JP3151796B2 - Mold equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold apparatus having a slide core, and more particularly to a groove for mounting an angular pin.

[0002]

2. Description of the Related Art Generally, when molding a molded product having an undercut portion, a slide core that slides with an angular pin is used, and a conventional mold apparatus having such a slide core is shown in FIGS. It will be described based on FIG. In the figure, 1 is a fixed mold, 2 is a movable mold, 3 is both molds 1 and 2.
With the slide core incorporated between them, the two dies 1 and 2 move relatively vertically in the figure to open and close, and the slide core 3 can slide in the direction perpendicular to the opening and closing direction of the dies 1 and 2. When the molds 1 and 2 and the slide core 3 are clamped, the mold 4 and the slide core 3 define the cavity 4 of the molded product A. In addition, the fixed mold 1
The upper end of the angular pin 5 has a threaded portion 5A, and a substantially central portion of the threaded portion 5A is engaged with a tool such as a spanner (not shown). Is provided with a flat polygonal portion 6 by shaving the outer peripheral surface of the flat portion. In the fixed mold 1, a mounting hole 7 for the angular pin 5 is formed so as to be inclined in a direction away from the cavity 4, and a screw portion to be screwed with the screw portion 5A is formed on the bottom surface of the mounting hole 7. A hole 8 is formed. And the screw portion 5 of the angular pin 5
A spring washer 9 for adjusting the height of the angular pin 5 is externally provided on the outer periphery of A, and the screw portion 5A is screwed into the screw hole 8, and a tool such as a spanner is engaged with the flat portion 6 of the angular pin 5. Then, the angular pin 5 is rotated and tightened to fix the angular pin 5 to the fixed mold 1 in accordance with the inclination of the mounting hole 7. The slide core 3 is provided with an inclined hole 10 through which the angular pin 5 is inserted, and the engagement between the angular pin 5 and the inclined hole 10 opens and closes the fixed mold 1 and the movable mold 2. And slides the slide core 3 along the movable mold 2. In order to prevent the slide core 3 from moving due to the molding pressure of the molded product A at the time of mold clamping, a locking block 11 that comes into contact with the slide core 3 is provided on the fixed mold 1. It is fixed to a positioning recess 1A to be formed by a bolt 12. In addition, this locking block 11
The contact surfaces of the slide core 3 and the slide core 3 are inclined surfaces 11 that are inclined downward and away from the cavity 4.
A, 3A.

At the time of molding, first, the fixed mold 1
And the movable mold 2 and the slide core 3 are clamped. In this state, the molten resin is poured into the cavity 4. At this time, an inner pressure is applied to the slide core 3 in a direction in which the slide core 3 is pushed and opened by the molding pressure of the molded product A, but the inclined surface 3A of the slide core 3 contacts the inclined surface 11A of the locking block 11, and Since the core 3 is supported by the locking block 11, the movement of the slide core 3 is prevented. After the resin filled in the cavity 4 is solidified, the fixed mold 1 and the movable mold 2 are opened. With the opening of the mold, the molded product A in the cavity 4 is separated from the fixed mold 1, and the slide core is fixed by the angular pin 5 fixed to the fixed mold 1 as shown by a chain line in FIG. 5. 3 moves in the direction away from the molded article A, and the molded article A
And the slide core 3 are separated. Then, the molded product A is protruded by a protrusion member (not shown) provided on the movable mold 2 side, and the molded product A and the movable mold 2 are separated. And
After the molded product A is taken out, when the fixed mold 1 and the movable mold 2 are clamped again, the slide core 3 moves by the angular pins 5 and returns to the initial position at the time of molding.

[0004]

In the conventional mold apparatus, the angular pin 5 is inserted into the inclined hole 10 of the slide core 3 and the slide core 3 is closed when the mold is clamped.
Since the inclined surface 3A contacts the inclined surface 11A of the locking block 11, when the relative displacement between the angular pin 5 and the locking block 11 occurs,
Sliding core 3 and each inclined surface 3 of locking block 11
Inconveniences such as a gap between A and 11A or an inability to insert the angular pin 5 into the inclined hole 10 occur. However, in the conventional mold apparatus, the angular pin 5 and the locking block 11 are individually assembled to the fixed mold 1, so that the angular pin 5 and the locking block 11 after the assembly are assembled. Poor position accuracy. For this reason, as means for absorbing a relative assembly error between the angular pin 5 and the locking block 11, the inclined hole 10 of the slide core 3 through which the angular pin 5 is inserted as shown in FIG. It is conceivable to form the clearance a larger than the diameter of the regular pin 5 and to form a clearance a between the angular pin 5 and the inclined hole 10 to absorb an assembly error. However, in this case, the clearance 1 between the angular pin 5 and the inclined hole 10 causes
When the movable mold 2 is closed, the angular pin 5 is inclined
10, the slide core 3 cannot move instantaneously in the direction away from the molded product A in connection with the closing of the molds 1 and 2,
There is a possibility that the molded article A may be damaged by being caught on the undercut portion of the molded article A. Therefore, to prevent the damage of the molded product A,
In order to correct the assembly accuracy error between the angular pin 5 and the locking block 11, the diameter of the angular pin 5 and the inclined hole 10 are substantially the same as shown in FIG. Add error is spring washer 9
Adjust the number of
With regard to (1), the upper surface 11A of the locking block 11, which is the surface to be attached to the fixed mold 1, is polished to correct errors in assembly accuracy. For this reason, when assembling the angular pin 5 and the locking block 11, the adjustment and correction must be repeatedly performed in accordance with the actual product, and the locking block
The hardening block 11 is formed by processing hardened steel in order to enhance abrasion resistance, and has such a problem that the mold manufacturing period is prolonged because the locking block 11 having such hardness is polished.

On the other hand, Japanese Unexamined Utility Model Publication No. 59-15523 discloses that an angular pin is attached to a locking block. According to this structure, the angular pin, the locking block and the slide core are attached to each other. It is possible to improve the relative position accuracy. However, in the mold device described in the above publication, in the locking block and the slide core, the inclined surface is located closer to the cavity than the angular pin and the inclined hole through which the angular pin is inserted, and the fixed side since the inclined surface portion and the hole portion of the slide core is in the structure that does not overlap in the projection <br/> into the mold and a movable side mold opening and closing direction parallel to the plane, inclined in dimensioning
Since the inclined surface and the inclined hole restrict each other, the inclined surface of the slide core cannot be increased and the hole of the slide core cannot be elongated. Therefore, the slide core cannot be securely held at the closed position against the pressure of the resin in the cavity, and the operation of the slide core linked to the opening and closing of the fixed mold and the movable mold may become uncertain. .

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and can improve the relative positional accuracy of an angular pin, a locking block, and a slide core mounted on a fixed mold, and a slide core provided by the locking block. It is an object of the present invention to provide a mold device capable of reliably holding the slide core and reliably operating the slide core.

[0007]

In order to achieve the above object, a mold apparatus according to the present invention comprises a fixed mold and a movable mold that can be opened and closed, and a mold that is opened and closed in a direction perpendicular to the opening and closing directions of the two molds. A sliding core provided slidably, and a locking block fixed to the fixed-side mold, wherein the fixed-side mold, the movable-side mold and the slide core are clamped to each of the molds and the slide core. A cavity is formed between the fixed side mold and an angular pin inclined in a direction away from the cavity toward the movable side mold is fixed to the fixed side mold, and the locking block is fixed to the movable side mold toward the movable side mold. Forming an inclined surface inclined in a direction away from the cavity, providing an inclined hole through which an angular pin is inserted in the slide core, and forming an inclined surface that comes into contact with the inclined surface of the locking block; By the engagement of the angular pin and the inclined hole, the slide core is slid in connection with opening and closing of the fixed mold and the movable mold, and the locking block slides on the inclined surface of the slide core during the mold clamping. In a mold apparatus for restricting sliding of a slide core by contacting an inclined surface, a mounting base for attaching the angular pin from a base end of the inclined surface toward a cavity is integrally formed with the locking block. Things.

[0008]

In the mold device according to the present invention, the angular accuracy of the angular pin and the locking block can be improved with respect to the locking block by directly assembling the angular pin on the mounting base integrally formed with the locking block. By fixing the locking block integrally assembled with the angular pins to the fixed mold as described above, the relative positional accuracy between the angular pins and the slide core engaged with the locking block is improved. Can be Further, the mounting base is formed from the base end of the inclined surface to the cavity in the locking block, and the angular pin and the inclined hole are located closer to the cavity than the inclined surface in the locking block and the slide core. since, also enables naturally be a structure that overlaps a portion of the fixed mold and the inclined surface portion of the slide core in the projection of the movable mold to the opening and closing direction parallel planes inclined holes, the dimensions In settings
The restriction imposed by the inclined surface and the inclined hole on each other is reduced.
Thereby, the inclined surface can be enlarged and the inclined hole can be elongated. And by being able to enlarge the slope,
By securely holding the slide core in the closed position against the molding pressure in the cavity and making the inclined hole longer,
The slide core can be reliably operated in connection with opening and closing of the fixed mold and the movable mold.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a mold apparatus according to the present invention will be described below with reference to FIGS.

In the figure, reference numeral 20 denotes a resin molded product.
Is, for example, a box-shaped opening on the lower surface in the figure, and has a hole 20A serving as an undercut on the side surface. Also, 21
Is a fixed mold, 22 is a movable mold, and a slide core having a projection 20B corresponding to the hole 20A between the molds 21 and 22.
23 is incorporated so as to be movable in the illustrated horizontal direction. The fixed-side mold 21 and the movable-side mold 22 move relatively vertically in the figure to open and close, and the slider 23 is connected to the opening and closing of each of the molds 21 and 22, and is orthogonal to the opening and closing direction. It slides on the movable mold 22. When the molds 21 and 22 and the slide core 23 are clamped, the cavity 24 having the shape of the molded product 20 is used.
Is defined. The fixed mold 21 includes a cavity member 25 forming a cavity 24, a receiving plate 26 fixed to the upper side of the cavity member 25 in the drawing, and a spacer block (not shown) on the upper side of the receiving plate 26 in the drawing. A fixed-side mounting plate fixed to the fixed-side platen of the injection molding machine, and a manifold provided between the fixed-side mounting plate and the receiving plate 26 are provided. On the other hand, the movable mold 22 includes a core member 27 forming the cavity 24, a receiving plate 28 fixed below the core member 27 in the drawing, and a spacer block 29 below the receiving plate 28 in the drawing. And a movable side mounting plate 30 mounted on a movable side platen of an injection molding machine fixed and fixed between the receiving plate 28, the spacer block 29 and the movable side mounting plate 30 as shown. The protruding plates 31 and 32 are disposed, and the lower ends of the protruding pins 33 for projecting the molded product 20 toward the fixed mold 21 by slidably penetrating the core member 27 through the protruding plates 31 and 32 are fixed. Have been. As shown in FIG. 1, a slide core is provided in the cavity member 25 of the fixed mold 21.
A locking block 34 that abuts on 23 is fixed by bolts 35, and the locking block 34 and the slide core 23 are fixed.
Are formed with inclined surfaces 34A and 23A which are inclined in a direction away from the cavity 24 downward in the figure.
When the molds 21 and 22 and the slide core 23 are clamped, the locking block 34 and the respective inclined surfaces 34A and 23A of the slide core 23 are abutted to restrict the movement of the slide core 23 in the mold opening direction.
A mounting base 36 is integrally formed on the locking block 34 from the base end of the inclined surface 34A toward the cavity 24. The mounting base 36 has mounting holes inclined in the same direction as the inclined surfaces 34A and 23A. The angular pin 38 is integrated with the locking block 34 by press-fitting the angular pin 38 into the mounting hole 37. And
Angular pin assembled to the locking block 34
An inclined hole 39 is formed in the slide core 23 so as to slidably insert the angular pin 38 in correspondence with the fixed core 38.
The slide core 23 is slid along the core member 27 in connection with the mold clamping and the mold opening of the movable mold 22. In addition,
In the figure, reference numeral 40 denotes a protruding rod of the injection molding machine. The protruding rod 40 penetrates through holes 41 formed in the movable mounting plate 30 and protrudes the protruding plates 31, 32 upward in the drawing.

Next, the operation of the above configuration will be described. In molding, first, the fixed mold 21 and the movable mold 22 are clamped as shown in FIGS. In this state, a cavity 24 is formed between the cavity member 25 of the fixed mold 21 and the core member 27 and the slide core 23 of the movable mold 22. Also, the inclined surface of the slide core 23
23A and the inclined surface 34A of the locking block 34 fixed to the fixed mold 21 abut against the fixed mold 21.
The ejecting plates 31 and 32 are held at the illustrated lower position by return pins (not shown) provided on the
The upper end surface of 33 is located so as to form a part of the cavity surface. In such a mold clamping state, the molten resin is poured into the cavity 24. At this time, the mold pressure is applied to the slide core 23 in the direction of pushing and opening the slide core 23 due to the molding pressure of the molded product 20, but the inclined surface 23A of the slide core 23 is attached to the fixed mold 21 as described above. Since the sliding core 23 abuts against the inclined surface 34A of the fixed locking block 34, the slide core 23 is supported by the locking block 34, and the movement of the slide core 23 is prevented. And the cavity
After the resin filled in 24 solidifies, as shown in FIG.
The fixed mold 21 and the movable mold 22 are opened. With the opening of the mold, first, the cavity member 25 of the fixed mold 21 is
The angular pins 38 attached to the mounting base 36 of the locking block 34
The slide core 23 slides along the core member 27 of the movable mold 21, separates from the molded product 20, and slides out of the slide core 23 through the hole 20 A of the molded product 20. Projection 20B comes off. Then, after the slide core 23 has sufficiently moved away from the molded product 20, that is, to a position where the slide core 23 does not hinder the protrusion of the molded product 20, the protruding plates 31 and 32 start to protrude upward in the drawing, that is, toward the fixed mold 21. Then, the molding block 20 is protruded from the movable mold 22 toward the fixed mold 21, separates from the movable mold 22, and is fixed to the slide core 23 and the fixed mold 21.
Are separated from each other. Then, after the molded product 20 that has been released is taken out, the mold is clamped again for the next molding. At the time of this mold clamping,
As the ejecting rod 40 of the injection molding machine descends in the figure, the ejecting plates 31 and 32 together with the ejecting rod 40 descend relative to the movable mold 22 as shown in the figure, and as shown in FIG. The 31 and 32 and the protruding pin 33 return to the lowermost position of the movable mold 22, that is, the initial position at the time of molding.
Also, from the time when the protruding plates 31, 32 and the protruding pins 33 return to the initial positions at the time of molding, the angular pins 38 are inserted into the inclined holes 39 of the slide core 23, and the slide core 23 is turned upside down when the mold is opened. Start moving in the direction. Then, when the mold clamping is completed, as shown in FIG. 2, a cavity 24 is formed between the cavity member 25 of the fixed mold 21 and the core member 27 and the slide core 23 of the movable mold 22. At the same time, the inclined surface 23A of the slide core 23 comes into contact with the inclined surface 34A of the locking block 34 fixed to the fixed mold 21.

As described above, according to the configuration of the embodiment, the mounting base 36 is integrally formed with the locking block 34,
An angular pin 38 is provided in a mounting hole 37 provided in the mounting base 36.
Into the locking block 34 with angular pins 38
Is integrated, the inclined surface of the slide core 23 is
The mutual positions of the inclined surface 34A of the locking block 34 that comes into contact with 23A and the angular pin 38 that is press-fitted into the mounting hole 37 of the mounting base 36 can be accurately adjusted. That is, in manufacturing the locking block 34, it is easy to manufacture the dimensions of the inclined surface 23A and the mounting hole 37 of the angular pin 38 accurately in the manufacturing process, and thus, the dimensional accuracy is high. An angular pin 38 is assembled with the locking block 34 as a reference, and the angular pin 38 and the inclined surface 34 are attached.
Position accuracy with A can be improved. By fixing the locking block 34 integrally assembled with the angular pins 38 to the fixed mold 21, the angular pins 38, the locking blocks 34 and the slide core 23 are fixed.
The relative positional accuracy of each component can be improved. As a result, the angular pin 38 and the angular pin
It is not necessary to set more clearance than necessary with the inclined hole 39 of the slide core 23 into which the 38 is inserted. Therefore, the slide core is connected to the mold opening of the fixed mold 21 and the movable mold 22,
There is no danger that the molded product 20 will be damaged and the molded product 20 will be damaged. Further, unlike the above-described conventional die apparatus, the adjustment and correction are not repeatedly performed by assembling the parts after assembling the respective parts, so that the die manufacturing period can be shortened. Further, the mounting base portion 36 is formed in the locking block 34 from the base end of the inclined surface 34A toward the cavity 24, and in the locking block 34 and the slide core 23, the angular pin 38 and the angular pin 38 are larger than the inclined surfaces 34A, 23A. Since the inclined hole 39 is located closer to the cavity 24,
A flat parallel to the opening and closing direction of the fixed mold 21 and the movable mold 22
Also enables naturally be in projection onto a surface structure that overlaps the inclined surface 23A portion as part of the inclined hole 39 of the slide core 23, the inclined surface 23A and the inclined hole in dimensioning
By reducing the mutual restrictions of 39,
23A can be made large and the inclined hole 39 can be made long.
And since the inclined surfaces 23A and 34A can be enlarged,
The slide core 23 can be securely held at the closed position against the molding pressure in the cavity 24, and the inclined hole 39 can be elongated, so that the slide core 23 is linked to the opening and closing of the fixed mold 21 and the movable mold 22. Can be reliably operated.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made. For example,
The structure of the protruding pins for protruding the molded product may be appropriately set, and the structure of the molding machine itself is applicable to various types. Further, the shape and mounting structure of the locking block may be set as appropriate.

[0014]

According to the present invention, a fixed mold and a movable mold that can be opened and closed, a slide core slidably provided in a direction perpendicular to the opening and closing directions of the two molds, and the fixed mold. A locking block fixed to the mold, and clamping the fixed mold and the movable mold and the slide core to form a cavity between each mold and the slide core,
An angular pin which is inclined in a direction away from the cavity toward the movable side mold is fixed to the fixed side mold, and an inclined surface which is inclined in a direction away from the cavity toward the movable side mold on the locking block. The slide core is provided with an inclined hole through which an angular pin is inserted, and an inclined surface that comes into contact with the inclined surface of the locking block is formed, and the fixing is performed by engaging the angular pin with the inclined hole. While sliding the slide core in connection with opening and closing of the side mold and the movable side mold, the slide core slides by bringing the locking block into contact with the slope of the slide core during the mold clamping. In the regulating die apparatus, the angular pin is attached to the locking block from the base end of the inclined surface toward the cavity. By integrally forming the part, it is possible to provide a mold apparatus which can improve the relative positional accuracy between the angular pin and the locking block and the slide cores are assembled to the fixed mold. In addition, since the angular pin and the inclined hole are located closer to the cavity than the inclined surface, the projection on the plane parallel to the opening and closing direction of the fixed mold and the movable mold has a portion corresponding to the inclined surface of the slide core. also it enables naturally be a structure that overlaps a portion of the inclined hole, inclined in dimensioning
Less restrictions on slopes and slope holes
Thereby, the inclined surface can be enlarged and the inclined hole can be elongated. Therefore, the slide core can be reliably held at the closed position against the molding pressure in the cavity, and
The slide core can be reliably operated in connection with opening and closing of the fixed mold and the movable mold.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view around a locking block showing a first embodiment of a mold apparatus according to the present invention.

FIG. 2 is a cross-sectional view of the same mold clamping state.

FIG. 3 is a cross-sectional view of the same mold open state.

FIG. 4 is an enlarged cross-sectional view of the vicinity of a locking block in a mold clamping state showing an example of a conventional mold apparatus.

FIG. 5 is an enlarged cross-sectional view around a locking block in the same mold clamping state.

[Explanation of symbols]

 21 Fixed mold 22 Movable mold 23 Slide core 23A Inclined surface 24 Cavity 34 Locking glock 34A Inclined surface 36 Mounting base 38 Angular pin 39 Inclined hole

Continuation of the front page (56) References Japanese Utility Model Sho-59-15523 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B29C 45/26-45/44

Claims (1)

(57) [Claims] An openable / closable fixed mold and a movable mold;
A slide core provided slidably in a direction orthogonal to the opening and closing directions of the two dies, and a locking block fixed to the fixed die, the fixed die, the movable die, and the slide core; A mold is clamped to form a cavity between each of the molds and the slide core, and an angular pin that is inclined in a direction away from the cavity toward the movable mold is fixed to the fixed mold, The locking block has an inclined surface inclined in a direction away from the cavity toward the movable mold, and the slide core is provided with an inclined hole for inserting an angular pin, and the inclined surface of the locking block is formed on the inclined surface of the locking block. The sliding core is slid by forming an inclined surface to be in contact with the opening and closing of the fixed mold and the movable mold by engagement of the angular pin and the inclined hole. In addition, in a mold apparatus for restricting sliding of the slide core by bringing the inclined surface of the locking block into contact with the inclined surface of the slide core at the time of the mold clamping, the locking block is provided with a cavity from a base end of the inclined surface. A mold device, wherein a mounting base for mounting the angular pin is formed integrally with the die.