JPH05138638A - Extrusion molding die - Google Patents

Abstract

PURPOSE:To conserve the cleaning labor of a die and to shorten a cleaning time by dividing a die molding a hydraulic inorg. material into a plate shape by extrusion molding into a main die and a die head along an extruding direction and horizontally dividing the main die so as to make the same openable and closable. CONSTITUTION:An extrusion molding machine is equipped with a container receiving the supply of a hydraulic inorg. material. A die 18 is formed from a die head 22 having an expanded extrusion passage formed thereto on the connection side to the container and a main die 24 having a contracted extrusion passage formed thereto. Further, the main die 24 is constituted of a pair of divided dies 24U, 24D divided up and down along an extrusion passage 20 and both dies are pivotally mounted on the die head 24. The die 18 is attached to a cleaning device to open the main die 24 and, in this state, the raw material bonded to the interior of the die is removed to perform cleaning work.

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, and more particularly, to an extrusion molding die that facilitates cleaning of a material whose main raw material is a hydraulic inorganic material remaining in the extrusion molding die during extrusion molding. It's about dice.

[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, which is appropriately sized by a cutting device.
It is known to mold panel materials used as floor panel and wall panel (Japanese Patent Laid-Open No. 56-121724).
Publication). A die used in such an extrusion molding machine gradually forms an extrusion passage, and a thin rectangular outlet corresponding to the sectional size of the panel to be formed is opened at the final exit.

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, after extruding the extruded material inside the removed die from the extruding passage by jetting pressurized water, etc., after cleaning,
The die is reattached to the molding machine.

[0004]

However, the conventional method has a drawback that the extruded material clogged in the die needs to be removed by pressurized water, which requires a large amount of auxiliary equipment for cleaning.

It is an object of the present invention to provide an extrusion molding die, which pays attention to the above-mentioned problems of the prior art, and which can reduce the cleaning time while saving labor for cleaning the die.

[0006]

In order to achieve the above object, an extrusion molding die according to the present invention is a die for extruding a hydraulic inorganic material into a plate shape, the die being a main die along the extrusion direction. The main die is horizontally divided along the extrusion surface, and each of the horizontally divided dies is pivotally attached to the die head so that the main die can be opened and closed.

[0007]

According to the above construction, the extruded material remaining in the extrusion passage of the die is attached to the die cleaning device. At this time, the ring groove of the die is fitted to the protrusion of the upper frame portion of the die cleaning device with the die head side facing upward and the main die side facing downward. Next, a cylindrical member 93d that constitutes a part of the extruder is inserted into the straight body circular hole of the die, and when the plate portion is in contact with the end of the die head, pressure oil is supplied to and discharged from the cylinder. The end of the die head is tapped to apply vibration to the die. Thus, the extruded material remaining in the extrusion passage of the die is dropped and accumulated in the receiver, and the die body is reused.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of an extrusion molding die exchanging 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 figures, the extruder comprises 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. A die insertion hole 14 is penetrated through the end platen 12 concentrically with the material loading hole 16 of the container 10, and a panel molding die 18 is inserted and fixedly held in the end platen 12. 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 into the container 10 to be joined thereto, 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 in this manner has an extrusion passage 20 formed through the center thereof.
Has an enlarged passage initially at the joint to 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 composed of a die head 22 having an enlarged extrusion passage formed on the side of joining to the container 10 and a main die 24 having a reduced extrusion passage formed therein. Is composed of a pair of split dies 24U and 24D that are horizontally split vertically along each other. Each of the split dies 24U and 24D is pivotally attached to the die head 22 and can be opened by rotating about a pivot pin. Has been formed.

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 hung from independent gate-shaped frames 32U and 32D, respectively, 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 upper and lower lock rings 28U are moved up and down by the expansion and contraction drive thereof. Further, the columns of the gate-shaped frames 32U and 32D are parallel to each other, and rack teeth are engraved on their opposing surfaces. A pinion 36 is arranged between the columns of the double-gate frame so as to mesh with both rack teeth, and the pair of double-frames 32U and 32D can be moved up and down in opposite directions. Therefore, by driving the lifting 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, when the lock rings 28U and 28D come close to each other, the die 18 is clamped and held, and when the lock rings 28U and 28D are separated from each other, the die 18 is unlocked so that the die 18 can freely move in and out of the insertion hole 14. A ring groove 38 into which the lock rings 28U and 28D can be fitted is formed on the die 18 side.
The dies 18 are positioned and fixedly held by fitting the U and 28D when they are attached.

When the lock rings 28U and 28D of the gate lock device 26 lock the die 18,
The end platen 12 is provided with a pressure ring 70 that presses the die 18 toward the container 10 via the lock rings 28U and 28D. 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, there is provided a die lock device 40 having a toggle link mechanism for crimping the die 18 toward the divided surface thereof. This is as shown in FIG.
A pair of upper and lower is provided so as to press the outer surface of each of U and 24D. Explaining the upper die lock 40, a cylinder device 42 that can expand and contract in the direction parallel to the extrusion center is attached to the outer peripheral surface of the end platen 12, and the front end surface of the end platen 12 is directly above the die insertion hole 14. A lever 44 pivotally supported is attached. The tip end of the lever 44 is connected to the cylinder device 42, so that the tip end 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 close to the lever fixing pin, and setting them so as to be far from the cylinder connecting pin side, The rotation moment of 44 is increased, and the toggle link mechanism in which the pressing force of the slider 46 on the die 18 is large is configured. Such a configuration is the same in the lower die lock device, and the same components are designated by the same reference numerals and description thereof will be omitted.

The die 18 inserted through the inside of the end platen 12 having the above structure is fixed and 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 and replace the unlocked die 18 from the platen, a die exchange table 50 that can move in a direction orthogonal to the extrusion line is arranged 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 locks 58, and a screw rod 62 is further screwed 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, in the die 18, an engaging groove 66 is formed on the lower surface of the lower split die 24D so as to be orthogonal to the extrusion line so that the engaging protrusion 60A can be engaged and disengaged when the table 50 traverses. There is.

A roller conveyor 68 which is integrally traversed with the table 50 is provided at a side portion of the table 50 which traverses the table 50. The roller conveyor 68 is arranged on the line when the table 50 enters an extrusion line for a die changing operation. 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.

Next, FIG. 5 is a side sectional view of the die cleaning device. After the die 18 is once drawn out on the die exchange table 50, it is attached to a die cleaning device 90 for cleaning the die 18 shown in FIG. Die cleaning device 90
Is composed of an upper mount 91, a lower mount 92 and an extruder 93. The lower pedestal 92 forms the base of the die cleaning device 90, and an upper pedestal 91 is placed on the lower pedestal 92 in the same manner as the lower pedestal 92 with the same axis, and is further extruded on the upper pedestal 91. The machine 93 is mounted so as to be located on the same axis as the lower mount 92. Lower mount 9
2 has a rectangular shape when viewed from above, and 3
One side is surrounded by an upper frame portion 92a in a U shape, and only the front surface portion is open. Also, the panel forming die 18 can be set on the upper frame portion 92a for cleaning.
A protrusion 92b is provided so that it can be fitted into the ring groove 38 of the panel molding die 18.

An extruder 93 is vertically arranged above the upper mount 91, and the extruder 93 is fixed to the upper mount 91 by bolts 94 so that it cannot move. Cylinder 93a
The end portion of the die head 22 is attached to the tip of the rod 93b.
A circular plate portion 93c that abuts a is fixed. Further, a cylindrical member 93d having a diameter smaller than that of the straight body circular hole 22b of the die head 22 is fixed to the lower end surface (opposite to the rod 93b) of the plate portion 93c. Dice 18 mentioned above
With the die head 22 side facing upward and the main die 24 side facing downward.
When it is attached to 0, the main die 24 pivotally attached to the die head 22 rotates about the pivot pin, and the main die 24 is opened in a V shape.

The work of exchanging the die 18 by the extrusion molding die exchanging device thus constructed is carried out as follows. First, in taking out the die 18, the traverse cylinder 56 is driven to move the die exchange table 50 to the press center. At this time, the die engagement fitting 60 is located on the end platen 12 side so that the engagement projection 6
0A is fitted into the engagement groove 66 of the die 18. Then,
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. This frees the die 18 from the end platen 12,
Withdrawal is possible. Then, by driving the motor 64 of the exchange table 50 to rotate the screw rod 62 and move the die abutment metal fitting 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 divided dies 24U and 24D are opened to remove the raw materials adhering to the inside and perform cleaning work. That is, the die 18 is attached to the die cleaning device 90.
The ring groove 38 of the die 18 and the projection 92b of the upper frame portion are fitted to the front surface of the upper frame portion 92a, and the die head 22 is set upward so as not to be movable by a positioning member (not shown). To do. Then, the rod 93b of the extruder 93 waiting at the backward limit position is extended while descending to insert the columnar member 93d into the straight body circular hole 22b of the die 18, and the plate portion 93c is inserted into the end of the die head 22. It contacts the portion 22a.

As described above, the main die 24 is open in a V shape when it is set in the die cleaning device 90 with the die head 22 side facing upward. In this state, the pressure oil is supplied to and discharged from the cylinder 93a to move the rod 93b up and down. At this time, the columnar member 93d reciprocates up and down while sliding in the straight body circular hole 22b, and the plate portion 93c intermittently taps the die head end portion 22a for a certain period of time to vibrate the die 18, thereby causing the die 18 to vibrate. Extruded material 81 remaining in the extrusion passage 20 of 18
Fall into the receiver 80. When the extruded material 81 is removed, the rod 93b is retracted to the retracted limit, and the fitting state between the columnar member 93d and the straight body circular hole 22b is released. In this way, the ring groove 38 of the die 18 is left as it is until it is reused, with the ring groove 38 fitted in the protrusion 92b of the upper frame portion.

The work of attaching the die 18 may be carried out in the reverse step. That is, when reusing the die 18,
After removing the die 18 from the die cleaning device 90, the die 18 is placed on the exchange table 50 and the table is moved laterally to the press center side. 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. A gate lock device 26 is installed in the loaded die 18.
After the die lock device 40 is locked and held by the die lock device 40, the exchange table 50 is pulled in and moved in the offline direction, the roller conveyor 68 attached to the table 50 is moved to the extrusion line, and the product is unloaded.

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 die can be easily installed in the guith cleaning device. It can be detached and attached, and the extruded material remaining in the die can be removed simply by tapping with an extruder, which shortens the replacement time and saves labor. As a result, the operating time of the extruder is extended and the productivity can be greatly improved. In particular, even with a split die structure,
Since the dividing surface is tightened and fixed by the die lock device having the toggle link mechanism, there is an advantage that it is not necessary to previously attach a tightening bolt for preventing the die from opening.

[0023]

As is clear from the above description,
According to the present invention, in a die for extruding a hydraulic inorganic material into a plate shape, the die is divided into a main die and a die head along the extrusion direction, and the main die is horizontally divided along the extrusion surface. By pivotally attaching each of the horizontal split dies to the die head, the main die can be opened and closed, so that the extruded material remaining in the die can be removed very quickly and easily. It is possible to achieve the effect of improving productivity by shortening the work time and saving labor.

[Brief description of drawings]

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

FIG. 2 is a plan sectional view of FIG.

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

FIG. 4 is a side sectional view of a die.

FIG. 5 is a side sectional view of the die cleaning 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 80 Receiver 81 Extruded Material 90 Die Cleaning Device 91 Upper Frame 92 Lower Frame 93 Extruder

Claims (1)

[Claims] 1. In a die for extrusion-molding a hydraulic inorganic material into a plate shape, the die is divided into a main die and a die head along the extrusion direction, and the main die is divided horizontally along the extrusion surface, An extrusion molding die, wherein the main die can be opened and closed by pivotally connecting each of the split dies to the above-mentioned die head.