JPH09262836A - Mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily open a plurality of core molds of which the mold opening and closing directions cross each other and to dispense with the processing of the interiors of them. SOLUTION: In a mold wherein a first core mold 3 opened and closed in the direction almost crossing a mold opening and closing direction at a right angle and second core molds 4, 5 opened and closed in the mold opening and closing direction are provided between a fixed mold and a movable mold, the shaft part 80 revolved by the movement of the movable mold is pivotally supported and the first means opening the first core mold 3 by the revolving movement of the shaft part 80 and the second means opening the second core molds 4, 5 are provided to the shaft part 80. Since the core molds are opened and closed by utilizing the movement of the movable mold, the number of processes is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die having a plurality of plate-shaped core dies, for example, a mold opening mechanism for a molding die having a plurality of core dies whose mold opening / closing directions intersect with each other. Regarding INDUSTRIAL APPLICABILITY The molding die of the present invention is used for so-called joint molding, in which a separately formed molded body is placed and molded.

[0002]

2. Description of the Related Art For example, in order to manufacture a weather strip used for a window of an automobile, a straight line portion is formed by extrusion molding, and two extruded products are arranged in an end portion of a die and injection molded. A general method is to form an integrated bent weatherstrip by molding a corner portion by a transfer method or a transfer molding method.

By the way, the weather strip generally has a complicated cross-sectional shape. Therefore, the mold structure for molding the corner portion also has a complicated structure, and in addition to the upper mold and the lower mold, usually a plurality of plate-shaped core molds are arranged between both molds.
Therefore, in the case of mold opening, after opening the upper mold and the lower mold, the plurality of core molds must be sequentially removed, and in the case of mold closing, the reverse procedure must be performed, which is a complicated work. Therefore, the current situation is that it is done manually.

Therefore, for example, in Japanese Unexamined Patent Publication No. 56-129117, a core opening / closing pin and a core opening / closing lever are provided in a fixed mold so that a plurality of core molds can be opened by using an ejector mechanism of a molding machine. A mold is disclosed. That is, according to the molding die of the above publication, a core opening / closing pin having a plurality of step portions rises in the lower die after the upper die and the lower die are opened, and the step portions press the core die to form a plurality of The core mold can be pushed up in sequence and the mold can be opened. Further, the core opening / closing lever is swung by pressing the push-up pin or the like, so that the core mold can be pushed up to open the mold. Therefore, by using this mold, it is possible to automate the opening of multiple core molds.
The number of steps can be reduced.

[0005]

However, in the molding die disclosed in the above publication, the opening and closing directions of the plurality of core dies are basically restricted to the same opening and closing directions of the upper die and the lower die.
For example, it is difficult to open the slide core with the mechanism disclosed in the above publication. Further, since the opening / closing mechanism of the core mold is provided in the lower mold, there is a problem that the lower mold needs to be processed and the cost of manufacturing the mold becomes extremely large.

The present invention has been made in view of the above circumstances, and it is possible to easily open a plurality of core molds whose mold opening and closing directions intersect with each other without manual work, and to open and close the core mold. The purpose is to eliminate the processing inside the mold by externally attaching.

[0007]

The feature of the molding die of the present invention for solving the above-mentioned problems is that it moves between a fixed die fixed to a base and a movable die in a direction substantially orthogonal to the die opening / closing direction. In a molding die having a first core die that is opened and closed and a second core die that is opened and closed by moving in a die opening and closing direction, a shaft portion that pivots by the movement of the movable die is pivotally mounted on the base. First means supported by the shaft portion to engage the first core die to open the first core die by the rotational movement of the shaft portion; and shafts engaged with the second core die. And a second means for opening the second core mold by the rotational movement of the part.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In the molding die of the present invention, when the movable die is opened from the fixed die when the die is opened, the shaft portion is rotated around its axis. The rotation of the shaft portion may be performed manually, but it is preferable to use movable movement of various types using various link mechanisms. When the shaft portion rotates, the first means engages with the first core mold to move the first core mold in a direction substantially orthogonal to the mold opening / closing direction, whereby the first core mold is moved to the mold. Be opened. As the first means, one that can convert the rotational movement of the shaft portion into a linear movement in a direction substantially orthogonal to the movable opening / closing direction can be used, and various link mechanisms can be used.

Further, due to the rotation of the shaft portion, the second means engages with the second core die and lifts the second core die in a direction substantially parallel to the opening / closing direction of the movable die. Is opened. As the second means, one that can convert the rotational movement of the shaft portion into a linear movement parallel to the movable opening / closing direction can be used, and various link mechanisms can be used.

When the mold is closed, the first core mold and the second core mold can be moved in the opposite directions to the mold opening by rotating the shaft portion in the direction opposite to the mold opening. It can be closed. This mold closing may be done manually. A plurality of first means and a plurality of second means may be provided, and three or more core molds may be automatically and simultaneously opened.

[0011]

The present invention will be described below in detail with reference to examples. FIG. 1 shows a molding die according to an embodiment of the present invention. This molding die is used to mold the corner portion of the weather strip shown in FIG. 4, and is opened and closed with a base 0, a lower die 1 fixed to the base 0, and a lower die 1 as a movable die. Upper mold 2,
A plate-shaped first core mold 3 arranged between the lower mold 1 and the upper mold 2.
And the second core mold 4 arranged on both upper and lower surfaces of the first core mold.
And a third core mold 5 and a slide core 6.

The ends of two types of weatherstrips having irregular cross sections are inserted into the molding dies through disposition holes (not shown) provided on the left and right sides, and the two weatherstrips are connected by injection molding to form the corners shown in FIG. The part is molded. This mold structure will be described with reference to FIG. 2 by taking a cavity portion forming a molded body joined to the end portion of one weather strip. The other weather strip has a similar mold structure at the end.

The lower mold 1 is a fixed mold and has a lower mold surface 10 forming the lower surface of the molded body 100. The upper mold 2 is a movable mold and has an upper mold surface 20 forming the upper surface of the molded body 100 and is configured to be vertically movable. First core type 3
Has an outer mold surface 30 forming the outer surface of the lip portion 101 of the molded body 100, and is slidably arranged in the second core mold 4. In addition, the second core mold 4 is the molding mold 100.
Has a core portion 40 that forms the right side surface of and the inner surface of the lip portion 101, and is movably arranged between the first core mold 3 and the lower mold 1. The third core die 5 has an upper die surface 50 that forms an undercut portion of the upper surface of the molded body 100, and is movably arranged between the first core die 3 and the upper die 2.
The slide core 6 has a left mold surface 60 forming the left side surface of the molded body 100, and is arranged between the lower mold 1 and the upper mold 2 so as to be slidable in a direction perpendicular to the mold clamping direction.

A U-shaped handle 31 is fixed to the front surface of the first core die 3. The second core mold 4 and the third core mold 5 are connected to each other by a first hinge 41 on the front surface, and are swingable with each other around a rotation center of the first hinge 41. Further, the first hinge 41 is fixed at the other end of the second hinge 11 whose one end is fixed to the base 0 and the lower die 1, and the first core die 4 and the third core die 5 are the second hinge 11.
It is possible to swing with respect to the base 0 and the lower mold 1 about the center of rotation of the.

Now, in the molding die of this embodiment, a device is devised on the outside of the die structure. That is, as shown in FIG. 1, a bearing 8 is fixed near the lower mold 1 of the base 0, and a shaft 80 is rotatably supported on the bearing 8. The tip of the shaft 80 extends to the front position of the first core mold 3,
The first engaging plate 81 protruding from the tip of the shaft 80 can be engaged with the handle 31, and the first core mold 3 can be pulled out forward by the rotation of the shaft 80.

A plate member 21 is provided on the upper mold 2 so as to project therefrom, and an adjusting rod 22 is hung and fixed to the plate member 21. The length of the adjusting rod 22 can be adjusted downward by screwing a nut 23, and a claw portion 24 is swingably provided at the lower end of the adjusting rod 22. A spring (not shown) is arranged inside the claw portion 24, and the spring is constantly urged downward. The claw 24 can be swung upward, but the claw 24 can be swung downward.
It is regulated by a stopper (not shown) at a position perpendicular to 2.

At the rear end of the shaft 80, one end of a first lever 82 extending rearward is fixed, and the first lever 82 is fixed.
The other end of the claw 24 can be engaged from below.
That is, when the upper mold 2 is driven to move upward, the claw portion 24 engages with the first lever 82 and lifts the first lever 82, whereby the shaft 80 rotates.

On the side surface of the second core mold 4, a second lever 42 bent into a shape in which two L-shapes are continuous is projected and fixed, and the tip end of the second lever 42 is the second core mold 4. Extend parallel to the side of the. The second engaging plate 83 projects from the root of the shaft 80 and extends rearward, so that the second engaging plate 8
3 is located below the lever 42. That is, the second engagement plate 83 is configured to engage with the lever 42 by the rotation of the shaft 80 and lift the lever 42 upward.

In the molding die of this embodiment having the above-mentioned structure, the mold is clamped as shown in FIG. 2, and the molded body 100 for connecting the end faces of the two kinds of weatherstrips inserted is formed. It is formed. At this time, the adjustment rod 22 is
4 is located below the first lever 82,
Its length is adjusted so as not to give any force to.
Further, the first engagement plate 81 is in the upright state and exerts no force on the handle 31, and the second engagement plate 83 is also positioned below the second lever 42 so as not to exert any force on the second lever 42. Has been done.

When a molded body is formed by injection molding in that state, first, the upper mold 2 is driven upward. Then the claw 24
Engages with the first lever 82 and lifts the other end of the first lever 82 as the pawl portion 24 rises. This causes the shaft 80 to rotate in the direction of arrow A in FIG. Then, the first engaging plate 81 rotates and engages with the handle 31, and the first core die 3
From the second core mold 4 and the third core mold 5. A little later than that, the second engagement plate 83 engages with the second lever 42,
The second lever 42 is pushed up. As a result, the second core type 4
Swings upward around the rotation center of the second hinge 11. At this time, since the third core mold 5 is connected to the second core mold 4 by the first hinge 41, the third core mold 5 also swings upward in synchronization with the second core mold 4. . Further, since the first core mold 3 is in contact with the second core mold 4, the first core mold 3 also swings upward while being pulled out by the first engaging plate 81.

Further, the slide core 6 slides rearward by a driving means (not shown). As a result, as shown in FIG. 3, the molded body 100 is released from the other mold surface while being attached to the second core mold 4 and the third core mold 5. After this,
The molded body 100 is released from the third core mold 5 by swinging the third core mold 5 around the rotation center of the first hinge 41, and finally, the core part of the second core mold 4. The lip portion 101 is released from 40.

In the next molding cycle, when the upper die 2 is lowered, the third core die 5 first comes into contact with the first core die 3 due to the pressing, and the first core die 3 and the second core die 3 are contacted. The mold 4 swings downward. Along with this, the slide core 6 moves forward and the second lever 42 presses the second engagement plate 83.
The second engagement plate 83 swings downward, and the first lever 82 rotates in the direction opposite to the A direction. As a result, the engagement between the handle 31 and the first engagement plate 81 is released, so that the first core plate 3 is pushed into the second core plate 4 and the mold clamping is completed.

When the claw portion 24 is pressed against the first lever 82 by the lowering of the upper mold 2, the claw portion 24 is swung upward against the urging force of a spring (not shown), and the first lever 82 is moved.
After getting over the vehicle, the spring biases it at right angles to the adjusting rod 22 to prepare for the next rise. That is, according to the molding die of this embodiment, the molded body 100 can be released from the lower mold 1 and the first core mold 3 at the same time when the upper mold 2 is driven to move upward, and the second core mold 4 and the third core mold 3 can be released. The child mold 5 can be automatically lifted. Therefore, the work time required for mold release can be greatly shortened, and the molding cycle time can be shortened.

[0024]

That is, according to the molding die of the present invention, it is possible to easily open a plurality of core molds whose mold opening / closing directions intersect with each other without manual work, without touching the inside of the mold. Therefore, the man-hour can be reduced without increasing the die manufacturing cost.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a molding die according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state immediately after molding of a molding die according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the state of the molding die of the embodiment of the present invention when the die is opened.

FIG. 4 is a perspective view of a molded body formed by a molding die according to an embodiment of the present invention.

[Explanation of symbols]

1: Lower mold (fixed type) 2: Upper mold (movable type)
3: 1st core type 4: 2nd core type 5: 3rd core type
6: slide core 11: second hinge 22: adjusting rod 3
1: Handle 41: First hinge 42: Second lever 8
0: Shaft (shaft part) 81: First engaging plate 82: First lever 8
3: Second engagement plate

Claims (1)

[Claims] 1. A first core mold which is moved between a fixed mold fixed to a base and a movable mold in a direction substantially orthogonal to a mold opening / closing direction and a mold is opened / closed by moving in a mold opening / closing direction. In a molding die having a second core die, a shaft portion pivotable by the movement of the movable die is pivotally supported on the base, and the shaft portion engages with the first core die. And a first means for opening the first core mold by a pivotal movement of the shaft portion, and a second means by a pivotal movement of the shaft portion engaged with the second core die. A molding die comprising: a second means for opening the child die.