiving part 9E and the inner cylindrical valve 9D
is moved up to cause the liquid raw material to be moved down in an annular form. As shown in Fig.l, the drying device 3 is constructed such that the lower part of the base end of the endless rotating blanket 3A is press contacted with an extremity upper end of the endless forming net 6 at the rotating extremity end of the endless forming net 6. The endless rotating blanket 3A is wound around a plurality of supporting rolls 3B..., press rolls 3C, 3D and rotated.
Reference numeral 3E denotes a pick-up tube, reference numeral 3F denotes an air feeding nozzle-and reference numeral 3G denotes a dehydration device. The pick-up tube 3E
has a sucking force and the fibrous molded product 11 on the forming net 6 is sucked against the blanket 3A and transferred to the blanket. In addition, a air feeding nozzle 3G transfers the fibrous molded product 11 adhered on the blanket 3A onto a conveyor 3H with injected air.
A manufacturing step of molding the product in the device 1 constructed as described above will be described. In Fig.2, both an opening or closing valve 7C at the water drain port 7A and a suction port 7F are closed, water feeding valves 5B
21S41~7 and SC in the water feeding tank 5 are opened and water is fed up to the lower ends of the agitating vanes 9B. Then, the inner cylinder 9D is moved down, the opening or closing valve 4B of the raw material tank 4 is opened, the liquid raw material (pulp, chemicals, filling material and water are mixed to desired substrate material under a specified rate) is put into the raw material receiving part 9E. After this operation, the inner cylinder 9D is moved up and the liquid raw material is moved down form the raw material receiving part 9E in a downward direction. Then, the agitating vanes 9B
are rotated alternatively in normal or reverse direction within a range of 10 Aato gOAa. With such an arrangement as above, directions of the fibers in the liquid raw material are made irregular,their consolidation is prohibited and their dispersion is unified. In particular, since water is present below the forming net 6, moisture in the liquid raw material does not drop at once and then an agitating efficiency is improved. Then, the opening or closing valve 7C
is opened to discharge water, resulting in that moisture in the liquid raw material is also dropped, the fibrous material forms a layer on the forming net 6 between the outer mold 8A
and the inner mold 8B and the fibrous molded product 11 is formed. Then, the moisture is sucked by a vacuum pump 10 at the suction port 7F, resulting in that the fibrous molded product 11 on the forming net 6 is dehydrated. Then, as the supporting frame 9G is lifted up by a lifting means not shown, the mold frame 8 is moved away from the forming net 6 and lifted up and the fibrous molded product 11 is left on 21591~7 the forming net 6. Then, as the driving roll 6A is moved to cause the forming net 6 to be advanced toward the drying device 3, the fibrous molded product 11 left on the forming net 6 is pressed by the blanket 3A and moisture contained in the product is squeezed. In addition, the fibrous molded product is sucked at the part of the pick-up tube 3E, moved away from the forming net 6 and adsorbed against the blanket 3A. Subsequently, the fibrous molded product pressed by the press rolls 3D is moved away from the blanket 3A at the air feeding nozzle 3F with injection air injected from the nozzle 3F and the product is transferred onto a conveyor 3H. The fibrous molded product 11 carried by the conveyor 3H is heated by a heating and pressing device 3J and dried by it. A
post-treatment coinciding with the object is carried out for the dried fibrous molded product 11 by the conventional method. These steps can be automated by an automatic control.
As shown by a top plan view of Fig.3, a plurality of molding devices 2 can be arranged side-by-side in a vertical and a lateral orientation. However, as shown in Figs.4 and 5, a plurality of molded products can be formed once by dividing the mold frame 8 into a plurality of segments in one molding device 2. That is, in Fig.4, a plurality of doughnut-shaped molds 8C.. are formed at the outer mold 8A and their surrounding portions are applied as tapered surfaces 8D........ directed downward. However, inner molds 8B... at the central part of each of the doughnut-shaped molds 8C are conical in shape, their upper portions are of tapered surfaces 8E, each of the upper portions of the inner walls 21 ~ 7 8B..... is connected to the outer mold 8A with the thin supporting members 8F. Accordingly, if water is poured up to the upper end of the mold frame 8, the liquid raw material is agitated afterward and water is drained, the liquid raw material slides on the tapered surfaces 8D and 8E, enters the molds 8C and then a plurality of fibrous molded products are once formed. In addition, a sub-raw material tank can be installed in addition to the raw material tank 4. This sub-raw material tank holds chemicals or raw materials having other objects and these materials can be added to the liquid raw material during agitation or after agitation. It is apparent that this invention is not limited to the aforesaid preferred embodiments, but its design can be properly modified. For example, it is possible to use the mold frame integrally formed with the forming net at the lower surface of the mold frame.
Claims (3)
1. A molding method for molding a fibrous molded product characterized in that a forming net is arranged above a water holding and dehydration tank having water feeding and dehydration functions, mold frames are arranged on the forming net, a molding device having an agitating tank is arranged above the mold frames, water is supplied from outside to the water holding and dehydration tank in such a way that a water level in the device reaches at a higher location than that of the forming net, thereafter liquid raw material having fibers as its main raw material is supplied to the agitating tank, the agitating vanes are rotated to agitate the liquid raw material, then water in the water holding and dehydration tank is dehydrated and at the same time wet raw material in the tank is dehydrated to form the fibrous molded product having a form of each of the mold frames on the forming net.
2. An apparatus for molding a fibrous mold characterized in that the same is comprised of a molding device in which an endless forming net is rotatably arranged above a water holding and dehydration tank having a water supplying function and a dehydration function, mold frames are arranged above the forming net and an agitating tank is arranged above the mold frames; a raw material tank for supplying liquid raw material to the molding device, a water supplying tank, and a drying device for press contacting the molded product out of the endless forming net and the molding device so as to dry the molded product.
3. A fibrous molded product which is dehydrated and molded under a condition in which the liquid raw material fed into mold frames is agitated to prohibit direction characteristic and condensation of the fibers in the raw material while the dispersion is being unified.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6-192247 | 1994-07-25 | ||
| JP19224794A JPH0841800A (en) | 1994-07-25 | 1994-07-25 | Fiber formed product, formation of the same and apparatus therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2154147A1 true CA2154147A1 (en) | 1996-01-26 |
Family
ID=16288120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2154147 Abandoned CA2154147A1 (en) | 1994-07-25 | 1995-07-18 | Fibrous molded product, its molding method and its molding apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0841800A (en) |
| CA (1) | CA2154147A1 (en) |
| DE (1) | DE19527165A1 (en) |
| SE (1) | SE9502683L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002020991A (en) * | 2000-07-06 | 2002-01-23 | Nsk Warner Kk | Method and apparatus for papermaking |
| JP2002020990A (en) * | 2000-07-06 | 2002-01-23 | Nsk Warner Kk | Method and apparatus for papermaking |
-
1994
- 1994-07-25 JP JP19224794A patent/JPH0841800A/en active Pending
-
1995
- 1995-07-18 CA CA 2154147 patent/CA2154147A1/en not_active Abandoned
- 1995-07-24 SE SE9502683A patent/SE9502683L/en not_active Application Discontinuation
- 1995-07-25 DE DE1995127165 patent/DE19527165A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE19527165A1 (en) | 1996-02-01 |
| SE9502683D0 (en) | 1995-07-24 |
| SE9502683L (en) | 1996-01-26 |
| JPH0841800A (en) | 1996-02-13 |
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