JP5131779B2 - Mold equipment - Google Patents

Description

  The present invention relates to a mold apparatus that molds a molded product having a boss with a fixed mold and a movable mold, and projects the boss when the molded product is punched.

  In general, in a mold apparatus that forms a molded product using a fixed mold and a movable mold, it is an important issue to ensure that the molded product is released without damaging the molded product. There are various methods. For example, in the case of a molded product having a boss, a sleeve knock type in which the edge of the boss is protruded by a ring-shaped sleeve is known.

  In addition, if the molded product is released from the mold by only one ejection operation, the molded product may be damaged or deformed. Then, a two-stage extrusion mold is known in which a boss portion of a molded product whose mold release resistance has been relaxed by the next second ejection operation is projected from the mold.

  Specifically, for example, a molding die described in Patent Document 1 is known. In other words, two protrusion plates are provided. At first, the two protrusion plates are protruded at the same time, the sleeve and the core pin move together, and when the protrusion rod moves, one protrusion plate cannot be moved by the stopper. Only the other protruding plate is protruded until it comes into contact with the fixed mold, and the molded product is finally extruded only by the sleeve.

JP 2003-39505 A

  In the conventional two-stage ejection mold as described above, two ejection plates are required to realize a two-stage ejection operation, and these are configured to move simultaneously or be separated from each other. Therefore, there are problems that the number of parts is large and the overall configuration is complicated, and it takes time and labor to assemble, resulting in a cost increase. Further, there is a problem that a large installation space is required compared to the amount of movement of the two plates, and it is difficult to meet the demand for space saving.

  The present invention has been made by paying attention to the problems of the conventional techniques as described above, has a small number of parts, has a simple configuration, does not require time and effort for assembly, and can realize cost reduction. An object of the present invention is to provide a mold apparatus that can be configured compactly and can meet the demand for space saving.

The gist of the present invention for achieving the object described above resides in the inventions of the following items.
[1] A molded product (P) having a boss (P1) is formed by the fixed mold (12) and the movable mold (13), and the boss (P1) is protruded when the molded product (P) is removed from the mold. In the mold apparatus (10) for extracting,
A movable mounting plate (14) is disposed below the movable mold (13),
An ejector base plate which is disposed between the movable mold (13) and the movable mounting plate (14) and is a push-up member (15) which is driven in a die-cutting direction which is a vertical direction and protrudes; A core pin (20) that forms the inner surface of the boss (P1), and a sleeve (30) that projects the boss (P1),
Before SL sleeve (30) is erected on the ejector bedplate (15) on through the holder (40) having an inner space extending in the vertical direction,
Said core pin (20) is slidably and rotatably penetrates the sleeve (30) within, is supported on a slider which its lower end is movably accommodated in the die cutting direction at the holder (40) in (50), Movement in the mold release direction with respect to the sleeve (30) is restricted in the middle,
The slider (50) is supported via a connecting member (60) so as to be movable within a predetermined range in the vertical direction with respect to the movable mounting plate (14).
With the ejecting operation of the ejector base plate, the core pin (20) and the sleeve (30) are simultaneously moved in the die-cutting direction at the initial stage of the ejection, and the core pin (20) whose movement is restricted from the middle of the ejection is controlled. On the other hand, only the sleeve (30) moves in the die-cutting direction.

[ 2 ] The slider (50) is formed in a cylindrical shape having an opening at the bottom, and a bar (51) is provided in the vicinity of the opening so as to cross the inside.
The connecting member (60) is formed in a rod shape to be inserted into the slider (50), and a guide groove (61) is provided through which the bar (51) is relatively movable vertically. The mold apparatus (10) as described in [ 1 ] characterized by these.

[ 3 ] The slider (50) is urged upward by a spring (70) wound around the connecting member (60) in the internal space of the holder (40) [ 2 ] The mold apparatus (10) described in 1.

The present invention operates as follows.
According to the mold apparatus (10) described in [1], only the ejector base plate, which is one push-up member (15) , is driven in the die-cutting direction and protrudes, as in the prior art. There are no two protruding plates, and the core pin (20) and the sleeve (30) pass through the sleeve (30) so that the core pin (20) is slidable, and the core pin (20) mold with respect to the sleeve (30). It is erected on the ejector base plate in a state where the movement in the pulling direction is regulated in the middle.

With the ejecting operation of the ejector base plate, the core pin (20) and the sleeve (30) are simultaneously moved in the mold release direction at the initial stage of the ejection, and the sleeve is moved against the core pin (20) whose movement is restricted from the middle of the ejection. Only (30) moves in the die-cutting direction. Thereby, after the main part of the molded product (P) is die-cut in the first step by driving one ejector base plate , the portion of the boss (P1) of the molded product (P) is removed in the subsequent steps. Finally it is ejected by the sleeve (30).

As described above, since the two-stage protrusion can be performed only by driving one ejector base plate , the number of parts is small, the configuration is simple, and the assembly does not take time and effort, and the cost can be reduced. Further, it can be configured in a compact manner, can meet the demand for space saving, and can be applied particularly to a small molded product (P).

Specifically, arranged movable mounting plate (14) below the movable mold (13), which is between the movable die (13) movable mounting plate (14), said push-up member (15) ejector The base plate is disposed so as to be driven in the die-cutting direction which is the vertical direction. The sleeve (30) is erected on the ejector base plate via a holder (40) having an internal space extending in the vertical direction, and the lower end of the core pin (20) is the holder (40). It is supported by a slider (50) accommodated so as to be movable in the mold release direction.

  Here, regarding the restriction of the movement of the core pin (20), the slider (50) is supported via the connecting member (60) so as to be movable within a predetermined range in the vertical direction with respect to the movable mounting plate (14). It ’s fine. With such a simple configuration, the core pin (20) moves in synchronism with the sleeve (30) within a range in which the slider (50) is movable in the holder (40), and the slider (50) is connected to the coupling (50). Only the sleeve (30) moves from the time when the movement is restricted by the member (60).

More specifically, as described in [ 2 ] above, for example, the slider (50) is formed in a cylindrical shape that opens downward, and a bar (51) that crosses the inside is provided near the opening. Then, the connecting member (60) is formed in a rod shape to be inserted into the slider (50), and a guide groove (61) through which the bar (51) is relatively movable in the vertical direction is provided. good. With such a simple configuration, the moving range of the slider (50) can be set to the length of the guide groove (61).

Further, as described in [ 3 ], the slider (50) may be urged upward by a spring (70) wound around the connecting member (60) in the internal space of the holder (40). As a result, as the holder (40) moves in the die-cutting direction, the internal slider (50) can also be moved in the die-cutting direction in synchronism with the urging force of the spring (70). it can.

  According to the mold apparatus according to the present invention, it is possible to project two steps by only driving one push-up member, so the number of parts is small, the configuration is simple, and the assembly does not take time and effort, and the cost is reduced. can do. Further, it can be configured in a compact manner, can meet the demand for space saving, and can be applied particularly to a small molded product.

It is a longitudinal cross-sectional view which shows the state at the time of shaping | molding of the metal mold | die apparatus which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the state at the time of shaping | molding which looked at the metal mold apparatus which concerns on embodiment of this invention from the direction orthogonal to FIG. It is a longitudinal cross-sectional view which shows the state in the middle of die cutting which looked at the metal mold apparatus which concerns on embodiment of this invention from the same direction as FIG. It is a longitudinal cross-sectional view which shows the state at the time of completion | finish of die-cutting which looked at the metal mold apparatus which concerns on embodiment of this invention from the same direction as FIG. It is explanatory drawing which shows the form change in the die cutting process of the combination of the core pin and sleeve which is the principal part of the metal mold | die apparatus which concerns on embodiment of this invention. It is a perspective view which fractures | ruptures and shows each component of the metal mold | die apparatus which concerns on embodiment of this invention longitudinally. It is a perspective view which shows each component of the metal mold | die apparatus which concerns on embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment that represents the present invention will be described based on the drawings.
1 to 4 are longitudinal sectional views for explaining the operation of the mold apparatus 10 according to the present embodiment. FIG. 1 is a longitudinal sectional view showing a state at the time of molding, and FIG. 2 is a longitudinal sectional view showing a state at the time of molding viewed from a direction orthogonal to FIG. 3 is a longitudinal cross-sectional view showing a state in the middle of die cutting from the same direction as FIG. 2, and FIG. 4 is a vertical cross-sectional view showing a state at the end of die cutting from the same direction as FIG.

  A mold apparatus 10 according to the present embodiment is an apparatus that molds a molded product P having a boss P <b> 1 with a mold 11. As shown in FIG. 1, the molded product P here is a plate-like member as a whole, and has a boss P1 on the inner surface side thereof. The boss P1 has a tubular structure protruding in the die cutting direction. The material of the molded product P is not limited to a synthetic resin such as plastic but may be a metal such as iron or copper.

  As shown in FIGS. 1 and 2, the mold 11 of the mold apparatus 10 includes a fixed mold 12 that molds the outer surface side of the molded product P and a movable mold 13 that molds the inner surface side of the molded product P including the boss P1. It consists of. A movable mounting plate 14 is installed below the movable mold 13, and an ejector base plate 15 made of a double-layered plate material can be driven in the vertical direction between the movable mold 13 and the movable mounting plate 14. It is arranged. The ejector base plate 15 corresponds to one push-up member that is driven in the die-cutting direction to perform a protruding operation.

  In addition to the ejector base plate 15, the mold apparatus 10 includes a core pin 20 that forms the inner surface of the boss P1 of the molded product P, and a sleeve 30 that projects the boss P1. The core pin 20 and the sleeve 30 are formed on the ejector base plate 15 in a state where the core pin 20 slidably penetrates into the sleeve 30 and the movement of the core pin 20 in the mold release direction is restricted in the middle of the sleeve 30. Is erected.

  The sleeve 30 is erected on the ejector base plate 15 via a holder 40 having an internal space extending in the vertical direction. The lower end of the core pin 20 is supported by a slider 50 that is housed in the holder 40 so as to be movable in the mold release direction. As shown in FIG. 6, the core pin 20 is a solid rod-like member, and an upper end portion 21 of the core pin 20 forms a portion forming the inner surface of the boss P <b> 1, and a flange 22 a is provided on the outer periphery of the lower end portion 22.

  The lower end portion 22 of the core pin 20 is integrally screwed to the upper end surface of the slider 50 in a state where the lower end portion 22 is inserted through the upper lid member 23 surrounding the flange 22a. The slider 50 is formed in a cylindrical shape having an opening at the bottom, and a bar 51 is installed in the vicinity of the opening so as to cross the inside. The slider 50 is movably accommodated in a holder 40 described later. The slider 50 is supported via a connecting member 60 so as to be movable within a predetermined range in the vertical direction with respect to the movable mounting plate 14.

  The connecting member 60 is formed in a rod shape to be inserted into the slider 50, and a guide groove 61 through which the bar 51 is relatively movable in the vertical direction is formed from the middle portion to the upper end portion. A lower end 62 of the connecting member 60 is fixed to the movable mounting plate 14 via a knock pin 63. As a result, the slider 50 moves in the vertical direction together with the holder 40 described below within a range in which the bar 51 relatively moves in the guide groove 61 of the connecting member 60.

  As shown in FIG. 6, the sleeve 30 is a tubular member through which the core pin 20 is inserted. The upper end portion 31 of the sleeve 30 protrudes from the boss P <b> 1, and a flange 32 a is provided on the outer periphery of the lower end portion 32. It has been. The lower end portion 32 of the sleeve 30 is integrally screwed to the upper end surface of the holder 40 while being inserted through the upper lid member 33 surrounding the flange 32a.

  The holder 40 is formed in a cylindrical shape that opens downward, and a through hole 41 through which the upper end portion 21 of the core pin 20 is inserted is formed in the upper end surface of the holder 40. The lower half of the holder 40 is buried between the two stacked plate members of the ejector base plate 15, and the lower end side of the holder 40 opens to the lower surface side of the ejector base plate 15. Further, a lower cover member 42 is provided in the vicinity of the opening on the lower end side of the holder 40 so that the connecting member 60 is inserted without rotating around the axis and the slider 50 is prevented from falling out of the holder 40. It is attached.

  Further, the slider 50 is urged upward in the internal space of the holder 40 by a spring 70 wound around the connecting member 60. The spring 70 is interposed between the lower end surface of the slider 50 and the lower lid member 42, and the upper slider 50 is in the die releasing direction in synchronization with the movement of the holder 40 in the die releasing direction. Is energized.

Next, the operation of the present embodiment will be described.
As shown in FIGS. 1 and 2, at the time of molding, the cavity between the fixed mold 12 and the movable mold 13 is filled with a molten resin, and a molded product P having a boss P <b> 1 is molded. At this time, the ejector base plate 15 is in contact with the movable mounting plate 14, the core pin 20 and the sleeve 30 are held at predetermined molding positions, and the inner surface of the boss P <b> 1 is formed by the upper end portion 21 of the core pin 20.

  As shown in FIG. 3, when the molding is finished and the fixed mold 12 is separated from the movable mold 13, the ejector base plate 15 is driven upward. Then, the sleeve 30 on the holder 40 erected directly on the ejector base plate 15 moves upward in the mold release direction. At this time, the slider 50 housed in the holder 40 is biased upward by the spring 70, and the slider 50 also moves in synchronization with the holder 40. Accordingly, the core pin 20 on the slider 50 also moves upward in synchronization with the sleeve 30.

  As described above, the core pin 20 and the sleeve 30 simultaneously move in the mold-release direction along with the ejecting operation of the ejector base plate 15, but the sleeve 30 with respect to the core pin 20 whose movement is restricted in the middle of the ejection. Only moves in the direction of die cutting. That is, as shown in FIG. 4, the slider 50 that supports the core pin 20 moves relative to the guide groove 61 of the connecting member 60 in which the bar 51 at the lower end is supported on the movable mounting plate 14. It is regulated within the range.

  Therefore, when the bar 51 comes into contact with the upper end in the guide groove 61, only the sleeve 30 moves in the mold release direction with respect to the core pin 20 whose movement is restricted thereafter. Thereby, after the main part of the molded product P is die-cut in the first process by driving one ejector base plate 15, the portion of the boss P1 of the molded product P is finally formed by the sleeve 30 in the subsequent process. Will be pushed out.

  As described above, since the two-stage protrusion can be performed only by driving one ejector base plate 15, the number of parts of the entire mold apparatus 10 is small, the configuration is simple, and the assembly does not take time and effort, and the cost can be reduced. Can be realized. Further, it can be configured in a compact manner, can meet the demand for space saving, and can be applied to a small molded product P in particular.

  In FIG. 4, when the molded product P is removed, the core pin 20 and the sleeve 30 supported on the ejector base plate 15 also return to the initial position at the time of molding as the ejector base plate 15 returns to the position at the time of molding. . Further, the fixed mold 12 also returns to the molding position, and the next molded product P is molded. In addition, what is necessary is just to design the specific length of the core pin 20 or the sleeve 30 according to the stroke which can be die-cut of the whole molded product P including the boss | hub P1.

  The embodiments of the present invention have been described above with reference to the drawings. However, 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 boss P1 are not limited to those specifically illustrated.

  Since the two-stage protrusion can be performed only by driving one push-up member, the number of parts is small, the configuration is simple, and the assembly does not take time and effort, and the cost can be reduced. Further, it can be configured in a compact manner, can meet the demand for space saving, and can be applied particularly to a small molded product.

P ... Molded product P1 ... Boss 10 ... Mold device 11 ... Mold 12 ... Fixed die 13 ... Movable die 14 ... Movable mounting plate 15 ... Ejector base plate 20 ... Core pin 21 ... Upper end 22 ... Lower end 22a ... Flange 23 ... Upper lid member 30 ... Sleeve 31 ... Upper end portion 32 ... Lower end portion 32a ... Flange 33 ... Upper lid member 40 ... Holder 41 ... Through hole 42 ... Lower lid member 50 ... Slider 51 ... Bar 60 ... Connecting member 61 ... Guide groove 62 ... Lower end portion 63 ... Knock pin 70 ... Spring

Claims (3)

In a mold apparatus that molds a molded product having a boss with a fixed mold and a movable mold, and projects the boss when the molded product is die-cut,
A movable mounting plate is disposed below the movable mold,
An ejector base plate that is disposed between the movable mold and the movable mounting plate and that is driven in a die-cutting direction that is an up-down direction and that protrudes and a core pin that forms the inner surface of the boss And a sleeve that projects the boss,
Before SL sleeve is erected on the ejector bedplate on through a holder with an inner space extending in the vertical direction,
The core pin is slidingly and rotatably penetrates into the sleeve, is supported on the slider its lower end is movably accommodated in the die cutting direction at the said holder, movement to the die-cut direction with respect to the sleeve Is regulated along the way,
The slider is supported via a connecting member so as to be movable within a predetermined range in the vertical direction with respect to the movable mounting plate,
With the ejecting operation of the ejector base plate, the core pin and the sleeve simultaneously move in the die-cutting direction at the beginning of the sticking, and only the sleeve is in the die-cutting direction with respect to the core pin whose movement is restricted in the middle of the sticking. A mold apparatus characterized by moving to The slider is formed in a cylindrical shape with an opening at the bottom, and a bar that crosses the inside is installed near the opening.
2. The mold according to claim 1 , wherein the connecting member is formed in a rod shape to be inserted into the slider, and provided with a guide groove through which the bar is relatively movable in the vertical direction. apparatus. The mold apparatus according to claim 2 , wherein the slider is biased upward by a spring wound around the connecting member in an internal space of the holder.

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