JPS60225726A - Device for changing mouthpiece of extrusion molding machine - Google Patents

Abstract

PURPOSE:To permit easy and prompt change of a mouthpiece without removing a push member and using excessive molding material by moving a movable plate with plural freely movable mouthpiece parts in the direction crossing a material passage and arranging one of the mouthpieces selectively on the material passage. CONSTITUTION:Freely movably in the direction crossing the inside 6 and the outside supply passage 8 the movable plate 12 is equipped on the fixed plate 5 through the perforating hole 4 and provided with plural mouthpiece parts 13. The piston 28 of the cylinder 22 is moved downward by the motion of the control valve 26 due to a control signal from the controller 25 to move the movable plate 12 downward in the arrow Y direction. Thereby, the lower mouthpiece 13 cuts melting material in the inside material passages 9, 18 and the outside material passages 10, 19 between the movable spider 17 and the fixed spider 11 and arranged in the projecting form under the fixed plate 5.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a die changing device for an extrusion molding machine.

BACKGROUND ART In general, the mouthpiece of an extrusion molding machine, for example, a screw extrusion molding machine, is removably attached to a housing formed at the tip of the nozzle of the extrusion molding machine, and a presser member screw-fitted in front of the mouthpiece of this housing part is used. It is fixedly attached within the housing. For this reason, when replacing the cap, a bath melting material such as rubber or synthetic handle fat is attached to the back surface of the cap, making it impossible to remove the presser member from the accommodating portion and take out the cap. Therefore, it is necessary to extrude the nozzle with the molten material, remove all of the km material in the nozzle, clean the housing, and then attach another nozzle and secure it with a holding member. I spend a lot of time wasting money and exchanging money.

Purpose of the Invention In view of the conventional situation described above, the present invention provides a cap changing device for an extrusion molding machine, which allows the cap to be replaced easily and quickly without removing the presser member, and also eliminates wastage of molding material. The purpose is to provide the following.

Structure of the Invention In order to achieve the above-mentioned object, the present invention includes a head portion having a material passage communicating with a nozzle of an extrusion molding machine, and a plurality of movable parts in the head portion that are movable in a direction intersecting the material passage. a movable plate having a mouthpiece, and a presser member that moves the movable plate and screws one of the mouthpieces in front of the movable plate of the do part to press the peripheral edge of the mouthpiece of the movable plate. and a presser member driving means that rotates the presser member in the normal direction to bring the mouthpiece into close contact with the material passage to lock the movable plate, and rotates the presser member in the reverse direction to unlock the movable plate.

Example Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 to 3, 1 indicates a head part, and a nozzle 2 of one extruder supplies the inner material of the molded product A, for example, the material of the sponge molded part a1, and the outer material of the molded product A, such as solid rubber. A mounting part 3 that connects the nozzle of the other extruder (not shown) that supplies the material of the molding part a2, and this mounting part 3
A movable plate 5, which will be described later, is fixed to the tip of a movable plate 5, and a fixed plate 5 has a rectangular insertion hole 4.In this head part l, an inner supply passage 6 communicating with the one nozzle 2 is connected to the back of the mounting part 3. An outer supply passage 8 is formed from the end to the insertion hole 4 of the identification plate 5, and communicates with the other nozzle via a flange part 7 protruding from the side surface of the mounting part 3.
It is formed from the outside of the front part to the insertion hole 4 of the fixing plate 5. The hole wall of the insertion hole 4 of the fixing plate 5, which is opened to separate the inner supply passage 6 and the outer supply passage 8, has an inner material passage 9 which communicates with the inner supply passage 6 and an outer material passage 9 which communicates with the outer supply passage 8. a fixed side spider 11 having an outer material passage 10;
The hole protrudes slightly from the hole wall surface of the insertion hole 4 and is fitted with a screw.

Reference numeral 12 denotes a movable plate, which is attached to the fixed plate 5 through the insertion hole 4 so as to be movable in a direction intersecting the inner supply passage 6 and the outer supply passage 8. There is. These cap portions 13 have an accommodation hole 14 opened from the body surface of the movable plate 12 in a bottomed shape in front of the front side, and a molded body formed through the accommodation hole 14 with a smaller diameter than the accommodation hole 14 from the bottom surface of the accommodation hole 14 to the front surface of the movable plate 12. a movable spider 17 that abuts and supports the product passage lb and the cap 16 housed in the housing hole 14;
It consists of. The M1lt11 spider 17 is screwed into the accommodation hole 14 so as to slightly protrude from the rear surface of the movable plate 5, and has inner material passages 18 corresponding to the inner material passage 9 and outer material passage 10 of the fixed side spider 11, respectively. and an outer material passage 19. Each of the die holes 16 is formed with a mold hole 20 having a different cross-sectional shape and communicating with the inner material passage 18 of the movable side spider 17.
A communication path 21 communicating with the outer material passage 19 of the movable side spider 17 is formed on the side surface of the movable side spider 17.

Reference numeral 22 indicates a movable plate driving means, specifically a hydraulically driven cylinder, which is installed on the side of the fixed plate 5 in the working direction of the movable plate 12, for example, on the upper surface of the fixed plate 5 in the figure, across the 5Te plate 12. Mounting plate 2: (Fixed on the top, and connected to the upper boat and lower boat of the cylinder 22 by piping 27 via a control valve 26 controlled by a controller 25 for hydraulic pressure a, 24.

Piston 2) of cylinder 22! lr, is not fixed strongly to the upper surface of the movable plate 12 through the mounting plate 23, but is fixed so that it can be moved with a slight play.

Reference numeral 29 denotes a holding member, which is screw-fitted to the front of the movable plate 12 of the fixed plate 5 so as to press the outer periphery of the molded article passage 15 of the movable plate 12, and is larger than the molded article passage 15. A molded article passage 30 having a diameter is formed.

Reference numeral 31 indicates a presser member driving means, specifically a hydraulically driven cylinder, which is rotatably attached via a pin 33 to a support portion 32 protruding from the upper side of the fixed plate 5. The upper boat and the lower boat 31 are also connected to the hydraulic power source 24 via a control valve 34 which is switched and controlled by the controller 2b. The piston 36 of the cylinder 31 is rotatably connected via a pin 38 to a mounting portion 37 protruding from the front surface of the seventh rank portion of the holding member 29.

According to the structure of the above-mentioned embodiment, when replacing the lower mouth part 13 shown in FIG. After stopping the feeding operation of the molten material from the nozzle 2 and the other nozzle and slightly relaxing the pressure of the #-material in the nozzle, the cylinder is opened by the operation of the control valve 34 by the control number d from the controller 25. 3) is moved upward to reversely move the presser member 29 in the direction of arrow X shown in FIG. 1 to loosen the pressing force against the movable plate 12 and release the lock of the movable plate 12.

Thereafter, the piston 28 of the cylinder 22 is moved downward by the operation of the control valve 26 in response to a control signal from the controller 2b, thereby moving the movable plate 12 downward in the direction of arrow Y. In this case, the lower base part 13 is connected to the movable side spider 17 and the fixed side spider 1.
1 and the inner material passage 9. ]8 and outer material passage 10.
The movable side spider 1 of the upper base portion 13 is sheared to protrude below the fixed plate 5.
7 aligns the inner material passage 9.18 and the outer material passage 10.19 with the fixed side spider 11, and stops the downward movement of the piston 28 in response to a control signal from the controller 25. Subsequently, the piston 36 of the cylinder 31 is moved down to release the presser member 29.
is rotated normally in the direction of arrow
The movable side spider 17 is brought into close contact with the stationary side spider 11 to the extent that the molten material does not flow out during extrusion molding between the mating surfaces, and the movable plate 12 is locked with the presser member 29 to drive the piston 36 of the cylinder 31. make it stop. After this cylinder 31 and the cylinder 22 are stopped, the pressure oil of the upper boat and the lower boat of each cylinder 31.22 is locked by the valve body of each control valve 34.26 by a control signal from the controller 25, By operating the extruder to supply the molten material, compression molding of a new cross-sectional shape can be performed.

In the above embodiment, the molded product A is formed by simultaneous overlapping extrusion molding consisting of 6 parts of sponge and a solid outer skin, but the present invention is not limited to this, and the molded product A is formed by single extrusion molding. There is a similar effect even if In the case of this single extrusion molding, either the operation of supplying the molten material of the other extrusion molding machine (not shown) connected to the 7-rank part 7 of the head part 1 is stopped, or the external supply is made in place of the head part l. This can also be done by using a separate head part in which the passages 8, 10 are not formed.

Effects of the Invention As described above, according to the present invention, the lock of the movable plate by the presser member is released without removing the presser member, the movable plate is moved in the direction intersecting the material path, and the molten material is sheared. At the same time, another nozzle can be placed in the material passage, so when changing the nozzle, the molten material in the nozzle is not removed, the nozzle exchange can be completed in a short time, and waste of molten material can be avoided. . In addition, it is possible to replace the nozzle in the nozzle part that is not open for extrusion molding with the nozzle that will be used for the next extrusion molding in advance, saving four steps of the nozzle replacement work. It has an incendiary effect.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing the essential parts of an embodiment of the present invention, Fig. 2 is a sectional view taken along the river-■ line in Fig. 1, and Fig. 3 is an example of a simultaneous overlapping extrusion molded product. FIG. DESCRIPTION OF SYMBOLS 1...Head part, 5...Fixed plate, 6...-Inner supply passage, 8...Outer supply passage, 12.Fist/movable plate, 1
3... e cap part, 14... accommodation hole, 16... cap,
22.31...Cylinder, 28.36.Fist/Piston, 29..Self-extrusion component. Figure 3 1 Figure 1 Figure 2

Claims (1)

[Claims] A head part having a material passage communicating with the nozzle of an extrusion molding machine, a movable plate having a plurality of mouth parts movable in the direction intersecting the material passage in the head part, and a mouth part by moving the movable plate. a movable plate drive means for selectively arranging one of the movable plate parts in the material passage; a presser member screwed into the front part of the movable plate of the head part to press a peripheral edge of the base part of the movable plate; A raccoon extrusion molding machine comprising a presser member driving means that rotates a presser member in the normal direction to bring the mouthpiece into close contact with the material passage and locks the movable plate, and also rotates the presser member in the reverse direction to release the lock of the movable plate. Gold exchange device.