JPH0337835Y2 - - Google Patents

Description

[Detailed description of the invention] The invention of the present application aims to solve the following problems.

(Field of Industrial Application) This invention relates to a forming press such as a tile press that presses and forms forming raw materials.

(Prior Art) Conventionally, in a powder molding press, a metal frame is generally supported so as to be able to move up and down by a cylinder for a frame cushion, and the cylinder is used to move the metal frame during feeding of raw materials and demolding of a molded product. The metal frame is reliably held at its upper limit, and during pressure forming, the metal frame is supported in a floating dam manner with an output commensurate with the weight of the entire metal frame. However, in conventional molding presses of this type, the cylinder for operating the lower mold is installed only below the center of the lower mold to move the lower mold up and down. When the size of the mold (lower mold and upper mold) increases, the lower mold becomes distorted due to the pressure applied when demolding the molded product, and the lower mold tilts due to uneven load resistance on the left and right sides, resulting in a decline in the quality of the molded product. I came across a problem.

(Problems to be solved by the invention) This invention eliminates the above-mentioned conventional problems and is capable of molding large-sized molded products with good quality by reducing distortion and inclination of the lower mold even when the mold becomes larger. is possible,
Moreover, it is an object of the present invention to provide a molding press that can suppress increases in costs and installation space.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Operation) The molding material is put into the metal frame with the metal frame raised by the frame piston and the lower mold lowered by the lower mold piston, and then the upper mold is lowered relative to the lower mold. The molding raw material in the metal frame is then pressure molded. In the case of this pressure forming, the metal frame is supported in a floating dam state by a frame piston so that it can freely move up and down. As a result, the molding material inside the metal frame is pressurized evenly above and below, reducing shoulder collapse. Further, the pressure-molded product is removed from the mold by raising the lower mold relative to the metal frame and pushing it up from within the metal frame. In this case, each of the four corners of the metal frame is supported by a frame piston, and each of the four corners of the lower mold is raised by a lower mold piston, thereby preventing distortion and tilting of the metal frame and lower mold during demolding. . Furthermore, when manufacturing a molding press, by providing each frame piston in a frame cylinder formed on each lower mold piston, the installation space for the cylinders for supporting the lower mold and the metal frame can be reduced.

(Example) Below, drawings showing examples of the present application will be described.

Referring to Figures 1 and 2, 1 is a base frame, which includes a lower bed 2, a pair of left and right tie rods 3 fixed to the lower bed 2, and an upper frame 4 fixed to these tie rods 3. It is made up of. Reference numeral 5 denotes an upper mold which is attached to the press body 1 so as to be vertically movable, and an upper mold slide 6 whose sliding holes 6a at both ends are fitted into the tie rods 3 so as to be vertically slidable; It is composed of a plurality of upper mold elements 7 fixed to the lower surface of the mold.

A main ram cylinder 8 is attached to the upper frame 4, and its piston rod 8a is connected to the upper mold slide 6. Reference numeral 9 denotes a lower mold that is attached to the press body 1 so as to be able to move up and down, and as shown in FIGS. a lower die surface plate 10 fitted to the plate guide 11 so as to be slidable up and down;
It is composed of a plurality of lower mold elements 12 fixed to the upper surface of the lower mold surface plate 10. Reference numeral 13 denotes a metal frame which is attached to the base frame 1 so as to be vertically movable, and the sliding holes 14a at both ends are connected to the upper surface of the frame guide 14 which is fitted to the tie rod 3 so as to be vertically slidable. It is composed of a fixed metal frame element 15. A plurality of molding holes 16 are formed in the metal frame element 15, and the lower mold element 12 is inserted into these molding holes 16.
The upper part of the is fitted. 17 is a cylinder for operating the lower mold that moves the lower mold 9 up and down;
As shown in FIGS. 5 and 6, they are arranged at four locations corresponding to the four corners of the lower mold surface plate 10, respectively.
The four corners of the screen can be moved up and down. In the cylinder 17, 18 is a base cylinder fixed to the lower bed 2, and has a sliding hole 19 open at the top and a supply/discharge hole 20 for supplying and discharging pressurized liquid. 21 is a piston for the lower mold that is fitted in the sliding hole 19 so as to be able to slide vertically, and the upper end is fitted with the mounting bolt 2.
2 is integrally connected to the lower surface of the corner of the lower mold upper plate 10. 23 is a first liquid chamber formed within the base cylinder 18. Next, reference numeral 24 denotes frame cushion cylinders that support the metal frame 13 in a vertically movable manner, and are arranged at four locations corresponding to the four corners of the frame guide 14, so as to support the four corners of the frame guide 14. It is set as. In the cylinder 24,
A frame cylinder 25 is formed on the lower mold piston 21 and has a sliding hole 26 that is open at the top. Reference numeral 27 denotes a frame piston that is fitted into the sliding hole 26 so as to be slidable up and down.The frame piston 27 is inserted into the through hole 28 of the lower die surface plate 10, and the upper end is connected to the mounting bolt 2.
It is integrally connected to the lower surface of the corner of the frame guide 14 by means 9 and 30. Reference numeral 31 designates a second liquid chamber formed on the lower side of the frame piston 27, a second liquid chamber formed in the frame piston 27, and 32 a supply/discharge hole for supplying and discharging pressurized liquid. Next, numeral 33 is a raw material filling adjustment device that adjusts the lifting position of the lower die 9 and the metal frame 13 to adjust the amount of raw material to be filled. In this raw material filling adjustment device 33, reference numeral 34 denotes an adjustment bolt whose upper end is integrally fitted into the frame guide 14, and as shown in FIG. It passes through a through hole 36 provided in the lower bed 2, and its lower end protrudes into an inner pocket 37 formed in the lower bed 2. This adjustment bolt 34 is attached to the frame guide 14 as shown in FIG.
are provided at each of the four corners. 38 is an annular receiving plate that is attached to the lower bed 2 by a mounting bolt 39 at the position of the through hole 36 on the inner surface of the inner pocket 37, and 40 is the upper limit of the metal frame that is screwed into the lower end of the adjustment bolt 34. This adjustment nut 40 is adapted to abut against the receiving plate 38 to regulate the upper limit of the frame guide 14. 41 is a worm wheel formed around the adjustment nut 40, 42 is a worm wheel shaft rotatably supported on the lower bed 2, and 2 on the corresponding side.
Two worms 43 that engage with two worm wheels 41 are fixedly attached. This worm shaft 42
As shown in FIG. 3, a pair of left and right worm shafts are provided, and these worm shafts 42
The chain wheels 44 fixed to the chain wheels 2 and the connecting chain 45 suspended from the chain wheels 44 rotate in synchronization. 46 is one worm shaft 4
By rotating the adjustment handle attached to 2, the worm wheel 43 rotates and the adjustment nut 40 is rotated.
0 can be moved up and down with respect to the adjustment bolt 34. Reference numeral 47 indicates a cylindrical crushing body integrally screwed into the through hole 35 of the lower mold upper plate 10, and reference numeral 48 indicates a lower mold upper limit adjustment screwed into the vicinity of the upper end of the adjustment bolt 34. This adjustment nut 48
The crushing body 47 is configured to crush and regulate the upper limit of the lower die surface plate 10.

Next, FIG. 7 shows a hydraulic circuit 49 for operating the lower mold piston 21 and the frame piston 27 at the four locations. In this hydraulic circuit 49, 50 is a hydraulic pump, 51 is a liquid tank, and 52
55 are logic valves, and one logic valve 54 has a throttle 56. 57 is a relief valve, 58
is a pilot check valve, 59 and 60 are solenoid valves,
61 is a check valve, and 62 and 63 are control liquid pipes.

In the case of the above structure, when lowering the lower mold 9 with respect to the metal frame 13 to fill the molding raw material, the solenoid valve 59 is turned on while the upper mold 5 is raised.
ON (excited state) and the solenoid valve 60 is also turned ON. When the solenoid valve 59 is turned on, the pressure liquid closes the logic valve 52 and opens the logic valve 53, thereby causing the control liquid pipe 62 and the supply/discharge hole 20
is communicated with the liquid tank 51, and each first liquid chamber 23 becomes in a pressureless state. Further, when the solenoid valve 60 is turned ON, the pressure liquid closes the logic valve 54 and opens the logic valve 55, whereby the pressure liquid is supplied to the control liquid pipe 63 and the supply/discharge hole 32, and the pressure liquid is supplied to each second liquid. Room 31
becomes pressurized due to hydraulic pressure. This second liquid chamber 3
1, the lower mold piston 21 (frame cylinder 25) is lowered to the lowest end, and the frame piston 27 is raised. The lower mold surface plate 10 is lowered by lowering the lower mold piston 21,
Each lower mold element 12 is lowered. Further, by raising the frame piston 27, the frame guide 14 is raised, and the metal frame element 15 and the adjustment bolt 34 are raised. As shown in FIG. 6, the raising of the frame guide 14 is stopped when the adjustment nut 40 comes into contact with the receiving plate 38, and the frame guide 14 and the metal frame element 15 are held at the highest position. As a result, a space is formed in the molding hole 16 of the metal frame element 15 as shown in FIG. 3, and in this state, the molding material is filled into the molding hole 16 by a raw material filling adjustment device (pressurer) not shown. .

Next, when press-molding the molding raw material, the solenoid valve 60 is turned off while the solenoid valve 59 is turned on.
(de-energized state). By turning off the solenoid valve 60, the logic valve 54 is opened and the logic valve 55 is closed, thereby opening the control liquid pipe 63.
The supply of pressure liquid to the control liquid pipe 63 and the supply and discharge hole 32 is stopped, and the control liquid pipe 63 and the supply and discharge hole 32 are connected to the relief valve 57.
It is possible to communicate with the liquid tank 51 via a logic valve 54 controlled by the set pressure of the liquid. Therefore, the pressure in each second liquid chamber 31 is maintained at a predetermined pressure determined by the set pressure of the relief valve 57. This each second
The pressure in the liquid chamber 31 is set in advance by the relief valve 57 so that the pressure as a whole generates a supporting force commensurate with the weight of the entire metal frame 13, so that the frame guide 14 and the metal frame element 15 are free from the flow. It is supported in the teing state. In this state, the main ram shilling 8
is operated to lower the upper mold 5, whereby each upper mold element 7 fits into each molding hole 16, and the molding material is pressure-molded between it and the lower mold element 12. During this pressure molding, since the metal frame element 15 is supported in a floating state as described above, the molding raw material is pressurized evenly above and below, thereby preventing the molded product from collapsing.

Next, the metal frame 13 and the lower mold 9 are used to remove the molded product.
When raising the upper die 5, after raising the upper die 5,
Turn on the solenoid valve 59 with the solenoid valve 60 turned off.
Make it. By turning on the solenoid valve 59, the logic valve 52 is opened and the logic valve 53 is closed.
A pressurized liquid is supplied to each of the first liquid chambers 23, and each first liquid chamber 23 is put into a pressurized state. Further, by turning on the solenoid valve 59, the pilot check valve 58 is opened and the logic valve 54 is opened, whereby each of the second liquid chambers 31 becomes unpressurized. The lower mold piston 21 is raised by the pressure increase in each of the first liquid chambers 23, and the lower mold platen 10 and the lower mold element 12 are raised by the rise of the lower mold piston 21. As the lower mold surface plate 10 rises, the crushing body 47 hits the adjusting nut 48 and raises the adjusting bolt 34 and the frame guide 14, and then the adjusting nut 40 hits the receiving plate 38. Therefore, the lower mold surface plate 10 and the frame guide 14 are stopped from rising at the highest position. As a result, each lower mold element 12 pushes out the molded product in the molding hole 16 and demolds it. In this case, since the lower die surface plate 10 and frame guide 14 are pushed up evenly at the four corners, distortion and inclination of the lower die surface plate 10 and frame guide 14 during demolding are prevented.
Each lower mold element 12 can accurately push up the molded product, and can prevent deformation of the molded product during demolding.

(Effect of the invention) As described above, in the case of the present invention, when the molding raw material is pressure-molded, the molding raw material is placed inside the metal frame 13 while the lower mold 9 is lowered relative to the metal frame 13. Then, the upper mold 5 is lowered relative to the lower mold 9 to pressurize the molding material in the metal frame 13, and then the upper mold 5 is raised and the lower mold 9 is lowered relative to the metal frame 13. The molded product can be taken out from the metal frame 13 by raising the molded product.

When pressurizing the molding raw material by lowering the upper mold 5 relative to the lower mold 9 as described above, the metal frame 13 can be supported in a floating state by the frame piston 27, and the metal frame 13 can be supported in a floating state by the frame piston 27. Compared to the case where the mold 13 is fixed to the lower die 9, the shoulder collapse of the molded product can be reduced and the quality of the molded product can be improved.

Further, when the lower mold 9 is raised relative to the metal frame 13 to take out the molded product from the metal frame 13, the lower mold 9 is raised by the lower mold pistons 21 at each of the four corners. Since the metal frame 13 is also supported at each of the four corners by frame pistons 27, even if the molding press becomes larger and the metal frame 13 becomes larger, the lower die 9 and the metal frame 13
It is possible to prevent distortion and inclination of the molded product, thereby reducing distortion of the molded product and improving its quality.

Further, as described above, the four corners of the lower die 9 are moved up and down by the lower die pistons 21, and the four corners of the metal frame 13 are also individually supported by the frame pistons 21. However, each of the cylinders at the four corners includes a base cylinder 18 connected to the base frame 1, and a lower mold piston 2 that can freely move up and down at a position above the base cylinder 18.
1, a frame cylinder 25 formed on the lower mold piston 21, and a frame piston 27 that can freely move up and down at a position above the frame cylinder 25. Control liquid pipes 62 and 63 are connected to the liquid chambers 23 and 31 of the cylinder 18 and the frame cylinder 25 above the cylinder 18 so as to be individually controllable, and the lower mold piston 21, The frame piston 27 is
Since they are connected to the lower mold 9 and the base frame 13 so that they can be individually interlocked with each other, the support spaces for supporting the lower mold 9 and the base frame 13 can be set in virtually four places, and thereby The space for vertically moving the lower mold 9 and the base frame 13 can be reduced, and the molding press can be prevented from increasing in size.

In addition, when lowering the lower mold 9 with the metal frame 13 raised, supplying pressurized liquid to the liquid chamber 31 of the frame cylinder 25 allows the metal frame 13 to be raised and the lower mold 9 to be lowered. Since the control liquid pipe for raising the metal frame 13 and the control liquid pipe for lowering the lower mold 9 can be configured with a common piping, the overall piping can be reduced accordingly. This has the advantage of suppressing increases in manufacturing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application; Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is an enlarged front view showing the main part in cross section, and Fig. 4 is a cross section showing the main part. The enlarged side view shown in FIG. 5 is partially omitted.
Line enlarged sectional view, Fig. 6 is - line enlarged sectional view,
Figure 7 is a hydraulic circuit diagram. 1...Base frame, 5...Upper mold, 9...Lower mold, 13...
... Metal frame, 18 ... Base cylinder, 21 ... Piston for lower mold, 25 ... Cylinder for frame, 27 ... Piston for frame, 23, 31 ... Liquid chamber, 62, 63 ... Control liquid pipe.

Claims (1)

[Scope of utility model registration request] The base frame of the molding press is equipped with an upper mold and a lower mold that can be moved up and down, and is also equipped with a metal frame that can be moved up and down relative to the lower mold,
Furthermore, in a molding press in which the lower mold and the metal frame are each supported by cylinders at their four corners, each of the cylinders disposed at the four corners has a base cylinder connected to the base frame, and a base cylinder connected to the base frame. A lower mold piston that can freely move up and down in an upper position, a frame cylinder formed on the lower mold piston, and a frame that can freely move up and down in an upper position of the frame cylinder. Control liquid pipes are connected to the liquid chambers of the base cylinder and the cylinder above it so that they can be individually controlled, and the lower mold piston and , a molding press characterized in that the frame pistons are respectively connected to the lower mold and the metal frame so as to be individually interlocked with each other.