JPS6119325B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an object of the present invention, in various horizontal press machines such as extrusion presses, by improving the platen device that shares support for the press mechanism, especially the support mechanism on the movable platen side. This invention relates to an apparatus that facilitates improved accuracy, firm and stable assembly of the entire press frame, and performance of its functions.

A horizontal press machine in which a fixed platen and a movable platen are placed opposite each other on the press bed, and the necessary press mechanisms including the power source are distributed on both platen sides, are representative of the horizontal extrusion press machine and the hydrostatic extrusion press machine. It is one of the most commonly used press machine types, including injection molding machines. For example, the most well-known horizontal extrusion press machine extrudes a billet through a die to form the desired rod-shaped or tubular product, but the mechanical problems with this type of horizontal press machine are that it This is due to the support structure in the press frame that supports the enormous weight of the press machine. That is, in the above-mentioned horizontal extrusion press, etc., regardless of indirect extrusion or direct extrusion, the press frame is a press bed (bed) extending in the press axis direction, although not shown in the drawings as is well known. A fixed platen is fixedly supported in an immovable position on one side, and this fixed platen has a main cylinder, a main ram that moves forward and backward by fluid pressure to the main cylinder, and a main cylinder attached to the main ram, which is called a main cylinder frame. The extrusion force and extrusion members, which are one half of the extrusion press mechanism such as a cross head and pressure stem, are arranged, and on the other side of the press bed, a movable platen called a press platen facing a fixed platen is connected by a column. Once assembled, the movable platen is installed so that it can slide along the bed following the expansion and contraction associated with the extrusion operation of the column, and the other half of the extrusion press mechanism, the die and die stem, are attached to this movable platen. Extrusion molding members such as a mold and a die holder are installed, and the billet is charged and set together with a billet container between the pressure stem and the die stem, and as the pressure stem advances, the billet is extruded into a rod or a tubular body through the die stem. It is customary to adopt a frame structure in which the molded product is discharged from the machine through the movable platen through-hole, and horizontal press machines have more or less the same configuration, but in this case, the die, die stem, On the movable platen side, which supports part of the press mechanism such as the die holder or die slide, it is supported freely on the bed.
Since a part of the press mechanism is installed on one side of the platen in a protruding manner along the press axis, it is not possible to simply support the platen side on the bed as in the past.
The huge total weight, including the weight of the platen, the weight of a part of the press mechanism, and half the weight of the column, is eccentrically supported on the platen side, and the movable platen (press platen) is attached to the fixed platen (main cylinder frame). ) will exhibit a state of forward leaning toward the side. For example, indirect extrusion type has a long die stem, die stem sliding mechanism,
Furthermore, since the entire weight of the 1/2 length of the column extending between the platens is carried on the platen side, the center of gravity of the total weight is located in front of the front of the platen, so the movable platen tends to fall forward. Only when a load is applied will the platen remain upright. As is known, when extruding a tubular body using an indirect extrusion press, it is extremely important to check the die alignment of the tip of the die stem during extrusion in order to eliminate uneven thickness and obtain the correct extruded shape. At this time, the centering of the die stem tip under no load can be easily measured, but it is impossible to measure how far the die stem tip is misaligned during extrusion compared to when no load is applied. The occurrence of a tendency to collapse is naturally predicted to occur due to considerable fluctuations between the no-load and load-load conditions of the die stem, which is unfavorable from the viewpoint of controlling the press axis and therefore the extrusion accuracy, and is necessary to ensure that the press center is properly aligned without deviation. It is extremely important to maintain the same precision regardless of whether the platen is loaded or unloaded.To achieve this, it is important to ensure that the platen is supported by both platens and columns as part of the press frame, especially when the movable platen is tilted forward. Vertical support becomes necessary.

The present invention relates to improvement of platen support means in various horizontal press machines including the above-mentioned horizontal extrusion press machine, and its features include:
A fixed platen is supported in an immovable position on one side of the press bed, and a movable platen connected to the fixed platen by a column is supported on the other side so that it can follow the expansion and contraction of the column, and the press mechanism is shared between both platens. A platen device for a horizontal press comprising: for supporting the movable platen;
In addition to slidably supporting the lower surfaces of both sides of the movable platen on the press bed, the protruding portion of the movable platen on the fixed platen side or the central portion parallel to the press axis of the press mechanism distributed to the movable platen is supported from below. At the same time, a support member having a sliding surface for follow-up is placed in front of the both side support portions, and the tip end of the support member on the fixed platen side is connected to the platen weight of the movable platen and the weight of the press mechanism distributed to the movable platen. and 1/2 of the weight of the column, which is located closer to the fixed platen than the overall center of gravity of the entire weight.

The present invention will be described in detail below based on each of the illustrated embodiments.
Although the models are different from each other, Figures to Figures 9 show each embodiment of the present invention applied to an indirect extrusion press, and Figures 10 to 11 show the present invention applied to a direct extrusion press. Fig. 12 to Fig. 13 show an embodiment of the present invention applied to a hydrostatic extrusion press machine. This is an example in which the present invention is implemented in an indirect extrusion press machine installed in a gate lock system on a platen (hereinafter the same applies).
Both Figures 3 and 3 show cross-sectional views taken along lines A-A and B-B in Figure 1, but in these figures,
Reference numeral 1 indicates a press platen as a movable platen which is the object of the present invention, 9 indicates a main cylinder frame as a fixed platen opposed to the press platen 1, and a bed (bed) extending in the press axis direction.
A main cylinder frame 9 is fixedly supported on one side of 2, and a press platen 1 is connected to the main cylinder frame 9 by a plurality of columns 8.
is provided with a sliding surface on the other side of the bed 2 through a connection between the sliding surface 2a on the bed 2 side and the sliding surface 1a on the platen 1 side, so that it can move along with the expansion and contraction caused by the extrusion operation of the column 8. supported under movable condition. At this time, as is known, on the main cylinder frame 9 side, although not shown, there is a main cylinder, a main ram slidably mounted on the cylinder, a main class head formed integrally with the main ram, and furthermore, Among the press mechanisms necessary for a horizontal extrusion press, such as the main ram, the pressure stem accompanying the class head, and other mechanisms that mainly provide the extrusion force, the press platen 1 side is installed in a divided manner. Usually, in the case of a gate lock type in which the die stem slides along the press axis, the die stem 6 is provided in the center of the outer holder 4, which is positioned at a predetermined position on the front of the press platen 1 by a positioning key 18, as shown in the figure. An inner holder 3 having a built-in die slide holder 5 is assembled, and the inner holder 3 and outer holder 4 are connected to the lock plate 1.
7 and is fastened to the press platen 1 side via a tension bolt 16 and a hydraulic jack 16a to hold the die slide holder 5, and an initial table 7 is connected to the rear end of the holder 5 through the through hole 1b of the press platen 1. are held in series, and each member of the extrusion press mechanism, mainly on the die side, is disposed on the press platen 1 side. Each structure explained above is a well-known structure in a conventional indirect extrusion press machine of this type with a gate lock type.
In the conventional structure in which the column 8 is supported so as to follow the expansion and contraction of the column 8 through the column 2a, there is a drawback that the press platen 1 tends to tilt forward to the right in FIG. 1 in the following points. . That is, in the figure, W ₁ is the weight of the platen 1 itself, L ₁ is the length from the rear end surface of the platen 1 to the center of gravity, W ₂ is the weight of the outer holder 4, and L ₂ is the length to the center of gravity, W ₃ is the weight of the die slide holder 5, L ₃ is the length to its center of gravity, W ₄ is the weight of the inner holder 3, L ₄ is the length to its center of gravity, and W ₅ is the length that protrudes from the inner holder 3. L ₅ is the weight of the die stem 6, and W ₆ is the length of the column 8 between the press platen 1 and the main cylinder frame 9 (all four columns arranged diagonally in the example). 1/2 of weight
In terms of weight, L ₆ also indicates the length to its center of gravity, L ₇ is the length between the press platen 1 and each inner side of the main cylinder frame 9, and L ₃ is the length of 1/4L ₇ of each column 8. and _L9 indicate the thickness of the press platen 1, respectively. Therefore press platen 1
When supporting the platen on the bed 2, not only the weight W ₁ of the platen itself but also W ₁ , W ₂ , W ₃ , W ₄ , W ₅ ,
A total weight W ₀ , which is the sum of all weights over W ₆ , will be supported. Therefore, if we assume that the length from the rear end surface of the press platen 1 to the center of gravity of this total weight W ₀ is L ₀ , the sliding surface 1a is such that the thickness of the press platen 1 stays at L ₉ as in the conventional case. In the support structure made up of portions 2a, due to the relationship L ₀ > L ₉ , the center of gravity of the total weight W ₀ is naturally located outside of the support structure made up of sliding surfaces 1a and 2a, so the platen 1 tends to fall forward. It is inevitable. For this reason, as shown in the drawing, the present invention has a length Ls from the rear end surface of the press platen 1 on the press bed 2.
However, a support member 10 is provided at a position having a length greater than the length L ₀ to the center of gravity of the total weight W ₀ , and a sliding surface 10 a is provided on this support member 10 and corresponds to the support member 10 . Press platen 1
The side installation member, that is, the outer holder 4 in the illustrated example, is provided with a sliding surface 4a, and the sliding surface 4a is slidably supported on the sliding surface 10a of the support member 10, thereby reducing the total weight W ₀ The center of gravity of the support member 10 is located inside the outer end of the support member 10. At this time, the sliding surface 1 on the press platen 1
It is appropriate to apply a BC material or the like to the sliding surfaces 10a, 4a of the new support member 10 to prevent seizure, and to lubricate them at the same time. Further, the number of columns 8 is not limited to only four, of course, but also includes two-post type and three-post type.

In the application example of the horizontal extrusion press shown in FIGS. 1 to 3 of the present invention, the forward tilting phenomenon of the press platen 1, which is a movable platen, is extremely effectively and reliably prevented. As described above, according to the present invention, the support member 10 is located outside the center of gravity of the press platen 1 including the column 8, that is, the total weight _W0 , and at least its outer end is located forward. By installing the movable platen on the bed 2 and supporting it so that the center of gravity is inward from the support member 10, the movable platen having a total weight W ₀ is stably supported, and the platen 1 does not fall forward. The die mechanism protruding from the front of the platen 1 is prevented from drooping, and the tip of the die stem 6 is correctly centered on the press center and maintained, ensuring that the center of the die stem is not affected by load or no load as in the conventional case. is constant regardless of
This improves press precision, and allows extruded products to always be produced with excellent quality that adheres to the die correctly without problems such as uneven thickness, distortion, or bending. At this time, the movement of the movable platen 1 due to the expansion and contraction of the column 8 is also caused by the sliding surfaces 1a and 2a on the platen 1 side and the sliding surface 4 on the supporting member 10.
With the guidance of a and 10a, extremely smooth advancement and retraction can be achieved correctly, and even as a frame structure consisting of the main cylinder frame 9 and column 8, which are fixed platens, and the press platen 1, which is a movable platen, it is stable, strong, and localized. This prevents troubles such as deformation, breakage, and misalignment of assembly parts without adding undue stress, and improves the robustness and durability of the main frame of the press under harsh operating conditions. . At this time, the sliding support portion of the previous platen 1 that is connected to the bed 2 through the sliding surfaces 1a and 2a can be regarded as a part of the new support member 10, and the support member 10 can be considered as a part of the new support member 10.
It is also possible to form the sliding surfaces 1a and 2a in common by extending it to the side, but this is due to the shape of the platen 1,
Due to the differences in size, shape, and size of each member of the press mechanism distributed over one surface of the platen, it is advantageous in terms of design to form the press mechanism in a divided manner as shown in the figure.

The embodiment shown in FIGS. 4 to 6 is an indirect extrusion horizontal press machine, but shows an example in which the present invention is applied to an intermediate frame type machine.
Figure 4 is a sectional side view of the main part of the press platen, which is the movable platen, and Figures 5 and 6 are Figure 4 A-A.
In these figures, reference numeral 1 denotes a press platen, which is slidably supported on one side of the press bed 2 via the joining of sliding surfaces 1a and 2a. Corresponding to the platen 1, on the other side of the press bed 2, there is a main cylinder frame 9, which serves as a fixed platen and is connected by a plurality of columns 8 (in the illustrated example, a diagonal four-column type). The slide holder 5 of the die stem 6 is fixed to the press platen 1 side to form a frame body.
An intermediate frame 11 that surrounds the die stem 6 and has a guide ring 11a is fitted on the outside of the intermediate frame 11 so as to be freely movable. The cylinders 12 (two cylinders 12 are installed diagonally) are connected and supported so that they can move forward and backward, and the press platen 1 has a cylinder 13 for moving the container holder 15, which is different from the cylinder 12 for moving the intermediate frame. Two piston rods are provided diagonally at symmetrical positions, and are connected and supported to a container holder 15 by a piston rod 14 of the same cylinder 12. Also in this type of device, in the present invention, as in the case of the embodiment shown in _FIG . It is placed on the bed 2, and the corresponding part on the platen 1 side is slidably supported via the sliding surface 10a. In this type, W ₁ is the weight of the container holder moving cylinder 13 that protrudes from the first surface of the press platen to the left in the figure, L ₁ is the length between its center of gravity and the end surface of the platen, and W ₂ is the weight of the moving cylinder 12 of the intermediate frame 11 that also protrudes from the surface of the platen 1, and L ₂ is the length to the center of gravity,
W ₃ is the weight of the platen 1 itself, L ₃ is the length to the center of gravity, W ₄ is the weight of the die slide holder 5, and L ₆ is the length to the center of gravity.
W ₅ is the weight of the die stem 6 protruding from the die slide holder 5, L ₅ is the length to its center of gravity, and W ₆ is 1/2 of the weight of the piston rod 14 protruding from the cylinder 13 for moving the container holder. In terms of weight, L ₆ indicates the length to its center of gravity, and W ₇ indicates the weight of 1/2 of the total weight of the column 8 between the press platen 1 and the main cylinder frame 9, and L ₂
indicates the length (L ₁₂ +L ₉ ) up to the center of gravity, and in this case, the total weight W ₀ is the above
The total weight of W ₁ , W ₂ , W ₃ , W ₄ , W ₅ , W ₆ and W ₂ is the total weight, and the center of gravity of this total weight W ₀ is located inside the outer surface of the supporting member 10. Set the installation position of the support member 10 in the same manner as in Figure 1, and determine the length L ₀ that reaches the center of gravity of the total weight W ₀ as shown in the diagram.
A support member 10 is provided with a length Ls longer than , a sliding surface 10a is provided on the upper surface of the support member 10, and a member at a position corresponding to this support member 10, in the example shown, the press platen 1 is attached. The portion 19 is provided with a sliding surface 19a that contacts and supports the sliding surface 10a, so that this portion is slidably supported. In this case, the cylinder 13 for moving the container holder in the press platen 1 and the cylinder 12 for moving the intermediate frame are installed in the support member 10 in a penetrating manner. Even in the case of this type, the function of the support member 10,
The effect is exactly the same as that of the embodiment shown in FIG. Appropriate support effects can also be obtained for the moving cylinders 12 and 13 arranged diagonally. In the illustrated example, L ₈ is the length between the press platen 1 and the inner surface of the main cylinder frame 9, L ₉ is the 1/4 length of L ₃ , and L ₁₀ is the piston rod protruding from the cylinder 13 for moving the container holder. 14, _L11 is a quarter length of _L10 , and _L12 is the thickness of the press platen 1.

The embodiment shown in FIGS. 7 to 9 is also an indirect extrusion horizontal press machine, but the embodiment shown in FIGS.
This is a type that further adds a platen reinforcement type to the intermediate frame type illustrated in the figure, and in this type, in addition to the structure of the intermediate frame 11 illustrated in Figures 4 to 6, the thickness of the press platen 1 itself is difference
The difference is that _L12 is made thicker and stronger, it goes into the inner surface of the platen 1 to form a mounting part 19a, and the die slide holder 5 of the die stem 6 is installed in a way that it goes inside the platen. 6th
The same reference numerals as those in the illustrated embodiments indicate the same members and structures, and each weight W ₁ or less W ₂ and each weight W ₁ or less
The length L ₁ or less L ₇ to each center of gravity position at W ₇ is exactly the same, and the explanation for each length L ₈ or less L ₁₂ is also exactly the same, but the thickness L at the press platen 1 ₁₂ has been changed to a thicker wall, there are differences due to the change in the position of the mounting part 19a, and furthermore, the cylinder 13 for moving the container holder and the intermediate frame 11.
Coupled with the change in the installation position of the moving cylinder 12, its total weight W ₀ and the length L ₀ leading to its center of gravity change as shown in Figure 7, so in this case as well, the center of gravity is The position of the support member 10 set to be inside the member 10 is the front end position of the reinforced press platen 1 as shown in the figure, so in this case, the sliding surface 1c is provided at the corresponding position of the platen 1. This is supported on the sliding surface 10a of the support member 10 on the bed 2, and as a result, the press platen 1 has a structure in which a sliding surface 1a and a new sliding surface 1c are provided. In this case as well, the action and effect of the support by the support member 10 are exactly the same as in the case described above, and in either case,
Place the support member 10 at the position of L ₀ <Ls, the model number,
It is only necessary to design and install it so that it does not cause any problems depending on the structure, and in this example, Ls corresponds to _L12 . In addition, in Figures 4 and 7, G
1 shows a sliding guide device such as the intermediate frame 11.

All of the above are examples of application to an indirect extrusion horizontal press machine, but the ones shown in Figures 10 and 11 are
An example of application to a direct extrusion horizontal press machine,
Fig. 10 is a side sectional view of the main part of the press platen, which is the movable platen, and Fig. 11 is the same Fig. 10 A-A.
Although the line sectional view is shown, the press platen 1, which is a movable platen, and the main cylinder frame 9, which is a fixed platen, are connected by a plurality of diagonal columns 8 (a four-column type is shown). ), the main cylinder frame 9 is fixedly fixed on one side of the press bed 2 in an immovable position, and the press platen follows the expansion and contraction of the column 8 on the other side of the bed 2 through the connection of the sliding surfaces 1a and 2a. In the case of direct extrusion, the die 21 is held on the front surface of the press platen 1 via a die holder 22, and the die 21 and the through hole 1b of the platen 1 are in direct communication with each other. As is known in the art, a shear device 23 for cutting lees (discard) is attached to the upper part of the cylinder, and an extrusion force applying mechanism is disposed on the main cylinder frame 9 side. In FIG. 11, the die 21 can move forward and backward in a direction perpendicular to the pressing direction, and the symbol P indicates its cylinder device. Even in the case of this direct extrusion type, the present invention has the advantage that, for the length L ₀ from the end face of the platen to the center of gravity of the total weight W ₀ on the side of the press platen 1, L ₀ <Ls
A supporting member 10 is installed on the bed 2 at a length position of the related value, and a sliding surface 10a is provided on the upper surface of the member 10.
In the case of the illustrated example, a sliding surface 22 corresponding to the sliding surface 10a is provided on the die holder 21 on the front surface of the platen 1.
a to be supported on the sliding surface 10a. In the illustrated example, W ₁ is the weight of the press platen 1, L ₁ is the length from the rear surface of the platen to the center of gravity, W ₂ is the weight of the die 21, L 2 is the length to the center of gravity, and W ₃ is the length of the press platen ₁ to the center of gravity. With the weight of die holder 22
L ₃ is the length to the center of gravity, W ₄ is the weight of the shear device 23, L ₄ is the length to the center of gravity, W ₅
is 1/2 of the total weight of column 8, L ₅ is the length to its center of gravity, L ₆ is the length between the inner sides of main cylinder frame 9 of press platen 1, and L ₇ is Shear device 23 from the front of platen 1
The length to the center of the press platen 1, L ₈ indicates L ₇ 1/4, and L ₉ indicates the thickness of press platen 1, but the total weight W ₀ is measured from the rear surface of the platen to L ₀ as shown in the figure. The center of gravity is located at the length of . Therefore, as shown in the figure, the support member 10 is set and arranged on the bed 2 at a position where the length of L ₀ <Ls, and the corresponding die holder 22 is inserted through the sliding surfaces 22a and 10a. By supporting it so that it can slide, the effects are exactly the same as in the case of the indirect extrusion type, such as preventing the press platen 1 from falling forward and improving and maintaining the press centering precision. Note that the shear device 23 provided in the direct extrusion press is also provided in the indirect extrusion press illustrated in FIGS. 1, 4, and 7, and the weight thereof is also considered as the total weight.

Further, the present invention is similarly applicable to a hydrostatic extrusion press. That is, in the embodiments shown in FIGS. 1 to 11, whether indirectly or directly,
As a horizontal extrusion press, by applying an extrusion force provided on the main cylinder frame side, the billet in the container charged or located between the main cylinder frame and the press platen is transferred to the press platen side via the pressurizing stem. As is well known, in a hydrostatic extrusion press, a hydraulic medium is sealed in a sealed container, and the billet charged in the container is pumped to a high pressure of the sealed hydraulic medium. Together with this, the liquid pressure is used to extrude it toward the die. However, this sealed container, the pressurization mechanism for the enclosed hydraulic medium, etc. are installed on the main cylinder frame that is immovably fixed on one side of the press bed 2, that is, on the fixed platen side, and a die lock mechanism is installed on the movable press platen side. Because of the installation structure, the support member 10 can be easily installed on the press platen 1, which is a movable platen, with a positional relationship of L ₀ <Ls, an example of which is shown in FIGS. 12 and 13. That is, in the illustrated example, 1 is a press platen that is a movable platen, 9 is a main cylinder frame that is a corresponding fixed platen, and the frames 9 of both platens 1 are integrated by a plurality of diagonal columns 8. The main cylinder frame 9 is immovably fixed on one side of the press bed 2, and the press platen 1 has a sliding surface 1a on the other side of the press bed 2 so that it can follow the expansion and contraction of the column 8. , 2a. At this time, on the main cylinder frame 9 side, the main cylinder, a crosshead via the main ram, a pressurizing stem integrated with the crosshead, a sealed container supported by the crosshead into which the stem is inserted, etc. are arranged in a known manner. On the other hand, it is customary for the press platen 1 side to have a die block 24, a hydraulic medium supply device 25 into the sealed container, etc., so that the weight W ₁ of the press platen 1 itself is reduced as shown in the figure. and the length L ₁ from the rear end surface of the platen to its center of gravity, the weight W ₂ of the mounting portion 26 of the die block 24 and the length to its center of gravity.
L ₂ , weight W ₃ of the die block 24 and its length to the center of gravity L ₃ , weight W ₄ of the hydraulic medium supply device 25
and the length L ₄ to its center of gravity, the weight W ₅ which is 1/2 of the total weight of column 8, and the length L ₅ to its center of gravity, the sum of each weight W ₁ to _{W 5} is Since the total weight W ₀ and the length L ₀ to the center of gravity can be determined, the support member 10 is provided at a position on the bed 2 with the length L ₀ <Ls, and with respect to its sliding surface 10a,
In the example shown in the corresponding position, a sliding surface 26a is provided on the mounting portion 26 on the front surface of the press platen 1.
By slidably supporting the sliding surface 26a on the sliding surface 10a, the center of gravity of the total weight W ₀ is located inside the support member 10, and the phenomenon of the press platen 1 falling forward can be similarly prevented. This means that this can be reliably prevented, and the action and effects are equally exhibited as in each of the embodiments shown above.

Furthermore, FIG. 14 shows another embodiment in which the present invention is applied to a hydrostatic extrusion press. Members and components common to those in FIG. A protrusion 1A extending toward the platen is fixed integrally or removably, and the lower sliding surface 4a of the protrusion 1A is fixed to the support 1.
It is supported from below at 0, and this 14th
It is clear that the embodiment shown in the figures can also be applied to the various types of horizontal presses mentioned above.

Further, the support member 10 and the support member for the movable platen 1 may be provided continuously.

The present invention is also applicable to other mechanisms such as horizontal injection molding machines, but the fixed platen and the movable platen are rigidly connected by a column, and the fixed platen is installed in an immovable position on the press bed. In a type in which the movable platen is assembled on the bed via a sliding surface so that it can follow the expansion and contraction of the column, and the press mechanism is distributed on each platen surface, the lower surface of both sides and the lower surface of the center of the movable platen are The movable platen is supported separately, and the support point on the lower surface of the center is located forward of the supporting position of the lower surface of both sides and on the fixed platen side, ahead of the overall center of gravity of the movable platen. It has a three-point support configuration, and slides stably by the amount of extension of the column corresponding to the full force of the press, allowing the movable platen to tilt forward and press in the press mechanism installed on the platen. It effectively prevents fluctuations, deviations, and misalignments of the shaft center, and is extremely useful for improving press precision and product quality. At this time, the position of the center of gravity of all the weight borne by the movable platen and the resulting total weight can be easily calculated, and the support member is set on the bed so that the center of gravity of this total weight is located inward from the support member. Therefore, it is sufficient to slidably support the corresponding movable platen part, which does not complicate the design, and the support member does not interfere with movable members such as advancing and retreating or rotating into unused space on the bed. Since it can be installed in a split arrangement by utilizing positions where it cannot be used, there is no particular difficulty in implementing it.In addition, the assembly structure is accurate and precise, with no distortion or distortion of each part attached to the platen, and it is smooth and trouble-free. It is effective to ensure movement without any friction, and to increase the robustness and durability of the frame itself made of platens and columns.
It is excellent as it can be used for various horizontal presses and similar machines.

[Brief explanation of the drawing]

1 to 9 are main part side cross-sectional arrangement A of an example of application of the present invention apparatus to various indirect extrusion horizontal press machines.
10 and 11 are side cross-sectional views of main parts and front views taken along A-A lines of an example of application of the device of the present invention to a direct extrusion horizontal press machine, and FIGS. 12 and 13 are sectional views taken along lines -A and BB. FIG. 14 is a side cross-sectional side view of the main parts and a front view of an example in which the apparatus is applied to a hydrostatic extrusion press, and FIG. 14 is a side cross-sectional view of the main parts similarly applied to a hydrostatic extrusion press. 1...Press platen, 2...Press bed,
6...Die stem, 8...Column, 10...Supporting member, 10a...Sliding surface, W...Each weight of each member on the press platen side, _W0 ...Total weight, 9...Main cylinder frame.

Claims (1)

[Claims] 1 A fixed platen is supported in an immovable position on one side of the press bed, and a movable platen connected to the fixed platen by a column is supported on the other side so that it can follow the expansion and contraction of the column, and the press mechanism is distributed between both platens. In order to support the movable platen, the lower surfaces of both sides of the movable platen are slidably supported on the press bed, and the movable platen has a protrusion on the fixed platen side or a movable platen. The central portion of the press mechanism parallel to the press axis of the press mechanism disposed on the platen is supported from below, and a support member having a sliding surface for following is provided in front of the both side support portions and the support member The tip of the fixed platen side is located closer to the fixed platen than the overall center of gravity of the total weight consisting of the platen weight in the movable platen, the weight of the press mechanism distributed to the movable platen, and the weight of 1/2 the column. A platen device for horizontal presses that is characterized by: