JPH01272727A - Rubber press forming apparatus for cylindrical fiber forming body - Google Patents

Abstract

PURPOSE:To facilitate fitting/removing of a supporting body to/from a back-up cylinder by arranging the permeable back-up cylinder energized to upper part in inner part of a rubber cylinder and being possible to draw down and fitting a cylindrical supporting body to out of the back-up cylinder. CONSTITUTION:In a rubber press forming apparatus, the permeable back-up cylinder 13 is arranged at the inner part of the rubber cylinder 5. A piston rod 18 for a cylinder unit 17 arranged at lower face of bottom plate 2 is connected with the bottom part of the back-up cylinder 13 and energized to upper part with a spring 19. Then, the working oil, etc., is supplied into an upper chamber of the piston and the back-up cylinder 13 is forcedly drawn down against the spring 19. The permeable cylindrical supporting body 31 sticking to the fiber forming body raw material 30 on the outer circumferential face thereof is fitted and rubber-pressed on the outer periphery of the back-up cylinder 13. The back-up cylinder 13 can be gotten away against the spring 19 to lower part and the supporting body 31 caused by catching in the back-up cylinder is not broken.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rubber press molding apparatus for molding a cylindrical fiber molded body used for manufacturing fiber reinforced metal (FRM) and the like.

(Prior Art) In order to manufacture fiber-reinforced metals, conventionally, a fiber molded body is impregnated with molten metal.

As a method for molding the above-mentioned fiber molded article, Japanese Patent Application Laid-Open No. 62
The one disclosed in No.-170441 is known.

In this method, shell sand is solidified to create a collapsible air-permeable cylindrical support (molding mold), and this cylindrical support is held in a holder and immersed in an aqueous solution containing reinforcing fibers and a binder. A molding material made of reinforcing fibers and a binder is adhered to the surface of the support in a layered manner by suctioning the solution from inside the support, and then a certain amount of water in the molding material is removed using a rubber press molding device to increase the density. After increasing the temperature, the fiber molded article is obtained by drying and firing and collapsing the support.

Here, the structure of the rubber press molding apparatus is as shown in FIG. By supplying liquid or gas to the pressure chamber 103 filled with pressure, the molding material 104 attached to the outside of the support 101 is pressed by the rubber tube 100.

(Problems to be Solved by the Invention) In the above-described conventional rubber press molding apparatus, when the fiber molded body is strongly pressed to increase the density, the cylindrical support may be damaged. Therefore, it is possible to attach a back-up material made of punching metal or the like to the inside of the support from the beginning, but in this way, when the fiber solution is sucked and the fibers are attached to the support surface, it is possible to partially attach the fibers to the support surface. The adhesion thickness varies, making it impossible to obtain a fiber molded product with a uniform thickness.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an air vent that is biased upwardly by a spring or the like and can be pulled downwardly inside the rubber cylinder of a rubber press molding device. A cylindrical backup tube was provided, and the cylindrical support was fitted onto the backup tube.

(Function) During pressing, the inside of the cylindrical support is supported by the backup cylinder, so even if the press pressure is increased, the support will not collapse, and the backup cylinder is urged upward and downward. Since it is movable, the support can be easily attached to and removed from the backup tube.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a sectional view of a rubber press molding device according to the present invention;
Fig. 2 is an enlarged sectional view showing the state of the rubber press molding machine before pressing, Fig. 3 is an enlarged sectional view showing the state of the rubber press forming machine during pressing, and Fig. 4 is the pre-process of the rubber press. It is an expanded sectional view of the suction device used.

In the rubber press molding apparatus, a cylindrical case 3 is set between a top plate 1 and a bottom plate 2, and the top plate 1 and the bottom plate 2 are tightened with bolts 4 to form an outer part.

The upper and lower ends of the rubber tube 5 are sandwiched between the cylindrical case 3, the top plate 1, and the bottom plate 2, and a pressure chamber S is defined between the outside of the rubber tube 5 and the inside of the case 3. A water supply tank 6 is connected with a pipe 7, and water is sent into the pressure chamber S by the operation of a cylinder unit 8, and a manual valve 9 for air bleeding is attached to the case 3.

In addition, an opening 10 is formed in the center of the top plate 1, and this frontage 1
A cover plate 12 that moves up and down using the cylinder unit 11.
Furthermore, inside the rubber tube 5, there is a breathable backup tube 13 made of porous ceramics or the like.
are placed.

The lower part of the backup cylinder 13 is slidably inserted into the recess 14 formed in the bottom plate 2, and the inner side of the backup cylinder 13 is connected to the suction device 16 through the hole 15 and the recess 14 formed in the bottom of the backup cylinder 13. linked.

Further, a piston rod 18 of a cylinder unit 17 provided on the lower surface of the bottom plate 2 is connected to the bottom of the backup cylinder 13.
The piston rod 18 is urged upward by a spring 19 disposed inside the cylinder, and hydraulic oil is supplied to the upper chamber 20 of the piston to forcibly pull down the backup cylinder 13 against the spring 19. I have to.

By the way, in order to press using the above-mentioned rubber press molding apparatus, an air permeable cylindrical support 3 made of shell sand with a molded body material 30 attached to the outer circumferential surface of the backup cylinder 13 is used.
1, the pre-process of attaching the molded body material 30 to the outer peripheral surface of the cylindrical support 31 will be explained based on FIG.

To attach the molded body material 30, the cylindrical support 31 is impregnated in an aqueous solution 33 containing reinforcing fibers and a binder while being held in a holding jig 32, and the aqueous solution 33 is applied through a suction pipe 34. By passing from the outside to the inside of the support 31, the molded body material 30 made of reinforcing mm and a binder is adhered to the surface of the support 31.

Here, the holding jig 32 consists of an upper holder 35 and a lower holder 36, and the upper holder 35 extends a cylindrical portion 38 upward from the center of the flange portion receiving portion 37, and is attached upwardly within this cylindrical portion 38 by a spring 39. A cylindrical body 40 that is biased is inserted, a Mi street piece 42 that is biased downward by a spring 41 is provided inside this cylindrical body 40, and the cylindrical body 40 is
A hole 44 for accommodating a locking steel ball 43 is formed on the side surface of the housing. Further, the lower holder 36 extends a cylindrical part 46 in which a suction hole is formed from the center of the flange-shaped receiving part 45, and the upper end of this cylindrical part 46 is attached to the upper holder 35.
A pin portion 47 is inserted into the cylindrical body 40 from below, and a groove portion 48 into which the steel ball 43 fits is formed on the outer periphery of the pin portion 47. The state shown in FIG. 4 shows a locked state in which escape of the steel ball 43 to the outside is restricted. To release the locked state, push down the cylindrical body 40 and push the steel ball 43 into the receiving part 37. This is done by positioning it in the central system recess 37a.

As described above, the molded body material 30 is attached to the outer periphery of the cylindrical support 31.
Once attached, remove the cylindrical support 3 from the holding jig 32.
1 and open the opening 10 in the top plate 1 of the rubber press molding device.
Open it, insert the cylindrical support 31 into the device through this opening 10, and back it up.

The cylindrical support 31 is attached to the tube 13. At this time, since the backup cylinder 13 can escape downward against the spring 19, the support body 31 will not be caught by the backup cylinder 13 and damaged.

After that, the cylinder unit 11 lowers M12 to close the opening 10, and the cylinder 8 closes the pressure chamber S.
Water is pumped inside. Then, as shown in FIG. 3, the rubber cylinder 5 swells inward, and the molded body material 30 is compressed between the rubber cylinder 5 and the cylindrical support 31. As a result, excess water in the molded body material 30 passes through the cylindrical support 31 and the backup cylinder 13 and is removed by the suction device 16, and the molded body material 30 is shaped and increases in density.

Next, the support body 31 is removed from the backup cylinder 13, but in this case, by slightly pulling down the backup cylinder 13 by operating the cylinder unit 170, it can be easily done by grasping the trigger.

Thereafter, the molded body material 30 is heated and dried and fired to collapse the support body 31, thereby obtaining a cylindrical fiber molded body.

(Effects of the Invention) As explained above, according to the present invention, since a breathable backup cylinder is provided inside the rubber cylinder of the rubber press molding device, the support made of shell sand is damaged during press molding. In particular, since the backup cylinder is biased upward by a spring or the like and pulled downward by a cylinder unit, etc., the support body can be smoothly inserted into the backup cylinder, and the backup cylinder It is also easy to remove the support from the base.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a rubber press molding apparatus according to the present invention;
Fig. 2 is an enlarged sectional view showing the state of the same rubber press molding machine before pressing, Fig. 3 is an enlarged sectional view showing the state of the same rubber press forming machine during pressing, and Fig. 4 shows the pre-process of the rubber press. The sectional view shown in FIG. 5 is a sectional view of a conventional rubber press molding apparatus. In addition, in the drawing, 3 is a case, 5 is a rubber tube, 12 is a lid plate,
13 is a backup cylinder, 19 is a spring, 30 is a molded body material, 31 is a cylindrical support, and S is a pressure chamber. Patent applicant: Agent for Honda Motor Co., Ltd.
Patent Attorney Part 2 1) Yong-Immediate Question Patent Attorney
Kuni Ohashi, Patent Attorney, Small
Yama Yu Figure 2 Figure 3

Claims (1)

[Claims] In a rubber press molding device that presses a molded body material attached to the outer circumferential surface of an air-permeable cylindrical support from the outside with a rubber cylinder, an air vent is provided inside the rubber cylinder to extend the air-permeable cylindrical support. 1. A rubber press molding apparatus for a cylindrical fiber molded article, characterized in that a backup cylinder is provided, the backup cylinder is urged upward by an elastic member and can be pulled down by a cylinder unit or the like.