JPS6227353Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is used in powder metallurgy, etc., where powder is placed in a molding container such as a rubber mold or a rubber bag, and external pressure is applied to form it into a solid. The present invention relates to a cold isostatic pressurizing device.

(Prior technology) A cold isostatic pressurization device uses a rubber mold containing powder,
It is used to solidify powder by placing a molding container such as a rubber bag in a pressure vessel and applying hydrostatic pressure from the outside.

Each time molding is completed, the top lid of the pressure vessel is frequently opened and closed in order to take the molding container in and out of the pressure vessel. In addition, during molding, in order to seal the high-pressure pressure medium with the pressure seal packing provided in the small diameter part of the top lid, it is necessary to minimize the gap between the inner peripheral surface of the pressure vessel main body and the small diameter part of the top lid. In pressure vessels such as the above, the spacing is significantly small compared to the diameter of the vessel. For this reason, even if the top cover was slightly tilted when opening and closing, the top cover could become twisted, making it impossible to open and close, and the gasket could be damaged.

(Problems to be solved by the invention) The present invention has been made in view of the above circumstances, and aims to prevent the top cover from tilting with respect to the pressure vessel body when opening and closing the top cover of a cold isostatic pressurizing device. The present invention provides a cold isostatic pressurizing device equipped with a top lid opening/closing device that prevents the above-mentioned effects.

(Means for Solving the Problems) The present invention has been made to solve the above problems, and is configured as follows.

A cold isostatic pressurizing device comprising a cylindrical pressure vessel body, a large diameter portion and a small diameter portion, a pressure sealing packing attached to the small diameter portion, and an upper lid that fits onto the inner peripheral surface of the pressure vessel body. In the apparatus, a mounting plate movable onto the pressure vessel main body; a cylinder for lifting and lowering the top cover, which is fixed to the mounting plate and has a rotatable rod having an engaging piece at the tip of the piston rod;
It is connected to the piston rod of the top cover guide lifting cylinder fixed to the mounting plate with a ball joint screwed onto the piston rod.
an upper lid guide having a guide portion that can fit into the large diameter portion of the upper lid and a positioning portion on the pressure vessel body; an upper lid that has a claw that can be engaged with the engaging piece of the rod;
The pressure vessel has an upper lid opening/closing device including a centering ring that stands upright on the periphery of the upper end surface of the pressure vessel body and can fit into the inner circumferential surface of the positioning portion of the upper lid guide.

(Function) Therefore, by adjusting the threaded state of the ball joints screwed onto each piston rod of the plurality of upper lid guide lifting cylinders, the upper lid guide is held almost horizontally, and the mounting plate is attached to the pressure vessel. It is positioned on the main body, and the axis of the piston rod of the cylinder for lifting and lowering the top lid, and hence the rod, is made to substantially coincide with the axis of the top lid. Next, when the cylinders for raising and lowering each upper lid guide are moved forward and lowered to lower the upper lid guide, the positioning part of the upper lid guide, along with the action of the ball joint, moves to the centering ring that stands on the periphery of the upper end surface of the pressure vessel body. Fits on the outer circumferential surface of the Thus, the axis of the top lid guide coincides with the axis of the top lid,
The guide portion of the top lid guide is in a state where it can guide the outer peripheral surface of the large diameter portion of the top lid. Next, the cylinder for raising and lowering the top lid is operated to lower the rod, the engagement piece is positioned below the claw of the top cover, the rod is rotated, and the engagement piece is locked to the claw of the top cover. When the cylinder for raising and lowering the upper lid is operated to return, the upper lid is guided by the inner peripheral surface of the pressure vessel main body in its small diameter portion, and then its large diameter portion is guided by the guide portion of the upper lid guide, and the upper lid rises without tilting. It will be held. When closing, the upper lid is guided from the guide portion of the upper lid guide to the inner circumferential surface of the pressure vessel body and is closed without tilting.

(Example) An example of the present invention will be described based on FIGS. 1 to 3.

In FIG. 1, reference numeral 1 denotes a cylindrical pressure vessel main body, and a centering ring 1a is erected on the periphery of its upper end surface. Note that the centering ring 1a may be divided and arranged. Reference numeral 2 designates an upper lid, and a hole 2a at the center of the upper surface thereof is provided with four claws 2b, which are locking pieces. The pressure vessel main body 1 is fixed on a base 3 by a plurality of supports 4. 5 is a gate-shaped press frame, and the base 3 is
It can move on the upper rail 3a. 3b is a stopper that stops the press frame 5 at an appropriate position relative to the pressure vessel main body 1. Brackets 6 are provided on both sides of a gate-shaped press frame 5, and a mounting plate 7 is provided horizontally across both brackets 6. 8 has a ring shape as a whole, and has an inner circumferential surface formed into a truncated conical surface, and a positioning portion 8a that fits on the outer circumferential surface of the centering ring 1a and the outer circumferential surface of the large diameter portion 2c of the upper lid are loosely fitted. The upper lid guide has a guide portion 8b that guides the upper lid by moving the upper lid, and is suspended from the tip of a piston rod 9a of a plurality of upper lid guide lifting cylinders 9 fixed to the mounting plate 7 so as to be allowed to swing. 10 is a cylinder for lifting and lowering the top lid, and is fixed to the mounting plate 7 with a space therebetween. The piston rod 10a is
The axis of the rod 15 is aligned with the guide part (8)b of the upper lid guide, and a rod 15 having a cross-shaped locking piece 15a that locks on the lower surface of the claw 2b of the upper lid is rotatably connected to the tip of the rod 15. constitutes a sling. 17 is a rotating device for the rod 15.

The alignment mechanism of the upper lid guide 8 to the upper lid 2 will be described in detail based on FIG. 2.

FIG. 2 shows a state in which the upper lid guide 8 is lowered,
1 is a pressure vessel main body, and 1a is a centering ring.
The upper lid 2 of the pressure vessel consists of a large diameter part 2c and a small diameter part 2c', and the small diameter part has a pressure seal packing 2.
d is provided. The outer circumferential surface of the small diameter portion 2c' fits into the inner circumferential surface of the pressure vessel main body 1 with a slight gap, and is sealed by the packing 2d. Top lid guide 8
The conical inner circumferential surface of the positioning portion 8a fits into the outer circumferential surface of the centering ring 1a, and the guide portion 8b creates a minute gap between it and the outer circumferential surface of the large diameter portion 2c when the upper cover 2 is raised. guide vertically. Mounting plate 7
The piston rod 9a of the upper lid guide lifting cylinder 9 fixed to the upper lid guide 8 is connected to the upper lid guide 8 by a ball joint 11 having a shaft portion 11a of the upper casing screwed onto the tip thereof. Therefore, each ball joint 1
1 and the piston rod 9a to level the upper cover guide 8, and then tighten the ball joint 1.
The positioning portion 8a of the upper cover guide is finely adjusted in the front, rear, right and left directions by the action of step 1, and the positioning portion 8a of the upper lid guide is formed on the outer peripheral surface of the centering ring 1a.
By fitting them together, the axes of the guide portion 8b and the upper lid 2 can be aligned. In this way, after positioning the upper lid guide 8 on the pressure vessel main body 1, the upper lid 2
When the upper cover 2 is raised, the upper cover 2 is continuously guided by the guide portion 8b from the inner circumferential surface of the pressure vessel main body 1, and can be raised without twisting.

Next, the elevating mechanism for the upper lid 2 will be explained based on FIG. 3.

The upper lid 2 has four hooks 2b protruding from a hole 2a formed in the center thereof. The cylinder 10 for lifting and lowering the top cover is fixed on a support base 12 fixed to the mounting plate 7, and a hanging tool for lifting or hanging the top cover 2 is provided at the tip of the piston rod 10a. That is, at the tip of the piston rod 10a, a cross-shaped locking piece 15a that can be respectively locked to the lower surface of the four claws 2b of the upper cover is fixed to the lower end, and a rod 15 is provided with a key groove 15c in the axial direction. are connected by a connector 13.
The connecting tool 13 has a protruding piece 14a at the lower end, an intermediate body 14 whose upper end shaft part 14b is screwed onto the piston rod 10a of the cylinder for lifting and lowering the lid, and an upper inwardly directed protruding edge 16a which is attached to the protruding piece 14a of the intermediate body. The lower inward projecting edge 16b is interlocked with a frame body 16 made of two halves that supports the head 15b of the rod 15. A rotating device 17 for the rod 15 is also provided. That is, a rotating arm 17b is provided which has a key 17a that engages with a keyway 15c of the rod and is prevented from moving, and one end of the rotating arm 17b is linked to a reciprocating device (not shown), such as a piston rod of a cylinder. 17c, and the rod 15 is connected to the piston rod 10 by the back and forth movement of the piston rod.
It can rotate relative to a. Reference numeral 18a is a guide member for the rod 15 fixed to the mounting plate 7, and reference numeral 18b is a rotating arm holding member fixed to the guide member 18a to restrain the vertical movement of the key 17a and the rotating arm 17b.

Therefore, the cylinder 10 for lifting and lowering the top lid is moved forward and the piston rod 10a is protruded, and the rod 1
5 is lowered and its tip is deeply inserted into the hole 2a of the upper cover, and then the rod 15 is rotated by the rotating device 17 to lock the locking piece 15a to the lower surface of the claw 2b. The upper cover 2 can be removed from the pressure vessel body 1 by raising the piston rod 10a.

Next, the effect will be explained.

First, the procedure for removing the top cover 2 will be explained.

Each ball joint 11 and upper cover guide lifting cylinder 9
With the top lid guide 8 held almost horizontally by adjusting the screwing part with the press frame 5, move the press frame 5 and position it so that the axes of the guide part 8b of the top lid guide and the top lid 2 almost coincide with each other. . Then,
When the cylinders 9 for raising and lowering the upper lid guide are moved forward and lower to cause each piston rod 9a to protrude, the positioning portion 8a of the upper lid guide is aligned with the centering ring 1a.
The ball joint 11 is guided by the outer circumferential surface of the ball joint 11.
The upper lid guide 8 is adjusted to be centered on the upper lid 2. Next, the upper lid lifting cylinder 10
The piston rod 10a is moved forward and operated to project the piston rod 10a, and the rod 15 is inserted into the key groove 15c in the key 17a.
After inserting the locking piece 15a into the hole 2a, the rotating device 17 is operated to rotate the rod 15 relative to the piston rod 10a via the coupling tool 13, and the locking piece 15a engage the lower surface of claw 2b. And a cylinder 10 for lifting the upper lid.
When the upper lid 2 is raised, the outer circumferential surface of the small diameter part 2c' is brought into contact with the inner peripheral surface of the pressure vessel main body 1, and subsequently the outer peripheral surface of the large diameter part 2c is brought into contact with the guide part 8b of the upper lid guide.
You will be guided up by the. After raising the upper lid 2 and the upper lid guide 8 to an extent that does not interfere with the centering ring 1a, the press frame 5 is moved until it comes into contact with the stopper 3b, and the pressure vessel main body 1
Take out the molding container (not shown) or insert the molding container into the pressure vessel main body 1.

Next, the case where the top cover 2 is placed on the pressure vessel body 1 will be described.

The press frame 5 is moved so that the guide portion 8b of the top cover guide is aligned with the axis of the pressure vessel body 1. Then, the top cover guide lifting cylinders 9 are operated forward to lower the top cover guide 8, and together with the action of the ball joints 11, the positioning portion 8 is lowered.
a is guided by the centering ring 1 a so that the axis of the guide portion 8 b of the top lid guide coincides with the axis of the pressure vessel body 1 .

Thereafter, the cylinder 10 for raising and lowering the upper lid is moved forward and the upper lid 2 is lowered from the guide portion 8b of the upper lid guide along the inner circumferential surface of the pressure vessel body 1 and placed on the pressure vessel body 1. Next, the rotation device 17 is operated to rotate the rod 15, and after releasing the engagement between the locking piece 15a and the pawl 2b, the cylinder 10 for raising/lowering the upper lid is operated in its return position, and the rod 15 is rotated.
to rise. Furthermore, each of the upper lid guide lifting cylinders 9 is operated back to raise the upper lid guide 8 to above the centering ring 1a. Then, the press frame 5 is moved and stopped at the stopper 3b.

In addition, as a rotation device for the rod 15, the rod 15 is inserted into the pinion so that it can only move up and down, and a rack is fixed to the tip of the piston rod of the cylinder, and the rack and pinion are meshed, so that the rod 15 can only move up and down. The rod 15 can also be rotated. FIG. 4 shows another structural example in place of the connecting tool 13 of the rod 15 to the piston rod 10a of the cylinder for lifting and lowering the top cover. The connector 13' consists of a cap nut member 19 and a plurality of spheres 20. The lower surface of the head 15b of the rod 15 is supported via a sphere 20 by an inward flange 19a of a cap nut member 19 screwed onto the tip of the piston rod 10a, and is rotatable relative to the piston rod 10a.

Furthermore, as a structure for moving the top lid opening/closing device onto the pressure vessel main body 1, guide rails are provided on both sides of the press frame 5 and the bracket 6, and both ends of the mounting plate 7 are guided by the guide rails. It can also be moved.

Even if the above configuration is applied to the cold isostatic pressurization device according to the present invention, the operation and effect will remain the same.

(Effects of the invention) The cold isostatic pressurizing device according to the invention is configured as described above, and therefore has the following effects.

(1) When opening and closing the top cover, the top cover can move up and down while being guided by either the inner circumferential surface of the pressure vessel main body whose centers coincide with each other or the guide surface of the top cover guide, so there is no possibility of tilting or twisting.

(2) Therefore, it is possible to prevent the top cover from becoming impossible to open and close and to prevent the packing from being damaged, resulting in stable operation, extending the service life of the packing, and facilitating its maintenance.

(3) Since the top cover is guided by either the inner peripheral surface of the pressure vessel body or the guide part of the top cover guide, the height of the top cover guide is relatively low, and therefore the accommodation space of the pressure vessel body is reduced. can be lowered.

(4) If the device is large, there is a risk that the mounting plate may bend due to the weight of the top cover and top cover guide, but even in this case, the cylinder for lifting and lowering the top cover guide of the ball joint should be screwed onto the piston rod. By adjusting the condition, the top cover guide can be maintained almost horizontally, and in conjunction with the action of the ball joint, the top cover guide can be fitted into the centering ring of the pressure vessel body, so the centering ring will not be damaged. .

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal side view of an embodiment of the cold isostatic pressurizing device according to the present invention, Fig. 2 is a partial sectional view of the centering mechanism of the upper cover guide to the upper cover, and Fig. 3 is
FIG. 4 is a sectional view of the top cover lifting mechanism. FIG. 4 is a sectional view showing another example of the structure of the rod connecting device to the piston rod of the top cover lifting cylinder. 1... Pressure vessel body, 1a... Centering ring,
2...Top lid, 2b...Claw, 2c...Large diameter part, 2
c'... Small diameter part, 2d... Packing for pressure seal, 5... Press frame, 6... Bracket,
7...Mounting plate, 8...Top lid guide, 8a...Positioning part, 8b...Guiding part, 9...Cylinder for lifting and lowering the top lid guide, 9a...Piston rod, 10...Cylinder for lifting and lowering the top lid, 10a... Piston rod, 11...
...Ball joint, 12... Support stand, 13, 13'...
Connector, 15... Rod, 15a... Locking piece, 1
5b...head, 15c...keyway, 17...rotating device.

Claims (1)

[Scope of utility model registration request] A cold isostatic pressurizing device comprising a cylindrical pressure vessel body, a large diameter portion and a small diameter portion, a pressure sealing packing attached to the small diameter portion, and an upper lid that fits onto the inner peripheral surface of the pressure vessel body. In the apparatus, a mounting plate movable onto the pressure vessel main body; a cylinder for lifting and lowering the top cover, which is fixed to the mounting plate and has a rotatable rod having an engaging piece at the tip of the piston rod;
It is connected to the piston rod of the top cover guide lifting cylinder fixed to the mounting plate with a ball joint screwed onto the piston rod.
an upper lid guide having a guide portion that can fit into the large diameter portion of the upper lid and a positioning portion on the pressure vessel body; an upper lid that has a claw that can be engaged with the engaging piece of the rod;
A cold isostatic pressurizing device characterized by having an upper lid opening/closing device including a centering ring that stands upright on the periphery of the upper end surface of the pressure vessel body and that can fit into the inner circumferential surface of the positioning portion of the upper lid guide. .