JPH0740352A - Mold equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Even if the movable insert of the die has a recess forming part on a plane parallel to the advancing / retreating direction, it is formed by advancing / retreating so that it can be taken out after opening the mold. [Structure] The movable nest 12 is moved to and from the main body 12 which is advanced and retracted.
1 and a slide body 122 supported by a guide 123 so that the slide body 122 can slide in the advancing / retreating direction within a predetermined range with respect to the main body 121.
And the stopper means 125 for receiving and stopping the slide body 122 at a molding position in a predetermined advancing / retracting direction involved in the molding, and actuating the biasing means 124 for advancing in the advancing / retracting direction. The slide body 122 stopped at the molding position is pushed out in a direction orthogonal to the forward / backward direction by relative movement when the main body 121 moves forward / backward, and the guide 123 is moved forward / backward in the forward / backward direction of the main body 121 so as to return to the non-extruded position. It is characterized by being inclined with respect to.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold device, and more specifically, to a dent molding portion having a surface parallel to the separating direction of the mold,
A mold apparatus provided with a movable nest that is capable of advancing and retracting in a direction intersecting with the separating direction and participating in molding in the recess molding portion when advancing, and ejecting a molded product by mold separation when retracting Is.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional mold apparatus of this type. As shown in the figure, molding is performed between the fixed-side insert 5 provided on the fixed-side mold not shown arranged on the upper side and the movable-side insert 3 provided on the movable-side mold not shown arranged on the lower side. Item 1 is to be molded.

The molded product 1 is taken out by being ejected after the vertical mold opening operation of the fixed mold and the movable mold. However, since the molded product 1 has the recessed portion 1b inside the end edge of the outer peripheral wall 1a, the mold has a recessed molded portion 3a on a surface parallel to the mold opening direction of the movable insert 3 in order to mold the recessed portion 1b. Is formed, and has a movable insert 2 as a so-called cab slide corresponding to the recess forming portion 3a.

The movable insert 2 is connected to a cylinder rod 4 as an actuator (not shown) and is moved back and forth in a direction orthogonal to the mold opening direction. Further, it is involved in the molding in the recess molding portion 3a at the advancing direction molding position in the figure, and the molded product 1 can be ejected at the time of mold opening by the pre-pulling operation retracted from the advancing direction molding position in the figure prior to the mold opening operation. To

[0005]

By the way, it is general that the movable insert 2 is provided with a draft as shown in the drawing so that it can be easily retracted after the molding.

Therefore, the recessed portion 1b of the molded product 1 has a shape that becomes narrower on the inner side and has an outer peripheral wall 1 having a flat outer surface.
The thickness of a gradually increases toward the inner part of the recess 1b.

The thick portion 1c thereby causes a sink when the molten resin is cooled and volumetrically contracts, and an excessive increase in the thickness results in wasteful consumption of the resin material.

In order to solve these problems, it is conceivable to reduce the wall thickness as shown by the phantom line in FIG. 3 and provide a rib-shaped flange 1d for guaranteeing strength.

However, since such a shape of the molded product 1 requires a recess molding portion on a plane parallel to the advancing / retreating direction of the movable insert 2, the recess molding portion of the conventional movable insert 2 is not caught. It cannot be advanced or retracted and cannot be molded.

An object of the present invention is to solve such a problem, and to provide a mold apparatus capable of molding even a product which requires a recess molding portion on a plane parallel to the advancing / retreating direction of a movable insert. It is intended.

[0011]

In order to achieve the above-mentioned object, the mold apparatus of the present invention has the above-mentioned mold opening direction in a recess molding portion having a surface parallel to the mold opening direction of the mold. In a mold device provided with a movable nest that is capable of advancing and retreating in a direction intersecting with and advancing in the depression molding portion at the time of advancing, and also capable of ejecting a molded product by mold opening at the time of retreating, the movable nest is The main body is moved forward and backward, and the slide body is supported by a guide so as to be slidable in a predetermined range in the forward and backward directions with respect to the main body. When the main body moves the slide body stopped at the forward / backward direction forming position by providing the stopper means for receiving the slide body at the predetermined forward / backward direction forming position related to the forming in the mold while operating the biasing means. of Was Seridasa in a direction perpendicular to the moving direction by pairs movement and is characterized in that the guide so as to return to a non-protruding position is inclined with respect to forward and backward direction of the main body.

[0012]

In the above-described structure of the mold apparatus of the present invention, when the main body of the movable nest is at the most retracted position, the slide body is maximally projected in the advancing direction from the main body of the movable nest by the urging means, and The guide is returned to the non-protruding position on the main body and is in the non-protruding state. When the main body is advanced in this non-protruding state, the slide body moves along with this through the biasing means.

Then, when the slide body reaches a predetermined advance direction forming position involved in forming, it is received by the stopper and does not further advance, and thereafter only the main body resists the urging means between the slide body and the slide body. While continuing to move forward and approaching the predetermined moving direction molding position that is involved in molding, the relative movement with the slide body causes it to stick out in a direction orthogonal to the moving retractable direction of the movable nest in the moving direction moving position. At the same time as reaching the forming position in the advancing direction, the slide body is made to reach a predetermined protruding-side forming position involved in forming on the protruding side. The slide body can be properly faced to the molding positions in the two directions without obstruction so that the slide body can be molded.

When the main body of the movable insert is retracted from this moldable state, the slide body is first retracted while being held at the predetermined advance direction molding position received by the stopper by the urging means. By moving relative to the main body, the slide side is returned from the forming position to the non-extruding position, and even if there is a recess forming part on the slide side of the slide body, the return operation is performed while the main body is not being reciprocally moved. It is pulled out from the hollow part of. Therefore, after that, the play between the main body and the slide body disappears, and thereafter the slide body moves along with the main body and is retracted from the predetermined forward / backward direction forming position, but even if the slide body has the protrusion-side recess forming portion. Since it has already been extracted from the recess of the molded product as described above, the main body of the movable insert and the slide body can be retracted without being disturbed by this, and the protruding of the molded product during the mold opening operation is enabled.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A mold apparatus as an embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, molding is carried out between a fixed-side insert 15 provided on the fixed-side mold provided on the upper side and a movable-side insert 13 provided on the movable-side mold provided on the lower side. A part of the product 11 is molded.

The molded product 11 is ejected and ejected by an ejection mechanism (not shown) after the vertical mold opening operation between the fixed side mold and the movable side mold. However, the molded product 11 has a hollow portion 11 inside the end portion of the outer peripheral wall 11a, which has the outer peripheral wall 1a as a part of the peripheral wall and is opened leftward in the drawing.
Since it has b, in order to mold the mold, the mold forming portion 1 is formed in a plane parallel to the mold opening direction of the movable side insert 13.
3a is formed, and has a movable insert 12 which is a so-called cabinet slide corresponding to the recess forming portion 13a.

The movable insert 12 is connected to a cylinder rod 14 as an actuator (not shown) and moved forward and backward in the horizontal direction orthogonal to the mold opening direction. Then, it advances to the molding position shown in the drawing and participates in the molding in the recess molding portion 13a, and enables the ejection of the molded product 1 at the time of mold opening by the pre-pulling operation retracted from the molding position shown in the drawing prior to the mold opening operation. , So that it can be pulled out.

In particular, in this embodiment, by forming a recess 11c opened downward on the inner surface of the recess 11b along the outer peripheral wall 1a of the molded product 11, the wall thickness can be reduced as shown in the figure and the strength can be guaranteed. Ribbed flange 11 for
A molded product 11 having d is formed.

Along with this, the movable insert 12 is provided with a hollow forming portion 12a for thinning the rib and forming the rib-shaped flange 11d. The recess molding portion 12a is provided on a surface parallel to the moving direction of the movable insert 12, and the movable insert 12 as in the related art cannot advance or retract and cannot be formed.

To enable this, first, the movable nest 1
2 is composed of the main body 121 to be advanced and retracted, and a slide body 122 supported by a guide 123 so as to be slidable in a predetermined range with respect to the main body 121 in the forward and backward directions. The recess forming portion 12a is provided on the side of the slide body 122 opposite to the side facing the body 121, and the slide body 122 is provided between the slide body 122 and the spring bearing 128 which is provided integrally with the body 121. A stopper 125 is provided between the slide body 122 and the movable-side insert 13 of the mold to actuate a spring 124 that biases the slide body 122 in the advancing direction and to stop the slide body 122 at a predetermined advancing position involved in molding. is there. Further, the guide 123 is inclined in the advancing / retreating direction of the main body 121 so that the slide body 122, which is stopped at a predetermined molding position and is stopped, is pushed and pulled back in a direction perpendicular to the advancing / retreating direction by the advancing / retreating of the main body 121.

The guide 123 is formed by a ridge 126 having a T-shaped cross section provided on the side of the main body 121 and a groove 127 having a T-shaped cross section provided on the slide body 122 so that the ridge 126 is slidably fitted. However, any structure may be used as long as it exhibits a similar guide function, and various types such as a guide rod may be used.

When the main body 121 of the movable nest 12 is in the rearmost retracted position, the slide body 122 is maximally protruded from the main body 121 of the movable nest 12 in the advancing direction by the spring 124, and the slide body 122 does not extend beyond the main body 121 of the movable nest 12. It is in the non-projection state shown in FIG. 2 in which it is returned to the position by the guide 123. When the main body 121 is advanced in this non-protruding state, the slide body 122 moves along with the spring 124 via the spring 124.

When the slide body 122 reaches a predetermined advancing direction molding position involved in molding, the stopper 125
It is accepted by and it does not advance further, after that the main body 12
1 continues to advance against the spring 124 between itself and the slide body 122, and moves toward and away from the slide body 122 by moving relative to the slide body 122 while approaching the predetermined advance direction molding position involved in the molding shown in FIG. Movable nest 12 in the molding position
Of the slide body 122 at the same time when the main body 121 reaches the advancing direction forming position.
Since the protruding side reaches a predetermined protruding side molding position which is involved in the molding on the protruding side and is shown in FIG. 1, even if there is the recess forming part 12a on the surface parallel to the advancing and retracting direction of the movable insert 12, the slide body 122 does not interfere with this. Can be properly faced to the respective molding positions in the two directions, and the state of FIG.

When the main body 121 of the movable insert 12 is retracted from the moldable state of FIG. 1, the slide body 122 is first moved to the predetermined advance direction molding position received by the stopper 125 by the urging of the spring 124. While being held as shown in FIG. 2, the relative movement with respect to the retreating main body 121 restores the protruding side forming position to the non-extruding position shown in FIG. 2, and the recess forming portion 12a is formed on the protruding side of the slide body 122. Even if there is, it is pulled out from the recessed portion 11c of the molded product 11 by the returning operation while not being driven by the retreat of the main body 121. Therefore, the main body 1
21 disappears from the play with the slide body 122, and thereafter the slide body 122 is moved together with the main body 121 and retracted from a predetermined forward / backward direction forming position. However, the slide body 122 has the protrusion-side depression forming portion 12a. However, since it is already extracted from the recessed portion 11c of the molded product 11 as described above, the main body 1 of the movable nest 12 is not disturbed by this.
21 and the slide body 122 are retracted so that the molded product 11 can be ejected after the mold opening operation.

Therefore, the recesses 11b and 11 are formed.
This can be molded even with the molded product 11 having c.

Further, the construction of the movable insert 12 according to the present embodiment can be easily formed from a molded product without a draft, except when the recess forming portion 12a is provided on a plane parallel to the advancing / retreating direction thereof. There is also an advantage that it can be extracted.

[0028]

According to the mold apparatus of the present invention, the main body of the movable nest is advanced to a predetermined advance / retreat direction molding position involved in the formation of the recessed portion of the molded product, and is retracted from this advance / retreat direction molding position. And the relative movement of the slide body relative to the main body via the guide, the slide body first reaches the advance / retract direction forming position when the main body advances, and then the main body reaches the advance direction forming position at the same time. , The slide body is pushed out in the advancing direction forming position in the direction orthogonal to the advancing / retreating direction to reach the extruding side forming position, and even if there is a dent forming part on the surface parallel to the advancing / retracting direction of the movable nest, this forming part Is set on the protruding side of the slide body so that the slide body can be properly faced to each molding position in the two directions without obstruction of the recess molding portion so as to be in a moldable state, and the main body of the movable nest retracts. of, By the opposite relative movement of the body and the slide body, even if the slide body has the above-mentioned protrusion-side depression forming portion, the main body of the movable nest and the slide body are retracted without being disturbed, so It is possible to mold a molded product having a shape in which a recessed molded portion is provided on parallel surfaces and take it out without difficulty after opening the mold.

[Brief description of drawings]

FIG. 1 is an assembly cross-sectional view showing a state at the time of molding of a resin molding die as one embodiment to which the present invention is applied.

FIG. 2 is a cross-sectional view showing a state in which the movable nest of the mold device of FIG. 1 is being retracted.

FIG. 3 is an assembled sectional view showing a state of a conventional resin molding die during molding.

[Explanation of symbols]

 11 Molded Product 11b Depression 12 Movable Nest 12a Grip Pin 13 Movable Side Nest 14 Piston Rod 15 Fixed Side Nest 121 Main Body 122 Slide Body 123 Guide 124 Spring

Claims (1)

[Claims] 1. A dent forming part having a surface parallel to a mold opening direction of a die, which is involved in dent forming in the dent forming part when advancing and retracting in a direction intersecting with the mold opening direction and advancing, In a mold device provided with a movable insert capable of ejecting a molded product by opening the mold when retreating, a movable insert is provided so that the movable insert can be slid relative to the main body in a predetermined range in the advancing / retracting direction. It is composed of a slide body supported by a guide, and the urging means for urging the slide body in the advancing direction between the main body and the main body is operated, and the slide body is moved to a predetermined advance / retract direction forming position involved in forming in the mold. Providing stopper means for receiving and stopping
Advancing / retreating direction The slide body stopped at the forming position is pushed out in a direction orthogonal to the advancing / retreating direction by the relative movement when the main body is advancing / retreating, and the guide is moved in the advancing / retreating direction of the main body so as to return to the non-protruding position. A mold device characterized by being inclined.