JP2019018520A - Manufacturing apparatus of resin gear paper-making element body - Google Patents

Abstract

To solve the problem of the conventional paper-making apparatus in which: any dehydration mechanism, by vacuum sucking or by gravity of a slurry dispersed liquid, is aimed at drainage assistance only from the bottom, making it difficult to achieve the reduction of dehydration time.SOLUTION: A manufacturing apparatus of resin gear paper-making element body constituted with a slurry tank, an opening/closing valve, a mold (an upper mold), a mold (a lower mold) and a bottom member, and for molding an element body from a slurry containing a fiber in water medium, has a vacuum dehydration mechanism at the bottom of the mold (the lower mold) and is provided with a pressurizing mechanism in the mold (the upper mold).SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus for producing a resin gear papermaking body. More specifically, the present invention relates to an apparatus for manufacturing a papermaking body having a mechanism capable of depressurizing a mold with a vacuum dehydrating mechanism and pressurizing the mold with a pressurizing mechanism.

A resin rotating body using a reinforcing fiber base is used as a gear used for vehicles and the like. The reinforcing fiber base material is produced by dispersing fibers in a medium such as water to form a slurry, enclosing the slurry dispersion in a mold and making paper.
In order to improve the operating rate of the manufacturing apparatus, it is desired to shorten the cycle time. In order to shorten the manufacturing cycle time, it is necessary to shorten the time (dehydration time) required to separate the dispersoid and the dispersion medium in the slurry dispersion.

A conventional papermaking apparatus has a lower compression mold having a vacuum suction pipe on the upper surface of a pedestal for supporting the whole papermaking compressor, and a discharge port for liquid in the slurry is provided on the upper surface. Further, it is possible to shorten the paper making time by connecting a vacuum suction pump to the discharge port (see Patent Document 1).
In addition, there is a method in which paper making and dewatering press are performed after a draining process of a slurry dispersion using a dispersion nozzle and paper making net (see Patent Document 2).

JP 2012-979 A JP 2001-123386 A

However, the above-described dewatering mechanism of the conventional papermaking apparatus is based on vacuum suction or due to the weight of the slurry dispersion. Each mechanism is intended to assist drainage only from the bottom, and it has been difficult to reduce the dehydration time.
The present invention is intended to solve the above-described problems, and an object of the present invention is to provide an apparatus for manufacturing a resin gear papermaking body capable of shortening the dewatering time.

The present invention is [1] Resin gear paper making comprising a slurry tank, an on-off valve, a mold (upper mold), a mold (lower mold) and a bottom member, and forming a shaped body from a slurry containing fibers in an aqueous medium. An apparatus for manufacturing a molded body, which has a vacuum dehydration mechanism at the bottom of a mold (lower mold) and a pressure gear mechanism on the mold (upper mold), and provides a manufacturing apparatus for a resin gear papermaking molded body It is.
In addition, [2] the apparatus for producing a resin gear papermaking body according to [1], wherein the pressurizing mechanism includes a gas supply device.

  According to the manufacturing apparatus of the present invention, the slurry dispersion is pushed out to the mold (lower mold) through the bottom member (metal mesh) by the pressurization of the pressurizing mechanism provided in the mold (upper mold) as the dehydrating mechanism. The vacuum dehydration mechanism is provided at the bottom of the mold (lower mold). With these configurations, the dewatering time of the papermaking body can be shortened.

It is a schematic diagram which shows the manufacturing apparatus of the resin gear-making body shape of this invention. It is a schematic diagram which shows the manufacturing apparatus of the resin-gear papermaking body shape explaining an Example.

  The production apparatus of the present invention includes a vacuum dehydration mechanism that performs vacuum suction on the bottom of a mold (lower mold) 7 as a mechanism (dehydration mechanism) for removing the dispersion medium in the slurry dispersion, and a mold (upper mold). ) 2 has a pressurizing mechanism (gas injection pipe 3). Hereinafter, each structure is demonstrated in order.

  The pressurizing mechanism provided in the mold (upper mold) pushes (pressurizes) the slurry dispersion 9 introduced into the mold from the top, thereby allowing the dispersion medium (aqueous medium) and dispersoid in the slurry to pass through the bottom member. (Fiber) separation is promoted, and the dehydration time can be shortened. The position of the gas injection pipe connected to the pressurizing mechanism is not limited to the inside of the mold, and may be in a slurry pipe outside the mold.

  The pressurizing mechanism provided in the mold (upper mold) performs pressurization by injecting gas into the mold. Examples of the gas include air and nitrogen, but it is preferable to use air from the viewpoint of availability, safety, and water insolubility.

  When the pressurizing pressure of the pressurizing mechanism is 0.1 to 1 MPa, it is excellent in terms of the effect of shortening the dehydration time. More preferably, it is 0.3-0.5 MPa. Increasing the pressure improves the dehydration time shortening effect, but 0.3 MPa is particularly preferable from the viewpoint of safety and protection of the bottom member.

The vacuum dewatering mechanism performs vacuum suction and dewatering of the slurry dispersion by connecting a vacuum suction pump to the pipe 5 inside the lower compression mold. The slurry introduced from the slurry tank 1 into the mold (lower mold) is vacuum-sucked from the lower part through the bottom member 4 to promote separation of water (medium) and fibers (dispersoid).
With the above configuration, the dewatering time of the papermaking body can be shortened by the resin gear papermaking body manufacturing apparatus.

Hereinafter, the present invention will be described in more detail with reference to examples.
In the preparation of the slurry dispersion, the fibers were 13.0 g of Teijin's Technora ("Technola" is a registered trademark), 11.6 g of Texin's Conex ("Conex" is a registered trademark), Toray Industries, Inc. 1.6 g of Kevlar pulp ("Kevlar" is a registered trademark) manufactured by DuPont Co., Ltd. was charged into the tank. Then, water was added and stirred to disperse the fiber so that the dispersion concentration was 4 g / liter. Furthermore, the powder which mixed 44.21g of powdery phenol powder, the carbon black powder for coloring 0.53g, and the powder mold release agent 0.45g was added in the tank, and what was stirred was used as the slurry dispersion liquid.

As shown in FIG. 2 (A), the machined body manufacturing apparatus has an acrylic cylinder 10 placed on a cylindrical mold 7 and is in close contact with the upper mold 2 so that the slurry dispersion and gas do not leak. I let you. The acrylic cylinder has an inner diameter of 90 mm and a height of 212 mm, and since it is transparent, the internal slurry state is visible.
The bottom member 4 installed on the upper part of the lower compression mold 6 was used by superposing # 50 plain woven SUS mesh and SUS punching metal having a diameter of 3 mm, a pitch of 4 and a thickness of 3 mm.

  The prepared slurry dispersion was put into the slurry tank 1 at the upper part of the mold, and 9.9 g of a solution obtained by diluting 10 times of the ceramics made by Meisei Chemical Co., Ltd. 19.8 g of a 20-fold diluted solution was added and stirred. Thereafter, the ball valve 8 was opened to fill the slurry dispersion into the mold (FIG. 2B), and vacuum dehydration was performed from a vacuum pump connected to a pipe (vacuum suction pipe 5) at the lower part of the mold. Thereafter, the ball valve 8 was closed to make the slurry hermetically sealed, and air was injected from the upper pipe 2 (gas injection pipe 3) at a pressure of 0.3 MPa. As shown in FIG. 2C, when the slurry was dewatered, the time until moisture was removed from the surface of the slurry inside the acrylic cylinder was visually confirmed, and the time from the start of the slurry dropping to the completion of dewatering was measured.

Table 1 shows the measurement results of the dehydration time.
In the conventional method, which does not perform air injection, that is, does not perform pressurization, it takes about 28 seconds to complete dehydration. On the other hand, when air was injected, that is, when pressure was applied, dehydration could be completed in 22 seconds, and the time could be shortened by about 6 seconds.

  As described above in detail, according to the apparatus for producing a resin gear papermaking body according to the present invention, the slurry dispersion can be dehydrated by gas injection (pressurization) from the pressurization mechanism provided in the mold (upper mold). The cycle time during manufacture can be shortened.

1. Slurry tank 2. Mold (upper mold) 3. Gas injection pipe 4. Bottom member Vacuum suction piping 6. Lower compression type Cylindrical mold
8). Ball valve 9. Slurry dispersion 10. Acrylic tube

Claims (2)

A device for producing a resin gear-making element body comprising a slurry tank, an on-off valve, a mold (upper mold), a mold (lower mold), and a bottom member, and forming a molded body from a slurry containing fibers in an aqueous medium. And
An apparatus for producing a resin gear making body having a vacuum dehydration mechanism at the bottom of a mold (lower mold) and a pressurizing mechanism in the mold (upper mold). The apparatus for producing a resin gear papermaking body according to claim 1, wherein the pressurizing mechanism is a gas pressurizing mechanism having a gas supply device.

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