Inserting core mold and using method thereof

Abstract

The invention relates to the technical field of dies, and discloses a core inserting die which comprises a die body, and a die cavity is formed in the die body. One end of the pin block is connected with a guide pin extending into the die cavity, and one end, far away from the pin block, of the guide pin extends out of the die cavity; the needle seat is arranged on the other side, opposite to the needle inserting block, of the die body and comprises a first needle seat body and a second needle seat body, the first needle seat body comprises a first guide needle containing groove formed towards the second needle seat body, and the second needle seat body comprises a second guide needle containing groove formed opposite to the first guide needle containing groove; and the first guide pin accommodating groove and the second guide pin accommodating groove form a first guide hole for accommodating a guide pin. The needle seat is designed to be of a split structure composed of the first needle seat and the second needle seat, so that the end, extending out of the mold cavity, of the guide needle is contained in the first guide hole in the forming process, the guide needle can be wrapped more tightly, the gap between the guide needle and the first guide hole is reduced, injection materials are effectively prevented from flowing into the first guide hole, and the injection efficiency is improved. Therefore, the MT insertion core is ensured to have excellent location degree.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and in particular to a core insert mold and a use method thereof. Background Art

[0002] As the core component of multi-core fiber connectors, MT ferrules are widely used in the field of optical communications due to their high throughput and high fiber wiring density. The position, aperture, opening angle and other related indicators of the fiber hole in the MT ferrule have a significant impact on the performance of the connector, so the molds used to produce MT ferrules must have extremely high precision.

[0003] Currently, the common molds for MT ferrule molding include the following components: upper metal mold, lower metal mold, pin block, core pin, guide pin, and pin seat. MT ferrules have a position index. Position index refers to the deviation between the center line of the two guide holes of the MT ferrule and the reference line. The smaller the deviation, the better the position index. When the MT ferrule is molded, the guide pin matches the guide pin hole on the pin seat. Since the guide pin and the guide hole on the pin seat are clearance fit, the molten injection material easily flows into the guide pin hole, causing the guide pin to have a certain position deviation during the MT ferrule molding process, which eventually leads to the deterioration of the position index of the MT ferrule. Summary of the invention

[0004] The purpose of the present invention is to provide a core insert mold and a method for using the same, which can wrap the guide pin more tightly, reduce the gap between the guide pin and the guide hole, and effectively reduce the injection material flowing into the guide hole, thereby ensuring that the MT core insert has excellent positioning accuracy.

[0005] In order to achieve the above object, the present invention provides a core insert mold, comprising:

[0006] A mold body, wherein a mold cavity is formed inside the mold body;

[0007] A pin block, the pin block is arranged on one side of the mold body, a core pin and a guide pin are arranged on an end surface of the pin block facing the mold cavity, the core pin extends into the mold cavity, and the guide pin passes through the mold cavity and extends to the other side of the mold body relative to the pin block;

[0008] A needle seat, wherein the needle seat is arranged on the other side of the mold body relative to the pin block, the needle seat includes a first needle seat and a second needle seat that cooperate with each other, the first needle seat includes a first guide needle accommodating groove opened toward the second needle seat, the second needle seat includes a second guide needle accommodating groove arranged opposite to the first guide needle accommodating groove, the first guide needle accommodating groove and the second guide needle accommodating groove form a first guide hole for accommodating the guide needle.

[0009] Compared with the prior art, a core insert mold according to an embodiment of the present invention has the following beneficial effects: a mold body is provided with a pin block and a pin seat on both sides, a guide pin on the pin block extends to the pin seat through the mold cavity of the mold body, the pin seat comprises a first pin seat and a second pin seat, the first pin seat and the second pin seat are provided with a first guide pin accommodating groove and a second guide pin accommodating groove opposite to each other, the first guide pin accommodating groove and the second guide pin accommodating groove form a first guide hole when the first pin seat and the second pin seat are combined, and the first guide hole is used to fix one end of the guide pin extending out of the mold cavity; by designing the pin seat as a split structure composed of the first pin seat and the second pin seat, during the molding process, one end of the guide pin extending out of the mold cavity extends into the first guide hole surrounded by the first guide pin accommodating groove of the first pin seat and the second guide pin accommodating groove of the second pin seat, when the first pin seat and the second pin seat are fixed to each other, the guide pin can be wrapped more tightly, the gap between the guide pin and the first guide hole is reduced, and the injection material flowing into the first guide hole is effectively reduced, thereby ensuring that the MT core insert has excellent positioning accuracy.

[0010] The insert mold of the embodiment of the present invention has a first opening portion opened in the width direction of the first needle seat, a first adjustable insert is arranged in the first opening portion, a second opening portion opened in the width direction of the second needle seat, a second adjustable insert arranged opposite to the first adjustable insert is arranged in the second opening portion, the first adjustable insert includes a first groove opened toward the second adjustable insert, the second adjustable insert includes a second groove symmetrically arranged with the first groove, and the first groove and the second groove form the second guide hole when the first adjustable insert and the second adjustable insert are combined.

[0011] The insert mold of the embodiment of the present invention has a first spacer for adjusting the first adjustable insert between the first adjustable insert and the inner wall of the first opening in the width direction of the needle seat, and a second spacer for adjusting the second adjustable insert between the second adjustable insert and the second opening.

[0012] In the insert mold of the embodiment of the present invention, in the width direction of the needle seat, the distance between the first adjustable insert and the first opening is W1, and the distance between the second adjustable insert and the second opening is W2, and W1 and W2 satisfy:

[0013] 0.1mm≤W1≤0.5mm, 0.1mm≤W2≤0.5mm.

[0014] In the insert mold of the embodiment of the present invention, a first fastening screw hole connected to the first opening portion is opened in the length direction of the first needle seat, a first fastening bolt is passed through the first fastening screw hole, and one end of the first fastening bolt facing the first opening portion abuts against the first adjustable insert; a second fastening screw hole connected to the second opening portion is opened in the length direction of the second needle seat, a second fastening bolt is passed through the second fastening screw hole, and one end of the second fastening bolt facing the second opening portion abuts against the second adjustable insert.

[0015] In the core insert mold of the embodiment of the present invention, the mold body includes a first mold body and a second mold body arranged opposite to each other, the mold cavity is formed between the first mold body and the second mold body, and guide needle cavities for the guide needle to pass through are also formed on both sides of the mold cavity.

[0016] In the insert mold of the embodiment of the present invention, the needle seat includes a locking screw hole that penetrates the first needle seat and the second needle seat in the thickness direction thereof, and a locking bolt is passed through the locking screw hole to fix the first needle seat and the second needle seat.

[0017] In the core inserting mold of the embodiment of the present invention, a protrusion is formed on the end surface of the pin block facing the mold body, and the protrusion is inclined toward the end surface of the mold body in a direction toward the pin block.

[0018] In the core insert mold of the embodiment of the present invention, the angle between the inclined surface of the protrusion and the end surface of the pin block on one side facing the mold body is 8°±0.15°.

[0019] The present invention provides a method for using a core insert mold, using the core insert mold described in any one of the above embodiments, comprising the following steps:

[0020] The pin block is arranged on one side of the mold body, so that one end of the guide pin connected to the pin block passes through the mold cavity and then extends to the outside of the mold cavity;

[0021] The second needle seat is arranged on the other side of the mold body, and the end of the guide needle extending out of the mold cavity is accommodated in the second guide needle accommodating groove, and then the first needle seat is combined with the second needle seat, and the first adjustable insert is arranged in the first opening part, and the second adjustable insert is arranged in the second opening part, so that the end of the guide needle extending out of the mold cavity is accommodated in the first guide hole and the second guide hole in sequence;

[0022] Adjusting the positions of the first adjustable insert and the second adjustable insert in the thickness direction and the width direction of the needle seat so that the axes of the guide needle and the core needle are parallel to each other and located on the same horizontal plane, then fixing the first adjustable insert and the second adjustable insert, and finally locking the first upper needle seat and the second needle seat;

[0023] The molds are closed, and the injection molding material is injected into the mold cavity and solidified.

[0024] Open the mold.

[0025] Compared with the prior art, the ferrule mold according to the embodiment of the present invention has the following beneficial effects: by designing the needle seat as a split structure consisting of a first needle seat and a second needle seat, one end of the guide pin extending out of the mold cavity enters into a first guide hole surrounded by a first guide pin accommodating groove of the first needle seat and a second guide pin accommodating groove of the second needle seat during the molding process to complete fixation, the guide pin can be wrapped more tightly, the gap between the guide pin and the first guide hole can be reduced, and the injection material flowing into the first guide hole can be effectively reduced, thereby ensuring that the MT ferrule has excellent positioning accuracy; after the guide pin extends out of the first guide hole, it enters into a second guide hole formed by a combination of the first adjustable insert and the second adjustable insert. When the guide pin is offset in the thickness or width direction of the needle seat, the guide pin offset problem can be solved by adjusting the positions of the first and second adjustable inserts in different directions relative to the needle seat, thereby achieving improved positioning accuracy, and further ensuring that the MT ferrule has excellent positioning accuracy.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the core insert mold according to an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the exploded structure of the core insert mold according to an embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the exploded structure of the needle seat of the core insert mold according to an embodiment of the present invention;

[0030] Figure 4 1 is a schematic structural diagram of a pin block of a core insert mold according to an embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of the core insert mold before molding according to an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of the MT ferrule after forming of the ferrule mold according to an embodiment of the present invention;

[0033] Figure 7 is a top view schematic diagram of the core insert mold of an embodiment of the present invention without the first mold body;

[0034] Figure 8 It is a schematic diagram of the structure of the MT plug according to an embodiment of the present invention.

[0035] In the figure, 1, mold body; 11, mold cavity; 12, boss; 13, first mold body; 14, second mold body; 15, guide pin cavity; 2, pin block; 21, guide pin; 22, raised portion; 23, guide pin hole; 3, needle seat; 31, first needle seat; 311, first guide pin accommodating groove; 312, first opening portion; 313, first fastening screw hole; 314, first fastening bolt; 32, second needle seat; 321, second guide pin accommodating groove; 322, second opening portion; 323, second fastening screw hole; 324, second fastening bolt; 33, first guide hole; 34, first adjustable insert; 341, first groove; 342, first spacer; 35, second adjustable insert; 351, second groove; 36, locking screw hole; 37, locking bolt; 4, insert. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] like Figure 1 and Figure 2As shown, a core inserting mold of a preferred embodiment of the present invention comprises a mold body 1, a pin block 2 and a pin seat 3. A mold cavity 11 is formed inside the mold body 1, a boss 12 is arranged in the mold cavity 11, and a core guide hole is arranged on the boss 12; a front end opening and a rear end opening are designed at both ends of the mold cavity 11. When the mold is closed, the pin block 2 is covered at the front end opening in a manner of blocking the mold cavity 11, and the pin seat 3 is covered at the rear end opening in a manner of blocking the mold cavity 11; the pin block 2 is arranged on one side of the mold body 1, and a guide pin 21 is arranged on the end surface of the pin block 2 on one side facing the mold cavity. The guide pin 21 has two guide pins, which are symmetrically distributed at both ends of the pin block 2 in the width direction. The guide pin 21 passes through the mold cavity 11 and extends to the other side of the mold body 1 relative to the pin block 2; further, a guide pin hole 23 for fixing the guide pin 21 is opened on the pin block 2, and a core pin corresponding to the core guide hole is also arranged on the side of the pin block 2 facing the mold body 1, and the core pin is inserted into the core guide hole when the mold is closed.

[0041] The needle seat 3 is arranged on the other side of the mold body 1 relative to the pin block 2, and the end of the needle seat 3 facing the mold body 1 extends into the mold cavity 11 when the mold is closed; the needle seat 3 includes a first needle seat 31 and a second needle seat 32 that match each other, and the first needle seat 31 and the second needle seat 32 are symmetrically arranged in the thickness direction of the needle seat 3 and have the same shape; the first needle seat 31 includes a first guide needle accommodating groove 311 opened toward the second needle seat 32, and the second needle seat 32 includes a second guide needle accommodating groove 321 arranged opposite to the first guide needle accommodating groove 311, and the first guide needle accommodating groove 311 and the second guide needle accommodating groove 321 are both semicircular grooves, and the first guide needle accommodating groove 311 and the second guide needle accommodating groove 321 form a first guide hole 33 for accommodating the guide needle 21, and the inner diameter of the first guide hole 33 matches the outer diameter of the guide needle 21.

[0042] In the present application, the mold body 1 has a pin block 2 and a needle seat 3 on both sides, the guide needle 21 extends to the needle seat 3 through the mold cavity 11 of the mold body 1, and the first needle seat 31 and the second needle seat 32 are provided with a first guide needle receiving groove 311 and a second guide needle receiving groove 321 opposite to each other. The first guide needle receiving groove 311 and the second guide needle receiving groove 321 form a first guide hole 33 when the first needle seat 31 and the second needle seat 32 are combined. The first guide hole 33 is used to fix one end of the guide needle 21 extending out of the mold cavity 11; by designing the needle seat 3 to be composed of the first needle seat 31 and The split structure formed by the second needle seat 32 allows the end of the guide needle 21 extending out of the mold cavity 11 to extend into the first guide hole 33 surrounded by the first guide needle accommodating groove 311 of the first needle seat 31 and the second guide needle accommodating groove 321 of the second needle seat 32 during the molding process. When the first needle seat 31 and the second needle seat 32 are fixed to each other, the guide needle 21 can be wrapped more tightly, reducing the gap between the guide needle 21 and the first guide hole 33, effectively reducing the injection material flowing into the first guide hole 33, thereby ensuring that the MT ferrule has excellent positioning accuracy.

[0043] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, a first opening portion 312 is opened in the width direction of the first needle seat 31, and the first opening portion 312 is arranged to penetrate in the thickness direction of the first needle seat 31. A first adjustable insert 34 is arranged in the first opening portion 312, and the first adjustable insert 34 can move in the vertical direction in the first opening. There are two first opening portions 312 and two first adjustable inserts 34, and the two first opening portions 312 are symmetrically arranged at the two ends of the width direction of the first needle seat 31; a second opening portion 322 is opened in the width direction of the second needle seat 32, and the second opening portion 322 is arranged to penetrate in the thickness direction of the second needle seat 32, and a second adjustable insert 35 arranged opposite to the first adjustable insert 34 is arranged in the second opening portion 322, and the second adjustable insert 35 can move in the vertical direction in the second opening; there are two second opening portions 322 and two second adjustable inserts 35, and the two second opening portions 322 are symmetrically arranged at the two ends of the width direction of the second needle seat 32. A second guide hole connected to the first guide hole 33 is formed between the first adjustable insert 34 and the second adjustable insert 35. The guide needle 21 passes through the first guide hole 33 and enters the second guide hole. The position of the guide needle 21 can be adjusted by the first adjustable insert 34 and the second adjustable insert 35. When the guide needle 21 is offset in the thickness direction of the needle seat 3, the position of the first adjustable insert 34 and the second adjustable insert 35 in the thickness direction of the needle seat 3 can be adjusted to solve the offset problem of the guide needle 21 and improve the positioning accuracy.

[0044] In some embodiments of the present invention, the first adjustable insert 34 includes a first groove 341 opened toward the second adjustable insert 35, and the second adjustable insert 35 includes a second groove 351 symmetrically arranged with the first groove 341. The first groove 341 and the second groove 351 are both arranged as semicircular grooves. The first groove 341 and the second groove 351 form a second guide hole when the first adjustable insert 34 and the second adjustable insert 35 are combined. The second guide hole is a circular hole position matching the size of the guide needle 21, which firmly fixes the guide needle 21 and ensures that the relative position of the guide needle 21 and the insert will not change when the first adjustable insert 34 and the second adjustable insert 35 are adjusted, thereby improving the positioning accuracy of the guide needle 21 and promoting the improvement of its positioning accuracy.

[0045] like Figure 2As shown, in some embodiments of the present invention, in the width direction of the needle seat 3, a first spacer 342 is provided between the first adjustable insert 34 and the inner wall of the first opening 312, and the first spacer 342 is used to adjust the relative position between the first adjustable insert 34 and the inner wall of the first opening 312, and a second spacer is provided between the second adjustable insert 35 and the second opening 322, and the second spacer is used to adjust the relative position between the second adjustable insert 35 and the inner wall of the second opening 322. Due to the existence of the first spacer 342 and the second spacer, the first adjustable insert 34 and the second adjustable insert 35 can move in the width direction of the needle seat 3, so that when the guide needle 21 deviates in the width direction, the deviation problem of the guide needle 21 can be solved by adjusting the positions of the first adjustable insert 34 and the second adjustable insert 35 in the width direction, thereby improving the position accuracy.

[0046] In some embodiments of the present invention, in the width direction of the needle seat 3, the distance between the first adjustable insert 34 and the first opening 312, that is, the width of the first spacer 342 is W1, and the distance between the second adjustable insert 35 and the second opening 322, that is, the width of the second spacer is W2, and W1 and W2 satisfy:

[0047] 0.1mm≤W1≤0.5mm, 0.1mm≤W2≤0.5mm.

[0048] When the width W1 of the first spacer 342 and the width W2 of the second spacer meet the above range, the first adjustable insert 34 and the second adjustable insert 35 can have sufficient movement space and the overall stability of the mold can be ensured. Preferably, W1=W2.

[0049] like Figure 2 and Figure 3 As shown, in some embodiments of the present invention, a first fastening screw hole 313 connected to the first opening portion 312 is opened in the length direction of the first needle seat 31, and a first fastening bolt 314 is passed through the first fastening screw hole 313. The first fastening bolt 314 abuts against the first adjustable insert 34 at one end facing the first opening portion 312. After the first adjustable insert 34 is adjusted, the first adjustable insert 34 is fixed to ensure stability during the casting process; a second fastening screw hole 323 connected to the second opening portion 322 is opened in the length direction of the second needle seat 32, and a second fastening bolt 324 is passed through the second fastening screw hole 323. The second fastening bolt 324 abuts against the second adjustable insert 35 at one end facing the second opening portion 322. After the second adjustable insert 35 is adjusted, the second adjustable insert 35 is fixed to ensure stability during the casting process.

[0050] In some embodiments of the present invention, the mold body 1 includes a first mold body 13 and a second mold body 14 that are relatively arranged. The first mold body 13 and the second mold body 14 are symmetrically arranged in the height direction. A mold cavity 11 is formed between the first mold body 13 and the second mold body 14. The mold cavity 11 is used to mold the MT core 4. Guide needle cavities 15 for the guide needle 21 to pass through are also formed on both sides of the mold cavity 11, and space is reserved for the guide needle 21 to pass through the mold body during the molding process.

[0051] In some embodiments of the present invention, the needle seat 3 includes a locking screw hole 36 that penetrates the first needle seat 31 and the second needle seat 32 in the thickness direction thereof, and a locking bolt 37 is inserted into the locking screw hole 36 to fix the first needle seat 31 and the second needle seat 32. The first needle seat 31 and the second needle seat 32 are locked by the locking bolt 37, which has a simple structure, is firmly fixed, and is easy to disassemble, so that the first needle seat 31 and the second needle seat 32 wrap the guide needle 21 more tightly, reduce the gap between the guide needle 21 and the first guide hole 33, and effectively reduce the injection material from flowing into the first guide hole 33, thereby ensuring that the MT ferrule 4 has excellent positioning accuracy.

[0052] The MT ferrule 4 is required to have an inclined end face when in use. In a conventional mold, the surface of the pin block 2 facing the mold cavity 11 is a flat structure. Therefore, the end face of the product after mold formation needs to be ground. During the grinding process, the position accuracy will change, and the more grinding, the greater the change in position accuracy.

[0053] like Figure 4 As shown, in some embodiments of the present invention, a protrusion 22 is formed on the end surface of the pin block 2 facing the mold body 1, and the protrusion 22 is inclined in the direction toward the pin block 2 toward the end surface of the mold body 1, so that the protrusion 22 finally forms a wedge shape. The protrusion 22 with a wedge shape can directly form an inclined surface on the end surface when the MT ferrule 4 is formed, and no grinding is required later. By providing the protrusion 22 with a wedge structure on the pin block 2, the grinding amount of the product can be reduced, thereby reducing the position change of the MT ferrule 4.

[0054] In some embodiments of the present invention, the angle between the inclined surface of the protrusion 22 and the end surface of the pin block 2 facing the mold body 1 is 8°±0.15°. Within this range, the inclination of the end surface of the MT ferrule 4 can be controlled within an appropriate range, ensuring the quality of the molded product.

[0055] A preferred embodiment of the present invention further includes a method for using a core insert mold, using the core insert mold of any one of the above embodiments, comprising the following steps:

[0056] S1, setting the pin block 2 on one side of the mold body 1, so that one end of the guide pin 21 connected to the pin block 2 passes through the mold cavity 11 and extends to the outside of the mold cavity 11;

[0057] S2, disposing the second needle seat 32 on the other side of the mold body 1, accommodating the end of the guide needle 21 extending out of the mold cavity 11 in the second guide needle accommodating groove 321, then combining the first needle seat 31 with the second needle seat 32, and disposing the first adjustable insert 34 in the first opening 312, and the second adjustable insert 35 in the second opening 322, so that the end of the guide needle 21 extending out of the mold cavity 11 is accommodated in the first guide hole 33 and the second guide hole in sequence;

[0058] S3, adjusting the positions of the first adjustable insert 34 and the second adjustable insert 35 in the thickness direction and the width direction of the needle seat 3, so that the axes of the guide needle 21 and the core needle are parallel to each other and located on the same horizontal plane, and then fixing the first adjustable insert 34 and the second adjustable insert 35, and finally locking the first needle seat 31 and the second needle seat 32;

[0059] S4, closing the mold, injecting the injection material into the mold cavity 11, and performing curing molding.

[0060] S5. Open the mold.

[0061] During the molding process, one end of the guide pin 21 extending out of the mold cavity 11 enters the first guide hole 33 surrounded by the first guide pin accommodating groove 311 of the first needle seat 31 and the second guide pin accommodating groove 321 of the second needle seat 32 to complete the fixation, which can wrap the guide pin 21 more tightly, reduce the gap between the guide pin 21 and the first guide hole 33, and effectively reduce the injection material flowing into the first guide hole 33, thereby ensuring that the MT ferrule 4 has excellent positioning accuracy; after the guide pin 21 extends out of the first guide hole 33, it enters the second guide hole formed by the combination of the first adjustable insert 34 and the second adjustable insert 35. When the guide pin 21 deviates in the thickness or width direction of the needle seat 3, the position of the first adjustable insert 34 and the second adjustable insert 35 in different directions relative to the needle seat can be adjusted to solve the deviation problem of the guide pin 21, achieve improvement in positioning accuracy, and further ensure that the MT ferrule 4 has excellent positioning accuracy.

[0062] In some embodiments of the present invention, in the mold cavity, the core needle is used to form the optical fiber hole of the MT ferrule 4, the guide needle 21 is used to form the guide hole of the MT ferrule 4, the boss 12 is used to form the window portion for adhesive injection of the MT ferrule 4, and the core needle receiving hole is used to form the optical fiber guide groove of the MT ferrule 4.

[0063] The preferred working process of the present invention is as follows: the mold body 1 has a pin block 2 and a needle seat 3 on both sides, the guide pin 21 on the pin block 2 extends to the needle seat 3 through the mold cavity 11 of the mold body 1, and the needle seat 3 includes a first needle seat 31 and a second needle seat 32, and the first needle seat 31 and the second needle seat 32 are provided with a first guide pin accommodating groove 311 and a second guide pin accommodating groove 321 opposite to each other, and the first guide pin accommodating groove 311 and the second guide pin accommodating groove 321 form a first guide hole 33 when the first needle seat 31 and the second needle seat 32 are combined, and the first guide hole 33 is used to fix one end of the guide pin 21 extending out of the mold cavity 11; by designing the needle seat 3 as a split needle seat consisting of the first needle seat 31 and the second needle seat 32 The cut-type structure allows one end of the guide pin 21 extending out of the mold cavity 11 to enter the first guide hole 33 surrounded by the first guide pin accommodating groove 311 of the first needle seat 31 and the second guide pin accommodating groove 321 of the second needle seat 32 to be fixed during the molding process, and then enter the second guide hole formed by the first adjustable insert 34 and the second adjustable insert 35. When the guide pin 21 is offset in the thickness or width direction of the needle seat 3, the position of the first adjustable insert 34 and the second adjustable insert 35 in different directions relative to the needle seat 3 can be adjusted to solve the offset problem of the guide pin 21, achieve improvement in positioning accuracy, and further ensure that the MT ferrule 4 has excellent positioning accuracy.

[0064] In summary, the embodiments of the present invention provide a core insert mold and a method for using the same, which can wrap the guide pin 21 more tightly, reduce the gap between the guide pin 21 and the first guide hole 33, effectively reduce the injection material flowing into the first guide hole 33, solve the guide pin 21 deviation problem, and improve the positioning accuracy, thereby ensuring that the MT core insert has excellent positioning accuracy.

[0065] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A core insert mold, characterized in that: include: A mold body, wherein a mold cavity is formed inside the mold body; A pin block, the pin block is arranged on one side of the mold body, a core pin and a guide pin are arranged on an end surface of the pin block facing the mold cavity, the core pin extends into the mold cavity, and the guide pin passes through the mold cavity and extends to the other side of the mold body relative to the pin block; A needle seat, wherein the needle seat is arranged on the other side of the mold body relative to the pin block, the needle seat includes a first needle seat and a second needle seat that cooperate with each other, the first needle seat includes a first guide needle accommodating groove opened toward the second needle seat, the second needle seat includes a second guide needle accommodating groove arranged opposite to the first guide needle accommodating groove, the first guide needle accommodating groove and the second guide needle accommodating groove form a first guide hole for accommodating the guide needle.

2. The core insert mold according to claim 1, characterized in that: A first opening is opened in the width direction of the first needle seat, a first adjustable insert is arranged in the first opening, a second opening is opened in the width direction of the second needle seat, a second adjustable insert arranged opposite to the first adjustable insert is arranged in the second opening, the first adjustable insert includes a first groove opened toward the second adjustable insert, the second adjustable insert includes a second groove symmetrically arranged with the first groove, and the first groove and the second groove form the second guide hole when the first adjustable insert and the second adjustable insert are combined.

3. The core insert mold according to claim 2, characterized in that: In the width direction of the needle seat, a first spacing portion for adjusting the first adjustable insert is provided between the first adjustable insert and the inner wall of the first opening, and a second spacing portion for adjusting the second adjustable insert is provided between the second adjustable insert and the second opening.

4. The core insert mold according to claim 3, characterized in that: In the width direction of the needle seat, the distance between the first adjustable insert and the first opening is W1, and the distance between the second adjustable insert and the second opening is W2, and W1 and W2 satisfy: 0.1mm≤W1≤0.5mm, 0.1mm≤W2≤0.5mm.

5. The core insert mold according to claim 2, characterized in that: A first fastening screw hole connected to the first opening is opened in the length direction of the first needle seat, a first fastening bolt is passed through the first fastening screw hole, and one end of the first fastening bolt facing the first opening abuts against the first adjustable insert; a second fastening screw hole connected to the second opening is opened in the length direction of the second needle seat, a second fastening bolt is passed through the second fastening screw hole, and one end of the second fastening bolt facing the second opening abuts against the second adjustable insert.

6. The core insert mold according to claim 1, characterized in that: The mold body comprises a first mold body and a second mold body which are arranged opposite to each other, the mold cavity is formed between the first mold body and the second mold body, and guide needle cavities for the guide needle to pass through are also formed on both sides of the mold cavity.

7. The core insert mold according to claim 1, characterized in that: The needle seat comprises a locking screw hole penetrating the first needle seat and the second needle seat in the thickness direction thereof, and a locking bolt is passed through the locking screw hole to fix the first needle seat and the second needle seat.

8. The core insert mold according to claim 1, characterized in that: A protrusion is formed on the end surface of the pin block facing the mold body, and the protrusion is inclined toward the end surface of the mold body along a direction toward the pin block.

9. The core insert mold according to claim 8, characterized in that: The angle between the inclined surface of the protrusion and the end surface of the pin block facing the mold body is 8°±0.15°.

10. A method for using a core insert mold, using the core insert mold according to any one of claims 2 to 9, characterized in that: The following steps are involved: The pin block is arranged on one side of the mold body, so that one end of the guide pin connected to the pin block passes through the mold cavity and then extends to the outside of the mold cavity; The second needle seat is arranged on the other side of the mold body, and the end of the guide needle extending out of the mold cavity is accommodated in the second guide needle accommodating groove, and then the first needle seat is combined with the second needle seat, and the first adjustable insert is arranged in the first opening part, and the second adjustable insert is arranged in the second opening part, so that the end of the guide needle extending out of the mold cavity is accommodated in the first guide hole and the second guide hole in sequence; Adjusting the positions of the first adjustable insert and the second adjustable insert in the thickness direction and the width direction of the needle seat so that the axes of the guide needle and the core needle are parallel to each other and located on the same horizontal plane, then fixing the first adjustable insert and the second adjustable insert, and finally locking the first needle seat and the second needle seat; The molds are closed, and the injection molding material is injected into the mold cavity and solidified. Open the mold.

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