JPH0357358Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a dry isostatic pressurizing device, in particular,
This invention relates to the detachable structure of the molded rubber mold.

(Prior art) The isostatic pressure molding method is also called the rubber press method, and uses a rubber mold instead of a molding die, and encloses a powder workpiece in the rubber mold. The rubber mold is placed in a molding container and subjected to pressure molding by applying ultra-high pressure.

This hydrostatic pressure molding method can be roughly divided into dry method and wet method. The dry method is a method of pressure molding through a molded rubber mold that is pre-installed in a molding container, and does not come in direct contact with liquid. It has the advantage of being able to automate the filling of powder, pressurization, and removal of molded products, and can shorten molding time compared to the wet method, making it suitable for mass production.

As an example of this type of device, for example, Utility Model Application No. 58-96907
As shown in the publication, a molded rubber mold is housed in a molded container, and the upper opening of the molded container is closed so as to be openable and closable with an upper outer lid and an upper inner lid with an annular flange.
The lower opening of the molded container is closed with a lower outer lid with an annular flange, a lower inner lid, and a molded product knock-out device, and is configured to pressure-form the powder filled into the molded rubber mold. be.

(Problem to be solved by the invention) However, according to the device disclosed in Japanese Utility Model Application Publication No. 58-96907, the molding rubber mold is stored and held within the molding container between the lower surface of the upper outer lid and the upper surface of the lower outer lid. The upper outer cover and lower outer cover are detachably fixed to the molded container side using an upper nut part and a lower nut part, and when replacing the molded rubber mold, for example, the lower nut must be rotated. Then, lower the molding rubber mold together with the lower outer lid to take it out from the molding container, replace the molding rubber mold, raise the lower outer lid again, and remove the molding rubber mold from the molding container. It is necessary to fasten it to the molded container by rotating the lower nut. Therefore, the work of tightening and loosening the lower nut is troublesome and time consuming, and the work efficiency is low when replacing the molding rubber mold.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a molded rubber mold that can be easily and efficiently replaced and has excellent productivity.

(Means for solving the problem) The technical means is that a molded rubber mold 33 is removably housed inside the cylindrical molded container 3, and the upper opening of the molded container 3 is formed by an upper outer lid 11 and an upper punch 13. A dry method in which the powder in the molding rubber mold 33 is pressure-molded, with the lower opening of the molding container 3 being closed so as to be openable and closable with the lower outer lid 15 and the lower punch 17. In the hydrostatic pressurizing device, a lower punch 17 and a lower outer lid 15 are attached and fixed to the upper surface of a lifting platform 30 that can be raised and lowered in the vertical direction, and a molding rubber mold 33 is placed on the upper surface of the lower punch 17 and the lower outer lid 15. As the lifting table 30 is raised and lowered, it can be inserted into and removed from the molded container 3 from the lower opening side. It can be rotated freely between a clamping position in which it engages with the joint part 37 from the lower surface side and holds the lower outer lid 15, and a release position in which it rotates around the axis in the vertical direction and retreats from below the engaging part 37. A clamp device 35 having a clamp portion 36 is attached to the outer peripheral surface of the molded container 3.

(Function) According to the present invention, when replacing the molding rubber mold,
By rotating the clamp part of the clamping device around the axis in the vertical direction to change the posture from the clamped position to the released position and lower the lifting platform, the molding rubber mold together with the lower outer lid and lower punch will be moved into the molding container. It is detached further downward. In that state, replace the molding rubber mold,
After that, by raising the lifting platform, the molded rubber mold is stored in the molding container, and by changing the clamping part of the clamp device from the released position to the clamped position, the lower outer lid and lower punch are used to open the lower opening of the molding container. is kept closed.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a dry cold isostatic pressurizing device, which is equipped with a device support frame 26.

3 is a cylindrical molded container with openings at the top and bottom;
The container protection tube 4 is housed and held within the container protection tube 4.
is fixedly supported by the support frame 26.

27 is a yoke frame that supports powder axial force;
An operation cylinder 28 supported by a device support frame 26 so as to be relatively rotatable around an axis in the vertical direction allows the device to be moved between a set position and a retracted position shown by imaginary lines in FIG. 1. .

The upper opening of the molded container 3 is openably and closably closed by an upper punch 13 which is movable up and down by an upper outer lid 11 and an elevating cylinder 29. Further, the lower opening of the molded container 3 includes a lower outer lid 15 and a lower punch 1.
The lower punch 17 and the lower outer cover 15 are fixedly mounted on a crosshead 30 serving as an elevating table, and the crosshead 30 is movable vertically by an elevating cylinder 31.

33 is a molded rubber mold, configured in a cylindrical shape,
It is assembled between the upper and lower outer lids 11 and 15 in the molded container 3, and the upper and lower openings of the molded rubber mold 33 are formed by the upper punch 13.
and a lower punch 17 to seal it.

32 is a backup cylinder, and 34 is a pressurized rubber type.

Reference numeral 35 denotes a clamp device, which is attached to the lower part of the outer peripheral surface of the container protection cylinder 4. And the lower end clamp part 3
6 can be rotated freely around the axis in the vertical direction,
This rotation causes the lower outer cover 15 to open as shown in FIG.
It removably engages with an outwardly projecting flange portion 37 as an engaging portion provided on the outer periphery from the lower surface side,
The lower outer lid 15 can be freely changed into a clamped position in which it is held in a closed state and a released position in which it is retracted from below the flange portion 37 by rotation, as shown in FIG.

Next, the operation of exchanging the molding rubber mold 33 will be explained.
First, as shown by the imaginary line in FIG.
is rotated around the axis in the vertical direction to change the posture from the clamped posture to the released posture as shown in FIG. 2, thereby releasing the engagement between the flange portion 37 of the lower outer cover 15 and the clamping portion 36. Next, when the lifting cylinder 31 is operated to lower the crosshead 30, the lower outer cover 15 and the lower punch 17 will be lowered together.
The molding rubber mold 33 set on the molding container 3 is lowered, and the molding rubber mold 33 is released downward from the molding container 3, resulting in the state shown in FIG.

In this state, replace the molding rubber mold 33, operate the lifting cylinder 31 again, and move the crosshead 30.
When the molding rubber mold 33 is raised, the molding rubber mold 33 is housed in the molding container 3. Then, when the clamping part 36 of the clamping device 35 is changed from the released position to the clamping position, the flange part 37 of the lower outer lid 15 and the clamping part 36 are engaged, and the lower opening of the molded container 3 is closed. It is held in this state and a moldable state is obtained.

As described above, the lower punch 17 and the lower outer lid 15 are attached and fixed to the upper surface side of the crosshead 30, and the lower opening of the molded container 3 is opened by engaging and disengaging the flange portion 37 of the lower outer lid 15 and the clamp portion 36. can be held in the closed state and released freely, and the clamp part 36 and the flange part 37 can be engaged and disengaged by simply rotating the clamp part 36 about the axis in the vertical direction to change the posture between the clamped position and the released position. It is easy to engage and disengage, and has excellent workability. Also crosshead 3
Since both the lower punch 17 and the lower outer lid 15 are fixed to the crosshead 30 side when the mold 0 is lowered, the molding rubber mold 33 can be reliably removed from the molding container 3. The replacement work can be done easily and efficiently, and productivity can be improved.

(Effects of the invention) According to the invention, the molded rubber mold is removably housed inside the cylindrical molded container, and the upper opening of the molded container is closed so as to be openable and closable with the upper outer lid and the upper punch. , in a dry isostatic press device for pressure-molding powder in a molding rubber mold, in which the lower opening of the molding container is closed so that it can be opened and closed by a lower outer lid and a lower punch, and the lower opening of the molding container is freely raised and lowered in the vertical direction. The lower punch and lower outer lid are attached and fixed to the upper surface of the lifting platform, and the molding rubber mold is placed on the upper surface of the lower punch and lower outer lid, and is inserted into and removed from the lower opening side of the molding container by raising and lowering the lifting platform. When the lower opening is in the closed state due to the raising and lowering platform, the clamping position is such that the lower outer cover is held by engaging from the lower surface side with the engaging part provided on the outer periphery of the lower outer cover, and the lower outer cover is held in the vertical direction. A clamp device is attached to the outer peripheral surface of the molded container, and has a clamp part that can be freely rotated into a release position that rotates around the axis and retreats from below the engagement, and is attached to the outer peripheral surface of the molded container. It has the advantage that replacement work can be done easily and efficiently, and productivity can be improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional side view of the molded rubber mold attached, and FIG. 2 is a partially sectional explanatory diagram of the molded rubber mold removed. 1... Hydrostatic pressure device, 3... Molded container, 11
...Upper outer lid, 13...Upper punch, 15...Lower outer cover, 17...Lower punch, 30...Crosshead,
33...Molding rubber mold, 35...Clamp device, 3
6... Clamp part, 37... Flange part.

Claims (1)

[Scope of utility model registration request] A molded rubber mold 33 is removably housed inside the cylindrical molded container 3, and the upper opening of the molded container 3 is connected to the upper outer lid 1.
1 and the upper punch 13, and the lower opening of the molded container 3 is freely opened and closed by the lower outer lid 15 and the lower punch 17, and the powder in the molded rubber mold 33 is closed. In a dry isostatic pressurizing device for pressure forming, a lifting platform 3 that can be raised and lowered in the vertical direction
A lower punch 17 and a lower outer lid 15 are attached and fixed to the upper surface side of 0, and a molding rubber mold 33 is placed on the upper surface side of the lower punch 17 and lower outer lid 15, and is lowered into the molded container 3 by raising and lowering the lifting table 30. It can be freely inserted and removed from the opening side, and when the lower opening is in the closed state as the lifting platform 30 rises, the lower outer lid 15 is engaged with the engaging portion 37 provided on the outer periphery of the lower outer lid 15 from the lower surface side. Clamping device 3 equipped with a clamping part 36 that can be rotated freely between a clamping position in which it is held and a releasing position in which it is rotated around an axis in the vertical direction and retracted from below the engaging part 37.
5 is attached to the outer peripheral surface of the molded container 3.