JP2005161669A - Molding machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding machine capable of being enhanced in reliability and certainty with respect to the mold on-off operation of a mold on-off mechanism. <P>SOLUTION: The mold on-off mechanism 6 is equipped with the cam lock 20 supported on a movable template 12 in a shakable manner, a slide lock 25 movable between a locking position locked with the cam lock 20 to connect the movable template 12 and a fixed template 15 and an unlocking position releasing the locking with the cam lock 20 to bring the movable template 12 and the fixed template 15 to an unconnected state and a release bar 26 for moving the slide lock 25 to the unlocking position accompanied by mold opening operation and moving the slide lock 25 to the locking position when the movable template 12 and the fixed template 15 are clamped accompanied by mold clamping operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a molding machine provided with a mold opening / closing mechanism that opens molds in a predetermined order.

For example, in a molding machine in which a resin molded product such as an electronic component is injection-molded, a pinpoint mold is generally used. As shown in FIGS. 17A to 17D, this pinpoint mold has a movable side mold plate 50 provided with a fixed side mold plate 51 in which a gate communicating with the cavity is formed. The mold plate 51 has a structure in which a runner stripper plate 52 in which a supply passage for supplying a molding material to a cavity is formed through a gate is disposed. In this mold, in order of mold opening, first, the mold is opened between the fixed mold 51 and the runner stripper plate 52, and then the mold is opened between the fixed mold 51 and the movable mold 50. A mold opening / closing mechanism may be provided.

As such a mold opening / closing mechanism, the lock member 53 is rotatably supported by the movable side mold plate 50 and is urged in the lock direction by the spring 54 so that the lock member 53 is locked to the fixed side plate 51. There is a structure in which a member 55 is fixed and a release lever 56 for releasing the lock of the lock member 53 is fixed to the runner stripper plate 52 (see, for example, Patent Document 1).

In the mold opening / closing mechanism, when the movable side mold plate 50 starts the mold opening operation from the mold closed state, the lock member 53 locks to the fixed member 55 and moves the fixed side mold plate 51 together with the movable side mold plate 50, Accordingly, the space between the fixed side mold plate 51 and the runner stripper plate 52 is opened (see FIGS. 17A and 17B). When the movable side template 50 is further opened, the release lever 56 rotates the lock member 53 upward to release the lock with the fixed member 55. As a result, the mold is opened between the fixed mold 51 and the movable mold 50 (see FIGS. 17C and 17D).

On the other hand, when the mold closing operation is performed, the lock member 53 hits the fixing member 55 and the fixed side mold plate 51 is stopped while the release lever 56 pushes up the lock member 53. Thereafter, the fixed side mold plate 51 and the runner are stopped. A mold closing operation is started between the stripper plate 52 and the fixed side mold plate 51 and the movable side mold plate 50 are closed before the both 51 and 52 are closed.
JP 2000-20882 A

By the way, in the above conventional mold, as shown in FIGS. 18A and 18B, when the locking member 53 hits the fixing member 55 in the middle of the mold closing operation, and the stationary side mold plate 51 is temporarily stopped, Thereafter, the mold closing operation of the fixed-side template 51 may not be performed smoothly. For this reason, the fixed side mold plate 51 and the runner stripper plate 52 are closed first in a state in which the space between the fixed side and movable side mold plates 51 and 50 is opened, for example, by t. There is a concern that the cavity and insert parts may be damaged, and there is a concern that the reliability of the mold opening / closing mechanism for the mold opening / closing operation is inferior.

In general, when the space between the movable side mold plate 50 and the fixed side mold plate 51 is closed, the mold closing speed is made as slow as possible in order to avoid the influence on the cavity and insert parts, and the other mold plates are made fast. Like to do. In such a case, if the runner stripper plate 52 is first closed as described above, the mold closing speed of the movable side mold plate 50 increases accordingly, and the mold may be damaged.

The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a molding machine capable of improving the reliability and certainty with respect to the mold opening / closing operation of the mold opening / closing mechanism.

The invention according to claim 1 is a mold having a fixed mold member, a movable mold member having a movable mold plate and an intermediate plate, and the movable mold plate and the intermediate plate when the mold is opened. In a molding machine provided with a mold opening / closing mechanism that opens a mold between plates and then opens a mold between the fixed mold plate and the movable mold plate, the mold opening / closing mechanism includes the movable mold A cam lock supported by a plate in a swingable manner, a lock position supported by the fixed mold plate and engaged with the cam lock to connect the movable mold plate and the fixed mold plate to each other. A slide lock that is movable between an unlocking position that releases the joint and disconnects the movable side mold plate and the fixed side mold plate, and unlocks the slide lock in accordance with the mold opening operation of the mold. The movable side mold plate and the fixed side mold plate are moved along with the mold closing operation. With mold closing is characterized in that it comprises a release bar to move the slide lock in the locked position.

According to a second aspect of the present invention, in the first aspect of the present invention, a cavity is formed in an opposing portion of the movable side mold plate and the fixed side mold plate, and a gate communicating with the cavity is formed in the movable side mold plate. The intermediate plate is formed with a molding material supply passage for supplying the molding material to the cavity through the gate.

In the mold opening / closing mechanism according to the first aspect of the present invention, when the mold is closed, the cam lock is engaged with the slide lock, and the movable side mold plate is connected to the fixed side mold plate. The mold is opened first between the movable side mold plate and the intermediate plate. With the mold opening operation at this time, the release bar moves the slide lock to the unlock position side, so that the engagement with the cam lock is released, and the movable side mold plate and the fixed side mold plate are disconnected. A mold opens between the fixed side mold plate and the movable side template.

When the movable side mold plate starts the mold closing operation from the mold open state, and when the movable side mold plate and the fixed side mold plate are closed, the release bar moves the slide lock to the lock position side, so that the slide lock is cam-locked. Are engaged, and then the fixed side mold plate and the intermediate plate are closed.

As described above, according to the present invention, the slide lock is moved to the unlock position with the mold opening operation of the mold, and the slide lock is locked when the movable side mold plate and the fixed side mold plate are closed with the mold closing operation. Since it is moved to the position, it is possible to prevent the cam lock from contacting the slide lock and interfering during the mold closing operation. As a result, the movable side mold plate and the fixed side mold plate can be reliably closed without applying a load, and the reliability of the mold opening / closing mechanism for the mold opening / closing operation can be improved.

According to the second aspect of the present invention, a cavity is formed in the facing portion between the movable side mold plate and the fixed side mold plate, a gate communicating with the cavity is formed on the movable side mold plate, and the molding material is placed on the intermediate plate with the gate. Since the molding material supply passage to be supplied to the cavity is formed, the molded product and the runner can be separated and the molded product can be reliably taken out.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIGS. 1 to 16 are views for explaining a molding machine according to an embodiment of the present invention. FIGS. 1 and 2 are schematic configuration diagrams of a molding machine having a mold, and FIGS. 5A, 5B to 8A, 8B are diagrams showing the structure of the mold opening / closing mechanism and the mold opening operation, and FIGS. 16 (a) and 16 (b) are diagrams showing the mold closing operation of the mold opening / closing mechanism. 5B to 16B are views seen in the direction of the arrow X.

In the figure, reference numeral 1 denotes a molding machine in which an insert molded product A such as an electronic component is injection molded. The molding machine 1 mainly has a mold 5 provided with a movable mold member 3 and a fixed mold member 4 on a fixed base 2, and the mold 5 is molded under the fixed base 2. A mold driving unit (not shown) that opens and closes between the opening position and the mold closing position is disposed, and the mold 5 is controlled to open and close in a predetermined order in accordance with the opening and closing operation of the mold driving unit. An opening / closing mechanism 6 is provided.

The movable mold member 3 is configured by arranging a runner stripper plate 13 and a nozzle touch plate 14 as intermediate plates on a movable mold 12. The fixed mold member 4 includes a fixed plate 17 disposed on the fixed base 2, an ejector plate 16 disposed on the fixed plate 17, and a fixed mold plate 15 disposed above the ejector plate 16. Configured.

Cavities 5a and 5a are formed at the opposed portions of the fixed mold plate 15 and the movable mold plate 12, and gates 12a and 12a communicating with the cavity 5a are formed on the movable mold plate 12. Each of the gates 12a communicates with a supply passage 12b formed on the upper surface of the movable side template 12.

The nozzle touch plate 14 is provided with a sprue bush 18 having a sprue 18a. The sprue 18a of the sprue bush 18 is inserted into the runner stripper plate 13 and communicated with the supply passage 12b. A supply nozzle 19 for supplying a molding material is connected to the sprue bush 18.

A hoop 10 for conveying the insert molded product A is disposed between the movable side template 12 and the fixed side template 15, and the hoop 10 is supported by the left and right guides 11 so as to be movable in the conveying direction B. Has been. By intermittently moving the hoop 10 in the conveying direction B, the insert molded product A is taken out and the next molded part is fed into the cavity 5a.

Ejector pins 16a, 16a are fixed to the ejector plate 16, and each ejector pin 16a is disposed at a position facing the cavity 5a through the stationary side template 15. The ejector plate 16 is raised in conjunction with the mold opening operation of the movable side mold plate 12, the ejector pin 16a is protruded from the upper surface of the fixed side mold plate 15, and the insert molded product A is pushed up by the ejector pin 16a. Separated from the template 15. Further, the ejector plate 16 descends in conjunction with the mold closing operation of the movable side mold plate 12, and the ejector pin 16a is immersed in the fixed side mold plate 15.

The molding process of the insert molded product A by the mold 5 will be described. As shown in FIGS. 3 and 4, when the fixed side mold plate 15, the movable side plate 12, the runner stripper plate 13, and the nozzle touch plate 14 are closed, molten molding material is injected from the supply nozzle 19 and sprue. 18a, the supply passage 12b, and each gate 12a are supplied into the cavities 5a and 5a. In this state, the insert molding product A is molded by holding for a predetermined time required for solidification of the molding material.

When this molding process is completed, the mold 5 starts the mold opening operation. First, the runner stripper plate 13 rises together with the nozzle touch plate 14 to open the mold between the movable side mold plate 12 and the runner stripper plate 13. By this mold opening operation, the insert molded product A is separated by the gates 12a and 12a. Subsequently, the movable mold 12, the runner stripper plate 13, and the nozzle touch plate 14 are raised to open the mold with the fixed mold 15, and the hoop 10 is pushed up by the ejector pins 16 a to be separated from the fixed mold 15. The hoop 10 is conveyed in the B direction. In synchronization with this, the runner C is separated from the supply nozzle 19 by opening the mold between the runner stripper plate 13 and the nozzle touch plate 14.

The mold opening / closing mechanism 6 opens the mold first between the movable side mold plate 12 and the runner stripper plate 13 when the mold 5 is opened, and then the movable side mold plate 12 and the fixed side mold plate 15. The mold is opened, the mold is closed first between the fixed mold 15 and the movable mold 12, and then the mold between the movable mold 12 and the runner stripper plate 13 is closed. Specifically, it has the following structure.

An L-shaped cam lock 20 is supported on the movable side template 12 through a support shaft 21 so as to be swingable. The cam lock 20 is urged by a compression spring 22 in the locking direction. A hook portion 20 a is formed at the lower end portion of the cam lock 20.

A slide block 23 is fixed to the fixed side template 15. The slide block 23 is formed so that a guide hole 23a extending in the mold opening / closing direction (vertical direction) and a slide hole 23b extending in a direction perpendicular to the mold opening / closing direction (horizontal direction) intersect.

A slide lock 25 is inserted into the slide hole 23b of the slide block 23 so as to be movable in a direction perpendicular to the mold opening / closing direction. The slide lock 25 is formed with an engagement hole 25a communicating with the guide hole 23a, and an inclined surface 25b is formed at the tip. When the lower surface of the cam lock 20 comes into contact with the inclined surface 25b due to some trouble when the mold is closed, the inclined surface 25b can interfere with the slide lock 25 by rotating the cam lock 20 in the counter-biasing direction (clockwise in the drawing). It is for avoidance.

The slide lock 25 protrudes from the slide block 23 to be engaged with the hook portion 20a of the cam lock 20 and an unlock position is inserted into the slide block 23 to release the engagement with the cam lock 20. Move back and forth between. As a result, the movable mold plate 12 and the fixed mold plate 15 are connected to each other at the locked position, and the movable mold plate 12 is prevented from rising. Further, at the unlock position, the movable side template 12 and the fixed side template 15 are disconnected and the movable side template 12 is raised.

A release bar 26 is disposed on the nozzle touch plate 14. The release bar 26 has a structure in which a guide portion 26b is formed on an attachment portion 26a fixed to the nozzle touch plate 14 by bolting. The guide portion 26b is formed by the guide hole 23a of the slide block 23 and the cam lock 25. It extends downward through the engagement hole 25a. The guide portion 26b includes an upper non-engaging portion 26c extending vertically downward from the mounting portion 26a, an inclined portion 26d extending obliquely downward from the lower end of the upper non-engaging portion 26c, and a lower end of the inclined portion 26d. And a lower non-engaging portion 26e extending vertically downward.

When the mold is closed, the upper non-engaging portion 26c is engaged with the slide lock 25 to hold the slide lock 25 in the locked position. When the nozzle touch plate 14 is raised in accordance with the mold opening operation, the release bar 26 is inclined. When the portion 26d engages with the slide lock 25 and moves the slide lock 25 to the unlock position side, and the nozzle touch plate 14 further rises, the lower engagement portion 26e engages with the slide lock 25 and the slide lock 25 is configured to be held in the unlocked position. Here, as shown in FIG. 8B, the dimension a of the upper non-engaging portion 26c of the release bar 26 is set as appropriate for the mold opening timing of the movable side mold plate 12 with the fixed side template 15. Can be adjusted.

In the mold opening / closing mechanism 6, the slide lock 25 is engaged with the cam lock 20 when the mold is closed (see FIGS. 5A and 5B). When mold opening is started from this mold closed state, the runner stripper plate 13 is first lifted together with the nozzle touch plate 14, and the movable mold plate 12 and the runner stripper plate 13 are opened as the nozzle touch plate 14 is lifted ( (Refer to Drawing 6 (a) and (b)). Thereby, the insert molded product A is cut off by the gate 12a. Here, even if the runner stripper plate 13 is raised, the movable side mold plate 12 is connected to the fixed side mold plate 15 via the cam lock 20 and the slide lock 25, and the gap between the two 12 and 15 does not open.

When the nozzle touch plate 14 rises from this state, the release bar 26 retracts the slide lock 25 in the unlocking direction, and when the nozzle touch plate 14 further rises, the slide lock 25 retracts to the unlock position, and the cam lock 20 Is disengaged (see FIGS. 7A and 7B). As a result, the connection between the movable side template 12 and the fixed side template 15 is released, the movable side template 12 rises, and the mold is opened between the fixed side template 15. As a result, the insert molded product A is separated and transported from the fixed-side mold plate 15, and the runner stripper plate 13 and the nozzle touch plate 14 are opened in synchronization with this, and the runner C is separated and discharged. The In this way, the mold opening operation is completed (see FIGS. 8A and 8B).

In the mold open state, the slide lock 25 stands by at the unlock position (see FIGS. 9A and 9B). When the mold closing operation starts from this state, the movable side mold plate 12 first descends and comes into contact with the fixed side mold plate 12 (see FIGS. 10 (a), (b) to 12 (a), (b)). . Since the slide lock 25 stands by at the unlock position when the movable side template 12 is performing the mold closing operation, the cam lock 20 does not contact or interfere with the slide lock 25. Therefore, the mold can be closed smoothly without applying an extra load.

Here, the mold closing speed of the movable side mold plate 12 is set slower than the mold closing speed of the nozzle touch plate 14. By doing so, the cavity forming space can be accurately maintained. In general, precise irregularities corresponding to the molded product are formed in the cavity. Therefore, if the mold closing speed is increased, the irregularities may be damaged. In the case of insert molding, it is desirable to make the mold closing speed of the movable side mold plate 12 as slow as possible from the viewpoint of preventing damage to the insert member. In the case of the above-described conventional mold operation, if the normal mold closing speed is set, the mold between the movable side and the fixed side mold plate is closed at high speed, which may damage the cavity and the insert member. is there. Further, if the mold closing speed is set assuming the operation of the conventional mold, it is necessary to set all of them to a low speed, and this causes an extension of the molding cycle.

On the other hand, following the mold closing operation of the movable side mold plate 12, the nozzle touch plate 14 is lowered, and when the movable side mold plate 12 is closed, the release bar 26 advances the slide lock 25 toward the lock position. When the nozzle touch plate 14 is further lowered, the slide lock 25 is engaged with the cam lock 20, and the movable side and fixed side mold plates 12 and 15 are connected (FIGS. 13A, 13B and 14A). , (B)). As the nozzle touch plate 14 is lowered, the runner stripper plate 13 comes into contact with the movable side mold plate 12, and then the nozzle touch plate 14 comes into contact with the runner stripper plate 13 to complete the mold closing operation (FIG. 15 ( a), (b) and FIGS. 16A, 16B).

Here, when the nozzle touch plate 14 first performs the mold closing operation due to, for example, a sliding failure of the movable side mold plate 12, the cam lock 20 hits the slide lock 25. It rotates in the direction opposite to the locking direction along the inclined surface 25b of the lock 25, so that it engages without interfering with the slide lock 25.

According to the mold opening / closing mechanism 6 of the present embodiment, the cam lock 20 supported by the movable mold 12 so as to be swingable and the slide block 23 fixed to the fixed mold 15 are supported by the cam lock 20. A slide lock 25 movable between a lock position for engaging and connecting the movable side and fixed side mold plates 12 and 15 and an unlock position for releasing the engagement with the cam lock 20 and disengaging the cam lock 20; The slide lock 25 is moved to the unlock position with the mold opening operation, and the release bar 26 is moved to the lock position when the movable side mold plate 12 and the fixed side mold plate 15 are closed with the mold closing operation. As a result, the cam lock 20 can be prevented from coming into contact with the slide lock 25 and interfering with each other during the mold closing operation, and the movable side mold plate 12 and the fixed side mold plate 15 can be reliably closed without applying a load. Let It can, reliability of the mold closing operation, it is possible to increase the certainty. As a result, damage to the mold 5 can be prevented, and the insert molded product A and the runner C can be separated from each other and the insert molded product A can be taken out reliably.

In the above-described embodiment, the vertical type mold that opens and closes in the vertical direction has been described as an example. However, the present invention can also be applied to a horizontal type mold that opens and closes in the horizontal direction.

In the above embodiment, the case where an insert molded product is manufactured has been described as an example. However, the present invention is not limited to this, and the present invention can also be applied to the case of normal single product molding that is not an insert.

It is a schematic block diagram of the molding machine provided with the metal mold | die by one Embodiment of this invention. It is a schematic block diagram of the said molding machine. It is sectional drawing of the mold closed state of the said metal mold | die. It is sectional drawing of the mold open state of the said metal mold | die. It is a figure which shows the structure and mold opening operation | movement of the metal mold | die opening / closing mechanism of the said metal mold | die. It is a figure which shows the mold opening operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold opening operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold opening operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the mold closing operation | movement of the said metal mold | die opening / closing mechanism. It is a figure which shows the conventional general metal mold | die opening / closing mechanism. It is a figure which shows the conventional metal mold | die opening / closing mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molding machine 5 Mold 5a Cavity 6 Mold opening / closing mechanism 12 Movable side mold plate 12a Gate 13 Ranna stripper plate (intermediate plate)
15 Fixed side template 20 Cam lock 25 Slide lock 26 Release bar

Claims (2)

A mold having a stationary mold member, a movable mold member having a movable mold plate and an intermediate plate, and a mold opening between the movable mold plate and the intermediate plate when the mold is opened. Then, in a molding machine including a mold opening / closing mechanism for opening a mold between the fixed side mold plate and the movable side mold plate, the mold opening / closing mechanism is swingably supported by the movable side mold plate. The cam lock is supported by the fixed side mold plate and engaged with the cam lock to connect the movable side mold plate and the fixed side mold plate. A slide lock that can be moved between an unlock position for disconnecting the side mold plate and the fixed side mold plate, and the slide lock is moved to the unlock position in accordance with the mold opening operation of the mold. When the movable mold plate and the fixed mold plate close with the closing operation, Molding machine characterized by comprising a release bar to move to the lock position-locked. 2. The cavity according to claim 1, wherein a cavity is formed at an opposing portion of the movable side mold plate and the fixed side mold plate, a gate communicating with the cavity is formed on the movable side mold plate, and the intermediate plate is molded. A molding material supply passage for supplying a material to a cavity through the gate is formed.

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