JP2006082444A - Exchange apparatus for insert die of injection molding die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique that allows, in exchanging an insert die of an injection molding die, the work to be done easily and certainly. <P>SOLUTION: The apparatus is equipped with: an input axis which receives an input for changing the tightening of the bolt which fixes the insert die which forms a part of the molding surface of an injection molding die and is assembled removably inside the die; an output axis which transmits the input for the input axis to the bolt; a transmitting means which links the input axis and the output axis and transmits the input for the input axis to the output axis; a casing portion which, surrounding the transmitting means in which the input axis and the output axis are linked, is formed so that it can be incorporated in the die; and an engaging part which, being installed in the casing portion, secures the casing portion in the die. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for exchanging a nested mold used for a mold in injection molding.

  In general, as an injection mold, for example, a mold in which a cavity of a mold is formed into a shape of a molded product is known. As another injection mold, for example, an insert mold is inserted into a cavity to mold a complicated shape.

  The injection mold as described above is formed by a fixed mold and a movable mold. In addition, a product insert in which a nested mold is embedded is embedded in the movable mold. This nesting mold is fixed to the mold with inserted bolts. The nesting die can be exchanged with another nesting die corresponding to the shape of the molded product by removing it from the movable die by tightening or loosening bolts.

  By the way, when the insert mold of the injection mold is replaced, for example, the following method has been used. First, as the above-described method, there is a method of exchanging the insert mold after removing the injection mold from the injection molding machine. As another method, there is a method in which only the insert mold is replaced while the injection mold is attached to the injection molding machine. Of these methods, the latter method is widely used in the injection molding technology because the replacement of the nested mold is easier than the former method.

In addition, as a prior art relevant to this invention, there exists a technique disclosed by the following patent documents 1 and 2, for example.
JP-A-8-090603 Japanese Patent No. 3319342

  However, the conventional insert mold replacement technique in the injection mold has the following problems, for example.

  That is, in the technique of Patent Document 1, it is necessary to remove the bolt that fixes the nesting mold and replace the nesting mold, and to perform the work with the replacement bolt. For this reason, the technique disclosed in Patent Document 1 requires a long time for the operation because the replacement of the nested type becomes complicated.

  Moreover, in the technique of patent document 2, an extrusion pin, a fixing pin, a locking member, and the like are provided in a nested mold. For this reason, the technique of patent document 2 had more component parts than the conventional injection mold. Therefore, in the technique of Patent Document 2, the volume occupied by the components for nesting exchange with respect to the mold has been increased.

  As described above, the replacement technology for the nested mold in the conventional injection mold can be replaced without removing the injection mold from the injection molding machine, but the ease of the replacement is considered. Was hard to say. In addition, the conventional replacement technique of the insert mold in the injection mold has various restrictions when it is incorporated in an actual mold because its constituent elements are enlarged.

  The present invention has been made in view of the above matters. That is, the subject is providing the technique which can work easily and reliably in the insert mold | type exchange of an injection mold. Another object of the present invention is to provide an insert mold exchanging technique for an injection mold with a structure that can be easily incorporated into a mold.

  In order to solve the above problems, the present invention employs the following means.

  That is, the present invention provides an input shaft that receives an input for changing the tightening of a bolt that forms a part of a molding surface in an injection mold and fixes a nested mold that is removably incorporated in the mold. An output shaft for transmitting an input to the input shaft to the bolt, a transmission means for connecting the input shaft and the output shaft, a transmission means for transmitting the input to the input shaft to the output shaft, and a transmission means for connecting the input shaft and the output shaft. A casing portion that is enclosed and formed so as to be able to be incorporated into the mold, and an engagement portion that is provided in the casing portion and engages the casing portion in the mold.

  According to the present invention, a nested mold incorporated in an injection mold can be attached and detached from the mold via an input shaft drawn out of the injection mold, a transmission means, and an output shaft.

  Therefore, according to the present invention, it is possible to provide a technique capable of easily and surely performing the insert replacement operation of the injection mold.

  Moreover, this invention forms integrally by enclosing the structure which can move the above-mentioned nested type | mold above in a metal mold | die so that replacement | exchange is possible. And this invention is equipped with the engaging part which can engage the casing part comprised in this way with respect to the inside of a metal mold | die easily.

  Therefore, according to the present invention, it is possible to provide a technology capable of nesting replacement of an injection mold with a configuration that can be easily incorporated into the mold.

  Moreover, you may comprise this invention so that a transmission means may transmit the input from an input shaft to an output shaft by rotational movement using a gear mechanism.

  Further, the present invention may be configured such that the transmission means transmits the input by changing the axial directions of the input shaft and the output shaft.

  In the present invention, the engaging portion may be a bolt hole.

  Furthermore, as for this invention, a casing part may be formed using steel materials.

  As described above, according to the present invention, it is possible to provide a technique capable of easily and reliably performing an operation for changing the insert of an injection mold. Further, according to the present invention, a technology capable of changing the insert mold of the injection mold can be provided with a configuration that can be easily incorporated into the mold.

  The best mode for carrying out the present invention will be described below with reference to the drawings. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of the embodiment.

<Configuration of injection mold>
FIG. 1 is a side sectional view showing an example of the configuration of an injection mold 1 incorporating a nested mold exchanging apparatus according to an embodiment of the present invention.

  The injection mold 1 includes a fixed mold plate 3 attached to a fixed mold attachment plate 2 and a movable mold plate 5 attached to a movable mold attachment plate 4. A product insert 6 is embedded in the surface of the movable mold 5 facing the fixed mold 3. Further, a nested mold 7 is embedded in the product insert 6. The insert mold 7 is fixed to the product insert 6 by a bolt 9 that is tightened from a screw hole 8 provided below the movable mold plate 5 (on the movable mount plate 4 side). By loosening the tightened bolt 9, the nesting die 7 is released from the fixed state from the product nesting 6 and the movable die 5. That is, the nesting die 7 can be replaced with another nesting die (not shown). Then, the bolt 9 operates the nesting mold exchanging device 20 incorporated in the movable mold plate 5 so that the nesting mold 7 can be detached from the product nesting 6 without disassembling the mold.

<Configuration of nested exchange device>
FIG. 2 is a side view showing the configuration of the nested exchange apparatus 20 according to the present embodiment. FIG. 3 is a top view showing the configuration of the nested exchange apparatus 20 according to the present embodiment.
According to FIGS. 2 and 3, the nested exchange device 20 includes an output shaft 21, an input shaft 22, a transmission means 23, a casing 24, and an engaging portion 25.

  The output shaft 21 and the input shaft 22 are connected so as to be able to transmit the mutual rotation via a transmission means 23 inside the casing 24. Further, the output shaft 21 and the input shaft 22 extend in directions away from the transmission means 23. The axis centers of the output shaft 21 and the input shaft 22 are at positions that intersect at right angles via the transmission means 23.

  The output shaft 21 is at a position concentric with the bolt 9 that fixes the insert mold 7. Further, the output shaft 21 is configured such that an end extending from the casing 24 is connected to the bolt 9 so as to be integrally rotatable. The input shaft 22 receives an input from a driving handle (not shown). The input shaft 22 transmits the received input to the output shaft 21 side.

  The transmission means 23 transmits the rotation input in the axial direction from the input shaft 22 to the output shaft 21 as described above. It is conceivable to use a mechanism that can change the axial direction and transmit the rotational movement of the shaft. That is, as the transmission means 23, for example, a bevel gear mechanism or a worm mechanism may be used.

  The casing 24 encloses the casing 24 including the output shaft 21 and the input shaft 22 connected to each other by the transmission means 23. From the casing 24, a part protruding from the connecting portion of the output shaft 21 and the input shaft 22 protrudes. With this casing 24, all the components of the nested exchange device 20 are integrally formed. Therefore, since all of the constituent elements of the nested exchange device 20 are gathered in a small size, it is easy to incorporate into the mold.

  The engaging portion 25 is formed as four engaging portions 25 a, b, c, and d outside the casing 24. The engaging portion 25 is formed as a bolt hole for engaging with the movable mold plate 5 on the mold side.

<Example of nested replacement work>
Next, an example of the replacement work of the nested mold 7 by the nested mold exchanging device 20 will be described.
FIG. 4 is a side cross-sectional view showing a state before the nesting die 7 is replaced by the nesting die exchanging device 20 (a state where the nesting die 7 is fixed to the product nesting 6). FIG. 5 is a side cross-sectional view showing a state when the nesting die 7 is replaced by the nesting die exchanging device 20 (a state where the nesting die 7 is unfixed from the product nesting 6).

  In FIG. 4, the input shaft 22 is rotated by the drive handle 26 attached to the outer shaft end portion of the input shaft 22 of the nested exchange device 20. Input to the input shaft 22 is transmitted to the output shaft 21 via the transmission means 23, and the output shaft 21 rotates. As the output shaft 21 rotates, the bolt 9 connected to the output shaft 21 rotates in a direction in which the bolt 9 is detached from the insert mold 7.

  The bolt 9 is loosened from the screw hole 8 by the rotation of the bolt 9. As a result, the fixed relationship between the product insert 6 and the insert mold 7 is also solved. Then, the insert mold 7 that has been unfixed with the product insert 6 is detachable from the recess 6a of the product insert 6 as shown in FIG. At this time, for example, the nesting die 7 replaces, for example, the nesting die 7a inserted into the recess 6a with another nesting die 7b.

  When the drive handle 26 is rotated in the direction opposite to that at the time of removal of the nested mold 7 after the replacement operation of the nested mold 7, the output shaft 21 and the bolt 9 are tightened via the input shaft 22 and the transmission means 23. Rotate in the direction to fix. If the bolt 9 is continuously tightened as it is, the insert mold 7 and the product insert 6 are fixed to the movable mold plate 5 by the bolt 9.

<Modification>
The nested exchange apparatus 20 according to the present embodiment is not limited to the above-described configuration, and can be configured as follows, for example.

  In the above embodiment, the insert mold 7 is mounted in the recess 6 a provided in the product insert 6 on the movable mold plate 5. For example, the insert mold 7 is mounted in the recess provided in the movable mold plate 5. May be. Further, the recess for mounting the insert mold 7 may be provided on the fixed mold plate 3 side. Further, a recess for mounting the product insert 6 may be provided on the fixed mold plate 3 side, and the insert mold 7 may be mounted in the recess provided in the product insert 6.

  In the above embodiment, the nesting exchanging device 20 transmits the rotation of the drive handle 26 to the bolt 9 via the output shaft 21, the transmission means 23, and the input shaft 22. However, the present invention is not limited to this. It is only necessary that the output shaft 21 attached to 9 can be rotated using some driving means. As the drive means, for example, an arbitrary drive mechanism such as a motor may be used.

<Effects of the present embodiment>
According to the nested exchange device 20 according to the present embodiment, for example, the following effects can be obtained.

  According to the nested mold exchanging device 20, when the mold for injection molding is replaced, the nested mold can be fixed and the fixed state can be easily and reliably removed without disassembling the mold or the like. . For this reason, according to the nested exchange apparatus 20, the working time of nested exchange can be shortened.

  Further, according to the nested mold exchanging device 20, the operation interruption time of the injection molding machine at the time of the nested replacement can be shortened. For this reason, according to the nested mold exchanging device 20, since the decrease in the cylinder temperature and the mold temperature is suppressed, the yield and quality of the molded product can be improved. Therefore, according to the nested exchange device 20, industrial waste is reduced, which can greatly contribute to the improvement of the natural environment.

  Further, according to the nested mold exchanging device 20, the components for performing the nested replacement are integrated together by the casing 24, so that the work such as processing into the mold when being incorporated into the mold can be reduced. it can. For this reason, according to the nested mold exchanging device 20, it is possible to facilitate the incorporation into the mold.

  Further, according to the nested mold exchanging device 20, the components are integrated together as described above, so that even when a failure or the like occurs in the mechanism for exchanging the nested mold, the mold is used as it is. Thus, only the exchange device can be replaced. Therefore, according to the nesting type exchange apparatus 20, it is possible to reduce the cost and work time for maintenance and the like of the entire apparatus.

  Further, according to the nested exchange device 20, the casing 24 is provided with an engaging portion 25 for attachment to the movable mold plate 5. Therefore, for example, compared with the case where the apparatus main body and the mounting bracket are separated, the configuration of the entire apparatus including the mounting portion can be consolidated in a small size. Moreover, compared with said case, the intensity | strength of the whole apparatus can be raised by uniting a casing and an attaching part.

It is a sectional side view which shows an example of a structure of the injection mold which incorporated the nested type | mold exchange apparatus which concerns on one embodiment of this invention. It is a side view which shows the structure of the nested type | mold exchange apparatus which concerns on this Embodiment. It is a top view which shows the structure of the nested type | mold exchange apparatus which concerns on this Embodiment. It is a sectional side view which shows the state (state where the nesting type was fixed to the product nesting) before the nesting type by the nesting type exchanging device. It is a sectional side view which shows the state at the time of replacement | exchange of a nested type by the nested type exchange apparatus (state where the nested type is released from the product nested state).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Injection mold 2 Fixed mold mounting plate 3 Fixed mold plate 4 Movable mold mounting plate 5 Movable mold plate 6 Product insert 6a Recess 7 Nest die 8 Screw hole 9 Bolt 20 Nest die changer 20 Child changer 21 Output shaft 22 Input shaft 23 Transmission means 24 Casing 25 Engagement portion 26 Drive handle

Claims (5)

An input shaft that receives an input for changing the tightening of a bolt that forms a part of a molding surface in the mold for injection molding and that is removably incorporated in the mold and fixes a nested mold;
An output shaft for transmitting an input to the input shaft to the bolt;
A transmission means for connecting the input shaft and the output shaft, and transmitting an input to the input shaft to the output shaft;
A casing portion that surrounds the transmission means to which the input shaft and the output shaft are coupled, and is formed so as to be incorporated into the mold;
A nesting die exchanging device for an injection mold, provided with an engaging portion that is provided in the casing portion and engages the casing portion in the mold. The transmission means
The nested mold exchanging apparatus for an injection mold according to claim 1, wherein an input from the input shaft is transmitted to the output shaft by a rotational motion using a gear mechanism. The transmission means
The nested mold exchanging apparatus for an injection mold according to claim 1, wherein input is transmitted by changing an axial direction of the input shaft and the output shaft. The engaging portion is
The nested die changer for an injection mold according to claim 1, which is a bolt hole. The casing portion is
The nesting type | mold exchange apparatus for injection molds of Claim 1 formed using steel materials.

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