JP2005178102A - Mold for molding resin ferrule and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mold a resin ferrule having a microhole length of every kind in the same mold without replacing a core pin. <P>SOLUTION: In the mold for molding the resin ferrule (3) having a fiber insertion hole (6) at its base end part (4a) and having the microhole (7) extending from the fiber insertion hole at its leading end part (4b) and a manufacturing method of the mold, the mold (1) is equipped with a core pin (31) composed of a column part (32) for molding the fiber insertion hole and the pin part (33) extending from the column part to mold the microhole, a fitting hole (23) in which the column part of the core pin is fitted in an axially movable manner, a pin housing hole (12) for housing the leading end of the pin part of the core pin and a core pin moving means (41) for axially moving the core pin within a cavity. The core pin is moved by the core pin moving means to mold the resin ferrule so as to set the microhole length (L) thereof to a predetermined length. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a molding die for a resin ferrule for an optical fiber connector and a method for manufacturing the same.

  Ferrules for optical fiber connectors were expensive precision parts manufactured with high technology using metals, ceramics, polycrystalline glass, etc., but in recent years, resin ferrules have been developed to reduce manufacturing costs. Various improvements have been made so far. This resin ferrule is manufactured by, for example, an injection molding method using a molding die using a thermoplastic resin such as liquid crystal polymer (LCP) as a material.

  For example, as shown in FIG. 6, a conventional resin ferrule molding die 81 is composed of a fixed die 82 and a movable die 83, and a cavity 84 that matches the outer shape of the ferrule 95 is formed in these die. It is formed. The resin filled in the cavity 84 is supplied from the fixed mold 82 side, and a spru 85 that is a through hole for resin injection is formed in the fixed mold 82. The sprue 85 is formed in a conical space whose diameter is gradually expanded toward the movable mold 83. Further, a cold slug well 86 is formed at a portion of the movable mold 83 that faces the sprue 85. Then, the resin is filled into the cavity 84 through the ring-shaped runner 88 opened in the parting surface 87, and the ferrule 95 is formed.

  The cavity 84 includes a portion for forming the capillary 96 which is a main body portion of the ferrule 95 and a portion for forming a flange 97 protruding radially outward from the outer peripheral portion of the capillary 96, and a core pin 89 is formed in the cavity 84. Inserted. The core pin 89 includes a cylindrical portion 90 that forms a fiber insertion hole 98 inside the capillary 96, and a pin portion 91 that extends from the tip of the cylindrical portion 90 and forms a microhole 99 at the tip of the capillary (for example, (See Patent Document 1 and Patent Document 2).

The fine hole 99 at the tip of the capillary is for fixing the optical fiber through the optical fiber connector when assembling, and the length varies depending on the specification. For example, 2 mm It is formed to 3 mm, 6 mm, etc.
JP 2001-133658 A (Page 5, FIG. 3) Japanese Patent No. 3346753 (pages 3-6 and 3-4)

  As described above, in the conventional resin ferrule molding die and its manufacturing method, the core pin 89 is disposed in the cavity 84 of the molding die 81, and the fiber insertion hole 98 is formed inside the capillary 96 by the cylindrical portion 90. At the same time, the pin portion 91 forms a micro hole 99 at the tip of the capillary. The fine hole 99 at the tip of the capillary is used for passing the optical fiber therethrough and fixing it to the ferrule 95 when assembling the optical fiber connector, and its length varies depending on the specification. It is formed to 2 mm, 3 mm, 6 mm and the like.

  In order to mold ferrules having different micropore lengths in this way, the same mold cannot be used, and a mold according to the microhole length of the ferrule is manufactured, or It is necessary to remove the core pin from the mold and replace it with another core pin corresponding to the length of the fine hole. Therefore, it is necessary to manufacture a new mold for the former, and in both cases, it is necessary to detach the mold, which causes a decrease in productivity due to a prolonged process and a large increase in manufacturing cost. There is a problem.

  The present invention has been made to solve such problems. Ferrules having various fine hole lengths can be molded in the same molding die without changing the core pin, thereby producing It is an object of the present invention to provide a molding die for a resin ferrule and a method for manufacturing the same that can improve the performance and can greatly reduce the manufacturing cost.

  In order to solve the above-mentioned problems, the means employed by the present invention has a fiber insertion hole through which the optical fiber is inserted at the base end portion and a micro hole extending from the fiber insertion hole to fix the optical fiber at the distal end portion. In a molding die of a resin ferrule in which a cavity for molding a resin ferrule is formed, a core pin including a cylindrical portion for molding a fiber insertion hole and a pin portion for forming a fine hole extending from the cylindrical portion, and a core pin A fitting hole for movably fitting the cylindrical portion of the core pin, a pin accommodating hole for accommodating the tip of the pin portion of the core pin, and a fine hole length of the ferrule by moving the core pin in the axial direction within the cavity And a core pin moving means for forming the wire into a predetermined length.

  Thus, since the molding die for the resin ferrule of the present invention includes the core pin moving means for moving the core pin in the axial direction within the cavity, the fine hole length of the ferrule can be formed to a predetermined length. Therefore, ferrules having various fine hole lengths can be continuously formed using the same molding die without replacing the core pins.

  The core pin moving means preferably includes an ejector rod mechanism for projecting the ferrule from the mold, and a connecting portion for connecting the ejector rod mechanism and the core pin. Thus, since the core pin is moved using the existing ejector rod mechanism, it is versatile and advantageous in terms of cost. In addition, this existing ejector rod mechanism can move the core pin in units of 0.1 mm, and can provide a movement accuracy sufficiently corresponding to the manufacturing accuracy of the fine hole length. Even when the existing ejector rod mechanism has only a protruding function, the core pin is pressed toward the ejector rod mechanism by the pressure of the resin filled in the cavity. Securely fixed.

  It is desirable that the connecting portion includes a return mechanism for returning the core pin to the ejector rod mechanism side. Generally, an existing ejector rod mechanism has only a protruding function. Therefore, by providing the return mechanism, the ejector rod, the connecting portion and the like can be returned to their original positions after the mold is opened.

  The return mechanism is preferably formed by a spring that urges the connecting portion toward the ejector rod mechanism. By forming the return mechanism with such a spring, even when the ejector rod mechanism has only a protruding function, the ejector rod, the connecting portion, etc. can be returned to their original positions after opening the mold, and the core pin can be It can always be pressed against the ejector rod mechanism side, and the moving accuracy of the core pin can be further increased.

  The core pin moving means may be a micro gauge moving mechanism that moves the core pin in the axial direction by a manual micro gauge. By using a manual microgauge moving mechanism, the core pin moving means can be easily manufactured with high moving accuracy.

  The core pin moving means may be composed of a control motor moving mechanism that is driven by a control motor to move the core pin in the axial direction. By using a control motor moving mechanism comprising a stepping motor or the like, the core pin can be moved in units of 0.1 mm, and a moving accuracy sufficiently corresponding to the manufacturing accuracy of the fine hole length can be provided. Moreover, it can respond to the automation of injection molding.

  Further, in order to solve the above-mentioned problems, the means employed by the present invention has a fiber insertion hole through which the optical fiber is inserted at the base end portion and a micro hole extending from the fiber insertion hole and fixing the optical fiber at the distal end. In a method for manufacturing a resin ferrule for forming a resin ferrule in a portion, a core pin including a cylindrical portion that forms a fiber insertion hole and a pin portion that extends from the cylindrical portion and forms a fine hole, and the cylindrical portion of the core pin in the axial direction Using a molding die including a fitting hole that is movably fitted to the pin, a pin accommodation hole that accommodates the tip of the pin portion of the core pin, and a core pin moving means that moves the core pin in the axial direction within the cavity, The core pin is moved by the core pin moving means to form the fine hole length of the ferrule to a predetermined length.

  Thus, in the resin ferrule manufacturing method of the present invention, the resin ferrule molding die includes core pin moving means for moving the core pin in the axial direction in the cavity to mold the fine hole length of the ferrule to a predetermined length. Thus, ferrules having various fine hole lengths can be continuously formed using the same mold without replacing the core pins.

  The molding die for a resin ferrule of the present invention molds a resin ferrule having a fiber insertion hole through which an optical fiber is inserted at the base end portion and a fine hole extending from the fiber insertion hole to fix the optical fiber at the distal end portion. In a molding die of a resin ferrule in which a cavity for forming is formed, a core pin comprising a cylindrical portion for forming a fiber insertion hole and a pin portion extending from the cylindrical portion to form a fine hole, and the cylindrical portion of the core pin in the axial direction A pin hole for receiving the tip of the pin portion of the core pin, and moving the core pin in the axial direction in the cavity to form the fine hole length of the ferrule to a predetermined length. Core pin moving means.

  The method for producing a resin ferrule according to the present invention is a method of molding a resin ferrule having a fiber insertion hole through which an optical fiber is inserted at the base end portion and a micro hole extending from the fiber insertion hole to fix the optical fiber at the tip end portion. In the method of manufacturing a resin ferrule, a core pin formed of a cylindrical portion that forms a fiber insertion hole and a pin portion that extends from the cylindrical portion and forms a fine hole is fitted to the cylindrical portion of the core pin so as to be movable in the axial direction. The core pin is moved by the core pin moving means using a molding die having a fitting hole, a pin receiving hole for receiving the tip of the pin portion of the core pin, and a core pin moving means for moving the core pin in the axial direction in the cavity. Then, the fine hole length of the ferrule is formed to a predetermined length.

  Therefore, ferrules having various fine hole lengths can be continuously formed in the same molding die without replacing the core pin, thereby improving productivity and reducing manufacturing costs. There is an excellent effect that it can be greatly reduced.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the invention of a molding die for a resin ferrule of the present invention and a method for manufacturing the same will be described in detail with reference to FIGS.

  1 is a front sectional view showing a molding die of the resin ferrule of the present invention, FIG. 2 is a front sectional view showing another operation state of the molding die of FIG. 1, and FIG. 3 is a protrusion of the ferrule of FIG. FIG. 4 is a front sectional view showing a molding die of another resin ferrule, and FIG. 5 is a front sectional view showing another molding die of a resin ferrule.

  As shown in FIG. 1, the molding die 1 includes, for example, a fixed mold 10 and a movable mold 20, and the fixed mold 10 and the movable mold 20 form a cavity 8 serving as a molding space for the ferrule 3 that is a product. It is formed. The ferrule 3 has a fiber insertion hole 6 through which an optical fiber is inserted in the proximal end portion 4a of the capillary 4, and a minute hole 7 extending from the fiber insertion hole 6 and fixing the optical fiber in the distal end portion 4b.

  The resin 2 filled in the cavity 8 in a molten state is supplied from the fixed mold 10 side, for example. A runner 21 that guides the molten resin 2 from the fixed mold 10 side and transfers it to the cavity 8 opens on the parting surface 25 of the movable mold 20, and melts into the cavity 8 through a gate 22 that extends from the runner 21. Resin 2 is filled and ferrule 3 is molded. As the runner, a known method such as a semi-hot runner method or a cold liner method can be used, and as the gate, a known method such as a ring gate, a side gate, a pin gate, or a submarine gate can be used.

  As the resin 2, since the resin ferrule for optical fiber contact is a precision component, it is desirable to use a super engineering thermoplastic resin such as liquid crystal polymer (LCP). As the super engineering thermoplastic resin, in addition to liquid crystal polymer (LCP), for example, polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polytetrafluoroethylene (PTFE), polyetherimide (PEI), polyarylate (PAR), polysulfone (PSF), polyethersulfone (PES), polyamideimide (PAI) and the like.

  As described above, the movable mold 20 that contacts the parting surface 11 of the fixed mold 10 cooperates with the fixed mold 10 to form a cavity 8 that becomes a molding space of the ferrule 3. And a flange forming portion 8b for forming the flange 5 projecting radially outward from the outer peripheral portion of the capillary 4. A core pin 31 is inserted into the capillary 4. The core pin 31 includes a cylindrical portion 32 that forms the fiber insertion hole 6 of the ferrule 3 described above, and a pin portion 33 that extends from the cylindrical portion 32 and forms the fine hole 7. The core pin 31 functions as a core.

  The cylindrical portion 32 and the pin portion 33 of the core pin 31 are formed longer than a general ferrule forming core pin that is used while being fixed to a mold. The movable die 20 is provided with a fitting hole 23 in which the cylindrical portion 32 of the core pin 31 can be fitted so as to be movable in the axial direction. Further, the fixed mold 10 is provided with a pin accommodation hole 12 that can accommodate the tip end portion of the pin portion 33 of the core pin 31 in the axial movement range of the core pin 31. The pin accommodation hole 12 is formed according to the maximum projecting length of the pin portion 33 of the core pin 31.

  On the other hand, an ejector rod 41, which is an ejector rod mechanism, is disposed on the movable mold 20 side. The ejector rod 41 is a general-purpose one that is generally used in an injection molding machine, and its protruding length can be adjusted in units of 0.1 mm. In front of the ejector rod 41, an ejector plate 42 with a protruding portion 43 projecting forward and an ejector pin 44 fitted in the movable die 20 so as to be movable in the axial direction are disposed.

  A storage box (connecting portion) 46 is disposed below the ejector plate 42, and a transmission plate (connecting portion) 47 is disposed in front of the storage box 46. A pin rod (connecting portion) 48 is disposed in front of the transmission plate 47. The pin rod 48 is connected to the proximal end of the cylindrical portion 32 of the core pin 31. The pin rod 48 is provided with a return mechanism 49. The return mechanism 49 includes, for example, a piston 50 provided on the pin rod 48, a cylinder 51, and a spring 52 provided in the cylinder 51.

  The pin rod 48 and the cylindrical portion 32 of the core pin 31 connected to the pin rod 48 are always urged toward the ejector rod 41 by the spring 52. The return mechanism 49 is not limited to the above-described spring 52 or the like, and for example, an air cylinder, a hydraulic cylinder, a solenoid, or the like can be used. The transmission plate 47 includes a moving mechanism (not shown) such as an air cylinder, a hydraulic cylinder, and an electric motor, and can be inserted and removed vertically between the storage box 46 and the pin rod 48.

  As shown in FIGS. 1 and 2, the movement of the ejector rod 41 is transmitted to the core pin 31 via the ejector plate 42, the receiving box 46, the transmission plate 47, and the pin rod 48 to adjust the position of the core pin 31 in the cavity 8. can do. At this time, the tip of the pin portion 33 of the core pin 31 is accommodated in the pin accommodation hole 12. Thus, by adjusting the position of the core pin 31, the exposed length of the pin portion 33 of the core pin 31 in the cavity 8 is adjusted. Therefore, the fine hole length L of the ferrule 3 that is a product can be arbitrarily changed in units of 0.1 mm that is the protrusion accuracy of the ejector rod 41.

  Next, a method for manufacturing a resin ferrule using the molding die 1 described above will be described.

  The method for producing a resin ferrule according to the present invention is an injection in which a resin material is heated to a molten state, filled into the cavities 8 of the molds 10 and 20 assembled with the molten resin, and solidified in the mold 1. It depends on the molding method.

  As shown in FIG. 1, for example, the parting surface 25 of the movable mold 20 is assembled to the parting surface 11 of the fixed mold 10 on an XY table. The ejector rod 41 is moved to adjust the axial position of the core pin 31 in the cavity 8 so that the fine hole length L of the ferrule 3 is formed to a predetermined length. For example, in FIG. 1, the fine hole length L is set to 6 mm, and in FIG. 2, the fine hole length L is set to 2 mm. As shown in FIG. 1, at this time, the pin portion 33 of the core pin 31 is accommodated in the pin accommodation hole 12 of the cavity 8.

  Next, the molten resin 2 is injected into the runner 21 in the movable mold 20, and the molten resin 2 is filled into the cavity 8 through the runner 21 and the gate portion 22. Here, the existing ejector rod 41 generally has only a protruding function. Further, since the cylindrical portion 32 of the core pin 31 is fitted in the fitting hole 23 so as to be movable in the axial direction, the core pin 31 has passed through the cavity 8 beyond a predetermined position regardless of the position of the ejector rod 41. There is a risk of moving to.

  However, in this mold 1, the spring 52 of the return mechanism 49 always urges the pin rod 48 and the core pin 31 connected thereto to the ejector rod 41 side, so that the core pin 31 moves inside the cavity 8 at a predetermined position. There is no fear of moving to a position that has gone too far. Even if the core pin 31 moves to a position where it has gone too far, the core pin 31 is pressed toward the ejector rod mechanism 41 by the pressure of the resin 2 filled in the cavity 8. Is returned to a predetermined position and fixed securely. As described above, the ejector rod 41 can provide a movement accuracy sufficiently corresponding to the manufacturing accuracy of the fine hole length L.

  Then, the ferrule 3 is cooled and solidified in the mold 1, and after a predetermined time has elapsed, the mold is opened as shown in FIG. The mold opening is performed by moving the movable mold 20 backward. At that time, the transmission plate 47 interposed between the accommodation box 46 of the ejector plate 42 and the pin rod 48 is extracted downward by a moving mechanism (not shown). Thereby, since the front surface of the storage box 46 is opened, the proximal end portion of the pin rod 48 on which the biasing force of the spring 52 acts via the piston 50 is stored in the storage box 46. As described above, since the spring 52 as the return mechanism 49 is disposed on the pin rod 48, the pin rod 48 and the core pin 31 connected thereto move to the ejector rod 41 side after the mold opening, and the original position is reached. Return to.

  Finally, the projecting portion 43 of the ejector rod 41 is advanced, and the ferrule 3 as a product is ejected from the movable mold 20 together with the runner 21 from the ejector pin 44. The runner 21 is separated from the ferrule 3 by gate cutting, and the runner 21 is discarded.

  Thus, according to the molding die of the present resin ferrule and the manufacturing method thereof, without changing the core pin 31 in the same molding die 1, the ferrule 3 having an arbitrary fine hole length L can be continuously formed. Can be molded. That is, since it is not necessary to remove the molding die 1 and replace the core pin 31, the process can be shortened, the productivity can be improved, and the manufacturing cost can be greatly reduced. Or it is not necessary to manufacture the separate shaping | molding metal mold | die 1 corresponding to the fine hole length L of the ferrule 3, This can also reduce manufacturing cost significantly. Furthermore, since the core pin 31 is moved using the ejector rod 41 which is the existing equipment of the injection molding machine, it is rich in versatility and advantageous in terms of cost.

  As shown in FIG. 4, the molding die 60 has a micro gauge moving mechanism 61 that moves the core pin 65 in the axial direction by a manual micro gauge 62 as a core pin moving means. The micro gauge moving mechanism 61 includes a micro gauge 62 that can adjust the amount of movement in the axial direction in units of μm, and a gear mechanism 63 that converts the rotational driving force of the micro gauge 62 into the linear moving force of the advance / retreat rod 64. The proximal end of the core pin 65 is connected to the advance / retreat rod 64, and the core pin 65 can be moved in the axial direction within the cavity 66 with a very high accuracy and fixed at a predetermined position. By using such a microgauge moving mechanism 61, a core pin moving means can be easily manufactured with high moving accuracy. Others are the same as the molding die 1 described above.

  As shown in FIG. 5, the molding die 70 has a control motor moving mechanism 71 that is driven by a control motor 72 to move the core pin 78 in the axial direction as core pin moving means. As the control motor 72, for example, a stepping motor that can easily control the rotation angle can be used. The rotational driving force of the control motor 72 meshes with a driving pulley 73 attached to the motor shaft 72a, a belt 75 wound around the driving pulley 73 and the driven pulley 74, a ball screw 76 attached to the driven pulley 74, and a ball screw 76. This is transmitted as an axial movement force to the core pin 78 connected to the nut bracket 77 through the nut bracket 77.

  By using the control motor moving mechanism 71 composed of this stepping motor or the like, the core pin 78 can be moved in the axial direction with an accuracy of 0.1 mm as in the case of the ejector rod 41 described above. Moreover, according to this control motor moving mechanism 71, it can respond also to automation of injection molding. In the control motor moving mechanism 71 described above, the rotational driving force of the control motor 72 is transmitted to the ball screw 76 by a belt drive, but may be transmitted to the ball screw 76 by a direct drive, a gear mechanism, or the like. Further, instead of using the ball screw 76, a rack and pinion or the like may be used. Others are the same as the molding die 1 described above.

  In the above-described resin ferrule molding die and manufacturing method thereof, the description has been given as the molding die 1, 60, 70 for one piece, but the present invention is not limited to this. It can also be a type. Further, although the molding dies 1, 60, and 70 have been described as a single unit, in addition to the above-described core pin moving means 41, 61, and 71, an opening / closing mechanism, a mold clamping mechanism, and the like may be provided to constitute an injection molding machine. Further, the core pin moving means is not necessarily limited to the ejector rod mechanism 41 described above. Further, the return mechanism 49 is not necessarily provided in the ejector rod mechanism 41.

  The resin ferrule molding die of the present invention and the manufacturing method thereof are capable of molding ferrules of various fine hole lengths in the same molding die without replacing the core pin, thereby improving productivity. In addition to being able to achieve this, manufacturing costs can be significantly reduced. Therefore, the present invention is not limited to a molding die for an optical fiber ferrule and a method for manufacturing the same, and can be widely used as a molding die for all types of resin molded products having an axial inner hole and a method for manufacturing the same.

It is front sectional drawing which shows the shaping die of the resin ferrule of this invention. It is front sectional drawing which shows another operation state of the shaping die of FIG. It is front sectional drawing which shows the protrusion state of the ferrule of FIG. It is front sectional drawing which shows the shaping die of another resin ferrule. It is front sectional drawing which shows the shaping die of another resin ferrule. It is front sectional drawing which shows the shaping | molding die of the conventional resin ferrule.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold 2 Resin 3 Ferrule 4 Capillary 4a Base end part 4b Tip part 5 Flange 6 Fiber insertion hole 7 Fine hole 8 Cavity 8a Capillary molding part 8b Flange molding part 10 Fixed mold 11 Parting surface 12 Pin accommodation hole 20 Movable type 21 Runner 22 Gate 23 Fitting hole 25 Parting surface 31 Core pin 32 Cylindrical part 33 Pin part 41 Ejector rod 42 Ejector plate 43 Projection part 44 Ejector pin 46 Housing box 47 Transmission plate 48 Pin rod 49 Return mechanism 50 Piston 51 Cylinder 52 Spring 60 Molding die 61 Microgauge moving mechanism 62 Microgauge 63 Gear mechanism 64 Advancing and retracting rod 65 Core pin 66 Cavity 70 Molding die 71 Control motor moving mechanism 72 Control motor 72a Motor shaft 73 Driving pulley 74 Re75 Belt 76 Ball screw 77 Nut bracket 78 Core pin 81 Mold 82 Fixed mold 83 Movable mold 84 Cavity 85 Spru 86 Cold slug well 87 Parting surface 88 Runner 89 Core pin 90 Cylindrical part 91 Pin part 95 Ferrule 96 Capillary 97 Flange 98 Fiber Insertion hole 99 Micro hole L Micro hole length

Claims (7)

  Resin ferrule having a fiber insertion hole (6) for inserting an optical fiber in the base end (4a) and a micro hole (7) extending from the fiber insertion hole for fixing the optical fiber in the distal end (4b) In the molding die (1, 60, 70) of the resin ferrule in which the cavity (8, 66) for molding (3) is formed, from the cylindrical portion (32) for molding the fiber insertion hole and the cylindrical portion A core pin (31, 65, 78) comprising a pin portion (33) extending to form the fine hole, and a fitting hole (23) for fitting the cylindrical portion of the core pin so as to be movable in the axial direction. The pin receiving hole (12) for receiving the tip end portion of the pin portion of the core pin, and the core pin is moved in the axial direction in the cavity to form the fine hole length (L) of the ferrule to a predetermined length. To Pin moving means (41,61,71) and molding die of the resin ferrule, comprising the.   The core pin moving means includes an ejector rod mechanism (41) for projecting the ferrule (3) from the mold, and a connecting portion (46, 47, 48) for connecting the ejector rod mechanism and the core pin (31). The molding die for a resin ferrule according to claim 1, wherein:   3. The resin ferrule molding die according to claim 2, wherein the connecting portion includes a return mechanism (49) for returning the core pin (31) to the ejector rod mechanism (41).   The said return mechanism (49) is formed by the spring (52) which urges | biases the said connection part (46, 47, 48) to the said ejector rod mechanism (41) side. Mold for resin ferrule.   The resin ferrule molding die according to claim 1, wherein the core pin moving means comprises a micro gauge moving mechanism (61) for moving the core pin (65) in an axial direction by a manual micro gauge (62). .   2. The molding of a resin ferrule according to claim 1, wherein the core pin moving means includes a control motor moving mechanism (71) driven by a control motor (72) to move the core pin (78) in the axial direction. Mold.   Resin ferrule having a fiber insertion hole (6) for inserting an optical fiber in the base end (4a) and a micro hole (7) extending from the fiber insertion hole for fixing the optical fiber in the distal end (4b) (3) In the manufacturing method of the resin ferrule which shape | molds, the core pin (31) which consists of the cylindrical part (32) which shape | molds the said fiber insertion hole, and the pin part (33) which extends from the said cylindrical part and shape | molds the said fine hole. , 65, 78), a fitting hole (23) for fitting the cylindrical portion of the core pin so as to be movable in the axial direction, and a pin receiving hole (12) for receiving the tip portion of the pin portion of the core pin , Using a molding die (1, 60, 70) provided with core pin moving means (41, 61, 71) for moving the core pin in the axial direction in the cavity, and the core is moved by the core pin moving means. Method for producing a resin ferrule, characterized in that shaping the micropores length of the ferrule by moving the down the (L) to a predetermined length.

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