JP2003053795A - Slide mechanism of slide core - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the slide mechanism of a slide core capable of sliding the slide core moving along an inclined route different in oblique angle. SOLUTION: The slide mechanism of the slide core is equipped with the slide core Sa having a core part formed to the leading end thereof and capable of moving forwardly and rearwardly along the inclined route going toward the cavity of a mold, and the slide unit 26a locked with the slide core to be horizontally moved forwardly and rearwardly to move the slide core forwardly and rearwardly along the inclined route. The slide core is equipped with a first locking part 68, and the slide unit is equipped with the second locking part 66 capable of being locked with the first locking part of the slide core. The first and second locking parts can be locked so as to connect the slide unit and the slide core while permitting the up and down relative movement between the slide core and the slide unit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide mechanism for a slide core for an injection molding die, and more particularly, a mechanism for sliding a slide core that slides along an inclined path that is inclined upward or downward. The present invention relates to an injection molding die having such a mechanism.

[0002]

2. Description of the Related Art In injection molding for molding a material by mass-producing a product, a mold provided with a fixed mold and a movable mold configured to be movable with respect to the fixed mold is generally used. And the moving mold are joined, the molten material is injected and cured in the cavity that is the space formed between the two molds, and the two molds are separated (mold open), and the product molded in the cavity Are taking out.

When a molded product having a boss hole, an undercut portion, etc. is manufactured by injection molding, the boss hole portion, the undercut portion, etc. of the molded product are separated from the movable mold and the fixed mold after injection molding, or It interferes with product removal from the mold. Therefore, in injection molding, the boss hole and the undercut portion are formed by arranging the tip portion at a predetermined position in the cavity when the molten material is injected.
When the mold is opened after the molten material is cured, a slide core is used that is retracted from a predetermined position in the cavity to allow the mold to be separated and the product to be removed. That is, the slide core is slid toward the cavity during injection molding in which the fixed mold and the movable mold are joined and the molten material is injected into the cavity, and the tip portion is moved to the forward position where the tip portion is arranged at a predetermined position in the cavity. Then, when the injection molding is completed and the mold is opened, the mold is slid in the direction away from the cavity, and the tip end portion takes the retracted position retracted from the predetermined position in the cavity. The sliding of the slide core between the forward movement position and the backward movement position is performed by a mechanism such as a cam mechanism or a slide pin mechanism that interlocks with opening and closing of the mold, or a sliding mechanism including a drive device such as a hydraulic cylinder.

[0004]

Here, for example, in a mold for a molded product having an inclined hole portion such as an antenna accommodating portion of a mobile phone body, a slide core is inclined to extend obliquely downward (or upward). Need to move along the route. Since the inclination angle of this inclination path differs for each hole, the slide mechanism for moving the slide core also had to be designed and manufactured for each product according to the inclination angle of the inclination path.
Therefore, in a die having a slide core that slides on an inclined path, not only the slide core but also a slide mechanism for sliding the slide core is designed for each die,
It had to be produced, and there was a problem that these tasks became complicated.

This problem is that the mold block forming the cavity has a replaceable shape, and the mounting part to which the mold block is mounted is made common, so that the mold can be downsized, the cost can be reduced, and the mold can be quickly manufactured. This is a particularly serious problem in so-called cassette molds that aim to improve efficiency and efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a slide core slide mechanism capable of sliding a slide core moving along an inclination path having different inclination angles. And

[0007]

According to the present invention, a slide core having a core portion formed at its tip and capable of reciprocating along an inclined path toward a cavity of a mold is engaged with the slide core. A slide unit for reciprocating the slide core along the inclined path by reciprocating horizontally in the horizontal direction, the slide core having a first engaging portion, and the slide unit having a first 1
A second engaging portion engageable with the engaging portion, wherein the first engaging portion and the second engaging portion allow relative movement in the vertical direction between the slide core and the slide unit. Meanwhile, there is provided a slide core slide mechanism, which is engageable so as to connect the slide unit and the slide core.

The term "horizontal direction" as used herein means a direction parallel to a mold dividing surface of a split mold, and does not mean a horizontal direction when the mold is attached to an injection molding machine. Absent. Further, the vertical direction means a direction orthogonal to the horizontal direction. Therefore, “reciprocating in the horizontal direction” means a movement to move toward and away from the cavity without changing the position (height) in the vertical (height) direction of the cavity.

According to this structure, the slide core and the slide unit that reciprocates (slides) the slide core allow relative movement in the vertical direction between the slide core and the slide unit. And the slide core can be engaged so as to be coupled to each other, so that the slide unit can slide the slide core that slides along the inclination paths of different inclination angles while reciprocating in the horizontal direction. Therefore, the slide cores that slide on the inclination paths having different inclination angles can be slid by the same slide unit.

According to a preferred aspect of the present invention, the second engaging portion has a cross-sectional shape complementary to the first engaging portion.
It is a cutout portion that accommodates the engagement portion slidably in the vertical direction. With such a configuration, the slide core can be easily coupled to the slide unit by accommodating the first engaging portion in the second engaging portion. Further, it is preferable that the first engaging portion includes a first side wall extending in a direction orthogonal to the sliding direction, and the second engaging portion includes a second side wall that engages with the side wall. It is preferable that the second side wall has a length in the vertical direction that is larger than the vertical movement distance of the first engaging portion due to the slide of the slide core.

According to another preferred aspect of the present invention, the first engaging portion is provided at a rear end of the slide core.

According to another preferred aspect of the present invention, the mold includes a replaceable mold block (replaceable part) forming a cavity and a mounting part (common part) to which the mold block is attached. The slide core is arranged in the mold block, and the slide unit is arranged in the mounting portion.

According to such a configuration, designing for each product,
Since it is not necessary to provide a slide unit on the die block (replaceable portion) to be produced, the die block becomes smaller, and further, the die block can be easily designed and produced.

According to another aspect of the present invention, there is provided an inclined path toward a cavity formed between the first and second molds which are movable relative to each other and the joined first and second molds. A slide core reciprocable along the slide core; a slide unit that engages with the slide core and horizontally reciprocates to reciprocate the slide core along the inclined path; and reciprocates the slide unit. An injection molding die including a driving means, wherein the slide core includes a first engaging portion, and the slide unit is engageable with the first engaging portion of the slide core. And prepare for
The first engaging portion and the second engaging portion connect the slide unit and the slide core while allowing the vertical relative movement between the slide core and the slide unit. A mold for injection molding is provided which is characterized by being compatible with each other.

Further, according to a preferable aspect of the present invention, the drive means reciprocates the slide unit independently of the relative movement of the first and second molds.

The first engaging portion or the second engaging portion may be directly formed on the slide unit or the slide core, or may be formed on another member attached to the slide unit or the slide core.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An injection molding die 10 according to a preferred embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic perspective view showing an injection molding die 10 in a mold open state, and FIG. 2 is a schematic perspective view of the injection molding die 10 in a mold clamping state.

As shown in FIGS. 1 and 2, the injection molding die 10 includes a fixed die 12 and a movable die 14. These fixed mold 12 and movable mold 14 have a mold open position (FIG. 1) in which they are separated from each other and a mold clamping position (FIG. 2) in which they are joined to form a cavity corresponding to the product shape. It is mounted on an injection molding machine (not shown) so that it can move between them. Injection mold 10
The injection molding is performed by injecting the molten resin material into the cavity formed between the fixed mold 12 and the movable mold 14 at the mold clamping position, similarly to the known injection molding mold, and then, The movable mold 14 is moved (opened) to the position shown in FIG. 2 so that the cured product is removed from the mold.

Next, the structure of the fixed die 12 will be described. Figure 3
FIG. 4 is a perspective view of the fixed mold 12 in the mold open state, and FIG. 4 is a perspective view of the fixed mold 12 in the mold clamped state. For the sake of clarity, in the drawings of the present application, the shapes of fine parts such as the concave-convex shape forming the cavity and the tip shape of the slide core are
It is simplified as appropriate.

As shown in FIGS. 3 and 4, the fixed die 12 includes a base plate 16 having a substantially rectangular shape.
Near the four corners of the base plate 16, a substantially cylindrical guide bush 18 is attached. Further, in the central region of the base plate 16, a fixed-side cassette mold 20 that is detachable in a cassette manner is arranged. Therefore, the base plate 16 and the like serve as a common portion of the cassette-type mold 10.

FIG. 5 is a perspective view showing a schematic structure of the fixed-side cassette mold 20 which is a replaceable part. As shown in FIG. 5, the fixed-side cassette mold 20 includes a substantially rectangular fixed-type cassette mounting plate 22 and a cabinet block 24 arranged at a substantially central position on the fixed-type cassette mounting plate 22. ing.

The cabinet block 24 is a main part of a mold that forms a cavity together with a core block described later,
It is made of a metal material suitable for the mold. Further, the cabinet block 24 is, for example, cut based on the shape data of the product manufactured by injection molding, and the unevenness corresponding to the product shape is formed on the surface thereof. In this embodiment, the injection-molding die 10 is a die for injection-molding the back side part of the body of the mobile phone, and the mold block 2 is used.
On the surface of No. 4, unevenness corresponding to the shape of the back side part of the body of the mobile phone is formed. 3 to 5, the surface shape of the mobile phone is schematically shown by a dotted line for clarity.

Fixed-side cassette-side slides (slide units) 26a, 26b, 26c, and 26d are arranged on the outer sides of the four sides of the cabinet block 24, respectively. The cassette-side slide 26a and the like are rod-shaped members that extend along one side of the cabinet block 24, and have a groove 27 that opens downward at the outer position.

These cassette side slides 26a, 26
b, 26c, and 26d are the cabinet blocks 24, respectively.
Are arranged so as to extend in parallel along each side of the. Also, cassette side slides 26a, 26b, 26c, 26
d is the retracted position (FIG. 3) away from the cabinet block 24 in the direction orthogonal to the sides of the cabinet block 24 while maintaining the parallel state with the sides of the cabinet block 24, respectively. It is configured to be able to reciprocate in the horizontal direction along the mold dividing surface between the approaching forward position (FIG. 4).

Each cassette side slide 26a, 26b, 2
6c and 26d slide at slide positions on the slide guides 28a, 28b, 28c, and 28d attached to the fixed type cassette attachment plate 22 at the outer peripheral position of the cabinet block 24 so that they are moved to the retracted position (FIG. 3). It is configured to be movable to and from the forward position (FIG. 4).

Among the slides on the cassette side, the slide 26a located on the upper side of the mobile phone body has a core mounting member 25 for mounting a slide core Sa for forming a hole for an antenna accommodating portion on the mobile phone body. Is screwed on. Since the hole extends from the top of the mobile phone body toward the bottom inwardly in the thickness direction of the body, the slide core Sa for forming the hole is formed in the cavity block. 24 is arranged so as to be inclined upward in the thickness direction (surface direction). Further, the slide path 2 is formed on the peripheral portion of the cabinet block 24, along which the slide core Sa slides.
4a also goes inward from the outer edge of the cabinet block 24,
It is an inclined path that inclines upward in the thickness direction (surface direction) of the cabinet block 24. Therefore, the rear end portion of the slide core Sa moves in the vertical direction (thickness direction of the cabinet block) along with the movement of the slide core Sa along the inclined path, and the slide 26a moves to the retracted position (FIG. 3).
When it is taken, it is located below (below the thickness direction of the cabinet block) than when it is taken in the forward position (FIG. 4).

The rear end of the slide core Sa and the core mounting member 25 mounted on the cassette side slide 26a are
The slide core Sa and the slide unit 26a are connected so as to allow relative movement in the vertical direction (the thickness direction of the cabinet block 24). The connection between the slide core Sa and the core mounting member 25 will be described later with reference to FIG.

Other cassette side slides 26b, 26c,
If necessary, one or two or more slide cores (side cores) S for forming an undercut portion, a boss hole, etc. are attached to the 26d by screws or the like. The slide core (side core) S has a tip having a shape corresponding to an undercut portion, a boss hole, etc. to be formed, and at least the tip portion is arranged at a predetermined position in the cavity during die bonding, It is configured to form an undercut portion, a boss hole, etc. in the molded product. In the present embodiment, all the slide cores of the fixed mold 12 that are moved from the outside of the cavity toward the inside of the cavity at the time of joining are connected to the cassette-side slides 26a, 26b, 26c, and 26d. Depending on the shape of the molded product, the slides 26a, 26 on the cassette side to which the slide core cannot be attached are attached.
b, 26c, 26d may be present.

Cassette side slides 26a, 26b, 26
c, 26d and the slide cores attached thereto are cassette side slides 26a, 26b, 26c, 26.
When d is in the forward position, the slide core is arranged in the cavity forming the undercut portion, the boss hole and the like in the injection molded product, and the cassette side slides 26a, 26
When b, 26c and 26d are in the retracted position, the slide core is retracted to a position where the mold can be opened and the injection molded product can be removed from the mold.

Further, guide pins 30 having a substantially cylindrical shape are attached near the four corners of the fixed type cassette attachment plate 22. Further, a plurality of mounting holes 32 for mounting the cab block to the fixed cassette mounting plate 22 and the like are provided in the peripheral portion of the cab block 24.

As shown in FIGS. 3 and 4, at the position around the fixed-side cassette die 20 of the fixed die 12, a base-side slide (slide unit) 34a for the fixed die,
34b, 34c, 34d are movably attached. Base side slides 34a, 34b, 34c, 34d
Are configured to respectively correspond to the cassette side slides 26a, 26b, 26c and 26d of the fixed side cassette mold 20. Base side slides 34a, 34b,
34c and 34d are respectively cassette side slide 2
6a, 26b, 26c, 26d having a length substantially equal to
The cassette-side slides 26a, 26b, 26c, and 26d are provided with protrusions shaped to engage with the grooves.

When the cassette mold 20 is attached to the base plate 16 side, the base side slides 34a, 34b, 34
The protrusions of c and 34d are the cassette side slides 26a and 2d.
6b, 26c, 26d in the groove portion, respectively,
Engage, cassette side slides 26a, 26b, 26c,
26d respectively include base side slides 34a, 34
It comes to move integrally with each of b, 34c, and 34d.

Furthermore, the base side slides 34a, 34
The locking blocks 35a, 34c, 34d are provided behind the locking cassettes 35a,
35b, 35c, 35d are attached. The locking blocks 35a, 35b, 35c, 35d engage with the base side slide on the movable die 14 side during mold clamping, and block the movement of the slide in the direction away from the cavity.

Hydraulic cylinder units 36 shown by dotted lines are attached to the outer surfaces of the sides of the base plate 16, respectively. The rod of each cylinder unit 36 extends into the base plate 16 through rod holes 16a (only two are shown) provided in the base plate 16 in a direction orthogonal to each side of the cabinet block 24, and slides on the base side 34a, 34a.
It is connected to b, 34c, and 34d. With this configuration, as the rod of the hydraulic cylinder expands and contracts, the base-side slides 34a, 34b, 34c, and 34d move in a direction orthogonal to each side of the cabinet block 24.
The hydraulic cylinder 36 is connected to a control device (not shown) of the injection molding machine, and its operation is controlled by this control device.

As described above, in the present embodiment, the base side slides 34a,
34b, 34c, 34d, the cassette side slides 26a, 26b, 26c, 26d engaged with them, and the cassette side slides 26a, 26b, 26c, 2
The slide core attached to 6d is moved horizontally from the retracted position to the advanced position as shown by arrow A in FIG. 3 and from the advanced position to the retracted position as shown by arrow B in FIG. It is configured to be.

In this embodiment, each hydraulic cylinder 36 is
Since it operates completely independently of the movement of other hydraulic cylinders and the movement of the movable die 14, the base side slides 34a, 3
4b, 34c, 34d, cassette side slides 26a, 2
6b, 26c, 26d, and further, the slide core moves the other slide cores and the movable die 14, that is,
Clamping / mold opening operation (opening / closing operation) of the injection molding die 10
Moved, completely independent of.

Next, the structure of the movable die 14 will be described. Figure 6
Is a perspective view of the movable die 14 in the mold open state, and FIG. 7 is a perspective view of the movable die 14 in the mold clamped state. As shown in FIGS. 6 and 7, the movable die 14 includes a base plate 38 having a substantially rectangular shape. Guide pins 40 are attached near the four corners of the base plate 38 at positions corresponding to the fixed, substantially cylindrical guide bushes 18. Also,
In the center area of the base plate 38, a movable cassette die 42 that can be detached in a cassette manner is arranged.

FIG. 8 is a perspective view showing a schematic structure of the moving-side cassette mold 42. As shown in FIG. 8, the moving-side cassette mold 42 includes a substantially rectangular receiving plate 44.
And a core block 46 arranged at a substantially central position on the receiving plate 44.

The core block 46 is a main part of a mold which is joined to the above-mentioned cabinet block 24 and forms a cavity which is a molding space, and is made of a metal material suitable for the mold. Further, the core block 46 is, for example, cut based on the shape data of the product manufactured by injection molding, and unevenness corresponding to the product shape is formed on the surface thereof. As described above, in this embodiment, the injection-molding die 10 is a mold for injection-molding the back side component of the body of the mobile phone, and the core block 26 also has a back side component of the body of the mobile phone on the surface thereof. The unevenness corresponding to the shape is formed. 6 to 8, the surface shape of the mobile phone is schematically shown by a dotted line for clarity.

Movable cassette side slides (slide units) 48a, 48b, 48c and 48d are arranged at the outer positions of the four sides of the cabinet block 46, respectively. The cassette-side slide 48a and the like are rod-shaped members that extend along one side of the core block 46, and have a groove 49 that opens downward at the outer position.

These cassette side slides 48a, 48
b, 48c, and 48d are arranged so as to extend in parallel along each side of the core block 46. Also, cassette side slides 48a, 48b, 48c, 48
d is a direction orthogonal to each side of the core block 46, and a retracted position (FIG. 6) separated from the core block 46 while maintaining a parallel state with each side of the core block 46.
It is configured to be movable between an advanced position (FIG. 7) close to the core block 46.

Each cassette side slide 48a, 48b, 4
8 c and 48 d are slide guides 50 a, 50 b and 5 attached to the receiving plate 44 at the outer peripheral position of the core block 46.
It is configured so that it can be moved between the retracted position (FIG. 6) and the advanced position (FIG. 7) by sliding on the sliding paths on 0c and 50d.

Cassette side slides 48a, 48b, 48
A slide core S for forming an undercut portion, a boss hole or the like is attached to one or more of the c and 48d by screws or the like, if necessary. In the present embodiment, all slide cores of the movable die 14 that are moved from the outside of the cavity toward the inside of the cavity at the time of joining are connected to the cassette-side slides 48a, 48b, 48c, and 48d. Depending on the shape of the molded product, the slides 46a, 46 on the cassette side to which the slide core cannot be attached are attached.
b, 46c, 46d may be present.

Cassette side slides 48a, 48b, 48
c, 48d and the slide cores attached thereto are cassette side slides 48a, 48b, 48c, 48.
When d is in the forward position, the slide core is placed in the cavity forming the undercut portion, the boss hole and the like in the injection molded product, and the cassette side slide 48a,
When the slide cores 48b, 48c, and 48d are in the retracted position, the slide core is retracted to a position where the mold can be opened and the injection molded product can be removed from the mold.

Further, guide bushes 52 for accommodating the guide pins 30 of the stationary cassette mold are attached near the four corners of the receiving plate 44. Further, the core block 46
A plurality of attachment holes 54 for attaching the core block 46 to the receiving plate 44 and the like are provided in the peripheral edge portion of the.

The moving-side cassette mold 42 includes an ejector guide pin 55 for guiding an ejector pin (not shown) for pushing out a cured molded product, an ejector plate 56 for guiding and supporting the ejector guide pin 55, and And an ejector support plate 58. When the injection molding is completed, the ejector plate 56 receives the receiving plate 4
4 toward the core block 46
An ejector pin is protruded from an ejector hole (not shown) formed in the core block 46 to cure the cured molded product.
It is configured to be removed from.

As shown in FIGS. 6 and 7, at the periphery of the moving side cassette die 42 of the moving die 14, a base side slide (slide unit) 60a for the moving die,
60b, 60c and 60d are movably attached. Base side slides 60a, 60b, 60c, 60d
Are configured to correspond to the cassette-side slides 48a, 48b, 48c, and 48d of the moving-side cassette mold 42, respectively. Base side slides 60a, 60b,
Each of 60c and 60d has a slide 4 on the cassette side.
The cassette side slides 48a, 48b, 48c, 48 have substantially the same length as 8a, 48b, 48c, 48d.
It is provided with a protrusion having a shape that meshes with the groove 49 formed in d.

When the moving side cassette mold 42 is attached to the base plate 38 side, the base side slides 60a, 60b,
60c, 60d are cassette side slides 48a, 48
The cassette side slides 48a, 48b, 48 are engaged with the groove portions 49 formed in the b, 48c, 48d, respectively.
c and 48d are base side slides 60a and 6d, respectively.
It becomes possible to move integrally with each of 0b, 60c, and 60d.

Further, the base side slides 60a, 60
Locking blocks 62a, 60c, and 60d are provided at the rear side, that is, at the position opposite to the moving side cassette mold 42.
62b, 62c and 62d are attached. The locking blocks 62a, 62b, 62c, 62d are used for the base side slides 34a, 34 of the fixed mold 12 during mold clamping.
base side slides 34a, 34b, 34c, 3 in the direction away from the cavity by engaging with b, 34c, 34d.
Block 4d movement.

Hydraulic cylinder units 64 indicated by dotted lines are attached to the outer surface of each side of the base plate 38. The rod of each cylinder unit 64 extends into the base plate 38 in the direction orthogonal to each side of the core block 46 through the rod holes 38a (only two are shown) provided in the base plate 38, and the base side slides 60a and 60b. ,
It is connected to 60c and 60d. With this configuration, as the rod of the hydraulic cylinder expands and contracts, the base side slides 60a, 60b, 60c, and 60d move to the core block
Will move in a direction orthogonal to each side of. The hydraulic cylinder 64 is connected to a control device (not shown) of the injection molding machine, and its operation is controlled by this control device.

As described above, in this embodiment, the base side slides 60a, 60b and 6 are moved by the hydraulic cylinder 64.
0c, 60d, the cassette side slides 48a, 48b, 48c, 48d engaged therewith, and the slide cores attached to the cassette side slides 48a, 48b, 48c, 48d are indicated by an arrow C in FIG. Thus, it is configured to be moved from the retracted position to the advanced position, and from the advanced position to the retracted position as indicated by an arrow D in FIG. 7.

In this embodiment, each hydraulic cylinder 64 is
Since it operates completely independently of the movements of the other hydraulic cylinders and the movement of the movable die 14, the base side slides 60a, 6
0b, 60c, 60d, cassette side slides 48a, 4
8b, 48c, 48d, and further, the slide core moves the other slide cores and the movable die 14, that is,
The injection mold 10 can be moved completely independently of the mold clamping and mold opening (opening / closing) operations.

Next, the connecting structure of the slide core Sa for forming the hole for accommodating the antenna and the core mounting member 25 connected to the slide core Sa will be described in detail with reference to FIG. . FIG. 9 shows the slide core S.
It is an exploded perspective view showing the 1st engaging part of the rear end part of a, and the 2nd engaging part of core attaching member 25 with which this 1st engaging part engages (links).

As shown in FIG. 9, the core mounting member 25 has a screw hole 25a and a slide unit 26a.
Like the other slides S, they are screwed. The core attachment member 25 includes a T-shaped notch portion (second engagement portion) 66.
Are formed.

A slide core S which is a rod-shaped body having a rectangular cross section
The rear end portion of a is notched in a rectangular parallelepiped shape from both side surfaces at a position separated from the rear end surface by a predetermined distance, and has a T-shaped cross-sectional shape complementary to the cross-sectional shape of the second engaging portion 66. It is the first engaging portion 68. As described above, since the slide core Sa is disposed in the inclined state on the inclined path 24a, the T-shaped first engaging portion 68 formed on the rear end portion and each outer wall thereof are also divided by the mold. It is inclined from the direction orthogonal to the plane.

The inner wall of the T-shaped notch (second engaging portion) 66 formed in the core mounting member 25 also has the T-shaped first portion.
It is formed so as to correspond to the inclination of each outer wall of the engaging portion 68. As a result, the first engaging portion 68 and the second engaging portion 6
6 means that when the slide core Sa is arranged in an inclined state along the inclined path 24a, the side wall (outer wall) of the first engaging portion 68 and the inner wall of the cutout portion 66 extend in the same direction, and are vertically moved from each other. It is configured to be slidably fitted in the direction.

The first engaging portion 68 extends in the direction orthogonal to the sliding direction of the slide unit 26a and the slide core Sa on the back surface of the portion of the "T" extending laterally.
It has a side wall 68a. When the first engaging portion 68 and the second engaging portion 66 are engaged, the side wall (second side wall) 6 that constitutes the back surface of the portion of the second engaging portion 66 that extends laterally in the “T” shape.
6a engages the first side wall 68a. The second side wall 66a of the second engaging portion 66 has a vertical length (height) that is larger than the vertical moving distance of the first engaging portion 68 due to the sliding of the slide core Sa. With such a configuration, when the slide unit 26a reciprocates in the horizontal direction, the slide core Sa slides the first engaging portion 68 in the second engaging portion 66 of the core mounting member 25 in the vertical direction, It will slide along an inclined path. in this way,
The first engaging portion and the second engaging portion allow the slide unit 26a and the slide core Sa to be coupled while allowing relative movement in the vertical direction between the slide core Sa and the slide unit 26a.

Next, the positional relationship between the first engaging portion 68 and the second engaging portion 66 as the slide unit 26a and the slide core Sa slide will be described with reference to FIGS. FIG. 10 is a schematic cross-sectional view along the sliding direction of the slide core Sa when the slide unit 26a and the slide core Sa take the forward position, and FIG. 11 is a slide unit 26a and the slide core Sa.
FIG. 9 is a schematic cross-sectional view taken along the sliding direction of the slide core Sa when the retracted position is taken.

When the slide unit 26a is moved by the engagement of the first engaging portion 68 and the second engaging portion 66, the slide core Sa is also moved (slide) integrally. At this time, the first engaging portion 68 is the second engaging portion 66.
By sliding in the up and down direction inside, the up and down displacement due to the oblique movement of the slide core Sa is absorbed. That is, when the slide unit 26a and the slide core Sa retract from the forward position shown in FIG. 10 in the arrow F direction and move to the retracted position shown in FIG. 11, the first engaging portion 68 of the slide core Sa is The second engaging portion 66 of the attachment member 25 moves downward in the direction indicated by the arrow G. It should be noted that when moving from the backward position to the forward position, the reverse movement is performed. In this way, the slide core Sa and the slide unit 26a are connected in a state where relative movement in the vertical direction is allowed.

Next, referring to FIGS. 12 to 15, the movements of the other slide cores S and the like in the injection molding die 10 will be specifically described. 12 to 15 are schematic cross-sectional views of the fixed mold and the movable-side cassette molds 20 and 42.

FIG. 12 is a schematic sectional view of the fixed mold and movable cassette molds 20 and 42 which are in a joined state after injection molding is completed. In this state, the fixed mold 12 and the movable mold 14 are completely joined (FIG. 2), and the resin injected into the cavity (space) corresponding to the product shape formed between the cabinet block 24 and the core block 46. Is a molded product P. In the injection molding die 10, all the slide pieces are shown in FIG. 4 by the cassette side slides 26 and 48, the base side slide, and the hydraulic cylinder independently of the movement of the movable die when the die is clamped. Place it in the forward position as shown.

When the molded product P is cured, all the slide pieces are returned to the retracted position by the hydraulic cylinders before being separated from the fixed mold 12 of the movable mold 14, that is, before opening the mold (FIG. 13). Speed, amount of slide slide backward,
Also, the timing can be freely set for each hydraulic cylinder.

When the slide piece retracts, the movable die 14 is moved in the direction of the arrow H to separate it from the fixed die 12,
The mold is opened (Fig. 14).

Finally, the molded product P is ejected by an ejector pin (not shown) and removed from the core block (FIG. 15). In the illustrated example, the undercut portion formed inside the molded product P is configured to be pulled out by the inclining pin K that moves inward.

The present invention is not limited to the above-described embodiments, but various changes and modifications can be made within the scope of the matters described in the claims.

In the above embodiment, the inner wall of the T-shaped notch (second engaging portion) 66 formed in the core mounting portion 25 is inclined with respect to each outer wall of the T-shaped first engaging portion 68. However, the inner wall may be arranged in a direction orthogonal to the mold dividing surface. in this case,
The rear end portion of the slide core Sa is bent from the axis of the slide core Sa to dispose the outer wall of the first engaging portion 68 in a direction orthogonal to the mold dividing surface, and the slide core Sa is inclined to the inclination path 24a. When it is arranged in, the side wall (outer wall) of the first engaging portion 68 and the inner wall of the notch portion 66 extend in the same direction, and are configured to be vertically slidable with respect to each other. In this way, the core mounting member 25 does not need to be designed and manufactured for each slide core, and can be standardized.

Further, the slide mechanism and the injection molding die of the present invention are applicable not only to a die for injection molding using a resin such as plastic, but also to a die for injection molding using another material such as metal. Applied.

[0068]

According to the present invention, there is provided a slide core sliding mechanism capable of sliding a slide core that moves along inclination paths having different inclination angles.

[Brief description of drawings]

1 is a schematic perspective view showing an injection mold according to an embodiment of the present invention in a mold open state,

FIG. 2 is a schematic perspective view of an injection mold according to an embodiment of the present invention in a mold clamped state.

FIG. 3 is a perspective view of a fixed mold in a mold open state.

FIG. 4 is a perspective view of a fixed mold in a mold clamped state.

FIG. 5 is a perspective view showing a schematic configuration of a fixed-side cassette mold.

FIG. 6 is a perspective view of a movable mold in a mold open state.

FIG. 7 is a perspective view of the movable mold in a mold clamped state.

FIG. 8 is a perspective view showing a schematic configuration of a moving-side cassette mold.

FIG. 9 is an exploded perspective view showing a first engaging portion and a second engaging portion.

FIG. 10 is a schematic cross-sectional view of a slide core and the like in a forward position.

FIG. 11 is a schematic sectional view of a slide core and the like in a retracted position.

FIG. 12 is a cross-sectional view illustrating the movement of a slide core or the like in the injection molding die according to the embodiment of the present invention.

FIG. 13 is a cross-sectional view illustrating the movement of a slide core or the like in the injection molding die according to the embodiment of the present invention.

FIG. 14 is a cross-sectional view illustrating the movement of a slide core or the like in the injection molding die according to the embodiment of the present invention.

FIG. 15 is a cross-sectional view illustrating the movement of a slide core or the like in the injection molding die according to the embodiment of the present invention.

[Explanation of symbols]

10: Mold for injection molding 12: Fixed type 14: Mobile 20: Fixed-side cassette mold (cabinet) 25: Core mounting member 26a, 26b, 26c, 26d: cassette side slide 34a, 34b, 34c, 34d: Base side slide 36: Hydraulic cylinder unit 42: Moving side cassette mold (core) 46: Core block 48a, 48b, 48c, 48d: cassette side slide 60a, 60b, 60c, 60d: Base side slide 64: Hydraulic cylinder unit 66: Notch portion (second engaging portion) 68: First engaging portion

Claims (6)

[Claims] 1. A slide core having a core portion formed at a tip thereof and capable of reciprocating along an inclined path toward a cavity of a mold; and a slide core engaging with the slide core and reciprocating in a horizontal direction, A slide unit that reciprocates the slide core along the inclined path, the slide core includes a first engaging portion, and the slide unit is engageable with the first engaging portion of the slide core. Two engaging portions, wherein the first engaging portion and the second engaging portion allow relative movement in the vertical direction between the slide core and the slide unit, and the slide unit and the slide core. A slide mechanism of a slide core, wherein the slide mechanism is engageable so as to connect with each other. 2. The second engaging portion is a cutout portion having a cross-sectional shape complementary to the first engaging portion and accommodating the first engaging portion slidably in the vertical direction. The slide mechanism of the slide core according to claim 1. 3. The slide core slide mechanism according to claim 1, wherein the first engaging portion is provided at a rear end of the slide core. 4. The mold is a cassette type mold including a replaceable mold block forming a cavity and a mounting portion to which the mold block is mounted, and the slide core is mounted on the mold block. The slide mechanism of the slide core according to claim 1, wherein the slide unit is arranged, and the slide unit is arranged in the mounting portion. 5. A slide capable of reciprocating along first and second molds that can move relative to each other and an inclined path toward a cavity formed between the joined first and second molds. An injection including a core, a slide unit that engages with the slide core and reciprocates in the horizontal direction to reciprocate the slide core along the inclined path, and a drive unit that reciprocates the slide unit. A molding die, wherein the slide core includes a first engaging portion, the slide unit includes a second engaging portion that is engageable with the first engaging portion of the slide core, and the first engaging member The mating portion and the second engaging portion are engageable so as to connect the slide unit and the slide core while allowing relative movement in the vertical direction between the slide core and the slide unit. thing A mold for injection molding. 6. The injection-molding die according to claim 5, wherein the driving means reciprocates the slide unit independently of relative movement of the first and second dies.