JPH0731912Y2 - Powder filling equipment for rubber press - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention applies powder to a rubber press (cold isostatic press: CI
The present invention relates to a rubber press powder filling device for uniformly filling a molding powder with a molding powder in a step of molding using P).

[Prior Art] A rubber press is widely used as a device for molding various powders into a molded product having an isotropic structure. For example, in the case of producing an isotropic carbon material, secondary particles obtained by finely pulverizing a kneaded product of coke powder and a binder are filled in a rubber case and molded by applying hydrostatic pressure with a rubber press, and then a molded body is formed. The method of firing carbonization is adopted, and since a highly isotropic and dense structure is obtained by this method, structural materials for nuclear reactor, electrodes for electric discharge machining, heaters for pulling semiconductor single crystals, It is useful for manufacturing various parts such as crucibles.

In the molding means using such a rubber press,
It is known that whether or not the powder is filled in the rubber case has a great influence on the properties of the molded product, and when the filling is inhomogeneous, it becomes a factor that causes frequent deformation and cracks.

Conventionally, as means for uniformly filling the rubber case with the molding powder, a method of granulating the powder in advance, a method of artificially impacting the rubber case, and a large number of projecting rods on the supporting member A method of filling while oscillating by using a device in which ribs arranged in a row are fixed in a spider web shape (Shokaisho 62-60501)
Gazette) is applied.

[Problems to be solved by the device]

However, in the above-mentioned conventional methods or devices, there are problems that uniform filling organization is insufficient and that it takes a long time.

An object of the present invention is to provide a powder filling device for a rubber press, which solves these problems and can perform homogeneous powder filling in a short time.

[Means for Solving the Problems]

A powder filling device for a rubber press according to the present invention for achieving the above object is a device for uniformly filling a rubber case for a rubber press from above with a molding powder through a hopper. A structural feature is a structure including a metal frame for storing and setting the above-mentioned metal frame, and a vibration motor of a mechanism which is arranged at a position opposite to the metal frame and vertically moves while abutting the peripheral surface of the metal frame.

[Action]

According to this invention, in the process of gradually dropping and filling the molding powder from the hopper into the rubber case set inside the metal frame,
Depending on the filling level, the position of the vibration motor that comes into contact with the opposite side surfaces of the metal frame can be appropriately moved up and down, so that the filling powder is uniformly vibrated in the rubber case, and is always biased within a short time. No homogeneous filling structure is formed.

Due to such an action, the occurrence of deformation and cracks in the rubber press molding stage is effectively eliminated.

〔Example〕

Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a sectional view showing an embodiment of a powder filling device for a rubber press according to the present invention, 1 is a rubber case, 2 is a metal frame, and 3 is a vibration motor. The metal frame 2 for storing and setting the rubber case 1 has an appropriate shape such as a cylinder or a square tube following the shape of the rubber case 1, and is configured as a bottomed container by a hard metal such as steel. .
Two to four vibration motors 3 are fixed to columns 4 arranged around the metal frame 2 so as to be located on opposite sides of the metal frame 2. For example, a hydraulic cylinder 5 or other appropriate contact / release mechanism may be provided. Is installed through.

The metal frame 2 is placed on a lifter 6 that automatically moves up and down. It is preferable that the lifter 6 is designed so as to descend in association with the falling speed of the molding powder.

FIG. 2 is a cross-sectional view showing another embodiment. In this case, a cylindrical metal frame 2 is placed on a turntable 7, a vibration motor 3 is fixed, and a column 4 is molded powder. It is a mechanism that moves up and down by hydraulic means or the like in conjunction with the body falling speed. In this case, the vibration motor 3 may be vertically moved along the support column 4, or the vibration motor 3 may be fixed to the support column 4 and the turntable 7 may be vertically moved.

In using the powder filling device for a rubber press having the above structure, first, the rubber case 1 is set in the metal frame 2 and placed on the lifter 6 (FIG. 1) or the turntable 7, and the vibration motor 3 Is brought into contact with the lower side surface of the metal frame 2 so as to face it. In this state, the vibration motor 3 is driven while dropping the molding powder 8 from a hopper (not shown).
As the molding powder 8 collects in the rubber case 1, the vibration motor 3 is gradually moved upward while continuously vibrating. The movement of the vibration motor 3 is carried out by lowering the lifter 6 in the case of the embodiment shown in FIG. 1, and is carried out by raising the column 4 in the embodiment shown in FIG. Since the vibration motor 3 is rotated by the action, the vibration motor 3 substantially rises while rotating on the peripheral surface of the metal frame 2.

[Effect of device]

According to the powder filling device for a rubber press of the present invention, the vibration position from the side surface of the metal frame can be appropriately moved according to the filling level of the molding powder falling into the rubber case, so that it can be extremely reduced in a short time. It is possible to form a homogeneous powder filling structure. Therefore, a practical effect is always obtained in which formation of a molded body free from a defect phenomenon is guaranteed at the rubber pressing stage.

[Brief description of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a sectional view showing another embodiment. 1 ... rubber case, 2 ... metal frame, 3 ... vibration motor, 4 ... pillar, 5 ... hydraulic cylinder, 6 ... lifter, 7 ... turntable, 8 ... molded powder

Claims (1)

[Scope of utility model registration request] 1. A device for uniformly filling a rubber case for a rubber press from above with a molding powder through a hopper, comprising a metal frame (2) for housing and setting the rubber case (1), A powder filling device for a rubber press having a structure comprising a plurality of vibration motors (3) arranged at opposite side surfaces of a metal frame (2) and vertically moving while abutting the peripheral surface of the metal frame.