JP5804651B2 - Undercut processing mechanism - Google Patents

Description

  The present invention relates to an undercut processing mechanism that enables separate undercut portions in a molded product to be removed when the molded product is die-cut in a molding tool for molding a molded product with a fixed mold and a movable mold. .

  Conventionally, as this type of molding die device, for example, a loose core ejector device described in Patent Document 1 is known. That is, it is locked to a mold core that forms the inner surface of the molded product, a movable loose core support rod that penetrates the core and is inclined with respect to the core surface, a movable mold plate, and a pedestal plate. And a slide base disposed in the slide path of the ejector plate so as to be slidable relative to the guide means rod, and the loose core support rod is interlocked with the movement of the slide base. .

  In such a loose core ejector device, one end of the guide means rod is locked to a holder that is tightly fitted in a recess formed in the lower surface of the movable side template, and the loose core support rod is attached to the core. The insertion hole formed at substantially the same inclination angle as that of the guide means rod is slidably inserted, and this insertion hole is the only angle setting hole for setting the inclination angle of the loose core support rod.

JP 2002-326233 A

  However, in the conventional technique as described above, not only the loose core support rod but also the guide means rod are inclined, and the mechanism for moving each rod at the same inclination angle is the ejector plate and the movable side type. It is comprised so that it may disperse | distribute to a board. Therefore, a large installation space is required compared to the amount of movement of the piece with the undercut part shape necessary for die-cutting of the undercut part of the molded product, and the overall structure is complicated, requiring time and labor for assembly. There was a problem that it was difficult to reduce costs.

  In addition, it is possible to cope only with the case where the undercut portion is located in one direction on the outside or inside of the molded product. For example, the molded product has two undercut portions separately, and each undercut portion When the escape directions are different from each other, it is impossible to punch such a molded product. Therefore, in addition to the shape of the undercut portion in the moldable molded product, there is a problem that the position and number are limited to a very narrow range.

  The present invention has been made paying attention to the problems of the prior art as described above, can be configured compactly, can meet the demand for space saving, and can be processed and incorporated into a mold. The cost can be reduced and the molded product can be easily punched even when there are two separate undercut parts in the molded product and the escape directions of each undercut part are different. The object is to provide an undercut processing mechanism.

The gist of the present invention for achieving the object described above resides in the inventions of the following items.
[1] In a molding die apparatus (1) for molding a molded product (P) with a fixed mold (11) and a movable mold (12), when the molded product (P) is removed from the molded product (P), In the undercut processing mechanism that allows each separate undercut part (P1, P2) to be removed,
A plurality of undercut molding cores (60, 70) respectively corresponding to the separate undercut portions (P1, P2) and only one of the fixed mold (11) and the movable mold (12) And a holder (40, 50) for assembling the plurality of undercut molding cores (60, 70) , provided at a position not touching the molded product (P) ,
When the molded product (P) is molded, the plurality of undercut molded cores (60, 70) each have an outer wall surface that is higher than the holder (40, 50) and matches the inside of the molded product (P). the separate undercut portion and (P1, P2) first molding core which is held in the molding position corresponding to one of (60), a second molding core which is held in the molding position corresponding to the other (70) And comprising
When the molded product (P) is die-cut, the first molded core (60) moves in the escape direction away from one of the plurality of undercut portions (P1, P2), and the second molded core (70). The first molded core (60) moves in the escape direction, and then moves in an inclined direction in which the die-cutting direction is combined with the escape direction that escapes from the other of the undercut portions (P1, P2). An undercut processing mechanism characterized by being assembled to a holder (40, 50).

[2] It has a base (13) that can be pulled out in the direction opposite to the mold drawing direction with respect to the movable mold (12) provided integrally with the holder (40, 50),
Below the base stand (13), a first push-up member (14) that keeps the movable die (12) at a fixed position in the die-drawing direction, and below the pull-out position after the base stand (13) is pulled out. A second push-up member (15) that protrudes in the die-cutting direction toward the base table (13).
The base pedestal (13) is integrally extended to the inside of the holder (40, 50), and the holder (40, 50) is moved in the direction opposite to the mold drawing direction as the base pedestal (13) is pulled out. A first support member (20) that moves relative to each other and movably connects the first molded core (60);
The second push-up member (15) can move in the die-cutting direction in the holder (40, 50) in accordance with the protruding operation, and the second molding core (70) can be moved via the connecting member (80). A second support member (30) connected to the
The first molded core (60) is pushed and pulled as the first support member (20) moves in the holder (40, 50) in the direction opposite to the die-cutting direction, and the holder (40 , 50) is coupled to the first support member (20) so as to be interlocked with the escape direction in
The second molded core (70) is integrally supported by the distal end portion of the connecting member (80) outside the holder (40, 50), and the base end portion of the connecting member (80) (40, 50) connected to the distal end portion of the second support member (30) so as to be movable in the escape direction,
A first guide for guiding the first molded core (60) along the clearance direction is provided in the holder (40, 50) in accordance with the drawing operation of the base table (13), and the second push-up is performed. The undercut processing mechanism according to [1], wherein a second guide that guides the connecting member (80) along the inclined direction is provided along with the protruding operation of the member (15).

[3] The holder (40, 50) is formed separately for each of the molding cores (60, 70), the first holder (40) for assembling the first molding core (60), and the second molding. A second holder (50) for assembling the core (70),
The undercut processing mechanism according to [2], wherein the first guide is provided in the first holder (40), and the second guide is provided in the second holder (50).

[4] The first molded core (60) is guided in the first holder (40) to either the inner wall of the first holder (40) or the outer wall of the first molded core (60). Providing a first lateral groove (41) extending in the escape direction;
In either one of the above, a first horizontal strip (64) that extends in the escape direction and is slidably fitted in the first lateral groove (41) is provided,
The undercut processing mechanism according to [3], wherein the first horizontal groove (41) or the first horizontal strip (64) on the inner wall of the first holder (40) is the first guide. .

[5] The connecting member (80) extends in the inclined direction guided in the second holder (50) on either the inner wall of the second holder (50) or the outer wall of the connecting member (80). Providing a second oblique groove (51);
On either one of them, a second oblique line (83) that extends in the inclined direction and fits slidably into the second oblique groove (51) is provided,
[3] or [4], wherein the second guide groove is the second oblique groove (51) or the second oblique line (83) on the inner wall of the second holder (50). Undercut processing mechanism.

  [6] The holder (40, 50) itself is configured as a part of the movable mold (12) or the fixed mold (11) provided with the holder (40, 50) [1], The undercut processing mechanism according to [2], [3], [4] or [5].

The present invention operates as follows.
The undercut processing mechanism according to [1] has a plurality of undercut molding cores (60, 70) respectively corresponding to the separate undercut portions (P1, P2) in the molded product (P). . The plurality of undercut molding cores (60, 70) are held at a molding position corresponding to one of the separate undercut portions (P1, P2) during molding of the molded product (P). ) And a second molded core (70) held in a molding position corresponding to the other.

  The 1st shaping | molding core (60) and the 2nd shaping | molding core (70) are each assembled | attached so that a movement with respect to the holder (40, 50) separately. When the molded product (P) is die-cut, the first molded core (60) moves in the escape direction away from the one undercut portion (P1) from the molding position. Subsequently, after the first molded core (60) has moved in the escape direction, the second molded core (70) has a die cutting direction synthesized in the escape direction away from the other undercut part (P2). Move in the tilt direction.

  Here, the escape direction from each undercut part (P1, P2) is not limited to the direction perpendicular to the die-cutting direction, and may be any direction that intersects the die-cutting direction. For this reason, the present invention is not limited to the undercut portions (P1, P2) having a shape that extends in a direction perpendicular to the die-cutting direction, and can correspond to various shapes of the undercut portions (P1, P2). .

  In addition, the first molded core (60) and the second molded core (70) move from the molding position to the mold release position at two stages, not simultaneously, and also move in different directions. As a result, the molded product (P) has two undercut portions (P1, P2) separately, and even if it is completely different from the escape direction of each undercut portion (P1, P2), it is easy without forcibly removing it. Can be pulled out.

  Furthermore, the first molded core (60) and the second molded core (70) are fixed to the movable mold (11) or movable via the holder (40, 50) without being dispersed on the ejector base plate or movable mold (12). It can be concentrated on only one of the molds (12). As a result, a compact configuration can be achieved, a space-saving request can be met, and processing and incorporation into a mold are facilitated.

  According to the undercut processing mechanism described in [2] above, the holder (40, 50) is provided integrally with the movable mold (12), and the movable mold (12) (including the holder (40, 50)). On the other hand, the base stand (13) is arranged so as to be able to be pulled out in the direction opposite to the mold drawing direction. Below the base table (13), the first push-up member (14) that keeps the movable mold (12) at a fixed position in the mold drawing direction, and after the drawing operation of the base table (13), from below the drawing position. A second push-up member (15) that protrudes in the die-cutting direction toward the base table (13) is provided.

  The base pedestal (13) extends integrally into the holder (40, 50), and the holder (40, 50) is relatively moved in the direction opposite to the mold drawing direction as the base pedestal (13) is pulled out. The 1st supporting member (20) which moves to is provided. A first molded core (60) that fits in the holder (40, 50) is movably connected to the first support member (20). Here, the first molded core (60) is pushed and pulled in accordance with the relative movement of the first support member (20) in the holder (40, 50) in the direction opposite to the mold release direction, and the holder (40, 50). ) Will be linked to the escape direction.

  The second push-up member (15) is placed, for example, on the first push-up member (14). Further, the second push-up member (15) is provided with a second support member (30) that moves in the mold-release direction in the holder (40, 50) in accordance with the protruding operation.

  The 2nd shaping | molding core (70) is connected with the 2nd support member (30) through the connection member (80) so that a movement is possible. Here, the second molded core (70) is integrally supported by the distal end portion of the connecting member (80) outside the holder (40, 50), and the base end portion of the connecting member (80) is supported by the holder (40, 50). 50) is connected to the distal end portion of the second support member (30) so as to be movable in the escape direction.

  In such a configuration, when the molded product (P) is die-cut, first, the base table (13) is pulled out and moved in the direction opposite to the die-drawing direction with respect to the movable die (12). The relative positional relationship between the holder (40, 50) provided integrally with the first support member (20) fixed on the base table (13) changes. That is, the first support member (20) on the base table (13) relatively moves in the reverse direction of the die-cutting direction so as to come out from the holder (40, 50) moving in the die-cutting direction.

  The first molded core (60) is pushed and pulled by the first support member (20) as the relative position of the first support member (20) changes in the holder (40, 50). At this time, the first molding core (60) moves while being guided from the molding position to the release position along the escape direction by the first guide in the holder (40, 50).

  Subsequently, the second push-up member (15) projects and the second support member (30) moves in the die-cutting direction. And the connection member (80) connected with the front-end | tip part of a 2nd support member (30) is guided to the inclination direction by the 2nd guide in a holder (40,50). At this time, the second molding core (70) integrally supported by the tip of the connecting member (80) outside the holder (40, 50) moves from the molding position to the mold release position along the escape direction. become.

  Thereby, the 1st shaping | molding core (60) and the 2nd shaping | molding core (70) can be shifted to a mold release position in a different direction from each shaping | molding position, shifting in two steps. According to such an undercut processing mechanism, the overall structure can be simplified, and the manufacturing cost can be greatly reduced. In addition, a more compact configuration is possible, and processing and incorporation into the mold are further facilitated.

  The number of the holders (40, 50) is not necessarily one. As described in [3] above, the holders (40, 50) are separately formed for each of the molded cores (60, 70), and the first molded core (60 ) May be divided into a first holder (40) for assembling and a second holder (50) for assembling the second molded core (70).

  In such a case, the first guide is provided in the first holder (40), while the second guide is provided in the second holder (50). By separating the holders (40, 50) as described above, the holders (40, 50) can be arranged at positions away from each other with respect to the movable mold (12), and can correspond to a plurality of various undercut portions (P1, P2). It becomes possible to make it.

  According to the undercut mechanism described in [4] above, the first molded core (60) is placed on the first holder on either the inner wall of the first holder (40) or the outer wall of the first molded core (60). A first lateral groove (41) extending in the escape direction guided in (40) is provided, and a first lateral groove that extends in the escape direction and is slidably fitted into the first lateral groove (41) is provided on either one of them. Article (64) is provided.

  And let the 1st horizontal groove (41) or 1st horizontal strip (64) of the one in a 1st holder (40) be a 1st guide. Due to the fitting relationship between the first lateral groove (41) and the first lateral strip (64), the first molded core (60) can be reliably guided in the escape direction with respect to the first holder (40). In addition, the first guide can be configured easily.

  According to the undercut processing mechanism described in [5], the connecting member (80) is placed in the second holder (50) on either the inner wall of the second holder (50) or the outer wall of the connecting member (80). The second oblique groove (51) extending in the inclined direction guided by the second inclined groove (51) extending in the inclined direction and fitted to the second oblique groove (51) so as to be slidable ( 83).

  The second oblique groove (51) or the second oblique line (83) on the second holder (50) is used as the second guide. Due to the fitting relationship between the second oblique groove (51) and the second oblique line (83), the second molded core (70) can be reliably guided in the inclined direction via the connecting member (80). And the 2nd guide can be constituted simply.

  According to the undercut processing mechanism described in [6] above, the holder (40, 50) itself is configured as a movable mold (12) or a fixed mold (11) provided with the holder (40, 50). That is, a hollow portion that directly replaces the internal space of the holder (40, 50) is formed directly in the mold (10). This eliminates the need for the holder (40, 50) parts, reduces the number of parts, further simplifies the overall configuration of the molding die device (1), and reduces the cost. Become.

  According to the undercut processing mechanism according to the present invention, two undercut portions are separately provided in the molded product, and even when the relief directions of the undercut portions are different from each other, it is possible to easily perform die cutting. In addition, the entire mechanism can be configured in a compact manner, meeting the demand for space saving, easy to process and incorporate into the mold, and simple in configuration, requiring time and labor for assembly. Therefore, cost reduction can be realized.

It is a longitudinal cross-sectional view explaining the operation | movement at the time of shaping | molding of the shaping die apparatus which concerns on embodiment of this invention, and an undercut process mechanism. It is a longitudinal cross-sectional view explaining the operation | movement in the 1st step at the time of the die cutting of the shaping die apparatus which concerns on embodiment of this invention, and an undercut process mechanism. It is a longitudinal cross-sectional view explaining the operation | movement in the 2nd step at the time of the die cutting of the shaping die apparatus which concerns on embodiment of this invention, and an undercut process mechanism. It is a perspective view which shows the state in which each shaping | molding core exists in a shaping | molding position in the upper part of the movable mold | type which concerns on embodiment of this invention. It is a perspective view which shows the state which has the 1st shaping | molding core in a die cutting position, and the 2nd shaping | molding core is still in a mold release position in the upper part of the movable mold | type which concerns on embodiment of this invention. It is a perspective view which shows the state which has each shaping | molding core in a die cutting position in the upper part of the movable mold | type which concerns on embodiment of this invention. It is a perspective view which shows the relative positional relationship at the time of shaping | molding of each holder and each shaping | molding core which concerns on embodiment of this invention. It is a perspective view which shows the relative positional relationship in the 1st step at the time of the die cutting of each holder and each shaping | molding core which concerns on embodiment of this invention. It is a perspective view which shows the relative positional relationship in the 2nd step at the time of the die cutting of each holder and each shaping | molding core which concerns on embodiment of this invention. It is the disassembled perspective view which shows what divided the 1st holder which concerns on embodiment of this invention into 2 length, a 1st support member, and a 1st shaping | molding core. It is the perspective view which shows the relative positional relationship at the time of shape | molding what divided the 1st holder which concerns on embodiment of this invention into 2 length, and a 1st support member and a 1st shaping | molding core. It is the perspective view which shows the relative positional relationship at the time of die-cutting of what divided | segmented the 1st holder which concerns on embodiment of this invention into 2 length, and a 1st supporting member and a 1st shaping | molding core. It is a disassembled perspective view which shows what divided the 2nd holder which concerns on embodiment of this invention into 2 length, a holding | maintenance piece part, a connection member, and a 2nd shaping | molding core. It is the perspective view which shows the relative positional relationship at the time of shaping | molding of the holding | maintenance piece part, a connection member, and the 2nd shaping | molding core what vertically divided the 2nd holder which concerns on embodiment of this invention. It is a perspective view which shows the relative positional relationship at the time of die-cutting of what divided the 2nd holder which concerns on embodiment of this invention into 2 length, a holding | maintenance piece part, a connection member, and a 2nd shaping | molding core.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment that represents the present invention will be described based on the drawings.
1 to 3 are longitudinal sectional views for explaining operations of the molding die device 1 according to the present embodiment, the die 10 constituting the molding die device, and the undercut processing mechanism. 1 and 2, (a) shows a cross section parallel to the front of the apparatus, and (b) shows a cross section parallel to a side surface perpendicular to the front of the apparatus.

  The molding die apparatus 1 is an apparatus that molds a molded product P having an undercut portion P1 with a mold 10. As shown in FIG. 1, the molded product P according to the present embodiment has a shape such that a tray with side walls hanging from the periphery of a substantially horizontal upper surface is inverted, and is in front of FIG. A tongue-like undercut portion P1 protrudes inwardly from the lower end of the side wall portion, and a bottom-like undercut portion P2 protrudes inwardly from the lower end of the right side wall portion in FIG.

  As described above, the molded product P has the two undercut portions P1 and P2 at different locations, and the undercut portions P1 and P2 have different escape directions. That is, one undercut portion P1 is in the direction of escaping horizontally from the front side to the back side of the paper surface in FIG. 1A, whereas the other undercut portion P2 is shown in FIG. Inside, it is the direction of escaping from the right side to the left side of the page. The material of the molded product P includes not only a synthetic resin such as plastic but also a metal such as iron.

  As shown in FIG. 1, the mold 10 includes a fixed mold 11 that molds the outer surface side of the molded product P and a movable mold 12 that molds the inner surface side of the molded product P. A separate core 12a that matches the inside of the molded product P is integrally fixed on the upper surface side of the movable mold 12, and a bottom plate that closes an opening of a space into which holders 40 and 50 described later are inserted on the lower surface side. 12b is fixed integrally.

  The undercut processing mechanism provided in the molding die apparatus 1 is provided integrally with the plurality of undercut molding cores 60 and 70 corresponding to the two undercut portions P1 and P2 and the fixed mold 11 or the movable mold 12, respectively. And has holders 40 and 50 for assembling the respective undercut molding cores 60 and 70.

  In addition, although there are two undercut portions P1 and P2 in the present embodiment, each undercut portion P1 and P2 is divided into a plurality of groups as a group of undercut portions that can be punched in the same escape direction. A group of undercut portions may be collectively regarded as one or the other undercut portions P1 and P2.

  Below the movable mold 12, a base table 13 that can be pulled out in the direction opposite to the mold drawing direction (upward) (downward) with respect to the movable mold 12 is disposed. Here, the movable mold 12 is fixed at a fixed position when the molded product P is molded or unmolded. The base 13 is made of a plate material, and below the first push-up member 14 that keeps the movable mold 12 at a fixed position in the mold drawing direction, and after the base table 13 is pulled out, the base table 13 from below the pulling position. A second push-up member 15 that protrudes toward the die in the die-cutting direction is provided. Further, a first support member 20 is erected integrally on the base table 13.

  The 1st support member 20 is the shape which cut | disconnected the upper half part of the flat prismatic member diagonally, The base end part is being fixed to the base stand 13 via the knock pin 20a. The first support member 20 extends into a first holder 40, which will be described later, disposed on the movable mold 12, and in the first holder 40 in the reverse direction (downward direction) in the first holder 40 as the base 13 is pulled out. It is inserted so as to move relative to (direction). On the obliquely inclined end face of the upper half of the first support member 20, a ridge 21 is provided to which a first molded core 60 described later is movably connected.

  An ejector pin 16 is erected on the first push-up member 14. The ejector pin 16 is formed of a round bar member, and a base end portion thereof is fixed to the first push-up member 14 via a knock pin 16a. The ejector pin 16 extends upward through a vertical hole formed in each of the second push-up member 15 and the base base 13, and a tip portion is integrally fixed to the bottom plate 12 b of the movable mold 12. The first push-up member 14 is fixed at a fixed position in the mold drawing direction, and a driving mechanism (not shown) for pulling it out is connected to the base table 13.

  The second push-up member 15 is made of a plate material that, after the base table 13 is pulled out, protrudes further from the protruding position in the mold drawing direction. The second push-up member 15 is disposed below the base table 13 so as to overlap the first push-up member 14. The second push-up member 15 is provided with a second support member 30 that protrudes in the mold release direction along with the movement of the second push-up member 15. The 2nd support member 30 consists of a round bar member, and the base end part is being fixed to the 2nd push-up member 15 via the knock pin 30a.

  The second support member 30 extends upward through a vertical hole formed in the base table 13 and extends into a second holder 50 (described later) disposed on the movable mold 12. The second support member 30 is inserted into the second holder 50 so as to move in the mold release direction as the second push-up member 15 projects. A holding piece portion 31 that slides in the mold release direction within the second holder 50 is integrally provided at the distal end portion of the second support member 30.

  In addition, a connecting member 80 described later is movably connected to the holding piece 31. Note that a protruding rod (not shown) for projecting the second lifting member 15 is also connected to the second lifting member 15, or a protruding unit (not shown) is provided between the second lifting member 15 and the first lifting member 14. Is provided.

  As shown in FIG. 1, the holders 40 and 50 are for assembling a plurality of undercut forming cores 60 and 70, and are formed separately for each of the forming cores 60 and 70 described below. That is, the first holder 40 for assembling the first molded core 60 and the second holder 50 for assembling the second molded core 70 are provided.

  Each of the holders 40 and 50 is formed in a box shape whose upper and lower end surfaces are open, and is provided in a state of being integrally stored in the movable mold 12. The first support member 20 is inserted into the first holder 40 so as to be relatively movable in the mold release direction and the opposite direction. A holding piece 31 at the tip of the second support member 30 is inserted into the second holder 50 so as to be movable in the mold release direction and in the opposite direction.

  The first molded core 60 is provided corresponding to one undercut portion P1, and the second molded core 70 is provided corresponding to the other undercut portion P2. Here, the first molded core 60 is pushed and pulled in accordance with the relative movement of the first support member 20 in the first holder 40 in the direction opposite to the die-cutting direction, and one undercut portion is formed in the first holder 40. It is connected to the first support member 20 so as to interlock with the escape direction from P1.

  As shown in FIGS. 10-12, the 1st shaping | molding core 60 is formed in the shape shown in figure, and the ditch | groove 61 matched with the undercut part P1 is provided in the upper one end side. The first molded core 60 has a downwardly inclined surface 62 facing the inclined end surface of the first support member 20. A dovetail groove 63 is provided along the inclined surface 62, and the first molding core 60 is a first support member when the protrusion 21 of the first support member 20 is slidably fitted into the dovetail groove 63. It is connected to 20 so that it can be pushed and pulled.

  On the inner wall of the first holder 40, the first molded core 60, which is pushed and pulled in conjunction with the movement of the first support member 20 in the direction opposite to the die-cutting direction, escapes from the undercut portion P1. A first guide for guiding in the direction is provided. The first guide is provided as a first transverse groove 41 having a groove-shaped cross section that guides the first molded core 60 in the first holder 40 in the flank direction that is the right side in the horizontal direction. The first lateral grooves 41 are provided so that a pair faces the front and rear inner walls of the first holder 40.

  On the other hand, first intermediate strips 64 slidably fitted in first lateral grooves 41 in the first holder 40 are projected from intermediate portions of the front and rear outer walls of the first molded core 60. Here, the first horizontal strip 64 may be provided on either the outer wall of the first molded core 60 or the inner wall of the first holder 40, and the first horizontal groove 41 is provided on either one of them. In short, any configuration may be adopted in which the first molded core 60 is guided so as to be movable in the escape direction from the undercut portion P1 in conjunction with the relative movement of the second support member 30 during the die-cutting operation.

  As shown in FIGS. 13-15, the 2nd shaping | molding core 70 is formed in the shape shown in figure, The upper one end side becomes a shape which matched the said undercut part P2 entirely. A connecting member 80 that directly supports the second molded core 70 is integrally connected to the lower end side of the second molded core 70. The second molded core 70 is supported by the connecting member 80 so as to come out of the second holder 50.

  The connecting member 80 is a slightly flat rectangular bar-like member that extends obliquely downward from the second molded core 70, and slides in the escape direction with respect to the holding piece 31 at the tip of the second support member 30. The proximal end is movably connected. At the base end portion of the connecting member 80, a relief operation piece portion 81 that is slidably connected to the holding piece portion 31 in the relief direction is provided.

  At the upper end of the holding piece 31, a ridge 32 is provided so as to extend in a relief direction perpendicular to the axial direction (vertical direction in the drawing) of the second support member 30. On the other hand, a dovetail groove 82 which is slidably fitted in the escape direction with respect to the ridge 32 is recessed at the lower end of the escape operation piece portion 81. The holding piece 31 and the escaping piece 81 are connected to each other so as to be able to push and pull. Further, the connecting member 80 is supported in a state extending in an inclined direction that obliquely intersects the axial direction (vertical direction in the drawing) of the second support member 30.

  A second guide is provided on the inner wall of the second holder 50 to guide the connecting member 80 in an inclined direction in which the escape direction is combined with the mold release direction as the second support member 30 moves in the mold release direction. ing. The second guide is provided as a second oblique groove 51 having a recessed groove cross-sectional shape for guiding the connecting member 80 together with the second molded core 70 in the inclined direction. The second oblique grooves 51 are provided so that a pair of the second oblique grooves 51 face the front and rear inner walls of the second holder 50.

  On the other hand, on the front and rear outer walls of the connecting member 80, second ridges 83 that are slidably fitted in the second oblique grooves 51 of the second holder 50 are provided so as to extend over the entire length. ing. Here, the second oblique line 83 may be provided on either the outer wall of the connecting member 80 or the inner wall of the second holder 50, and the second oblique groove 51 is provided on either one of them. In short, the second molded core 70 may be configured to be guided so as to be movable in the tilting direction in conjunction with the protruding operation of the second support member 30 during the mold release operation together with the connecting member 80.

  According to the undercut processing mechanism as described above, when the molded product P is die-cut, first, the first molding core 60 is moved in the escape direction away from the one undercut portion P1 by the drawing operation of the base 13 and continues. By the protruding operation of the second push-up member 15, the second molding core 70 is set to move in an inclination direction in which the die-cutting direction is combined with the escape direction that escapes from the other undercut portion P <b> 2.

Next, the operation of the present embodiment will be described.
FIG. 1 shows a state where a molded product P is molded by the molding die apparatus 1. At the time of such molding, as shown in FIG. 4, the first molding core 60 and the second molding core 70 are held at molding positions where the outer wall surfaces are continuous with the outer wall surface of the core 12 a of the movable mold 12. When the molded product P is die-cut, after the fixed die 11 is removed, as shown in FIG. 2, the base table 13 is first driven in the direction opposite to the die-drawing direction by the drawing operation.

  When the base 13 moves and moves downward from the movable mold 12 at the fixed position, the first holder 40 integral with the movable mold 12 and the first support member 20 fixed on the base 13 are relative to each other. The positional relationship changes. That is, the first support member 20 on the base table 13 is moved relative to the first holder 40 at a fixed position in the opposite direction (downward) of the mold release direction so as to come out from the first holder 40. To do.

  As the relative position of the first support member 20 changes within the first holder 40, the first molded core 60 is pushed and pulled by the first support member 20. At this time, the first horizontal stripe 64 of the first molded core 60 is movably fitted to the first horizontal groove 41 (first guide) of the first holder 40, and is pushed and pulled by the first support member 20. The movement of the first molded core 60 is restricted in the escape direction along the first lateral groove 41. Therefore, the first molding core 60 moves from the molding position shown in FIGS. 1 and 4 to the mold release position shown in FIGS. 2 and 5 along the escape direction from the undercut portion P1.

  Subsequently, as shown in FIG. 3, the second push-up member 15 is driven in the mold release direction with respect to the first push-up member 14 in a fixed position, and accordingly, the second push-up member 15 is erected on the second push-up member 15. The second support member 30 is moved in the die cutting direction. Then, in the 2nd holder 50, the holding piece part 31 connected with the front-end | tip part of the 2nd supporting member 30 also moves to a mold release direction together, and the connection member 80 connected on the holding piece part 31 is moved. Will push up.

  Here, the connecting member 80 moves along the second oblique groove 51 (second guide) on the inner wall of the second holder 50 in which the second oblique line 83 is fitted, and the relief direction is shifted in the mold release direction. Guided in the combined tilt direction. Therefore, the second molding core 70 that is integrally supported by the distal end portion of the connecting member 80 extends from the molding position shown in FIGS. 1 and 4 to the mold release position shown in FIGS. 3 and 6 along the inclined direction. Moving.

  Thus, when the molded product P is die-cut, first the first molded core 60 moves from the molding position in the escape direction, and then the second molded core 70 moves from the molding position in the inclined direction. That is, the first molding core 60 and the second molding core 70 are shifted from the molding position to the mold release position at two stages instead of simultaneously, and the movement directions are also different from each other. Thereby, even when the undercut portions P1 and P2 are separately provided in the molded product P and the escape directions of the undercut portions P1 and P2 are completely different, the undercut portions P1 and P2 can be easily removed without forcibly removing them.

  Here, the direction in which the respective molding cores 60 and 70 escape from the corresponding undercut portions P1 and P2 is not limited to the direction perpendicular to the die-cutting direction, and may be any direction that intersects the die-cutting direction. It ’s fine. Therefore, the undercut portions P1 and P2 having various shapes can be accommodated without being limited to the undercut portions P1 and P2 having a shape that extends in a direction perpendicular to the die cutting direction.

  Furthermore, the first molded core 60 and the second molded core 70 are not dispersed on the ejector base plate or the movable mold 12, but only on either the fixed mold 11 or the movable mold 12 via the holders 40 and 50, respectively. It can be centrally arranged. As a result, a compact configuration can be achieved, a space-saving request can be met, and processing and incorporation into a mold are facilitated. In addition, the overall structure can be simplified, and the manufacturing cost can be greatly reduced.

  In the molding die apparatus 1 described above, an example is shown in which the mold 10 is fixed at a fixed position in the mold drawing direction, and the base table 13 is pulled out from the mold 10 in the opposite direction of the mold drawing direction. . Even if the base 10 is fixed at a fixed position in the die cutting direction and the mold 10 is protruded in the die cutting direction with reference to the fixed position of the base 13, the present invention may be used. The same effect can be obtained.

That is, the invention in such a case is
A base 13 for supporting the movable mold 12 integrally provided with the holders 40 and 50 so as to be movable in the mold release direction;
A first push-up member 14 that pushes the movable mold 12 in the die-cutting direction on the base 13, and a second push-out operation in the die-drawing direction from the sticking position after the first push-up member 14 is pushed out. The push-up member 15 is provided so as to be movable in the die-cutting direction, and
The base 40 is integrally extended to the holders 40 and 50, and the holders 40 and 50 are moved in the direction opposite to the mold release direction as the movable mold 12 is moved by the protruding operation of the first push-up member 14. Provided with a first support member 20 that moves relative to each other and movably connects the first molded core 60;
A second support member 30 is connected to the second push-up member 15 so as to move in the mold release direction in the holders 40 and 50 in accordance with the projecting operation, and the second molding core 70 is movably connected via a connecting member 80. Provided,
The first molded core 60 is pushed and pulled with the relative movement of the first support member 20 in the holders 40 and 50 in the direction opposite to the die-cutting direction. Connected to the first support member 20 to be interlocked with
The second molded core 70 is integrally supported by the distal end portion of the connecting member 80 outside the holders 40 and 50, and the base end portion of the connecting member 80 is the second member inside the holders 40 and 50. It is connected to the tip of the support member 30 so as to be movable in the escape direction,
A first guide for guiding the first molded core 60 along the clearance direction is provided in the holders 40 and 50 along with the protrusion operation of the first push-up member 14, and the second push-up member 15 is protruded. It can be grasped as an undercut processing mechanism characterized in that a second guide for guiding the connecting member 80 along the tilt direction is provided along with the operation.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to the above-described embodiments, and the present invention can be changed or added without departing from the scope of the present invention. Included in the invention. For example, the shapes of the molded product P and the molding cores 60 and 70 are not limited to those specifically illustrated, but are design matters that can be determined as appropriate.

  In the embodiment, the holders 40 and 50 are provided integrally with the movable mold 12. However, the holders 40 and 50 may be provided integrally with the fixed mold 11 instead of the movable mold 12. Further, the holders 40 and 50 are not necessarily divided into two, and may be configured so that the inside is divided as one holder.

  Moreover, in the said embodiment, since it comprised so that the 2nd shaping | molding core 70 could be integrally provided in the front-end | tip part of the connection member 80, a structure becomes further simple and cost reduction is possible, but a 2nd shaping | molding core can be performed. If 70 is comprised so that attachment or detachment is possible separately as a separate body in the front-end | tip part of the connection member 80, it will be possible to replace | exchange later to various shaping | molding cores, and versatility will spread.

  Furthermore, in the said embodiment, although each holder 40 and 50 is comprised separately from the movable mold | type 12 (or fixed mold | type 11), it is assembled | attached integrally later, However, Each holder 40 and 50 itself is movable. You may comprise as the type | mold 12 (or fixed type | mold 11).

  That is, a hollow portion serving as a substitute for the internal space of each holder 40, 50 is directly formed in the mold 10, and each ejector pin 16 or the like is accommodated in the hollow portion so as to be movable between a molding position and a release position. It ’s fine. Thereby, the number of parts regarding a holder is reduced, the structure of the whole molding die apparatus 1 can be simplified further, and it becomes possible to reduce cost.

  Since it can be configured compactly and can meet the demand for space saving, it is excellent in processing and incorporation into small molds, especially when the molded product has separate undercut parts. be able to.

P ... Molded product P1 ... Undercut part P2 ... Undercut part 1 ... Molding die device 10 ... Mold 11 ... Fixed mold 12 ... Movable mold 12a ... Core 12b ... Bottom plate 13 ... Base stand 14 ... First push-up member 15 2nd lifting member 16 ... Ejector pin 20 ... 1st support member 21 ... Projection 30 ... 2nd support member 31 ... Holding piece part 32 ... Projection 40 ... 1st holder 41 ... 1st horizontal groove 50 ... 2nd holder 51 ... 2nd oblique groove 60 ... 1st shaping | molding core 64 ... 1st horizontal strip 70 ... 2nd shaping | molding core 80 ... Connecting member 81 ... Escape action piece part 82 ... Dovetail groove 83 ... 2nd oblique line

Claims (6)

In a molding die apparatus that molds a molded product with a fixed mold and a movable mold, in the undercut processing mechanism that enables each separate undercut part in the molded product to be removed when the molded product is die-cut,
A plurality of undercut molding cores respectively corresponding to the separate undercut portions, and provided integrally with only one of the fixed mold or the movable mold and in a position not touching the molded product, A holder for assembling the undercut molding core,
When molding the molded product, the plurality of undercut molding cores each have an outer wall surface that matches the inside of the molded product above the holder and is in a molding position corresponding to one of the separate undercut portions. Comprising a first molded core to be held and a second molded core held at a molding position corresponding to the other;
At the time of die-cutting of the molded product, the first molded core moves in the escape direction away from one of the plurality of undercut portions, and the second molded core moves after the first molded core moves in the escape direction. The undercut processing mechanism is assembled to each of the holders so as to move in an inclination direction in which a die-cutting direction is combined with an escape direction that escapes from the other of the undercut portions. With respect to the movable mold provided integrally with the holder, it has a base that can be pulled out in the direction opposite to the mold drawing direction,
A first push-up member that keeps the movable mold at a fixed position in the mold drawing direction below the base table and, after the base table is pulled out, projects from the lower position of the base table toward the base table in the mold drawing direction. A second push-up member that operates is provided, and
Extends integrally to the base stand and into the holder, and moves relative to the direction opposite to the mold drawing direction in accordance with the drawing operation of the base stand, so that the first molding core is movably connected. Providing a first support member
The second push-up member is provided with a second support member that moves in the holder in the die-cutting direction in accordance with the projecting operation, and movably couples the second molding core via a coupling member,
The first molded core is pushed and pulled with relative movement of the first support member in the holder in the direction opposite to the die-cutting direction, and the first molded core is interlocked with the escape direction in the holder. Connected to the support member,
The second molded core is integrally supported by the distal end portion of the coupling member outside the holder, and the proximal end portion of the coupling member is in the holder with respect to the distal end portion of the second support member. It is connected so that it can move in the escape direction,
A first guide for guiding the first molded core along the clearance direction is provided in the holder in accordance with the drawing operation of the base table, and the connecting member is provided in accordance with the protruding operation of the second push-up member. The undercut processing mechanism according to claim 1, further comprising a second guide for guiding along the tilt direction. The holder is formed separately for each molded core, and includes a first holder for assembling the first molded core and a second holder for assembling the second molded core,
The undercut processing mechanism according to claim 2, wherein the first guide is provided on the first holder, and the second guide is provided on the second holder. A first lateral groove extending in the clearance direction in which the first molded core is guided in the first holder is provided on one of the inner wall of the first holder and the outer wall of the first molded core, and
In either one of them, a first horizontal strip that extends in the escape direction and is slidably fitted in the first horizontal groove is provided,
4. The undercut processing mechanism according to claim 3, wherein the first horizontal groove or the first horizontal strip on the inner wall of the first holder is the first guide. 5. A second oblique groove extending in the inclined direction in which the connecting member is guided in the second holder is provided on either the inner wall of the second holder or the outer wall of the connecting member;
In either one of them, a second oblique line that extends in the inclined direction and fits slidably into the second oblique groove is provided,
5. The undercut processing mechanism according to claim 3, wherein the second guide groove is the second oblique groove or the second oblique line on the inner wall of the second holder.   The undercut processing mechanism according to claim 1, 2, 3, 4, or 5, wherein the holder itself is configured as a part of the movable type or the fixed type provided with the holder.

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