JP3291078B2 - Die set suspension of molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding machine using a die set mold, and more particularly to a die set suspension device for connecting a die set mold portion to an upper ram that moves up and down.

[0002]

2. Description of the Related Art In this type of molding machine, the static accuracy of the molding machine itself is reduced, the elastic deformation of the main body frame during the molding operation, the dynamic accuracy of the movable portion of the molding machine is reduced, and various parts of the molding machine over time. In order to prevent the eccentric load from being applied to the die set mold part from the upper ram part side during the molding operation,
It is known that a die set suspension device having a free joint structure is provided between an upper ram portion and a die set mold portion, and the eccentric load is absorbed by connecting the die set suspension device to the upper ram portion. The structure shown in FIG. 4 is a conventional example of a die set suspension device using fitting of a spherical body, in which an upper plate 1 having a convex spherical portion 1A is fixed to an upper ram portion 2 of a molding machine, and the convex spherical portion 1A is formed. The lower plate 3 having the concave spherical surface portion 3 </ b> A that is slidably fitted to the upper surface is fixed to the upper portion of the die set mold portion 4. A retainer 5 that engages with the convex spherical portion 1A of the upper plate 1 is fixed to the upper surface of the lower plate 3, whereby the upper plate 1
And the lower plate 3 are integrated in the vertical direction. Since the upper and lower plates 1 and 3 are relatively rotatable in any direction about the center of the convex spherical portion 1A, the misalignment angle between the upper ram portion 2 and the die set mold portion 4 is determined by the relative angle between the upper and lower plates 1 and 3. Absorbed by rotation.

FIG. 5 shows an example in which a shaft member 6 composed of a large diameter head 6A having a convex spherical surface 7 at the end and a small diameter neck 6B, and a flat plate member contacting the convex spherical surface 7 at the distal end of the shaft member 6 are shown. 8 and a retainer 9 fixed to the flat plate member 8 and restraining the large-diameter head 6A of the shaft member 6 with a play gap.
Are fixed to the upper ram portion 2 of the molding machine and to the flat plate member 8 or the die set mold portion 4, respectively. In this example, since the retainer 9 has play spaces in the front, rear, left and right with respect to the shaft member 6, it is possible to absorb the misalignment angle and the misalignment amount.

[0004]

In a conventional molding machine, the connection structure between the upper ram portion and the die set mold portion by the die set suspension device generally has a small load capacity, and a misalignment amount and a center in any direction. The function of absorbing the shift angle was not sufficient in structure. For example, in the structure shown in FIG. 4, although the misalignment angle can be absorbed by the relative rotation of the concave and convex spherical portion about the center, the misalignment amount cannot be absorbed, and the connecting portion between the convex spherical portion 1A and the upper plate 1 and the lower portion can be absorbed. The strength of the retainer 5 on the plate 3 side is weak, so that a large load during the molding operation cannot be received.

The structure shown in FIG. 5 can absorb the misalignment angle and misalignment amount by increasing the play space between the shaft member 6 on the upper ram portion 2 side and the retainer 9 on the die set mold portion side. Since the force transmission during the molding operation is performed through the contact between the convex spherical surface and the flat surface, there is a problem that the force transmission area is extremely small and can be applied only to a small molding machine.

It is an object of the present invention to provide a die set suspension apparatus for a molding machine having sufficient rigidity and load carrying capacity, and capable of exhibiting an effective absorption function for both misalignment angles and misalignments. is there.

[0007]

According to the present invention, the vertically moving member is disposed between the vertically moving member on the molding machine main body side and the die set mold portion and the die set mold portion is suspended. In a die set suspension of a molding machine connected to a member,
An intermediate plate is interposed with a gap between the upper and lower plates connected by a spring member, and between the upper and lower plates and the intermediate plate, cylindrical rods orthogonal to each other on a stepped flat surface are in contact with each other. An arranged die set suspension is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a die set suspension device for a molding machine according to an embodiment of the present invention. FIG. 2 is a side view of the die set suspension device viewed from the Y-axis direction in FIG.
FIG. 2 is a side view of the die set suspension device viewed from the X-axis direction in FIG. 1. The apparatus includes an upper plate 11 fixed to the upper ram portion 2 that moves up and down by bolting or the like, a lower plate 12 bolted to the die set mold portion 4,
An intermediate plate 13 is provided between the upper and lower plates 11 and 12. On the opposing surfaces of the upper plate 11 and the intermediate plate 13, substantially semicircular grooves 14 and 15 extending in the Y-axis direction are formed to face each other.
A Y-axis cylindrical rod 16 having the same curvature is inserted into 15. Here, the depth of the double concave grooves 14 and 15 is the cylindrical rod 16
Therefore, a certain gap δZ ₁ is formed between the upper plate 11 and the intermediate plate 13. Similarly, on the opposing surfaces of the intermediate plate 13 and the lower plate 12, substantially semicircular grooves 17 and 18 extending in the X-axis direction are formed to face each other, and the grooves 17 and 18 have the same curvature as the grooves. An X-axis cylindrical rod 19 is inserted. Groove 1
The depth of 7, 18 is slightly smaller than the radius of the cylindrical rod 19, so that a gap δZ ₂ is formed between the intermediate plate 13 and the lower plate 12.

As shown in FIG. 2 and FIG.
The Y-axis cylindrical rod 16 between 1 and the intermediate plate 13 is fixed to the intermediate plate 13 by bolts 20 from the upper part of the rod 16, and the X-axis cylindrical rod 19 between the intermediate plate 13 and the lower plate 12 is likewise a rod. It is fixed to the intermediate plate 13 by tightening bolts 21 from the lower side. The Y-axis and X-axis cylindrical rods 16 and 19 are arranged at substantially the center of the lateral width corresponding to the upper and lower and middle plates 11, 12, and 13, respectively.

C-shaped rings 22 and 23 are attached to the outer periphery of both ends of each of the cylindrical rods 16 and 19 for preventing the rods from coming off. Here, a gap δY is provided on both sides between the C-shaped rings 22 at both ends of the Y-axis cylindrical rod 16 and the side surface of the upper plate 11.
Is formed. Similarly, C at both ends of the X-axis cylindrical rod 19
A gap δX is formed on both sides between the shaped ring 23 and the side surface of the lower plate 12. Due to these gaps, the upper plate 11 can move in one direction in the Y-axis direction with respect to the intermediate plate 13 by a gap δY, and the lower plate 12 can move in one direction in the X-axis direction with respect to the intermediate plate 13 by a gap δX. Can be moved. As a result, the upper plate 11 can move relative to the lower plate 12 by a maximum of 2δY and 2δX in the Y-axis direction and the X-axis direction, respectively.

With the Y-axis and X-axis cylindrical rods 16 and 19 inserted so as to be orthogonal to each other on a stepped plane as described above, the upper plate 11 and the lower plate 12 are Is connected by a connecting spring 25 via a hook 24 at the side of the connector.

The transmission of force in the die set suspension of the present embodiment is carried out between the upper and lower plates 11, 12 and the intermediate plate 13 via the upper half side and the lower half side of each cylindrical rod 16, 19. Will be For example, the rolling force of the upper ram portion 2 during the forming operation is transmitted from the upper plate 11 to the intermediate plate 13 via the Y-axis cylindrical rod 16, and further, the lower plate 12 and the die set mold via the X-axis cylindrical rod 19. The information is transmitted to the unit 4. Since the load is received on the side surfaces of the upper and lower halves of the cylindrical rods 16 and 19, that is, the side areas of the entire circumference, the load transmission area can be increased, and the present invention is also applicable to a large-sized machine in which a large rolling force acts. it can.

The displacement of the line of force due to the static or dynamic precision failure of the molding machine, for example, the misalignment angle around the Y axis, is determined by the relative sliding rotation between the Y axis cylindrical rod 16 and the upper plate 11. Is absorbed by the gap δZ ₁ between the shaft and the intermediate plate 13. Similarly, the misalignment angle around the X axis is
9 and the lower plate 12 rotate the intermediate plate 1
It is absorbed by the gap δZ ₂ between the lower plate 3 and the lower plate 12.

The amount of misalignment in the Y-axis direction is, as described above, within the range of the gap δY between the C-shaped ring 22 of the Y-axis cylindrical rod 16 and the side surface of the upper plate 11. Is absorbed by moving relative to. Similarly, the amount of misalignment in the X-axis direction is determined by the X-axis cylindrical rod 1
9 between the C-shaped ring 23 and the side surface of the lower plate 12
When the lower plate 12 moves relative to the X-axis cylindrical rod 19 in the range of X, the lower plate 12 is absorbed. Therefore, for example, when the parallelism between the upper ram part of the molding machine and the die set mold part is deviated due to the pressing reaction force during the molding operation, or when the backlash of each part occurs due to aging. Also, an eccentric load is prevented from being applied to the die set mold part, thereby preventing adverse effects such as deterioration in quality of a molded product and a shortened life of the die set mold part.

[0015]

As described above, according to the present invention, it is possible to effectively reduce the misalignment angle and the misalignment amount of the operating portion, which may cause an eccentric load, even if there is an accuracy defect of each part due to the molding machine itself. It can be absorbed and precision molding becomes possible. Since it is not necessary to maintain the accuracy of the molding machine itself, the cost of the molding machine is reduced, and the molding machine can be easily attached to an existing molding machine. Since the eccentric load and the torsional load do not act on the die set mold portion by interposing the die set suspension device, the life of the mold portion can be extended. Compared with the conventional one, it has a higher structural rigidity and a larger transmission area of the rolling force at the time of the molding operation, so that there are advantages such as being applicable to various molding machines from small to large.

[Brief description of the drawings]

FIG. 1 is a perspective view of a die set suspension device for a molding machine according to an embodiment of the present invention.

FIG. 2 is a side view of the die set suspension device viewed from a Y-axis direction in FIG.

FIG. 3 is a side view of the die set suspension device viewed from the X-axis direction in FIG.

FIG. 4 is a side cross-sectional view of a conventional die set suspension device using fitting of an uneven spherical body.

FIG. 5 is a side sectional view of a die set suspension device according to another conventional example.

[Explanation of symbols]

 2 Upper ram part 4 Die set mold part 11 Upper plate 12 Lower plate 13 Intermediate plate 16 Y-axis cylindrical rod 19 X-axis cylindrical rod 20, 21 Bolt 22, 23 C-shaped ring 24 Hook 25 Connection spring

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B30B 15/02 B21D 37/14

Claims (1)

(57) [Claims] 1. A die set suspension of a molding machine which is disposed between a vertically moving member on a molding machine main body side and a die set mold portion and suspends the die set mold portion and connects the die set mold portion to the vertically movable member. In the device, an intermediate plate is interposed with a gap between the upper and lower plates connected by a spring member, and between the upper and lower plates and the intermediate plate, cylindrical rods orthogonal to each other on a stepped flat surface are provided. A die set suspension device which is arranged in a contact state.