JP2011208289A - Pulp-molded product and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate stripe-shaped unevenness inevitably formed at the site corresponding to a boundary part of small blocks in a pulp-molded product by constituting a molding mold in a shape in which the whole region of the molding mold surface can hardly be covered with a single wire net by constituting the mold of a single member not being the combination of the small blocks.SOLUTION: The pulp-molded product 10 is integrally formed so as to have a plurality of storing units in which each part 12, 13 forms a thin plate shape, and which have storing concave parts 12 and extended parts 13 extended to the surroundings of the opening parts of the concave parts 12, and so that the mutually neighboring storing units may be mutually connected by terminal edges of the extended parts 13 of the storing units. The connecting parts of the terminal edges of the extended parts of the neighboring storing units are formed flatly without stripe-shaped unevenness 130 in the pulp-molded product 10.

Description

  The present invention relates to a pulp mold product in which a plurality of receiving recesses are provided, and adjacent receiving recesses are continuously provided via flat portions connected to respective openings, and a method for manufacturing the same. Specifically, the present invention relates to a pulp mold product in which streaky irregularities inevitably formed in a flat portion provided between adjacent housing recesses are eliminated, and a method for manufacturing the same.

  In a pulp molded product provided with a plurality of storage recesses for storing fruits or various articles, etc., and adjacent storage recesses are connected via flat portions connected to the respective openings, Streaky irregularities were inevitably formed.

  The reason is required for the structure of a molding die (papermaking die) for producing a pulp mold molded product in which irregularities such as a housing concave portion are formed and each part is formed into a thin plate shape.

  As illustrated in FIG. 4, the pulp mold product is sucked from the back side of the mold surface by immersing the mold 50-p (hereinafter, the suffix “-p” indicates a conventional one) in the pulp solution 801 in the tank 80. Then, after the pulp fibers are adhered to the entire area to a thickness of about 1 to 3 mm, the molding die 50-p is pulled up from the pulp solution 801 (arrow a), and the undried is adhered and formed on the entire molding surface. The product is received by the receiving mold 20 facing the mold surface (arrow b), and further transferred from the receiving mold 20 onto the pallet 861 of the conveying device 86 and sent to the dryer 88 (arrow c). It can be obtained by heating and drying at In the figure, 82 is a rotary mold support device, and 84 is a rotary receiving support device.

  Conventionally, as the mold 50-p, a mold body surface of a mold body such as aluminum is covered with a wire mesh. That is, an aluminum having a forming die surface for transfer-molding an uneven shape of a target pulp mold product, and a plurality of suction pores 310 (see FIG. 3) communicating from the forming die surface to the back side. Mold body 31-1, 31-2 and molding body 31-1, 31-2 so that pulp mud and fibers are not biased and adsorbed only near the suction pores 310. What has the metal mesh 32-1 and 32-2 which coat | covers a mold surface is used.

  However, when the mold surface is covered with a metal mesh, it is difficult to process and attach the metal meshes 32-1 and 32-2 with high dimensional accuracy according to the uneven shape of the mold surface, and not only skill is required, Even if it is an expert, there exists a problem that work requires a long time. This problem is pointed out in paragraphs 0004 to 0005 of Japanese Utility Model Laid-Open No. 6-79800 (Patent Document 1), for example. In addition, Patent Document 1 attempts to solve the problem by using a mesh body that is deformed by suction of pulp slurry and has a shape along the surface of the molding die. It is considered difficult to give rise to aging from the viewpoints of deterioration over time, suction time and pressure control, and the like.

  For this reason, conventionally, as illustrated in FIG. 3A, an aluminum mold body is divided into a plurality of small blocks (for example, small blocks 31-1, 31-2), and a wire mesh ( Example: 32-1, 32-2) are covered, and these are assembled as illustrated in FIG. 3B and fixed in the mold 35 to be integrated.

  However, in this method, the folded ends of the metal mesh (eg, 320-1 and 320-2) are closely connected at the boundary of each small block. Therefore, due to the nature of the metal mesh, the continuous portion becomes a completely flat surface. As a result, in the pulp mold product to which the boundary portion is transferred, a streak-like convex portion as shown by reference numeral “130” in FIG. 3C is inevitably generated, which is the object. There is a problem that not only the appearance of the pulp molded product is impaired, but also its strength is adversely affected.

6-79800

  According to the present invention, in a pulp mold product, a molding die having a shape that is difficult to cover the entire surface of the molding die with a single wire mesh is constituted by a single member that is not a combination of small blocks. The object is to eliminate streaky irregularities that have inevitably occurred in the part corresponding to the boundary of the small block. Moreover, it aims at providing the manufacturing method.

  The configuration of the present invention will be described in the following [1] to [3]. In this section ([Means for Solving the Problems]) and the next section ([Effects of the Invention]), reference numerals are given for ease of understanding, and the present invention is configured by reference numerals. It is not intended to be limited.

[1] Configuration 1
Each part 12, 13 has a thin plate shape, and has a plurality of storage units each including a storage recess 12 and a protruding portion 13 that protrudes around the opening of the storage recess 12, and is adjacent to each other. A pulp molded product 10 integrally formed so that the accommodation units are connected to each other at the edge of the overhang portion 13,
The pulp molded product 10 is characterized in that the continuous portion of the edge of the overhanging portion of the adjacent storage unit is formed flat without the streak-like irregularities 130.
The housing unit is a concept that virtually imagines a portion including the housing recess 12 and the overhanging portion 13 projecting around the opening, and there is no clear boundary between the housing units. That is, in contrast with the conventional product, this is a hypothetical definition in order to easily understand the units partitioned by the streaky protrusions 130 (see FIG. 1B) of the conventional product.

[2] Configuration 2
After the mold 50 is immersed in the pulp solution 801 and sucked through a large number of pores from the back side of the mold surface, the pulp fibers are adhered to the mold surface in layers, and then pulled up from the pulp solution 801, and the pulp fiber layer Is a method for producing a pulp mold product 10 in which each of the portions 12 and 13 is formed into a thin plate shape by transferring irregularities on the surface of the mold by releasing from the mold surface and drying.
The molding die 50 is provided with a molding die surface having a concave and convex shape for transferring a shape formed by connecting between openings of a plurality of receiving recesses through a flat projecting portion. A manufacturing method characterized by using a synthetic resin mold 50 formed to be porous by a hot melt lamination method so as to have a large number of pores leading from the surface to the back side.

[3] Configuration 3
The pulp manufactured by the manufacturing method of Claim 2 so that each site | part comprises a plate shape and has the overhang | projection part 13 without the flat streak unevenness 130 between each opening part of the some accommodating recessed part 12. FIG. Molded product 10.

Configuration 1 includes a plurality of storage units each including a housing recess 12 and a projecting portion 13 projecting around the opening of the housing recess 12. A pulp mold product 10 integrally formed so that mutually adjacent storage units are connected to each other at the end edge of the overhanging portion 13, Since the pulp molding product 10 is characterized in that the continuous portion is formed flat without the streak-like unevenness 130, the strength due to the streak-like unevenness conventionally formed at the boundary of each storage unit Can be avoided. Also, the appearance is good.
In Configuration 2, after the mold 50 is immersed in the pulp solution 801 and sucked through a large number of pores from the back side of the mold surface, the pulp fibers are adhered to the surface of the mold in a layered form, and then pulled up from the pulp solution 801. In this manufacturing method, the pulp fiber layer is released from the mold surface and dried to transfer the irregularities of the mold surface, and the parts 12 and 13 are formed into a thin plate shape. The molding die 50 includes a molding die surface having a concavo-convex shape for transferring a shape formed by connecting between openings of a plurality of receiving recesses through a flat projecting portion, Since the manufacturing method is characterized by using a synthetic resin molding die 50 formed to be porous by a hot melt lamination method so as to have a large number of pores extending from the molding die surface to the back side thereof, the constitution 1 Have good characteristics and outside It can also provide a method for producing a good pulp molded article.

(A) shows an example of the pulp molded product of embodiment, (b) shows an example of the conventional pulp molded product. (A) is explanatory drawing which shows the manufacturing method of the shaping | molding die used for manufacture of the pulp mold molded product of Fig.1 (a), (b) is FIG.1 (a) using the shaping | molding die manufactured with the manufacturing method of (a). ) Is a schematic cross-sectional view showing a state of manufacturing a pulp molded product, (c) is a schematic cross-sectional view of a pulp molded product manufactured by the manufacturing method of (b) (2C-2C in FIG. 1 (a)) Line cross section). It is explanatory drawing of the manufacturing method of the pulp mold molded product of FIG.1 (b), (a) is typical sectional drawing of the small block which comprises the conventional shaping | molding die, (b) is comprised by assembling several small blocks. FIG. 1B is a schematic cross-sectional view showing a state in which the pulp mold molded product of FIG. 1B is manufactured using the formed mold, and FIG. 5C is a schematic cross-sectional view of a pulp mold molded product manufactured by the manufacturing method of FIG. 3C-3C line cross section in FIG. Explanatory drawing which shows the manufacturing process of a pulp mold molded product.

An embodiment of the present invention will be described with reference to the drawings.
The example shown in FIG. 1 (a) is a pulp molded product in which four housing recesses 12, 12, are connected in series via flat overhanging portions 13 projecting around the respective openings. is there.
The present invention is not limited to the shape shown in the figure, and a pulp solution (pulp slurry) 801 is made with a paper making die (molding die) 50, adsorbed on the surface of the forming die, and released after being released from the mold. Any pulp molded article to be manufactured is applicable. In other words, although there are recesses and other irregularities for accommodating fruits, articles, etc., each part formed by making with a paper making mold (molding die) and adsorbing to the surface of the mold is a thin plate It is applicable to any molded product that satisfies the above.

  The pulp mold molded article shown in FIG. 1 (a) is manufactured using a porous resin mold 50 manufactured by the hot melt lamination method shown in FIG. 2 (a). In addition, as a manufacturing method for obtaining a pulp molded product, the method shown in FIG.

A method for producing a three-dimensional shape by the hot melt lamination method will be described.
The hot melt lamination method is a method in which the molten resin heated and discharged is discharged little by little from the tip of a thin nozzle, and the discharged molten resin is moved by moving the nozzle (or cradle) in the main scanning direction (X direction). When it is solidified while being placed in a line and reaches the end determined by the dimension of the target (the dimension in the main scanning direction at the layer and the position in the sub scanning direction), the nozzle (or cradle) is moved in the sub scanning direction (Y Direction) and then moving in the opposite direction (−X direction) along the main scanning direction. The sub-determination determined by the dimensions of the object (the layer and the dimension in the sub-scanning direction). The first layer is formed by repeating up to the scanning range. Next, the second layer is formed in the same manner with the direction crossing the main scanning direction of the first layer as the main scanning direction. This is a method for forming a target object by repeating such treatment to a range determined by the height of the target object.

  The mold 50 used in the embodiment of the present invention is formed by discharging molten resin from the head 60 through the nozzle 61 by the above-described hot melt lamination method. As the molten resin, for example, ABS (acrylonitrile-butadiene) -Styrene) resin or PC (polycarbonate) resin). Further, the main scanning direction of a certain layer (example: first layer) and the main scanning direction of a layer immediately above (example: second layer) are changed by 60 degrees, for example, and crossed.

  The diameter of the nozzle 61, that is, the diameter of the molten resin discharged from the nozzle 61 and the distance of the minute movement in the sub-scanning direction are determined over the desired period of use in consideration of the actual situation such as the use of the pulp molded product. It is set appropriately so as not to cause clogging, and to have a porous structure with good water permeability that discharges only water and hardly discharges pulp fibers.

  In addition, in FIG. 2B in which the cross section of the mold 50 is shown, the state of the porous density in the mold 50 is not shown, but this may be changed appropriately according to the site, Alternatively, a hollow portion may be provided. For example, in a part where the amount of drainage is desired to be increased, the sub-scanning interval (the above-mentioned predetermined minute distance) may be appropriately controlled, for example, wider than other parts. Alternatively, the nozzle diameter may be made variable so that the discharge amount is varied.

  As illustrated in FIG. 1A, the pulp mold product thus manufactured is unavoidable in the conventional molded product in the flat overhanging portion 13 interposed between the housing recesses 12 and 12. In addition to the streak-like convex portion (see FIG. 1B) seen in FIG. 1, not only the appearance is good, but also there is no problem in strength due to the streaky convex portion 130, and it has good characteristics.

10 10 m of pulp molded product according to the embodiment Molded product (during molding)
12 accommodation recessed part 13 overhang | projection part 10-p conventional pulp mold molded product 10m-p molded product (during molding)
12-p accommodation recessed part 13-p overhang part 130 streaky convex part 20 receiving mold 31-1, 31-2 mold body 310 pore 32-1, 32-2 wire mesh 320-1, 320-2 end of wire mesh 35 Form 50 50 Mold 50m Mold (During production)
50-p Conventional mold 60 Head 61 Nozzle 80 Pulp solution tank 801 Pulp solution 82 Rotary mold support device 84 Rotary receiver support device 86 Transport device 861 Pallet 88 Drying device

Claims (3)

Each portion has a thin plate shape, and has a plurality of storage units each including a storage recess and a protruding portion protruding around the opening of the storage recess, and the adjacent storage units are protruding portions. A pulp mold product integrally formed so as to be connected to each other at the edges of
A pulp molded product characterized in that the continuous portion of the edge of the overhanging portion of the adjacent accommodation unit is formed flat without streaks. After the mold is immersed in the pulp solution and sucked through a large number of pores from the back side of the mold surface, the pulp fibers are adhered to the surface of the mold in layers, and then pulled up from the pulp solution to form the pulp fiber layer. It is a production method for obtaining a pulp mold molded product in which each part is formed into a thin plate shape by transferring unevenness of the mold surface by releasing from the mold surface and drying,
The molding die surface is provided with a molding die surface having an uneven shape for transferring a shape formed by connecting between openings of a plurality of receiving recesses through a flat projecting portion. A manufacturing method using a molding die made of a synthetic resin formed to be porous by a hot-melt lamination method so as to have a large number of pores that lead to the back side thereof.   The pulp mold molded product manufactured by the manufacturing method of Claim 2 so that each site | part comprises a flat plate and it has a flat and stripe-shaped protrusion part without an unevenness | corrugation between each opening part of several accommodating recessed parts. .

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