JP2007181955A - Mold device for injection molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a mold device for injection molding which can move each core for an undercut forward/backward to a corresponding undercut position in good reproducibility while securing a movement space for the core even when a plurality of cavities are arranged on an approximately equal circumference to approach each other. <P>SOLUTION: A movable mold 3 is fitted with two kinds of the cores for the undercut (a rotary core 8 and a slide core 9), a ring gear 10, and a slide rack 11. By a tilting pin on the side of a fixed mold, by the slide rack 11 sliding in a guide channel 33 in linkage with the opening/closing motion of a mold, the ring gear 10 is rotated. By the rotation of the ring gear 10, the rotary core 8 and the slide core 9 are advanced/retracted to the undercut positions 7 of the corresponding cavities 4A and 4B, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an injection mold apparatus having an undercut processing mechanism, and more particularly to an injection mold apparatus in which a plurality of cavities are arranged on substantially the same circumference.

  Conventionally, as an injection mold device equipped with an undercut processing mechanism, an undercut slide core is interlocked with the opening and closing movement of the mold by using a cam mechanism such as an inclined pin (angular pin) or a dog leg cam. The structure of making it slide linearly is known (refer the following patent documents 1 and 2).

  Also known is a configuration in which a plurality of cores forming each wing part are slid radially using a cam mechanism in order to form a plurality of wing parts arranged radially (see the following patent document). 3 and 4).

JP-A-8-66943 JP 2003-1683 A Japanese Patent Laid-Open No. 5-124019 JP-A-8-112644

  Each of the above-described patent documents relates to a so-called single-piece injection molding technique, but a so-called multi-piece mold capable of injection-molding a plurality of resin products at a time. The apparatus is also used for molding various resin products used in various fields.

  For example, there is known a mold apparatus capable of molding 16 to 32 resin optical elements such as lenses and diffraction gratings at a time. In this type of mold apparatus, it is often the case that each runner of equal length is radially arranged from the sprue position, and a cavity is arranged at the tip of each runner. In this case, a plurality of cavities are connected to the sprue. It will be arrange | positioned on the substantially same circumference centering on a position.

  Further, some resin optical elements are required to be provided with a groove, a wall, a recessed portion or the like (hereinafter referred to as “groove or the like”) used for positioning or the like. Many of such grooves and the like are formed in directions different from the opening and closing directions of the fixed type and the movable type (usually coincident with the optical axis direction of the optical element). It needs to be processed as a cut.

  However, in the case of a mold apparatus in which a plurality of cavities are arranged on substantially the same circumference, each cavity is arranged close to each other as the number of cavities increases, so that each undercut is shaped. There is a problem that it is difficult to secure a moving space for a plurality of undercut cores. In addition, since it is necessary to move each undercut core so as to avoid other adjacent cavities, it is difficult to advance and retract each undercut core to each corresponding undercut position with good reproducibility. is there.

  The present invention has been made in view of such circumstances, and even when a plurality of cavities are arranged close to each other on substantially the same circumference, while ensuring the movement space of each undercut core, It is an object of the present invention to provide an injection mold apparatus that can advance and retract each undercut core to a corresponding undercut position with good reproducibility.

The mold apparatus for injection molding according to the present invention has two molds consisting of a fixed mold and a movable mold, and the axis is in the plane perpendicular to the axis extending in the opening and closing direction of these two molds. An injection mold apparatus in which a plurality of cavities for molding a product having an undercut are disposed on substantially the same circumference,
An undercut core for shaping the undercut;
The ring-shaped or disk-shaped shape centering on the axis is incorporated into one of the fixed mold and the movable mold so as to be rotatable around the axis, and the plurality of undercuts A rotating member mechanically coupled to the core,
A plurality of the undercut cores are arranged on substantially the same circumference so as to correspond to each of the plurality of cavities, and the undercuts of the corresponding cavities are interlocked with the rotational movement of the rotating member. It is comprised so that it may advance / retreat to a position, It is characterized by the above-mentioned.

  In the mold apparatus for injection molding according to the present invention, the undercut core is a slide core that linearly advances and retreats to the undercut position of the corresponding cavity in conjunction with the rotational movement of the rotating member, or In conjunction with the rotational movement of the rotating member, the rotating core can be moved back and forth while rotating to the undercut position of the corresponding cavity.

  The undercut core may be composed of at least two types of the slide core and the rotating core, and the slide core and the rotating core may be alternately arranged.

  Further, the slide core is supported in a guide groove formed in the one mold so as to be linearly movable, and is connected to the rotating member via a first cam mechanism. The core may be rotatably supported in a recess formed in the one mold, and may be connected to the rotating member via a second cam mechanism.

  Further, in the injection mold apparatus of the present invention, the rotating member is formed with a tooth row arranged on a circumference centering on the axis, and the rotating member is rotated by acting on the tooth row. It can be set as the structure by which the drive mechanism to drive is provided.

  In this case, the drive mechanism includes an inclined pin extending obliquely with respect to the axis line from the other mold in which the rotating member is not incorporated among the fixed mold and the movable mold to the one mold, and the tilt An inclined pin hole that engages with the pin, and a rack that meshes with the tooth row of the rotary member, and a slide rack that is incorporated in the one mold so as to be linearly movable along the plane. The sliding rack is moved in conjunction with the opening and closing movements of the fixed type and the movable type by engagement of the inclined pin and the inclined pin hole, and is interlocked with the movement of the sliding rack by meshing the tooth row and the rack. The rotating member can be rotated.

  On the other hand, the drive mechanism includes a rotation transmission mechanism having a gear that meshes with the tooth row of the rotation member, and applies a rotational force output from a predetermined drive source to the rotation member via the rotation transmission mechanism. It may be configured to transmit and rotate the rotating member.

  The “undercut position” means a position where an undercut of a product is shaped (formed) in each cavity.

  According to the injection molding die apparatus of the present invention, a plurality of undercut cores for shaping the undercut are arranged on substantially the same circumference so as to correspond to each of the plurality of cavities. Thus, even when the plurality of cavities are arranged close to each other on the substantially same circumference, it is possible to secure a moving space for each undercut core.

  In particular, it has at least two types of undercut cores, a slide core that linearly advances and retracts to a corresponding undercut position, and a rotary core that advances and retreats while rotating to a corresponding undercut position. According to the present invention, even when a plurality of cavities are arranged in close proximity to each other on substantially the same circumference, it is possible to secure a movement space for each undercut core.

  In addition, the rotary member is rotatably incorporated in one of the fixed mold and the movable mold, and a plurality of undercut cores are mechanically connected to the rotary member, so that the rotary member can be rotated. Since each undercut core is configured to move in conjunction with each other, each undercut core can be moved back and forth to the corresponding undercut position with good reproducibility.

  As a result, for example, undercut processing in a resinous optical element such as a diffraction grating, which requires high optical performance, can be stably performed with high accuracy. Therefore, a resinous optical element that requires undercut processing can be efficiently used. It becomes possible to injection-mold well in large quantities.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view of an injection molding die apparatus according to the first embodiment of the present invention, in which FIG. 1 (a) shows a state at the time of mold clamping, and FIG. 1 (b) shows a state at the time of mold opening. Show. FIG. 2 is a partial front view of the movable mold when the mold is opened. In FIG. 1, only the upper part in the figure from the central axis X of the injection molding die apparatus is shown.

  An injection mold apparatus (hereinafter referred to as a “first mold apparatus”) 1 shown in FIG. 1 is for taking a large number of resin optical elements such as lenses and diffraction gratings having an undercut. There are a fixed mold 2 and a movable mold 3 that open and close each other along the direction of the central axis X. A sprue serving as a receiving port for a molten resin injected from an injection molding machine (not shown) is formed on the central axis X of the fixed mold 2, but the illustration is omitted.

  As shown in FIG. 2, two types of cavities 4A and 4B are alternately and substantially equally spaced on the same circumference centered on the central axis X as shown in FIG. The space between the two cavities 4A and 4B adjacent to each other is very limited (only two are shown in FIG. 2). A plurality of runners 5 extending radially from the central axis X toward the cavities 4 are arranged on the dividing plane PL, and gates 6 are respectively provided between the tip portions of the runners 5 and the cavities 4. Is formed.

  The two types of cavities 4A and 4B shown in FIG. 2 are for molding the same type of resin optical element, but undercut positions 7 are set to be different from each other. That is, in the cavity 4A shown on the left side in the figure, on the dividing plane PL, there are a straight line connecting the center of the cavity 4A and the center axis X, and a straight line connecting the center of the cavity 4A and the center of the undercut position 7. The undercut position 7 is set so that the angle formed is a relatively large angle (for example, 45 degrees or more and less than 180 degrees). On the other hand, in the cavity 4B shown on the right side in the figure, on the dividing plane PL, there are a straight line connecting the center of the cavity 4B and the central axis X, and a straight line connecting the center of the cavity 4B and the center of the undercut position 7. The undercut position 7 is set so that the angle formed is a relatively small angle (for example, 0 degrees or more and less than 45 degrees).

  As shown in FIG. 2, the movable die 3 is provided with two types of undercut cores (the turning core 8 and the slide core 9). The rotating core 8 is provided corresponding to the cavity 4A, and can be rotated around the support pin 8a in the support pin 8a fixed to the movable mold 3 and the recess 31 formed in the movable mold 3. In addition, a substantially semicircular base portion 8b, an undercut forming (forming) convex portion 8c provided at one end portion of the base portion 8b, and a cam pin 8d provided on the back surface side of the base portion 8b are provided. Further, as shown in the drawing, the base portion 8b has a shape in which a part of the peripheral edge portion is cut out, and a taper portion for finally closing the rotating core 8 is formed in the cutout portion. 8e (the other side taper portion is provided on the fixed mold 2. Not shown) is provided.

  On the other hand, the slide core 9 is provided corresponding to the cavity 4B, and is provided at a base portion 9a that can be moved linearly along the guide groove 32 formed in the movable mold 3, and at a distal end portion of the base portion 9a. In addition, a convex portion 9b for undercut shaping and a cam pin 9c provided on the back side of the base portion 9a are provided. Further, as shown in the drawing, a taper portion 9d (a mating taper portion 21 is provided in the fixed mold 2) for finally closing the slide core 9 at the rear end portion of the base portion 9a. 1 (b)).

  As shown in part in FIG. 2, the rotating core 8 and the slide core 9 have substantially the same circumference so as to correspond to the two types of cavities 4A and 4B arranged in close proximity to each other. In FIG. 2, a plurality of them are alternately arranged.

  The movable die 3 is provided with a holding member for holding the rotating core 8 and the slide core 9 on the movable die 3 side, but the illustration of the holding member is omitted.

  As shown in FIGS. 1 and 2, the movable die 3 incorporates an annular ring gear 10 as a rotating member mechanically connected to the undercut cores 8 and 9. As shown in FIG. 2, the ring gear 10 includes a tooth row 10a formed on a part of the outer peripheral edge thereof, a cam groove 10b constituting a first cam mechanism together with a cam pin 8d of the rotating core 8, and a slide. The cam groove 10c which comprises a 2nd cam mechanism with the cam pin 9c of the core 9 is provided, and it is comprised so that it can rotate centering | focusing on the center axis line X. FIG.

  Further, as shown in FIGS. 1 and 2, the movable mold 3 incorporates a slide rack 11 including a rack 11 a that meshes with the tooth row 10 a of the ring gear 10. The slide rack 11 constitutes a drive mechanism of the ring gear 10 together with the inclined pin 22 (see FIG. 1) provided in the fixed mold 2, and includes an inclined pin hole 11b that engages with the inclined pin 22, and is fixed. In conjunction with opening and closing of the mold 2 and the movable mold 3, it is configured to move in the left-right direction in FIG. 2 (in a direction perpendicular to the paper surface in FIG. 1). As shown in FIGS. 1 and 2, the movable mold 3 is formed with a guide hole 33 in which the slide rack 11 is movably accommodated and a long hole 34 through which the inclined pin hole 11b is inserted.

  Hereafter, the effect | action which concerns on the undercut process of the 1st metal mold | die apparatus 1 is demonstrated using FIG. 3 and FIG. FIG. 3 is a diagram showing stepwise the movement of the rotating core 8 according to the undercut process (FIG. 3A is a stage at the time of mold clamping, and FIG. 3B is a state where the rotating core 8 starts to move. Stage, (c) is the stage when the mold is opened), the upper stage shows the open / close state of the fixed mold 2 and the movable mold 3 corresponding to each stage, and the lower stage shows the slide rack 11 and the ring gear 10 corresponding to each stage. , And the moving state of the rotating core 8 are shown. FIG. 4 is a diagram showing stepwise the movement of the slide core 9 related to the undercut process (FIG. 4A is a stage at the time of mold clamping, and FIG. 4B is an intermediate between mold clamping and mold opening. (C) is the stage when the mold is opened), the upper stage shows the open / close state of the fixed mold 2 and the movable mold 3 corresponding to each stage, and the lower stage shows the slide rack 11 corresponding to each stage of this open / close state. The movement states of the ring gear 10 and the slide core 9 are shown respectively. 3 and 4, the slide rack 11 is indicated by a solid line for easy understanding of the movement of the slide rack 11.

First, the movement related to the undercut process of the rotating core 8 will be described.
In the state at the time of mold clamping shown in FIG. 3A, the slide rack 11 is a view of the guide hole 33 of the movable die 3 due to the engagement between the inclined pin 22 of the fixed die 2 and the inclined pin hole 11 b of the slide rack 11. The ring gear 10 is located on the leftmost side in the middle, and the ring gear 10 is located on the most counterclockwise side in the drawing within the rotation range due to the meshing of the rack 11a of the slide rack 11 and the tooth row 10a of the ring gear 10. Further, due to the engagement between the cam groove 10b of the ring gear 10 and the cam pin 8d of the rotating core 8, the rotating core 8 is located on the most counterclockwise side in the drawing within the rotation range. The convex portion 8c enters to the back of the undercut position 7 of the cavity 4A. The final closing of the rotary core 8 is performed by a taper portion (not shown) provided on the fixed mold 2 being in sliding contact with the taper portion 8e of the rotary core 8.

  When the mold opening is started, the slide rack 11 is slid rightward in the drawing along the guide hole 33 by the inclined pin 22, and the ring gear 10 is rotated clockwise in the drawing by the movement of the slide rack 11. It is done. The cam groove 10b is formed along a circumference centered on the central axis X (see FIG. 2), and the rotating core 8 is configured such that the cam pin 8d is connected to the cam groove 10b as shown in FIG. 3B. It does not move until it touches the left end in the figure.

  FIG. 3B shows a state immediately after the cam pin 8d is pressed by the left end of the cam groove 10b and the rotating core 8 starts to rotate clockwise in the figure. The part 8c starts to leave from the undercut position 7 of the cavity 4A.

In the state at the time of mold opening shown in FIG. 3C, the slide rack 11 is slid to the right end of the guide hole 33 in the drawing by the inclined pin 22, and the ring gear 10 is moved by the movement of the slide rack 11. It can be rotated to the most clockwise side in the figure within the rotation range. Further, the rotating core 8 is rotated to the most clockwise direction in the drawing within the rotation range, and at this time, the convex portion 8c of the rotating core 8 is completely detached from the undercut position 7 of the cavity 4A.
In addition, the movement of each member at the time of mold clamping is a movement in the opposite direction to that described above.

Next, a movement related to the undercut process of the slide core 9 will be described.
The state of the inclined pin 22, the slide rack 11, and the ring gear 10 at the time of mold clamping shown in FIG. 4A is the same as the state shown in FIG. In this state, due to the engagement between the cam groove 10c of the ring gear 10 and the cam pin 9c of the slide core 9, the slide core 9 is closest to the lower side in the drawing (center axis X shown in FIG. 2) within the slide range. At this time, the convex portion 9b of the slide core 9 enters to the back of the undercut position 7 of the cavity 4B. The final closing of the slide core 9 is performed by the taper portion 21 (see FIG. 1B) provided in the fixed mold 2 being in sliding contact with the taper portion 9d of the slide core 9.

  When the mold opening is started, the slide rack 11 is slid rightward in the drawing along the guide hole 33 by the inclined pin 22, and the ring gear 10 is rotated clockwise in the drawing by the movement of the slide rack 11. It is done. The cam groove 10c is formed obliquely with respect to the circumference centered on the central axis X (see FIG. 2), and the slide core 9 is moved upward in the drawing immediately after the ring gear 10 is moved to slide. The convex portion 9b of the core 9 starts to be detached from the undercut position 7 of the cavity 4B. That is, the slide core 9 starts to start before the rotating core 8 rotates, and the rotating core 8 immediately before the protruding portion 9b of the slide core 9 completes the separation from the undercut position 7 of the cavity 4B. , Is starting to rotate.

In the state when the mold is opened as shown in FIG. 4C, the slide rack 11 is slid to the right end of the guide hole 33 in the drawing by the inclined pin 22, and the ring gear 10 is moved by the movement of the slide rack 11. It can be rotated to the most clockwise side in the figure within the rotation range. Further, the slide core 9 is moved to the uppermost side (the side farthest from the central axis X shown in FIG. 2) within the slide range, and at this time, the convex portion 9b of the slide core 9 is the undercut position 7 of the cavity 4B. Completely leave.
In addition, the movement of each member at the time of mold clamping is a movement in the opposite direction to that described above.

  Next, another embodiment of the present invention will be described. FIG. 5 is a partial longitudinal sectional view of an injection mold apparatus according to the second embodiment of the present invention. In FIG. 5, only the upper part in the figure from the central axis X of the injection mold apparatus is shown. Moreover, the number etc. which were used in FIGS. 1-4 are diverted and attached | subjected to the component which is conceptually common with the component of the 1st metal mold | die apparatus 1 mentioned above.

  An injection mold apparatus (hereinafter referred to as “second mold apparatus”) 1A shown in FIG. 5 includes two types of cavities 4A and 4B and two types of undercut cores (rotating core 8 and slide core 9). (Only the cavity 4B and the slide core 9 are shown in FIG. 5), the configuration and operation thereof, the arrangement of the plurality of runners 5 and the gates 6 and the like. Same as 1. Although the ring gear 10 has the same configuration, in the first mold apparatus 1, the drive mechanism for the ring gear 10, which is configured by the inclined pins 22 and the slide rack 11, is the second mold apparatus. Then, the point comprised by the rotation transmission mechanism 40 differs.

  As shown in FIG. 5, the rotation transmission mechanism 40 includes a gear box 41 that transmits the rotation of the rotary drive shaft 12 a of the electric motor 12 as a drive source to the shaft 42, and four gears 43, 44, 47, and 49. ing. The gear 49 is incorporated in the movable mold 3 so as to mesh with the tooth row 10 a of the ring gear 10, and is coaxially connected to the gear 47 incorporated in the movable mold 3 via a shaft 48. Further, the gear 44 is accommodated via a shaft 45 in a housing 46 provided at the upper part of the movable mold 3 in the figure so as to mesh with both the gear 43 and the gear 47.

  The rotation transmission mechanism 40 transmits the rotational force output from the electric motor 12 to the ring gear 10 via a gear train (not shown) in the gear box 41 and the four gears 43, 44, 47, 49, and The ring gear 10 is rotated. The structure in which the core for undercut advances and retreats to the undercut position 7 (see FIG. 2) by the rotation of the ring gear 10 is the same as that of the first mold apparatus 1. In addition, by controlling the driving of the electric motor 12, the movement timing of the undercut core can be linked to the opening and closing movements of the fixed mold 2 and the movable mold 3 as in the case of the first mold apparatus 1. Although it is possible, it can also be performed separately from the opening and closing movement of the mold. For example, when the mold is clamped, the undercut core is positioned in advance at the undercut position 7 prior to the movement of the mold, and when the mold is opened, the undercut core is moved after the movement of the mold is completed. Can be separated from the undercut position 7.

  According to the first and second mold apparatuses 1 and 1A described above, two types of undercutting cores, that is, the rotating core 8 and the slide core 9, are arranged very close to each other on substantially the same circumference. The undercut processing of the resinous optical element molded in the cavities 4A and 4B can be stably performed with high accuracy.

  In addition, although the said embodiment demonstrated taking the form of what is called a horizontal clamp | tightening horizontal injection as an example, it is also possible to employ | adopt other mold-clamping forms, such as vertical-clamping injection, and mold | die attachment forms.

  Moreover, in the said embodiment, although the core for undercuts is comprised by two types, the rotation core 8 and the slide core 9, and these are arrange | positioned alternately, the structure of the core for undercuts is limited to this. It is not a thing. For example, it is possible to configure an undercut core only by the rotating core 8 or only the slide core 9 or to include three or more types of undercut cores in addition to the other configurations. is there. In addition, when a plurality of types of undercutting cores are provided, the manner of disposing each type of undercutting core is not limited to the manner of disposing each type alternately, and various embodiments can be employed.

  Moreover, although the said embodiment demonstrated and demonstrated the injection molding of the resinous optical element as an example, this invention is applicable to the injection molding of various resin products.

Longitudinal sectional view of the first mold apparatus Partial front view of movable mold at the time of mold opening of first mold apparatus The figure which shows the motion of the rotation core of a 1st metal mold apparatus in steps. The figure which shows the motion of the slide core of a 1st metal mold apparatus in steps. Partial longitudinal sectional view of the second mold apparatus

Explanation of symbols

1 Molding device for injection molding (first mold device)
1A Molding device for injection molding (second mold device)
2 fixed mold 3 movable mold 4A, 4B cavity 5 runner 6 gate 7 undercut position 8 rotating core 8a support pin 8b base 8c convex 8d cam pin 8e taper 9 slide core 9a base 9b convex 9c cam pin 9d taper 10 ring Gear 10a Tooth row 10b Cam groove 11 Slide rack 11a Rack 11b Inclined pin hole 12 Electric motor (drive source)
12a Rotation drive shaft 21 Tapered portion 22 Inclined pin 31 Recessed portion 32 Guide groove 33 Guide hole 34 Long hole 40 Rotation transmission mechanism 41 Gear box 42, 45, 48 Shaft 43, 44, 47, 49 Gear 46 Housing X Center axis PL Split surface

Claims (9)

An undercut is formed on substantially the same circumference centering on the axis in a plane orthogonal to the axis extending in the opening and closing direction of the two molds. It is an injection mold apparatus in which a plurality of cavities for molding each product is arranged,
An undercut core for shaping the undercut;
The ring-shaped or disk-shaped shape centering on the axis is incorporated into one of the fixed mold and the movable mold so as to be rotatable around the axis, and the plurality of undercuts A rotating member mechanically coupled to the core,
A plurality of the undercut cores are arranged on substantially the same circumference so as to correspond to each of the plurality of cavities, and the undercuts of the corresponding cavities are interlocked with the rotational movement of the rotating member. Configured to advance and retract to position,
An injection mold apparatus characterized by the above. The undercut core is a slide core that linearly advances and retreats to the undercut position of the corresponding cavity in conjunction with the rotational movement of the rotating member.
2. The mold apparatus for injection molding according to claim 1. The undercut core is a rotating core that advances and retreats while rotating to the undercut position of the corresponding cavity in conjunction with the rotational movement of the rotating member.
2. The mold apparatus for injection molding according to claim 1. The undercut core corresponds to the slide core that linearly advances and retreats to the undercut position of the corresponding cavity in conjunction with the rotational motion of the rotating member, and the corresponding to the rotational motion of the rotational member. It consists of at least two types of rotating cores that move forward and backward while rotating to the undercut position of the cavity.
2. The mold apparatus for injection molding according to claim 1.   The injection mold apparatus according to claim 4, wherein the slide core and the rotating core are alternately arranged. The slide core is supported in a guide groove formed in the one mold so as to be linearly movable, and is connected to the rotating member via a first cam mechanism,
The rotating core is rotatably supported in a recess formed in the one mold, and is connected to the rotating member via a second cam mechanism.
6. A mold apparatus for injection molding according to claim 4 or 5. The rotating member is formed with tooth rows arranged on a circumference centered on the axis,
A drive mechanism is provided that acts on the dentition to rotate the rotating member.
The mold apparatus for injection molding according to any one of claims 1 to 6. The drive mechanism is
Among the fixed mold and the movable mold, an inclined pin extending obliquely with respect to the axis from the other mold in which the rotating member is not incorporated toward the one mold,
An inclined pin hole that engages with the inclined pin, and a rack that meshes with the tooth row of the rotating member, and a slide rack that is incorporated in the one mold so as to be linearly movable along the plane. With
The slide rack is moved in conjunction with the opening and closing movements of the fixed mold and the movable mold by the engagement of the tilt pin and the tilt pin hole, and the slide rack is moved by meshing the tooth row and the rack. It is configured to rotate the rotating member in conjunction with
The mold apparatus for injection molding according to claim 7. The drive mechanism is
A rotation transmission mechanism having a gear meshing with the tooth row of the rotating member;
A rotational force output from a predetermined drive source is transmitted to the rotating member via the rotation transmission mechanism, and is configured to rotate the rotating member.
The mold apparatus for injection molding according to claim 7.

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