JP3071786B1 - Wet papermaking mold - Google Patents

Abstract

[Problem] Since a large amount of labor and time are required for a drilling operation in a mold, the production cost of the mold is significantly increased, and the production cost of the pulp molded product is increased. SOLUTION: A mold M is formed of a base material 1 having a communication hole 2 communicating from a suction side F to a suction side G of pulp fiber,
The suction surface side F of the base material 1 is processed into the surface shape of the pulp molded product, and the papermaking net 4 is provided on the suction surface side F of the base material 1, thereby eliminating the need for punching and making the mold necessary. It saves time and labor and greatly reduces the cost of manufacturing papermaking dies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet papermaking mold ("female mold" in this specification) for producing a packaging material (pulp mold) from a pulp material such as waste paper pulp or virgin pulp by a wet papermaking method. ).

[0002]

2. Description of the Related Art Conventionally, plastic has been used as a rug for eggs and fruits and vegetables, and Styrofoam has been used as a packing material for electric products and precision equipment. However, these have problems such as the occurrence of air pollution at the time of disposal, and in recent years, pulp molded products using pulp materials have been used. Further, this pulp molded product is also effective as a means for recycling waste paper, and it is expected that the pulp molded product will be effectively reused in industry.

As shown in FIGS. 8 (a) and 8 (b), a manufacturing apparatus for such a pulp mold product is shown in FIGS. 8 (a) and 8 (b). (Also referred to as a "mold"), and pulp fibers are adhered to the surface of the wire mesh 53 on the lower surface by vacuum suction from the rotary joint 52 side (a). It is known that a pulp molded product is obtained by sucking at 54 and transporting it to a drier to dry it (b).

FIGS. 9A and 9B are drawings showing such a wet papermaking mold, wherein FIG. 9A is a longitudinal sectional view and FIG. As such a papermaking mold 51, a communication hole 5 is drilled on each of the aluminum plate and the pulp fiber adsorption surface side of the aluminum casting by a drill.
There is known a method of forming a mold by opening 5 and combining them. The communication hole 55 provided in the mold 51 is provided on the entire surface as shown in FIG. 9 (b).

[0005] Japanese Patent Application Laid-Open No. 7-42 discloses this type of prior art.
Although there is an invention described in Japanese Patent Publication No. 100, this invention is designed to exhaust steam during heating and drying through a multi-hole mold in order to shorten the drying time of a pulp mold product and prevent distortion during drying. It does not facilitate the manufacture of the mold as in the present invention.

[0006]

However, in the case of the above-mentioned prior art, the communication holes 55 provided in the mold are formed, for example, with holes having a diameter of 3 mm at a pitch of about 10 mm over the entire surface. It takes a lot of effort and time to open many. And this work is usually
Since it is a manual operation, it costs a lot of money.

[0007] Therefore, the production cost of the mold requiring such labor and time increases the overall cost of the wet papermaking equipment, and as a result, the production cost of the mold significantly increases the production cost of the pulp molded product. , Has hindered its spread.

Further, when such a pulp molded product is used as a cushioning packaging material, some of the packaging products have a short life cycle or are produced in small quantities. If this is attempted, the mold cost may occupy several tens of percent of the manufacturing cost, and the manufacturing cost of the pulp molded product is often unfit for profit and cannot be used.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method of sucking pulp liquid from a plurality of communication holes provided in a mold, and using a mesh provided on the surface of the mold to remove pulp fibers. A wet papermaking mold for making paper, comprising:
The base material is constituted by a honeycomb material having a communication hole communicating from the suction side of the pulp fiber to the suction side, and the suction side of the base material is processed into a surface shape of a pulp molded product,
A papermaking net is provided on the adsorption surface. As described above, since the suction surface side is processed by using the base material having the communication hole in advance, the drilling process is not required, so that the time and labor required for manufacturing the mold can be significantly reduced. The manufacturing cost of the papermaking mold can be significantly reduced. Also said mother
Made of honeycomb material that communicates from the suction side to the suction side.
The use of honeycomb materials that are relatively easy to obtain
In addition, since a papermaking mold can be manufactured at a low cost, the mold can be manufactured according to the life cycle of the packaged product, and the recycling of used paper can be promoted.

[0010]

Further, the base material of the mold, constituted by a pipe member juxtaposed a plurality of pipes having a communication hole which communicates from the suction surface side of the pulp fibers to the suction side, Pal adsorption surface side of the base material
Process into the surface shape of the mold
Even if a papermaking net is provided , a papermaking mold can be manufactured at low cost using easily available pipe material.

[0012] Further, the opening of the communication hole is approximately 5 mm to 1 mm.
When it is formed with a thickness of 0 mm, it is relatively easy to process the suction surface of the mold, and the papermaking net can be stably held.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial perspective view showing a material before processing a wet papermaking mold according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing a part of a wet papermaking mold processed from the same material. FIG. 3 is a perspective view showing a part of a wet papermaking mold in a state where a papermaking net is provided on the suction surface of the mold of FIG.
FIG. 4 is an overall drawing of the wet papermaking mold shown in FIG.
(a) is a longitudinal cross-sectional view, and (b) is a view as viewed from an arrow A.

As shown in FIG. 1, in the first embodiment, a honeycomb material having a communication hole 2 communicating vertically in the drawing is used as a base material 1 to be processed as a wet papermaking mold. A base material 1 having a height capable of processing a mold shape in a thickness t direction is used. As the communication hole 2 of the honeycomb material, for example, a hole formed in a honeycomb shape having an opening dimension v of about 3 mm to 12 mm is used. As the opening dimension v, a honeycomb shape of about 5 mm to 10 mm is preferable because the processing is easy and the holding of the papermaking net 4 described later is stable.

As a method of processing the base material 1 in the thickness t direction, for example, if an NC (numerical control) machine tool is used, the surface thereof can be easily processed even with a complicated suction surface shape. For example, as shown in FIG. 2, it is processed in accordance with the surface shape of a pulp molded article having an inclined surface 3 or the like. In addition, you may process using another apparatus.

As shown in FIG. 3, if a papermaking net 4 (for example, a wire mesh) is provided on the suction surface side F (the upper surface in this figure) of the processed base material 1, the wet papermaking mold M can be formed. The suction surface side is completed. As the papermaking net 4, a conventionally used mesh opening is used. In addition, as a method of providing the papermaking net 4, if the surface of the mold M is divided into a plurality of blocks according to the shape and the papermaking nets 4 having the size of each of the blocked areas are provided, the efficiency of the mounting operation can be increased. Can be planned.

Thereafter, as shown in FIG. 4 (a), the suction surface 5 is integrated with the suction port 5 of the suction side G so that the suction surface F faces downward. A papermaking mold M formed in a desired shape and having a communication hole 2 communicating from the suction surface side F in the thickness direction of the base material 1 is completed. This mold M
According to the method, the pulp liquid is sucked through the communication hole 2 through the papermaking net 4 by sucking from the upper suction side G. 4 (b) is a drawing showing the surface of the honeycomb material excluding the papermaking net 4. FIG.

Since the papermaking mold M thus formed does not require a perforating process at the stage of manufacturing the mold, the manufacturing cost can be greatly reduced. In addition, the mold M can be formed by connecting a block-shaped honeycomb material having the papermaking net 4 provided on the suction surface side F to the suction port 5, so that the mold M can be formed.
Also in this respect, the mold manufacturing cost can be reduced.

The wet papermaking mold M constructed as described above.
According to FIG. 8, similar to FIGS. 8 (a) and 8 (b) described above, a certain concentration (for example, cardboard or newspaper) obtained by disintegrating used paper into water.
(About 1 to 2%) of the pulp solution, and the suction side G of the mold M is inserted through a rotary joint (FIG. 8).
Is evacuated so that the pulp fibers in the pulp solution are vacuum-adsorbed and laminated on the papermaking net 4 on the adsorption surface F of the mold M. Then, a certain thickness (for example, 2
When the pulp fiber (about mm) is secured, the mold M is taken out of the pulp solution to separate a molded product made of the pulp fiber. Thereafter, the molded product is dried to secure the strength, whereby a pulp molded product can be obtained.

FIG. 5 is a partial perspective view showing a material before processing of a wet papermaking mold according to a second embodiment of the present invention, and FIG. 6 is a part of a wet papermaking mold obtained by processing the same material. FIG. 7 is a perspective view showing a part of a wet papermaking mold in which a papermaking net is provided on the suction surface of the mold shown in FIG.

As shown in FIG. 5, in the second embodiment, a pipe material having communication holes 7 communicating with both ends is used for a base material 6 to be processed as a wet papermaking mold, and has a thickness t direction. A base material 6 in which pipe materials having a height capable of processing a mold shape are juxtaposed is used. As the communication hole 7 of this pipe material, for example, the diameter w is 3 mm to 12 mm.
Some are used.

As a method of processing the base material 6 in the thickness direction, if an NC machine tool is used as in the first embodiment, even if the die has a complicated suction surface shape, the surface thereof can be easily formed. Can be processed. Also in this case, even the inclined surface 8 as shown in FIG. 6 or another surface shape can be easily processed. Then, as shown in FIG. 7, if a papermaking net 9 is provided on the suction surface side F of the processed base material 6, the suction surface side of the wet papermaking mold is completed. Similarly to the first embodiment described above, the method for providing the papermaking net 9 may be such that the suction surface side F surface of the base material 6 is divided into a plurality of blocks according to the shape, and the papermaking net 9 is provided for each of the blocked areas. Thus, the efficiency of the mounting operation can be improved.

The wet papermaking mold thus formed (having the same form as the mold M shown in FIG. 4A but having a different shape of the communication hole 2) is also used in the above-described FIG. 8A. Similarly to (b), a papermaking mold is placed in a pulp solution of a certain concentration obtained by disintegrating waste paper such as cardboard or newspaper into water, and the suction side G of the mold is evacuated to remove the pulp in the pulp solution. The fibers are stacked by vacuum suction on the suction surface side F of the mold. Then, when a pulp fiber of a certain thickness is secured, the mold is taken out of the pulp solution, a molded product composed of pulp fibers is separated, and the molded product is dried to obtain a pulp molded product by securing strength. it can.

As described above, the wet papermaking mold M used in the wet papermaking method is preliminarily provided with the base material 1 having the communication holes 2 and 7 in advance.
6 makes it possible to manufacture the papermaking mold M at a low cost without requiring labor and time for perforation, and thereby the pulp mold manufactured by the wet papermaking method. The manufacturing cost of the product can be reduced.

In each of the above-described embodiments, a part of the mold including the inclined surfaces 3 and 8 and the flat surface is illustrated and described. However, the wet papermaking mold having a cubic curved surface is used. Can be easily manufactured, and even a mold having a complicated suction surface shape can be manufactured at low cost, so that the manufacturing costs of various pulp molded products can be reduced. The form of the suction surface side F of the papermaking mold M is appropriately processed by an NC machine or the like according to the use of the pulp molded product.

[0026]

The above-described embodiment is one embodiment, and various changes can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

[0028]

The present invention is embodied in the form described above and has the following effects.

Since the surface is preliminarily processed using a base material having a communication hole, the time and labor required for manufacturing a wet papermaking mold can be greatly reduced, and the wet papermaking mold can be manufactured. Costs can be significantly reduced. Also,
Thus, by reducing the manufacturing cost of the wet papermaking mold, it is possible to promote the recycling of the used paper.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a raw material before processing of a wet papermaking mold according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a part of a wet papermaking mold obtained by processing the material shown in FIG.

3 is a perspective view showing a part of a wet papermaking mold in a state where a papermaking net is provided on an adsorption surface of the mold shown in FIG. 2;

4 is an overall drawing of the wet papermaking mold shown in FIG. 3,
(a) is a longitudinal cross-sectional view, and (b) is a view as viewed from an arrow A.

FIG. 5 is a partial perspective view showing a raw material before processing of a wet papermaking mold according to a second embodiment of the present invention.

6 is a perspective view showing a part of a wet papermaking mold obtained by processing the material shown in FIG. 5;

7 is a perspective view showing a part of a wet papermaking mold in a state where a papermaking net is provided on an adsorption surface of the mold shown in FIG. 6;

FIGS. 8A and 8B are schematic views showing steps of a conventional wet papermaking method.

FIG. 9 is a drawing showing a conventional wet papermaking mold, and FIG.
Is a longitudinal sectional view, and (b) is a view as seen from the arrow B.

[Explanation of symbols]

 1,6: Base material 2,7 ... Communication hole 3,8 ... Slope surface 4,9 ... Paper making net 5 ... Suction port v ... Opening dimension w ... Diameter F ... Suction surface side G ... Suction side M ... Wet papermaking gold Type

Continuation of the front page (56) References JP-A-8-92899 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D21J 3/00-7/00

Claims (3)

(57) [Claims] 1. A wet papermaking mold for sucking pulp liquid from a plurality of communication holes provided in a mold and for making pulp fibers by a net provided on the surface of the mold, wherein the base material of the mold is provided. Is composed of a honeycomb material having a communication hole communicating from the suction side of the pulp fiber to the suction side, and the suction side of the base material is processed into the surface shape of the pulp molded article, and a papermaking net is formed on the suction side. A wet papermaking mold characterized by being provided. 2. A wet papermaking mold for sucking pulp liquid from a plurality of communication holes provided in a mold and making pulp fibers by a net provided on the surface of the mold, wherein the base material of the mold is provided. With a plurality of pipes having communication holes communicating from the pulp fiber suction surface side to the suction side.
1. A wet papermaking mold comprising: a pulp material, wherein a suction surface side of the base material is processed into a surface shape of a pulp molded product, and a papermaking net is provided on the suction surface. 3. An opening of the communication hole is approximately 5 mm to 10 mm.
3. The wet papermaking mold according to claim 1, wherein the mold is formed by the following.