Mold insert pin and injection mold

Abstract

The invention provides a mold insert pin and an injection mold, the mold insert pin comprises an insert pin main body and an elastic piece, and a mounting groove is formed in the peripheral side surface of one end of the insert pin main body; the elastic piece is embedded in the mounting groove, the elastic piece is bent and extends back and forth in the length direction of the mounting groove and the depth direction of the mounting groove, a first bent part is formed in the bent position, close to a groove opening of the mounting groove, of the elastic piece, and the first bent part extends out of the mounting groove from the groove opening of the mounting groove; and when the metal insert is arranged outside the end, provided with the mounting groove, of the insert pin main body in a sleeving manner, the first bending part elastically abuts against the inner side wall of the metal insert. The wavy elastic part is embedded in the mounting groove of the insert pin main body, the first bent part of the elastic part extends out of the mounting groove, and when the metal insert is arranged at the end, where the elastic part is embedded, of the insert pin main body in a sleeving manner, the metal insert is in contact positioning through the first bent part; therefore, the metal insert is prevented from falling off from the insert pin main body in the injection molding and mold closing process.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of injection molding, and in particular to a mold insert and an injection mold. Background Art

[0002] In the field of new energy vehicles, more and more functional parts are injected with metal inserts into plastic molds. The traditional positioning method of metal curling / bushing inserts and plastic molds is that a metal insert is mounted on the mold pin. Since the metal insert has a processing tolerance band, the metal insert is loose when it is installed on the mold pin. In this way, the metal insert vibrates during the injection molding process, and the metal insert is easy to fall off, resulting in defective products, and even the injection mold is crushed, resulting in huge waste. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a mold insert pin and an injection mold, aiming to solve the risk of the injection mold being crushed due to the problem that the existing metal insert is easily dropped when being installed into the mold insert pin.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a mold insert pin, comprising:

[0005] A needle inserting body, wherein a mounting groove is arranged on a peripheral side surface of one end of the needle inserting body;

[0006] An elastic member, the elastic member is embedded in the mounting groove, the elastic member is bent back and forth and extended along the length direction of the mounting groove and along the depth direction of the mounting groove, and the bending part of the elastic member close to the notch of the mounting groove forms a first bending part, and the first bending part extends from the notch of the mounting groove to the outside of the mounting groove;

[0007] Wherein, when the metal insert is sleeved outside the end of the insert pin body provided with the mounting groove, the first bending portion elastically abuts against the inner side wall of the metal insert.

[0008] Preferably, in the mold insert, the bending portion of the first bending portion formed by the elastic member is arranged in an arc-shaped transition.

[0009] Preferably, in the mold insert, the elastic member is arranged in a W shape.

[0010] Preferably, in the mold insert, the elastic member forms a first bending portion.

[0011] Preferably, in the mold insert, both ends of the elastic member in the extension direction of the elastic member are located in the installation groove.

[0012] Preferably, in the mold insert, two ends of the elastic member in the extension direction of the elastic member respectively abut against two groove side walls of the mounting groove in the length direction of the mounting groove.

[0013] Preferably, in the mold insert pin, the mounting groove has a first groove side wall and a second groove side wall opposite to each other in the length direction of the mounting groove, and the elastic member is respectively provided with a first elastic arm and a second elastic arm at both ends in the extension direction of the elastic member, one end of the first elastic arm abuts against the first groove side wall, and the first elastic arm is inclined toward the groove opening or groove bottom of the mounting groove in a direction away from the first groove side wall, and one end of the second elastic arm abuts against the second groove side wall, and the second elastic arm is inclined toward the groove opening or groove bottom of the mounting groove in a direction away from the second groove side wall.

[0014] Preferably, in the mold insert, the elastic member forms a second bent portion at a bend near the bottom of the mounting groove, and the second bent portion abuts against the bottom wall of the mounting groove.

[0015] Preferably, in the mold insert pin, a plurality of the mounting grooves are arranged on the insert pin body at intervals along the circumference of the insert pin body, and one of the elastic members is embedded in each of the mounting grooves.

[0016] Preferably, in the mold insert pin, the mounting groove is arranged to extend along the axial direction of the insert pin body.

[0017] Preferably, in the mold insert pin, the insert pin body is symmetrically provided with two said installation grooves, the insert pin body is provided with a connecting hole, the connecting hole is located between the two said installation grooves, the groove bottoms of the two said installation grooves are connected through the connecting hole, and an abutting limit piece is embedded in the connecting hole;

[0018] The two elastic members are respectively embedded in the two installation grooves, and the two elastic members are respectively abutted against the two sides of the abutment and limiting member in the depth direction of the installation groove.

[0019] In order to achieve the above object, the present invention also provides an injection mold, including the above mold insert pin.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention embeds a wavy elastic member at the mounting groove of the pin insert body, and the first bent portion of the elastic member extends out of the mounting groove. When the metal insert is sleeved on one end of the pin insert body where the elastic member is embedded, the first bent portion is used to contact and position the metal insert, thereby ensuring that the metal insert will not fall off the pin insert body during the injection molding process. The mold pin insert adopts a structural design that can prevent the metal insert from falling off, and has been tested to be reliable and feasible. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0023] Figure 1 It is a structural schematic diagram of an assembly of a mold insert pin and a metal insert in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A cross-sectional view of the assembly of the middle mold pin and the metal insert;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the middle mold pin;

[0027] Figure 5 for Figure 4 Schematic diagram of the structure of the middle mold pin after removing the pin body.

[0028] Description of the accompanying drawings of the present invention:

[0029] Mold insert pin 100, insert pin body 1, mounting groove 11, first groove side wall 111, second groove side wall 112, connecting hole 12, annular abutment surface 13, elastic member 2, first bending portion 21, first elastic arm 22, second elastic arm 23, second bending portion 24, abutment limit member 3, metal insert 200.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] In order to prevent the metal insert from falling off during the injection molding process, the present invention provides a mold insert pin, which can be applied to metal insert injection molding products with metal curling / bushing inserts. Figures 1 to 5 A preferred embodiment of the mold insert pin provided by the present invention is shown.

[0035] See also Figures 1 to 5 In this embodiment, the mold insert pin 100 includes an insert pin body 1 and an elastic member 2. A mounting groove 11 is provided on the peripheral side surface of one end of the insert pin body 1; the elastic member 2 is embedded in the mounting groove 11, and the elastic member 2 is bent back and forth and extended along the length direction of the mounting groove 11 and along the depth direction of the mounting groove 11. The elastic member 2 forms a first bent portion 21 at the bending portion of the notch of the mounting groove 11, and the first bent portion 21 extends from the notch of the mounting groove 11 to the outside of the mounting groove 11; wherein, when the metal insert 200 is sleeved outside the end of the insert pin body 1 provided with the mounting groove 11, the first bent portion 21 elastically abuts against the inner side wall of the metal insert 200.

[0036] Specifically, the material of the pin body 1 can be metal, etc., that is, the pin body 1 can be a metal pin, etc. One end of the pin body 1 is usually arranged on the upper mold or the lower mold of the injection mold. The following is an introduction taking the case where the pin body 1 is arranged on the lower mold of the injection mold as an example. The axial direction of the pin body 1 is up and down, and the lower end of the pin body 1 is arranged on the lower mold of the injection mold. The metal insert 200 can be inserted downward from the upper end of the pin body 1 from directly above the pin body 1. The shape of the upper end of the pin body 1 is usually compatible with the shape of the metal insert 200. For example, refer to Figures 1 to 5 In this embodiment, the upper end of the insert pin body 1 is cylindrical, and the metal insert 200 is cylindrical.

[0037] During the injection molding process of the injection molded product, the metal insert 200 is first mounted on the upper end of the pin body 1, and then injection molding is performed. At this time, the outer wall of the metal insert 200 will be covered by the injection molding material to form a plastic part (not shown in the figure) on the outside of the metal insert 200. The outer wall of the metal insert 200 is tightly combined with the plastic part to form a metal insert injection molded product.

[0038] The upper end of the needle body 1 is provided with a mounting groove 11 on the circumferential side surface, and the extending direction of the mounting groove 11 (i.e., the length direction of the mounting groove 11) can be the axial direction of the needle body 1, the circumferential direction of the needle body 1, a direction inclined at a certain angle relative to the axial direction of the needle body 1, or a direction inclined at a certain angle relative to the circumferential direction of the needle body 1. Optionally, please refer to Figures 1 to 5 In this embodiment, the mounting groove 11 is extended along the axial direction of the pin insert body 1, that is, the length direction of the mounting groove 11 is the up-down direction, and the depth direction of the mounting groove 11 is generally the radial direction of the pin insert body 1. The following description will be made by taking the length direction of the mounting groove 11 as the up-down direction and the depth direction of the mounting groove 11 as the radial direction of the pin insert body 1 as an example.

[0039] An elastic member 2 is embedded in the mounting groove 11 of the insert needle body 1. The elastic member 2 is formed by bending back and forth along the length direction of the mounting groove 11 and along the depth direction of the mounting groove 11, made of elastic materials such as metal. For example, the elastic member 2 can be formed by bending back and forth along the length direction of the mounting groove 11 and along the depth direction of the mounting groove 11, made of metal wire or metal sheet. The elastic member 2 that bends back and forth along the length direction of the mounting groove 11 and along the depth direction of the mounting groove 11 is arranged in a wave shape as a whole, and the wave-shaped elastic member 2 has one or more bends. When the elastic member 2 has one bend, the elastic member 2 is arranged in a V shape, and the one bend of the elastic member 2 forms a first bend 21. When the elastic member 2 has multiple bends, the bend near the notch of the mounting groove 11 among the multiple bends of the elastic member 2 is the wave crest of the elastic member 2, and the bend near the notch of the mounting groove 11 among the multiple bends of the elastic member 2 is the wave trough of the elastic member 2.

[0040] The elastic member 2 may have one or more crests. When the elastic member 2 has one crest, the crest of the elastic member 2 extends out of the mounting groove 11 to form a first bent portion 21. When the elastic member 2 has multiple crests, all crests of the elastic member 2 may extend out of the mounting groove 11 to form multiple first bent portions 21; or part of the crests of the elastic member 2 may extend out of the mounting groove 11 to form the first bent portion 21, while the remaining crests are located in the mounting groove 11. Optionally, please refer to Figures 1 to 5 In this embodiment, the elastic member 2 is formed with a first bending portion 21 , that is, the elastic member 2 has only one crest extending out of the mounting groove 11 .

[0041] The elastic member 2 is arranged in a wave shape as a whole, and the specific number of crests and troughs of the elastic member 2 can be set according to actual conditions. Figures 1 to 5 In this embodiment, the elastic member 2 is arranged in a W shape. The W-shaped elastic member 2 has three bends. When the W-shaped elastic member 2 is installed in the mounting groove 11, the three bends of the elastic member 2 form a wave crest and two wave troughs respectively; when the W-shaped elastic member 2 is installed in the mounting groove 11 inverted, the three bends of the elastic member 2 form two wave crests and one wave trough respectively. The following will take the elastic member 2 being arranged in a W shape and the elastic member 2 being installed in the mounting groove 11 as an example for description, so that the elastic member 2 forms a first bend 21.

[0042] When the metal insert 200 is installed on the upper end of the pin body 1, the inner wall of the metal insert 200 will abut against the first bent portion 21 of the elastic member 2, causing the first bent portion 21 to deform toward the bottom of the mounting groove 11. After the metal insert 200 is installed in place, the deformed first bent portion 21 will elastically abut against the inner wall of the metal insert 200, thereby achieving contact and positioning of the metal insert 200 through the first bent portion 21, so as to ensure that the metal insert 200 will not fall off the pin body 1 during the injection molding process.

[0043] The present invention embeds a wavy elastic member 2 at the mounting groove 11 of the pin insert body 1, and the first bent portion 21 of the elastic member 2 extends out of the mounting groove 11. When the metal insert 200 is sleeved on one end of the pin insert body 1 where the elastic member 2 is embedded, the metal insert 200 is contacted and positioned by the first bent portion 21, thereby ensuring that the metal insert 200 will not fall off the pin insert body 1 during the injection molding process. The mold pin insert 100 adopts a structural design that can prevent the metal insert 200 from falling off, which has been tested and verified to be reliable and feasible.

[0044] Optionally, see Figures 1 to 5 In this embodiment, the bend of the first bend portion 21 of the elastic member 2 is arranged in an arc-shaped transition. The first bend portion 21 is arranged in an arc shape, and the protruding direction of the first bend portion 21 is the direction away from the bottom of the installation groove 11. In this way, when the metal insert 200 is installed downward and contacts the first bend portion 21, the metal insert 200 can be mounted on the upper end of the pin body 1 with less effort.

[0045] The insert pin body 1 may be provided with one or more elastic members 2. Figures 1 to 5 In this embodiment, a plurality of mounting grooves 11 are arranged at intervals along the circumference of the pin body 1, and an elastic member 2 is embedded in each mounting groove 11. Thus, the metal insert 200 is contacted and positioned by the plurality of elastic members 2, which is conducive to ensuring the coaxiality between the metal insert 200 and the pin body 1.

[0046] For further information, see Figures 1 to 5 In this embodiment, two mounting grooves 11 are symmetrically arranged on the insert pin body 1, and the two elastic members 2 are respectively embedded in the two mounting grooves 11.

[0047] Specifically, the two mounting grooves 11 are arranged correspondingly with respect to the central axis of the pin insert body 1, and the angle between the two mounting grooves 11 is 180°. Two elastic members 2 are provided, and the two elastic members 2 are respectively embedded in the two mounting grooves 11. Thus, the metal insert 200 is contacted and positioned by the two elastic members 2, which is not only conducive to ensuring the coaxiality between the metal insert 200 and the pin insert body 1, but also makes the structure of the mold pin insert 100 relatively simple. The following will take the case where the pin insert body 1 is provided with two mounting grooves 11 and two elastic members 2 as an example for description.

[0048] The two ends of the elastic member 2 in the extension direction of the elastic member 2 can be located inside the mounting groove 11; the two ends of the elastic member 2 in the extension direction of the elastic member 2 can also be located outside the mounting groove 11; the two ends of the elastic member 2 in the extension direction of the elastic member 2 can also be one located outside the mounting groove 11 and the other located inside the mounting groove 11.

[0049] Optionally, see Figures 1 to 5 In this embodiment, both ends of the elastic member 2 in the extension direction of the elastic member 2 are located in the installation groove 11. This can prevent the two ends of the elastic member 2 from extending out of the installation groove 11, thereby interfering with the installation of the metal insert 200 and increasing the difficulty of installing the metal insert 200.

[0050] Optionally, see Figures 1 to 5 In this embodiment, two ends of the elastic member 2 in the extension direction of the elastic member 2 respectively abut against two groove side walls of the mounting groove 11 in the length direction of the mounting groove 11 .

[0051] Specifically, two ends of the elastic member 2 respectively abut against the upper groove side wall and the lower groove side wall of the installation groove 11, so that the elastic member 2 can be installed and positioned upward in the upper and lower directions.

[0052] For further information, see Figures 1 to 5 In the present embodiment, the mounting groove 11 has a first groove side wall 111 and a second groove side wall 112 which are opposite to each other in the length direction of the mounting groove 11, and the elastic member 2 is respectively provided with a first elastic arm 22 and a second elastic arm 23 at both ends in the extension direction of the elastic member 2, one end of the first elastic arm 2 abuts against the first groove side wall 111, and the first elastic arm 22 is inclined toward the groove opening or groove bottom of the mounting groove 11 in a direction away from the first groove side wall 111, and one end of the second elastic arm 23 abuts against the second groove side wall 112, and the second elastic arm 23 is inclined toward the groove opening or groove bottom of the mounting groove 11 in a direction away from the second groove side wall 112.

[0053] Specifically, the first groove side wall 111 is the upper groove side wall of the mounting groove 11, and the second groove side wall 112 is the lower groove side wall of the mounting groove 11. The first elastic arm 22 and the second elastic arm 23 are located in the mounting groove 11. When the W-shaped elastic member 2 is installed in the mounting groove 11, the first elastic arm 22 is inclined from top to bottom toward the groove bottom of the mounting groove 11, and the second elastic arm 23 is inclined from bottom to top toward the groove bottom of the mounting groove 11. When the W-shaped elastic member 2 is invertedly installed in the mounting groove 11, the first elastic arm 22 is inclined from top to bottom toward the notch of the mounting groove 11, and the second elastic arm 23 is inclined from bottom to top toward the notch of the mounting groove 11.

[0054] When the elastic member 2 is installed in the mounting groove 11 , the first elastic arm 22 elastically abuts against the lower side of the first groove side wall 111 , and the second elastic arm 23 elastically abuts against the upper side of the second groove side wall 112 , thereby fixing the elastic member 2 in the mounting groove 11 .

[0055] Optionally, see Figures 1 to 5 In this embodiment, a second bending portion 24 is formed at a bending portion of the elastic member 2 close to the bottom of the installation groove 11 , and the second bending portion 24 abuts against the bottom wall of the installation groove 11 .

[0056] Specifically, the second bending portion 24 is formed at the trough of the elastic member 2, and the bending portion (i.e., the trough) where the second bending portion 24 is formed on the elastic member 2 is usually also arranged in an arc-shaped transition. When the elastic member 2 is installed in the installation groove 11, the second bending portion 24 abuts against the bottom wall of the installation groove 11, so that the elastic member 2 can be installed and positioned in the depth direction of the installation groove 11.

[0057] As described above, two mounting grooves 11 are symmetrically arranged on the insert pin body 1, and the groove bottoms of the two mounting grooves 11 may be connected or not connected. Figures 1 to 5 In this embodiment, a connecting hole 12 is provided in the insert main body 1, and the connecting hole 12 is located between the two mounting grooves 11. The bottoms of the two mounting grooves 11 are connected through the connecting hole 12, and a contact limiter 3 is embedded in the connecting hole 12; the two elastic members 2 are respectively contacted with the two sides of the contact limiter 3 in the depth direction of the mounting groove 11.

[0058] Specifically, the shape of the connecting hole 12 matches the shape of the mounting groove 11, and the connecting hole 12 penetrates the groove bottom walls of the two mounting grooves 11, so that the groove bottoms of the two mounting grooves 11 are connected through the connecting hole 12. The shape of the abutting limiter 3 matches the shape of the connecting hole 12, and the abutting limiter 3 is fixed to the connecting hole 12 by means of inlaying. The elastic members 2 at the two mounting grooves 11 are abutted against the abutting limiter 3, so that the abutting limiter 3 forms the groove bottom walls of the two mounting grooves 11. In this way, a through groove can be processed on the needle insert body 1, and the through groove is a combination of the two mounting grooves 11 and the connecting hole 12, thereby reducing the processing difficulty of processing the two mounting grooves 11 on the needle insert body 1.

[0059] Optionally, see Figures 1 to 5 In this embodiment, there is a clearance fit between the insert pin body 1 and the metal insert 200 .

[0060] Specifically, there is a clearance fit between the upper end of the needle body 1 and the metal insert 200, that is, the diameter of the upper end of the needle body 1 is slightly smaller than the inner diameter of the metal insert 200, so that the peripheral side surface of the upper end of the needle body 1 and the inner side wall of the metal insert 200 are spaced apart, and the two are not in contact and a gap is formed. The gap between the upper end of the needle body 1 and the metal insert 200 can be appropriately enlarged, and the metal insert 200 and the needle body 1 are positioned by the flexibility of the elastic member 2. For example, the gap between the needle body 1 and the metal insert 200 can be enlarged based on the preset processing tolerance of the metal insert 200.

[0061] Optionally, see Figures 1 to 5 In this embodiment, an annular abutting surface 13 facing the elastic member 2 is formed on the circumferential side surface of the insert needle body 1; when the metal insert 200 is sleeved outside the end of the insert needle body 1 provided with the mounting groove 11, the annular abutting surface 13 abuts against one end of the metal insert 200.

[0062] Specifically, an upward annular abutment surface 13 is formed on the circumferential side surface of the needle insert body 1, and the annular abutment surface 13 is located below the mounting groove 11. During the assembly process of the metal insert 200 and the needle insert body 1, the annular abutment surface 13 is used to abut against the lower end surface of the metal insert 200 to limit the metal insert 200 upward and downward.

[0063] Optionally, see Figures 1 to 5 In this embodiment, a chamfer is provided at the connection between the upper end surface of the needle body 1 and the peripheral side surface of the needle body 1, so that during the assembly process of the metal insert 200 and the needle body 1, the connection can be prevented from contacting the metal insert 200.

[0064] The present invention also provides an injection mold, which can be used to produce metal insert injection molded products, and the injection mold is mainly used for metal insert injection molded products with metal curling / bushing inserts. The injection mold includes a mold insert pin, and since the mold insert pin adopts the technical solution of the above embodiment, it has the beneficial effects brought by the technical solution of the above embodiment.

[0065] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A mold needle, characterized in that: include: A needle inserting body, wherein a mounting groove is arranged on a peripheral side surface of one end of the needle inserting body; An elastic member, the elastic member is embedded in the mounting groove, the elastic member is bent back and forth and extended along the length direction of the mounting groove and along the depth direction of the mounting groove, and the bending part of the elastic member close to the notch of the mounting groove forms a first bending part, and the first bending part extends from the notch of the mounting groove to the outside of the mounting groove; Wherein, when the metal insert is sleeved outside the end of the insert pin body provided with the mounting groove, the first bending portion elastically abuts against the inner side wall of the metal insert.

2. The mold insert according to claim 1, characterized in that: The bending part of the elastic member forming the first bending portion is arranged in an arc-shaped transition.

3. The mold insert according to claim 1, characterized in that: The elastic member is arranged in a W shape; and / or, The elastic member is formed with a first bending portion.

4. The mold insert according to claim 1, characterized in that: Both ends of the elastic member in the extension direction of the elastic member are located in the installation groove.

5. The mold insert according to claim 1, characterized in that: Two ends of the elastic member in the extension direction of the elastic member respectively abut against two groove side walls of the mounting groove in the length direction of the mounting groove.

6. The mold insert according to claim 5, characterized in that: The mounting groove has a first groove side wall and a second groove side wall opposite to each other in the length direction of the mounting groove, and the elastic member is respectively provided with a first elastic arm and a second elastic arm at both ends in the extension direction of the elastic member, one end of the first elastic arm abuts against the first groove side wall, and the first elastic arm is inclined toward the groove opening or the groove bottom of the mounting groove in a direction away from the first groove side wall, and one end of the second elastic arm abuts against the second groove side wall, and the second elastic arm is inclined toward the groove opening or the groove bottom of the mounting groove in a direction away from the second groove side wall.

7. The mold insert according to claim 1, characterized in that: The elastic member forms a second bent portion at a bent position close to the groove bottom of the installation groove, and the second bent portion abuts against the groove bottom wall of the installation groove.

8. The mold insert according to claim 1, characterized in that: The needle inserting body is provided with a plurality of the mounting grooves at intervals along the circumference of the needle inserting body, and each mounting groove is provided with an elastic member embedded therein; and / or, The mounting groove is arranged to extend along the axial direction of the pin inserting body.

9. The mold insert according to claim 8, characterized in that: The insert pin body is symmetrically provided with two installation grooves, and a connecting hole is provided in the insert pin body. The connecting hole is located between the two installation grooves, and the groove bottoms of the two installation grooves are connected through the connecting hole. An abutment limiter is embedded in the connecting hole. The two elastic members are respectively embedded in the two installation grooves, and the two elastic members are respectively abutted against the two sides of the abutment and limiting member in the depth direction of the installation groove.

10. An injection mold, characterized in that: Comprising the mold insert pin as described in any one of claims 1-9.

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