JPH05111908A - Extrusion molding die exchange device - Google Patents

Abstract

(57) [Summary] [Purpose] The split dies can be exchanged very quickly and automatically, the exchange time is shortened and the labor is reduced, and the productivity is improved. [Structure] A die formed by dividing an extrusion passage so as to be opened so as to be able to open legs and a platen for inserting the die therein are provided. The platen into which the split dies are inserted is provided with a gate lock capable of fixing and holding the split dies, and the front end face of the platen is provided with a die lock means for crimping the split dies through a toggle link mechanism. An exchange table that can move in and out of the extrusion line is arranged at the exit of the die, and a die take-out means for moving the split die between the exchange table and the platen is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion molding die exchanging apparatus, and more particularly to an apparatus having a structure suitable for exchanging an extrusion molding die of a material mainly made of a hydraulic inorganic material.

[0002]

2. Description of the Related Art Conventionally, a hydraulic inorganic material such as cement is used as a main raw material and is extruded to form a continuous strip plate shape, which is appropriately sized by a cutting device to be used as a floor panel or a wall panel. It is known to mold the panel material used (JP-A-56-121724). A die used in such an extrusion molding machine gradually narrows the extrusion passage, and at the final exit, a thin rectangular exit corresponding to the cross-sectional size of the panel to be formed is opened.

In an extrusion molding machine equipped with such a die, the extruded material remaining in the die after the completion of the extrusion molding hardens with the passage of time. Therefore, when the extrusion work is not performed for a long time, the extruded material is removed from the die. There is a need to. Therefore, conventionally, when the extrusion work is not performed, the die is removed from the extrusion device, but this is done by removing the die from between the container and the end platen. Then, the extruded material inside the removed die is removed from the extrusion passage by jetting pressurized water or the like, and after cleaning, the die is attached to the molding machine again.

[0004]

However, in the conventional method, there is a problem that the work of removing the die from the extruder is very complicated and requires a lot of manpower and time, resulting in a decrease in the productivity of the extruder. Further, the extruded material clogged in the die needs to be removed by pressurized water, which has a drawback that an auxiliary facility for cleaning becomes large-scale.

Focusing on the above-mentioned conventional problems, the present invention makes it possible to perform die replacement very quickly and automatically, shortens the replacement time, saves manpower, and improves productivity. It is an object of the present invention to provide an extrusion molding die exchanging device capable of performing the above.

[0006]

In order to achieve the above-mentioned object, an extrusion molding die exchanging device according to the present invention has a die in which an extrusion passage is openly divided so as to be able to open legs, and the die is inserted. The platen for inserting the split die is provided with a gate lock capable of fixing and holding the split die, and the die lock surface is crimped to the front end surface of the platen through the toggle link mechanism. Means is provided, an exchange table capable of moving in and out of the extrusion line is arranged at the exit of the die, and die take-out means for moving the split die between the exchange table and the platen is provided. ..

[0007]

According to the above construction, the die is inserted in the platen and fixedly held by the gate lock mechanism and the die lock mechanism. At the time of replacement, these locking mechanisms may be removed, the dice may be pulled out and transferred toward the replacement table that has moved to the front part of the platen, and the table may be traversed and removed from the line. Since the dice are divided so that the legs can be opened,
Extruded material stuck inside can be easily removed by the leg opening operation of the die and can be cleaned very easily. The cleaned die is placed on the exchange table again and moved to the extrusion line, the take-out means is reversely operated to insert the die into the platen, and the die lock and the gate lock are clamped and fixed. By such an operation, the dies are exchanged and attached / detached extremely quickly, and the dies are automated, so that the production efficiency of the extrusion molding operation can be significantly improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the extrusion die exchange device according to the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show the essential structure of an extrusion molding machine equipped with a die exchanging device according to an embodiment. As shown in these drawings, the extruder includes a container 10 to which a hydraulic inorganic material such as cement is supplied, and an end platen 12 is installed facing the container 10. The end platen 12 has a die insertion hole 14 in the container 10
It penetrates concentrically with the material loading hole 16 and the panel molding die 18 is fixedly held in the inserted state. The die 18 has a length larger than the width dimension of the end platen 12, and has a rear end protruding from the end platen 12 to be partly fitted and joined to the container 10 and a front end also protruding from the end platen 12 to form a die outlet. It is exposed to the outside.

The die 18 attached as described above has an extrusion passage 20 formed at the center thereof.
Is a passage that is initially enlarged at the joint with the container 10, but is basically tapered so that the passage height gradually decreases in the extrusion direction, and finally the panel cross section of the molding target is formed. It is opened in a thin rectangular shape corresponding to.
Such a die 18 is formed from a die head 22 in which an enlarged extrusion passage is formed on the joining side to the container 10 and a main die 24 in which a reduction extrusion passage is formed.
In addition, the main die 24 is composed of a pair of split dies 24U and 24D that are horizontally split vertically along the extrusion passage 20, and each of the split dies 24U and 24D is pivotally attached to the die head 22 and centered on a pivot pin. It is formed so that it can be opened by rotating.

By the way, in order to fix and hold such a die 18 to the end platen 12, the end platen 1
A gate lock device 26 is incorporated in the device 2. As shown in FIG. 3, the gate lock device 26 has a pair of upper and lower lock rings 28U and 28D formed in a semicircular shape, which are slidably guided by the side columns of the fixed frame 30. The die 18 is attached so that it can be sandwiched from above and below. The inverted U-shaped upper lock ring 28U and the U-shaped lower lock ring 28D are suspended by independent gate-shaped frames 32U and 32D, but especially the gate-shaped supporting the upper lock ring 28U. Frame 32U
An elevating cylinder device 34 is connected to the top plate portion of the fixed frame 30, and the expansion / contraction drive of the elevating cylinder device 34 drives the upper lock ring 28U up and down. The pillars of the gate-shaped frames 32U and 32D are parallel to each other, and rack teeth are engraved on the opposing surfaces thereof. The pinion 36 is arranged between the columns of the double-gate frame so as to mesh with the rack teeth, and the pair of double-frames 32U and 32D can be moved up and down in opposite directions by the pinion 36. Therefore, by driving the elevating cylinder device 34, the upper lock ring 28U and the lower lock ring 28D are driven toward or away from each other. As a result, the lock rings 28U, 28D
The dies 18 are tightened and held when they are close to each other, and the dies 18 can be freely moved in and out of the insertion hole 14 by releasing the lock by releasing them. Lock rings 28U and 28D on the die 18 side
Is formed with a ring groove 38 into which the lock ring 2 can be fitted.
The dies 18 are positioned and fixedly held by fitting them at the time of tightening 8U and 28D.

When the lock rings 28U and 28D of the gate lock device 26 lock the die 18,
A pressure ring 70 that presses the die 18 toward the container 10 via the lock rings 28U and 28D is provided on the end platen 12. This is configured to pressurize by hydraulic drive, and prevents the die 18 from moving during extrusion.

Further, on the front end surface of the end platen 12,
A die lock device 40 having a toggle link mechanism is provided to crimp the die 18 toward the divided surface side. This is, as shown in FIG. 1, divided dies 24U, 2
A pair of upper and lower parts is provided so as to press the outer surface of each 4D. Explaining the upper die lock 40, a cylinder device 42 capable of expanding and contracting in a direction parallel to the extrusion center is attached to the outer peripheral surface of the end platen 12, and the front end face of the end platen 12 is provided directly above the die insertion hole 14. A lever 44 pivotally supported is attached. The tip of the lever 44 is connected to the cylinder device 42, so that the tip of the lever 44 can be driven to swing along the pushing direction. Further, a slider 46 capable of sliding on the front end surface of the end platen 12 is attached so as to be able to press the outer surface of the die 18 by being guided by an appropriate guide, and a connecting link 48 for connecting to the lever 44 is attached to the slider 46. Pin-coupled. These constitute a parallel slider link mechanism, and in particular, by setting the connecting point of the connecting link 48 and the lever 44 to be close to the lever fixing pin and to be set far from the cylinder connecting pin side, 44 to increase the rotation moment, and the slider 46
The toggle link mechanism that exerts a large pressing force on 8 is configured. Such a configuration is the same in the lower die lock device as well, and the same numbers are given to the same configurations and the description thereof is omitted.

The die 18 inserted through the inside of the end platen 12 having the above-described structure is fixedly held inside the platen by the gate lock device 26 and the die lock device 40, and can be removed from the end platen 12 by releasing the lock. There is. In order to take out the unlocked die 18 from the platen and replace the die 18, a die exchange table 50 that can move in a direction orthogonal to the extrusion line is disposed immediately downstream of the end platen 12. The table 50 is mounted so as to be capable of traversing along a rail 54 laid on a base 52, and is driven in and out of an extrusion line by a traverse cylinder 56 mounted between the rails 54. A die engaging metal fitting 60 is attached to the table 50 so as to be slidably movable in the longitudinal direction of the table by penetrating a pair of guide rods 58, and a screw rod 62 is further threaded through the die engaging metal fitting 60. The screw rod 62 can be rotatably driven by a motor 64 attached to the lower surface of the table 50, so that the die engaging fitting 60 can be moved back and forth on the table 50. Dice engaging bracket 6
No. 0 is formed so that only the engaging projection 60A projects on the surface of the table 50. On the other hand, an engaging groove 66 orthogonal to the extrusion line is formed on the lower surface of the lower split die 24D of the die 18, so that the engaging protrusion 60A can be engaged and disengaged when the table 50 traverses. There is.

On the side of the table 50 which moves transversely, there is provided a roller conveyor 68 which traverses integrally with the table 50. The roller conveyor 68 is arranged on the line when the table 50 enters the extrusion line for die changing work. When the table 50 is moved to the side and comes out to the side of the line, it enters the extrusion line and conveys the extruded product.

The work of exchanging the die 18 by the extrusion molding die exchanging device thus constructed is carried out as follows. First, in the work of taking out the die 18, the die exchange table 50 is moved to the press center by driving the traverse cylinder 56. At this time, the die engagement fitting 60 is located on the end platen 12 side, so that the engagement protrusion 60 A is fitted into the engagement groove 66 of the die 18. Next, the elevating cylinder device 34 of the gate lock device 26 is extended to expand the upper and lower lock rings 28U and 28D, and the cylinder device 42 of the die lock device 40 is extended to separate the pressing slider 46 from the die 18. As a result, the die 18 is freed from the end platen 12 and can be pulled out. Therefore, the motor 64 of the exchange table 50 is driven to rotate the screw rod 62,
By moving the die engaging member 60 in the extrusion direction, the die 18 is transferred onto the table 50 and taken out. Then, the exchange table 50 is moved in the off-line direction to complete the removal.

The taken-out die 18 is transferred to, for example, a cleaning process, in which the split dies 24U and 24D are opened to remove the raw materials adhering to the inside and perform cleaning work.

The attachment work of the die 18 may be carried out in the reverse process of the above-mentioned taking out, and the die 18 is replaced by the exchange table 50.
Place the table on the table and move the table laterally toward the press center. Then, the screw rod 62 is rotated to advance the die engagement fitting 60 to the platen 12 side, and the die 18 is loaded into the die insertion hole 16. After the loaded die 18 is fixed and held by the locking operation of the gate lock device 26 and the die lock device 40, the exchange table 5
0 is moved in the offline direction, and the table 50
The roller conveyor 68 attached to is moved to the extrusion line to wait for the product to be carried out.

According to such an embodiment, even when the extrusion molding die has a divided structure, the replacement work can be performed quickly and automatically, and the replacement time can be shortened and the labor can be saved. Can be achieved. As a result, the operating time of the extruder can be extended and the productivity can be greatly improved. In particular, even with the split die structure, since the split surface is clamped and fixed by the die lock device having the toggle link mechanism, it is not necessary to attach a tightening bolt for preventing the die from opening in advance. Be done.

[0020]

As described above, the extrusion molding die exchanging device according to the present invention has the die which is formed by dividing the extrusion passage so as to be openable and which can be opened, and the platen for inserting the die. , The platen into which the split die is inserted is provided with a gate lock capable of fixing and holding the split die, and the platen front end face is provided with a die lock means for crimping the die split face via a toggle link mechanism. An exchange table that can move in and out of the extrusion line is arranged at the outlet of the, and a die take-out means for moving the split die between the exchange table and the platen is provided, so the split die can be replaced very quickly and automatically. It is possible to shorten the replacement time, save labor, and improve productivity.

[Brief description of drawings]

FIG. 1 is a side sectional view of an extrusion molding die exchanging device according to an embodiment.

FIG. 2 is a plan sectional view of FIG.

FIG. 3 is a front view of a gate lock device.

[Explanation of symbols]

 10 Container 12 End Platen 14 Die Loading Hole 18 Panel Molding Die 20 Extrusion Passage 26 Gate Lock Device 28U, 28D Lock Ring 34 Elevating Cylinder Device 40 Die Lock Device 42 Cylinder Device 46 Slider 50 Die Exchange Table 56 Traverse Cylinder 60 Dice Engagement Fitting 64 motor 68 roller conveyor 70 pressure ring

Claims (1)

[Claims] 1. A die having an extrusion passage openly divided so as to be able to open legs and a platen for inserting the die, and the platen for inserting the divided die can hold the divided die fixedly. In addition to the gate lock, a die lock means is provided on the front end surface of the platen for crimping the die dividing surface through a toggle link mechanism, and at the exit of the die, an exchange table that can move in and out of the extrusion line is arranged. An extrusion molding die exchanging device comprising a die take-out means for moving the divided die between the exchanging table and the platen.