JPH0841800A - Fiber formed product, formation of the same and apparatus therefor - Google Patents

Abstract

PURPOSE:To provide both a method for forming a fiber formed product by which the fiber formed product, useful for annular packings, etc., and formed into a desired shape can simply be obtained from the beginning without forming a fibrous material with a punching die and an apparatus for forming fibers. CONSTITUTION:This method for forming a fiber formed product is to inject water from a water supply tank 5 into a water holding and dehydrating tank of a forming device so as to locate the water level above a wire cloth 6, inject a liquid raw material prepared by mixing desired vegetable fibers with mineral fibers, a filler, a chemical and water from a raw material tank 4 into a raw material receiving part 9E, lift an inner cylinder valve 9D, lower the liquid raw material downward, normally or reversibly turn agitating blades 9B, agitate the resultant raw material mixture, then open an opening and closing valve 7C, drain water, dehydrate and form a fiber formed product 11 on the wire cloth 6 in a frame mold 8 by suction from a suction port 7F with a vacuum, then lift the parts above the frame mold 8 upward, rotate the wire cloth in the direction of a dryer 3, dry the fiber formed product 11, subsequently lower the parts above the frame mold 8 and repeat these steps described above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber molded product and a molding method and apparatus therefor, and in particular, a fiber molded product obtained by punching the middle portion of the molded product can be molded without using a die. A molding method and a molding device.

[0002]

2. Description of the Related Art Conventionally, a polishing disk substrate, a heat-resistant packing, a cotton roll substrate, a clutch plate substrate and the like are prepared by impregnating a fibrous sheet-like material into a chemical tank and impregnating it with a chemical, or It has been common practice to punch a product mold from a sheet-shaped material in advance and impregnate it with a chemical, and then punch the final product mold.

[0003]

SUMMARY OF THE INVENTION In the above conventional method,
Since the doughnut-shaped disc-shaped or complicated packing or insulating material is stamped out from the sheet-shaped base material, a considerable amount of the base material is wasted and the product yield (including chemicals)
However, there was a drawback that the cost was high. For example, as is well known in the manufacture of packing for cylinders, not only the outer circumference of a desired cylinder circle from a rectangular base material is discarded, but also the inner circumference other than the cylinder thickness is discarded. Therefore, since such waste is also a part of the base material impregnated with the chemical, naturally, special treatment is required as industrial waste, and there is a drawback that the treatment cost is added. Various problems are also pointed out regarding G. For example, the orientation of the fibers of the material sheet molded on the endless rotary papermaking machine is determined by the relationship between the flow velocity discharged from the raw material box nozzle and the traveling speed of the papermaking machine. The tensile strength is measured by sampling the flow direction of the normal material and the width direction of the sheet to the same dimension,
The quality is judged by the strength difference of each, but the fiber orientation is
After the material is impregnated with chemicals, distortion occurs or tends to occur,
Moreover, uniform quality cannot be obtained because it varies depending on the fiber direction and affects the strength. Especially weighing 400-650
In the case of further producing a product of g / square meter, the fibers are poorly dispersed, and it is difficult to obtain a uniform formation. Further, the chemical impregnation is not uniform. It is unavoidable that there are many occurrences. In view of such circumstances, the present invention was developed for the purpose of providing a fiber molded product which is obtained as a uniform quality and does not need to discard an unnecessary portion, and a molding method and apparatus therefor.

[0004]

The present invention has taken the following technical means in order to solve the above problems and achieve the objects. That is,

(A). Arrange a papermaking machine on the upper part of the water retention and dehydration tank that has water supply and dehydration functions, and arrange the formwork on it.
Further, a molding device having a stirring tank is arranged on the upper part of the mold, and water is externally supplied to the water-holding / dehydrating tank so that the water level in the device reaches a higher level than the papermaking net, and then the fiber is used as a main raw material in the stirring tank The liquid raw material is supplied, the stirring blade is rotated to stir the liquid raw material, and then the water in the water retaining and dehydrating tank is dehydrated, and the wet raw material in the tank is also dehydrated, and the mold of the formwork is formed on the net. 1. A method for molding a fiber molded product, which comprises forming the fiber molded product.

(B). A molding device in which an endless machine is rotatably arranged on the upper part of a water retention and dehydration tank having water supply and dehydration functions, a formwork is arranged on it, and a stirring tank is arranged on the upper part.
A fiber molding apparatus comprising a raw material tank for supplying a liquid raw material to the molding apparatus, a water supply tank, and a drying apparatus for pressing the endless papermaking machine outside the molding apparatus to dry the molded article.

(C). It is composed of a fiber molded product that is dehydrated and molded in a state in which the liquid raw material put in a mold is stirred to prevent the fibers in the raw material from being oriented and agglomerated to make the dispersion uniform.

[0008]

The present invention constructed as described above has the following actions.

That is, in the above (B), the water retaining / dehydrating tank has a function of forcibly dehydrating by vacuum and a function of closing the dehydrating port and opening the water supply port to retain water and raising the water level to the stirring tank. have. When a liquid raw material obtained by mixing mineral fibers such as vegetable fibers, carbon and glass, and an appropriate amount of filler, chemicals, and water is put into a stirring tank, water is dehydrated from the endless netting machine to a water retaining and dehydrating tank below. In this case, if the water level is set higher than that of the papermaking machine based on the above method (A), the liquid raw material will be in the form of riding on water. Only the raw materials are stirred. However, when the water in the water retention / dehydration tank is drained and vacuum suction is performed, the liquid material above the papermaking net is dehydrated, and the formwork is on the papermaking net. Molded products can be made. Therefore, if the water retention / dehydration tank and the form are separated, the endless web can be rotated, so that the molded product rides on the endless web and moves outward. At the destination, the drying device dries the fiber molding (see FIG. 2). As a result, for example, in the case of a donut-shaped packing, a donut-shaped fiber molded product can be prepared from the beginning, instead of punching by a punching as in the past. Looking at this fiber molded product, in the conventional material fiber sheet, since the liquid raw material was discharged directly from the stock solution tank onto the advancing papermaking net, the direction of the fibers was in a fixed direction, In this method, since the fibers are stirred in a stirring tank, the directionality of the fibers is irregular and uniform, and a molded product having no difference in strength and width can be obtained.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the entire apparatus, and FIG. 2 is a central vertical front view of the molding apparatus. The fiber molding device 1 is a molding device 2
And a drying device 3, a raw material tank 4, a water supply tank 5, an endless papermaking machine 6 and the like. As described in detail in FIG. 2, the molding device 2 has a water retention / dehydration tank 7 arranged at the bottom thereof, and
The form 8 and the stirring tank 9 are stacked. The water retaining / dehydrating tank 7 has a drain groove 7A formed at a lower end portion thereof and is connected to a water distribution pipe 7B. An on-off valve 7C (automatic,
(Combined manually) is provided. A water receiving tray 7D is arranged below the discharge pipe 7B. A water supply port 7E and a suction port 7F are formed on the side wall of the water retention / dehydration tank 7, and a water supply pipe 5A connected to the water supply port 7E is connected to the water supply tank 5. Reference numerals 5B and C are water supply valves. The suction pipe 10A (see FIG. 1) connected to the suction port 7F is connected to the vacuum pump 10. An elastic contact material 7G is arranged on the upper part of the water retention / dehydration tank 7. The contact member 7G is matched with the mold of the mold 8 placed on the upper side, and the upper surface is made of a material having a sealing property. An endless papermaking machine 6 is disposed on the water retaining / dewatering tank 7, and the endless papermaking machine 6 is formed in an annular shape by rotating both longitudinal ends thereof below the water tank 7.
As shown in FIG. 5, it is wound around a plurality of support rolls 6B, a drive roll 6A, and a press roll 6C so as to be endlessly rotatable. A water removing box (water absorption) for removing water adhering to the paper making machine 6 is provided on the lower surface of the endless paper making machine 6 as shown by reference numeral 6D in FIG. The mold 8 is detachably attached to the lower end of the stirring tank 9.
Shows nut type. That is, an annular outer mold 8A and an inner mold 8
Made of B. Inner mold 8B when obtaining a plate-shaped molded product
Not used. The stirring tank 9 is a cylindrical body having no bottom, a drive shaft 9A is pivotally attached to an upper bearing portion 9H at the center of the plane, and is rotated alternately in the forward and reverse directions by a drive machine (not shown).
Agitating blades 9B, 9B, ... Are radially arranged on the drive shaft 9A. Further, a pillar 9C is vertically provided concentrically below the drive shaft 9A, and the inner mold 8B is attached to the lower end of the pillar 9C as required. An inner cylinder valve 9D is disposed so as to be able to move up and down in the upper part of the stirring tank 9 and above the stirring blade 9B, and a raw material receiving portion 9E is formed between the inner cylinder valve 9D and the stirring tank wall. Has been done. A charging port 9F is formed in the upper part of the raw material receiving portion 9E, and the tip of the feed pipe 4A of the raw material tank 4 faces. In this structure, the inner cylinder 9D descends and acts as a valve that closes the bottom of the raw material receiving portion 9E. This is because when the liquid raw material is charged from the raw material tank 4 from one place, the liquid raw material is once stored in the raw material receiving portion 9E and the inner cylinder valve 9D is raised to lower the liquid raw material in an annular shape. As shown in FIG. 1, in the dryer 3, the lower end of the base of the endless rotary blanket 3 </ b> A is brought into pressure contact with the upper end edge of the endless papermaking machine 6 at the rotary tip of the endless papermaking machine 6. The endless rotating blanket 3A
Is a plurality of support rolls 3B ..., Press rolls 3C, 3D,
It is wound around and rotates. In the figure, reference numeral 3E is a pickup tube, 3F is an air supply nozzle, and 3G is a dehydrator. The pickup tube 3E has an intake force and sucks the fiber molding 11 on the paper making machine 6 to the blanket 3A to transfer it. Further, the air supply nozzle 3G transfers the fiber molded product 11 adhering to the blanket 3A onto the conveyor 3H by blowing air. A molding product manufacturing process in the apparatus 1 configured as described above will be described. In FIG. 2, the opening / closing valve 7C and the suction port 7F of the drainage port 7A are closed, the water supply valves 5B and 5C of the water supply tank 5 are opened, and water is introduced to the lower end of the stirring blade 9B. Next, inner cylinder 9
D is lowered to open the on-off valve 4B of the raw material tank 4, and the liquid raw material (a desired base material is mixed with pulp, chemicals, filler, and water at a constant concentration) is put into the raw material receiving portion 9E. Then, the inner cylinder 9D is raised to lower the liquid raw material from the raw material receiving portion 9E. Then, the stirring blade 9B is rotated in the reverse direction in the range of 10 degrees to 90 degrees. As a result, the fibers in the liquid raw material have a non-uniform orientation, aggregation is prevented, and dispersion is uniform. In particular, since there is water below the paper making machine 6, the water content of the liquid raw material does not drop at a stretch and the stirring efficiency is improved. Next, when the on-off valve 7C is opened and drained, the water content in the liquid raw material also drops, and the fibrous material forms a layer on the papermaking net 6 between the outer mold 8A and the inner mold 8B to form the fiber molded product 11. It is formed. When the vacuum pump 10 sucks through the suction port 7F, the fiber molded product 11 on the papermaking machine 6 is dehydrated.
Next, when the supporting frame 9G is lifted by an elevating means (not shown), the mold 8 is lifted up from the paper making machine 6, and the fiber molded product 11 remains on the paper making machine 6. Therefore, when the drive roll 6A is moved to advance the paper making machine 6 toward the drying device 3, the fiber molded article 11 on the paper making machine 6 is pressed by the blanket 3A to squeeze water. In addition, the fiber molded product is sucked at the pickup tube 3E and separated from the paper making machine 6 to be adsorbed to the blanket 3A. Subsequently, the fiber molded product pressed by the press roll 3D is separated from the blanket 6 by the air blown from the nozzle 3F at the air supply nozzle 3F and is transferred onto the conveyor 3H. The fiber molded product 11 carried by the conveyor 3H is heated and dried by the heating press device 3J. The dried fiber molded product 11 is post-treated according to the purpose by a conventional method. These steps can be automated by automatic control. As shown in a plan view in FIG. 3, a plurality of molding devices 2 can be arranged side by side in a row and column, but in one molding device 2, as shown in FIGS. Molded articles can be formed. That is, in FIG. 4, a plurality of donut-shaped molds 8C ... Is formed on the outer mold 8A, and the periphery of the outer mold 8A is a downward slope.
The surface is 8D. Dette-nut type 8C
Inner mold 8B in the central part of ... has a circular shape and the upper part has taper surface 8E.
The upper part of each inner mold 8B is connected to the outer mold 8A by a thin support 8F. Therefore, if water is added up to the upper part of the mold 8 and the liquid raw material is agitated and drained on it, the liquid raw material slides on the taper surfaces 8D and 8E and enters the mold 8C to form a plurality of fiber molded products at one time. To be done. Further, an auxiliary raw material tank can be provided separately from the raw material tank 4. The auxiliary raw material tank holds a drug or raw material for another purpose, and can be added to the liquid raw material during or after the stirring. The present invention is not limited to the above-mentioned embodiment, and the design can be changed appropriately. For example, it is possible to use a mold which is formed as one body by stretching a paper making net on the lower surface of the mold.

[0011]

As described above, the present invention has the following excellent effects.

A. By filling the upper part of the net with water, there is an effect that the initial dehydration of the liquid raw material put in the stirring tank can be prevented.

B. Since the liquid raw material is stirred on water, the liquid raw material is prevented from aggregating the fibers of the raw material without being dehydrated, and the directionality of the fibers can be irregularly equalized, and as a result, the quality can be improved. There is an effect that can be done.

C. Since the form is placed on the paper making net and agitated on the form, it is possible to immediately supply a uniform raw material to the form by agitating. Therefore, quality can be made uniform,
Moreover, since the doughnut-shaped mold can be formed by the mold frame, there is an effect that the waste of the base material due to the punching can be omitted and that the punching waste material which causes the pollution is not generated.

D. Since there is a dehydration tank just below the mold, the fiber molded product molded in the mold can be vacuum dehydrated on the spot, which has the effect of reliably molding the mold of the molded product. is there. As described above, the present invention can exert various effects without regret, so that it can exert a remarkable effect particularly in each base material field such as a polishing disk, a heat-resistant packing, a control, a clutch plate and a molded product.
A wide range of applications in such industrial fields can be expected.

[Brief description of drawings]

FIG. 1 is a front view of a fiber molding device.

FIG. 2 is a central vertical front view of a molding apparatus.

FIG. 3 is a plan view of a molding device.

FIG. 4 is a plan view showing a second embodiment of the mold.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

[Explanation of symbols]

 1 Fiber Forming Device 2 Forming Device 3 Drying Device 3A Endless Rotating Blanket 3B Support Roll 3C Press Roll 3D Main Press Roll 3E Pickup Tube 3F Air Supply Nozzle 3G Dehydrator 3H Conveyor 3J Heat Drying Device 4 Raw Material Tank 4A Feeding pipe 4B Open / close valve 5 Water supply tank 5A Water supply pipe 5B, 5C Water supply valve 6 Endless netting 6A Drive roll 6B Support roll 6C Press roll 6D Water removal box 7 Water retaining / dehydrating tank 7A Drain port 7B Drain pipe 7C Open / close Valve 7D Water tray 7E Water inlet 7F Suction port 7G Contact material 8 Form 8A Outer mold 8B Inner mold 8C Mold 8D, 8F Tape surface 8E Support material 9 Stirring tank 9A Drive shaft 9B Stirring blade 9C Strut 9D Inner cylinder valve 9E Raw material receiving part 9F Input port 9G Support frame 9H Bearing part 10 Vacuum pump 11 Fiber molding

Claims (3)

[Claims] 1. A molding apparatus in which a paper making net is arranged above a water retaining and dehydrating tank having water supply and dewatering functions, a mold is arranged on the mesh, and a stirring tank is arranged above the mold. After supplying water from the outside to the water retaining / dehydrating tank so that the water level of the above reaches the upper level of the paper making machine, the liquid raw material containing fiber as the main raw material is supplied to the stirring tank, and the stirring blade is rotated to stir the liquid raw material. A method for molding a fiber molded article, which comprises dehydrating water in a water retaining / dehydrating tank and dehydrating a wet raw material in the tank to form a fiber molded article on a net in a mold. 2. A molding apparatus in which an endless netting machine is rotatably arranged on an upper part of a water-holding / dehydrating tank having water supply and dehydration functions, a mold is arranged thereon, and a stirring tank is arranged on the upper part thereof.
A fiber molding apparatus comprising a raw material tank for supplying a liquid raw material to the molding apparatus, the water supply tank, an endless papermaking machine, and a drying apparatus for drying a molded product outside the molding apparatus. 3. A fiber molded product obtained by dehydration molding in a state where the liquid raw material charged in a mold is agitated to prevent the orientation and aggregation of the fibers in the raw material and to make the dispersion uniform.