Die

Abstract

The utility model relates to a mold, and belongs to the technical field of tool forming equipment. The mold comprises a first mold unit, a second mold unit and a positioning needle, the first mold unit comprises a first forming surface, and a plurality of first movable holes are formed in the first forming surface; the second mold unit comprises a second forming surface, and a plurality of first movable holes are formed in the second forming surface; the positioning needle is in sliding fit with the inner wall of the first movable hole; wherein a forming cavity for injection molding is defined by the first forming face and the second forming face, the insert is placed on the inner side of the forming cavity, and one end of the positioning needle abuts against the insert. According to the mold provided by the embodiment of the invention, the insert can be positioned, and the risk of deformation and damage of the insert, the mold and a formed product is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of processing and forming equipment, and in particular to a mold. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. Insert in-mold injection molding is a molding process in which metal parts or molded plastic parts and other external parts are placed in the mold before molding, and the plastic is fully or partially wrapped around the original parts by the injection molding machine to produce new parts. The mold corresponding to this process is the insert in-mold injection mold. At present, insert in-mold injection molding is widely used, especially for electronic components that need to withstand strong currents, which are often injected. The advantage of the insert injection mold is that the subsequent installation process is completed during the molding process, thereby saving the subsequent assembly process, and more importantly, improving the tightness of the connection between parts. However, when developing an injection mold, it is necessary to accurately position the insert in the mold. When the insert and the mold do not match well, the insert is easy to crush the mold itself, and the molded plastic product is prone to flash, which is also easy to cause deformation of the plastic product or deformation of the insert. Utility Model Content

[0003] The purpose of the present application is to provide a mold to address the above-mentioned problems, which can position the insert, reduce the risk of deformation and damage of the insert, the mold and the molded product, and improve the above-mentioned problems.

[0004] The present application provides a mold for in-mold injection molding of inserts, the mold comprising a first mold unit, a second mold unit and a positioning pin, the first mold unit comprises a first molding surface, the first molding surface is provided with a plurality of first movable holes; the second mold unit comprises a second molding surface, the second molding surface is provided with a plurality of first movable holes; the positioning pin is slidably matched with the inner wall of the first movable hole; wherein the first molding surface and the second molding surface form a molding cavity for injection molding, the insert is placed inside the molding cavity, and one end of the positioning pin abuts against the insert.

[0005] In the technical solution of the embodiment of the present application, during the use of the mold provided by the embodiment of the present application, the insert is placed and suspended in the molding cavity, the first molding surface and the second molding surface are respectively located on opposite sides of the insert, the first molding surface is provided with a plurality of first movable holes, the second molding surface is provided with a plurality of first movable holes, a positioning pin is provided in the first movable hole, the positioning pin slides with the inner wall of the first movable hole, the positioning pin slides along the movable hole until it abuts against the insert, the positioning pin arranged in the first movable hole of the first molding surface and the positioning pin arranged in the first movable hole of the second molding surface abut the insert from both sides in the vertical direction, thereby limiting the displacement of the insert in the molding cavity, reducing the risk of scratching or colliding between the insert and the first mold unit or the second mold unit, and reducing the risk of deformation or damage of the insert, the mold and the molded product caused by the displacement of the insert.

[0006] In some embodiments, the first movable hole includes a first hole segment and a second hole segment, the first hole segment is closer to the forming cavity than the second hole segment, the hole diameter of the first hole segment is smaller than the second hole segment, a step surface is formed between the first hole segment and the second hole segment, the positioning pin is provided with a protrusion, the protrusion is arranged around the positioning pin, the protrusion is located in the second hole segment and contacts with the step surface.

[0007] In the technical solution of the embodiment of the present application, the protrusion is located in the second hole section. When the positioning pin abuts against the insert, the protrusion contacts the step surface. The step surface limits the movement of the protrusion toward the molding cavity, thereby limiting the upper limit of the force applied by the positioning piece to the insert, reducing the risk of damage to the insert due to excessive squeezing of the positioning pin.

[0008] In some embodiments, a pressure plate is disposed on the side of the first mold unit and the second mold unit facing away from the molding cavity, and the positioning pin is also sleeved with an elastic member, and two ends of the elastic member are respectively in contact with the protrusion and the pressure plate.

[0009] In the technical solution of the embodiment of the present application, the pressure plate can close the opening of the second hole segment extending to the surface of the first mold unit (or the second mold unit), and the two ends of the elastic member are respectively abutted against the protrusion and the pressure plate. The positioning pin can move toward the insert under the push of the elastic force provided by the elastic member until it abuts against the insert. When the injection molding is nearly completed, the fluid in the molding cavity will apply a force on the positioning pin that is opposite to the elastic force of the elastic member. When the force applied by the fluid in the molding cavity to the positioning pin is greater than the elastic force of the elastic member, the elastic member is compressed by the force applied by the fluid in the molding cavity to the positioning pin, and the positioning pin moves away from the molding cavity along the first hole segment under the push of the fluid force. The fluid can thereby fill the internal space of the molding cavity occupied by the positioning pin, so that the molded plastic material can completely wrap the part of the insert located in the molding cavity.

[0010] In some embodiments, the pressing plate is provided with a plurality of second movable holes, the plurality of second movable holes correspond one-to-one to the plurality of first movable holes, and one end of the positioning pin facing away from the molding cavity extends into the second movable hole.

[0011] In the technical solution of the embodiment of the present application, one end of the positioning pin facing away from the molding cavity extends into the second movable hole. When the positioning pin is pushed by the fluid in the molding cavity to move away from the molding cavity, the end of the positioning pin facing away from the molding cavity enters the second movable hole until the protrusion contacts the pressure plate. The pressure plate restricts the positioning pin from continuing to move. When the positioning pin stops moving, the end of the positioning pin facing the molding cavity can be flush with the first molding surface (or the second molding surface) to block the connection between the first hole segment and the molding cavity, thereby reducing the risk of excess flash on the molded product.

[0012] In some embodiments, on the positioning needle, with the protrusion as a partition, the portion of the positioning needle facing the molding cavity is the first needle segment, and the portion of the positioning needle facing the pressure plate is the second needle segment, the first needle segment is at least partially located in the first hole segment, and the second needle segment is at least partially located in the second movable hole.

[0013] In the technical solution of the embodiment of the present application, the second needle segment is at least partially located in the second movable hole. When the protrusion contacts the step surface and the first needle segment abuts against the insert, the second needle segment is at least partially located in the second movable hole, thereby reducing the risk of the second needle segment detaching from the second movable hole, so that the second needle segment can remain in the second movable hole during the back and forth movement of the positioning needle.

[0014] In some embodiments, on the positioning needle, the diameter of the first needle segment is greater than the diameter of the second needle segment, and the inner wall of the second movable hole is slidably matched with the second needle segment.

[0015] In the technical solution of the embodiment of the present application, the inner wall of the second movable hole slidably cooperates with the second needle segment. On the one hand, the second movable hole limits the moving direction of the second needle segment, reducing the risk of the second needle segment deviating from the vertical direction; on the other hand, the second needle segment can better block the second movable hole.

[0016] In some embodiments, a slot is formed at one end of the positioning pin facing the molding cavity, and the slot is adapted to fit the insert.

[0017] In the technical solution of the embodiment of the present application, the extension direction of the slot of the positioning pin is parallel to the horizontal direction, and the slots of multiple positioning pins respectively clamp different parts of the insert. The slots can limit the movement of the insert in the horizontal plane in a direction perpendicular to the slots. The extension directions of the slots of multiple positioning pins can be perpendicular to each other, thereby limiting the movement of the slots in the horizontal direction and improving the positioning effect of the insert.

[0018] In some embodiments, the plurality of first active holes of the first mold unit correspond in position to the plurality of first active holes of the second mold unit.

[0019] In the technical solution of the embodiment of the present application, the positions of the multiple first active holes of the first mold unit and the multiple first active holes of the second mold unit correspond one by one, and any first active hole of the first mold unit and the first active hole of the second mold unit corresponding to its own position form a group, and the force applied to the insert by the positioning pins in each group of active holes can be applied to the same area of ​​the insert and thus offset each other, reducing the risk of shear force damaging the insert due to the misalignment of the forces applied to the insert by the positioning pins in the first active holes of the first mold unit and the positioning pins in the first active holes of the second mold unit.

[0020] In some embodiments, an insert is also included, and the inner wall of the molding cavity is provided with a positioning groove for fixing the insert, and the insert is used for the installation of the insert.

[0021] In the technical solution of the embodiment of the present application, part of the end of the metal insert in the electronic component needs to be exposed on the outside, and this part of the end can be inserted into the insert, so that the insert is suspended in the molding cavity.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a mold provided in some embodiments of the present application;

[0025] Figure 2 A top view of a mold provided for some embodiments of the present application;

[0026] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0027] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0028] Figure 5 A schematic structural diagram of a first mold unit provided in some embodiments of the present application;

[0029] Figure 6 A schematic diagram of the structure of the positioning pin and the insert provided in some embodiments of the present application;

[0030] Figure 7 A schematic diagram of the structure of a positioning pin provided in some embodiments of the present application.

[0031] Icons: 1-insert, 10-molded product, 2-first mold unit, 20-first molding surface, 3-second mold unit, 30-second molding surface, 4-first movable hole, 40-first hole segment, 41-second hole segment, 42-step surface, 5-positioning needle, 50-protrusion, 51-elastic part, 52-first needle segment, 53-second needle segment, 54-slot, 6-molding cavity, 7-pressure plate, 70-second movable hole, 8-insert. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0034] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0037] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0038] According to some embodiments of the present application, Figure 1 , Figure 3 , Figure 5-6 As shown, the present application provides a mold for in-mold injection molding of an insert 1, the mold includes a first mold unit 2, a second mold unit 3 and a positioning pin 5, the first mold unit 2 includes a first molding surface 20, the first molding surface 20 is provided with a plurality of first movable holes 4; the second mold unit 3 includes a second molding surface 30, the second molding surface 30 is provided with a plurality of first movable holes 4; the positioning pin 5 is slidably matched with the inner wall of the first movable hole 4; wherein the first molding surface 20 and the second molding surface 30 surround a molding cavity 6 for injection molding, the insert 1 is placed inside the molding cavity 6, and one end of the positioning pin 5 abuts against the insert 1.

[0039] The first mold unit 2 may be an upper mold (or a lower mold), and the second mold unit 3 may be a lower mold (or an upper mold).

[0040] The first mold unit 2 may be a concave mold, and the second mold unit 3 may be a concave mold or a convex mold; or, the first mold unit 2 may be a convex mold, and the second mold unit 3 may be a concave mold.

[0041] The number of the plurality of first active holes 4 on the first molding surface 20 may be three, four, five, six, seven, eight, nine, ten or more.

[0042] The number of the plurality of first movable holes 4 on the second molding surface 30 may be three, four, five, six, seven, eight, nine, ten or more.

[0043] The number of the plurality of first movable holes 4 on the first molding surface 20 is equal to the number of the plurality of first movable holes 4 on the second molding surface 30 .

[0044] The insert 1 mentioned in the present application may be, but is not limited to, a part made of metal or plastic.

[0045] The vertical direction mentioned in this application is the X direction in the figure. The first mold unit 2 and the second mold unit 3 are molded in the vertical direction, and the positioning pin 5 and the first movable hole 4 also extend in the vertical direction.

[0046] The mold provided in the embodiment of the present application can be applied to the production process of various products such as daily necessities housing, insulation products, electronic components, etc. The present application is described by taking electronic components as an example.

[0047] During use of the mold provided in the embodiment of the present application, the insert 1 is placed and suspended in the molding cavity 6, the first molding surface 20 and the second molding surface 30 are respectively located on opposite sides of the insert 1, the first molding surface 20 is provided with a plurality of first movable holes 4, the second molding surface 30 is provided with a plurality of first movable holes 4, a positioning pin 5 is provided in the first movable hole 4, the positioning pin 5 is slidably matched with the inner wall of the first movable hole 4, the positioning pin 5 slides along the movable hole until it abuts against the insert 1, the positioning pin 5 arranged in the first movable hole 4 of the first molding surface 20 and the positioning pin 5 arranged in the first movable hole 4 of the second molding surface 30 abut against the insert 1 from both sides in the vertical direction, thereby limiting the displacement of the insert 1 in the molding cavity 6, reducing the risk of scratching or colliding between the insert 1 and the first mold unit 2 or the second mold unit 3, and reducing the risk of deformation or damage of the insert 1, the mold and the molded product 10 caused by the displacement of the insert 1.

[0048] Alternatively, if Figure 3-4 As shown, the first movable hole 4 includes a first hole segment 40 and a second hole segment 41. The first hole segment 40 is closer to the molding cavity 6 than the second hole segment 41. The aperture of the first hole segment 40 is smaller than that of the second hole segment 41. A step surface 42 is formed between the first hole segment 40 and the second hole segment 41. The positioning pin 5 is provided with a protrusion 50. The protrusion 50 is arranged around the positioning pin 5. The protrusion 50 is located in the second hole segment 41 and contacts the step surface 42.

[0049] The positioning pin 5 can be slidably matched with the inner wall of the first hole section 40 .

[0050] The protrusion 50 may be slidably matched with the inner wall of the second hole section 41 ; or, there may be a gap between the protrusion 50 and the inner wall of the second hole section 41 .

[0051] The protrusion 50 extends from the outer circumferential surface of the positioning pin 5 in the radial direction of the positioning pin 5 .

[0052] The protrusion 50 is located in the second hole section 41. When the positioning pin 5 abuts against the insert 1, the protrusion 50 contacts the step surface 42. The step surface 42 limits the movement of the protrusion 50 toward the molding cavity 6, thereby limiting the upper limit of the force applied by the positioning member to the insert 1, reducing the risk of damage to the insert 1 due to excessive squeezing of the positioning pin 5.

[0053] Alternatively, if Figure 1 to Figure 4 As shown, a pressing plate 7 is provided on the side of the first mold unit 2 and the second mold unit 3 facing away from the molding cavity 6, and the positioning pin 5 is also sleeved with an elastic member 51, and the two ends of the elastic member 51 are respectively in contact with the protrusion 50 and the pressing plate 7.

[0054] The two pressing plates 7 may be in contact with the first mold unit 2 and the second mold unit 3 , respectively.

[0055] The elastic member 51 may be, but is not limited to, a spring.

[0056] The pressure plate 7 can close the opening of the second hole section 41 extending to the surface of the first mold unit 2 (or the second mold unit 3). The two ends of the elastic member 51 are respectively abutted against the protrusion 50 and the pressure plate 7. The positioning pin 5 can move toward the insert 1 under the push of the elastic force provided by the elastic member 51 until it abuts against the insert 1. When the injection molding is nearly completed, the fluid in the molding cavity 6 will apply a force opposite to the elastic force of the elastic member 51 to the positioning pin 5. When the force applied by the fluid in the molding cavity 6 to the positioning pin 5 is greater than the elastic force of the elastic member 51, the elastic member 51 is compressed by the force applied by the fluid in the molding cavity 6 to the positioning pin 5. The positioning pin 5 moves away from the molding cavity 6 along the first hole section 40 under the push of the fluid force. The fluid can thereby fill the internal space of the molding cavity 6 occupied by the positioning pin 5, so that the molded plastic material can completely wrap the part of the insert 1 located in the molding cavity 6.

[0057] Alternatively, if Figure 3-4 As shown, the pressing plate 7 is provided with a plurality of second movable holes 70 , which correspond one-to-one to the plurality of first movable holes 4 , and one end of the positioning pin 5 away from the molding cavity 6 extends into the second movable hole 70 .

[0058] The size of the second movable hole 70 in the vertical direction can be equal to the size of the part of the positioning pin 5 between the end of the positioning pin 5 away from the molding cavity 6 and the protrusion; or, the size of the second movable hole 70 in the vertical direction can be larger than the size of the part of the positioning pin 5 between the end of the positioning pin 5 away from the molding cavity 6 and the protrusion.

[0059] The end of the positioning pin 5 facing away from the molding cavity 6 extends into the second movable hole 70. When the positioning pin 5 is pushed by the fluid in the molding cavity 6 to move away from the molding cavity 6, the end of the positioning pin 5 facing away from the molding cavity 6 enters the second movable hole 70 until the protrusion 50 contacts the pressure plate 7. The pressure plate 7 restricts the positioning pin 5 from continuing to move. When the positioning pin 5 stops moving, the end of the positioning pin 5 facing the molding cavity 6 can be flush with the first molding surface 20 (or the second molding surface 30) to block the connection between the first hole section 40 and the molding cavity 6, thereby reducing the risk of excess flash in the molded product 10.

[0060] Alternatively, if Figure 3-4 , Figure 6-7 As shown, on the positioning needle 5, with the protrusion 50 as the dividing point, the part of the positioning needle 5 facing the molding cavity 6 is the first needle segment 52, and the part of the positioning needle 5 facing the pressing plate 7 is the second needle segment 53. The first needle segment 52 is at least partially located in the first hole segment 40, and the second needle segment 53 is at least partially located in the second movable hole 70.

[0061] The second needle segment 53 is at least partially located in the second movable hole 70. When the protrusion 50 contacts the step surface 42 and the first needle segment 52 abuts against the insert 1, the second needle segment 53 is at least partially located in the second movable hole 70, reducing the risk of the second needle segment 53 escaping from the second movable hole 70, so that the second needle segment 53 can remain in the second movable hole 70 during the back and forth movement of the positioning needle 5.

[0062] Alternatively, if Figure 3-4 As shown, on the positioning needle 5 , the diameter of the first needle segment 52 is greater than the diameter of the second needle segment 53 , and the inner wall of the second movable hole 70 is slidably matched with the second needle segment 53 .

[0063] The inner wall of the second movable hole 70 slidably cooperates with the second needle segment 53. On the one hand, the second movable hole 70 limits the moving direction of the second needle segment 53 and reduces the risk of the second needle segment 53 deviating from the vertical direction; on the other hand, the second needle segment 53 can better block the second movable hole 70.

[0064] Alternatively, if Figure 6-7 As shown, a slot 54 is formed at one end of the positioning pin 5 facing the molding cavity 6 , and the slot 54 is adapted to fit the insert 1 .

[0065] The edge of the insert 1 can be inserted into the groove 54 of the positioning pin 5 .

[0066] The horizontal plane mentioned in this application is a plane perpendicular to the vertical plane.

[0067] The horizontal direction mentioned in this application includes multiple directions perpendicular to the vertical direction, and the horizontal direction is located in or parallel to the horizontal plane.

[0068] The extending direction of the slot 54 of the positioning pin 5 is parallel to the horizontal direction. The slots 54 of multiple positioning pins 5 respectively clamp different parts of the insert 1. The slot 54 can limit the movement of the insert 1 in the horizontal plane in a direction perpendicular to the slot 54. The extending directions of the slots 54 of multiple positioning pins 5 can be perpendicular to each other, thereby limiting the movement of the slot 54 in the horizontal direction and improving the positioning effect of the insert 1.

[0069] Alternatively, if Figure 3 and Figure 6 As shown, the positions of the multiple first movable holes 4 of the first mold unit 2 and the multiple first movable holes 4 of the second mold unit 3 correspond.

[0070] The positions of the multiple first movable holes 4 of the first mold unit 2 and the multiple first movable holes 4 of the second mold unit 3 correspond one to one, and any first movable hole 4 of the first mold unit 2 is grouped with the first movable hole 4 of the second mold unit 3 corresponding to its own position. The force applied to the insert 1 by the positioning pins 5 in each group of movable holes can be applied to the same area of ​​the insert 1 and thus offset each other, reducing the risk of shear force damaging the insert 1 due to the misalignment of the forces applied to the insert 1 by the positioning pins 5 in the first movable holes 4 of the first mold unit 2 and the positioning pins 5 in the first movable holes 4 of the second mold unit 3.

[0071] Alternatively, if Figure 6-7 As shown, it also includes an insert 8 , and the inner wall of the molding cavity 6 is provided with a positioning groove for fixing the insert 8 , and the insert 8 is used for installing the insert 1 .

[0072] Part of the end of the metal insert 1 in the electronic component needs to be exposed outside, and this part of the end can be inserted into the insert 8, so that the insert 1 is suspended in the molding cavity 6.

[0073] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A mold for insert in-mold injection molding, It is characterized in that include: A first mold unit, comprising a first molding surface, wherein the first molding surface is provided with a plurality of first movable holes; A second mold unit, comprising a second molding surface, wherein the second molding surface is provided with a plurality of the first movable holes; A positioning pin, slidably matched with the inner wall of the first movable hole; The first molding surface and the second molding surface form a molding cavity for injection molding, an insert is placed inside the molding cavity, and one end of the positioning pin abuts against the insert.

2. The mold according to claim 1, It is characterized in that The first movable hole includes a first hole segment and a second hole segment. The first hole segment is closer to the forming cavity than the second hole segment. The hole diameter of the first hole segment is smaller than that of the second hole segment. A step surface is formed between the first hole segment and the second hole segment. The positioning pin is provided with a protrusion, which is arranged around the positioning pin. The protrusion is located in the second hole segment and contacts the step surface.

3. The mold according to claim 2, It is characterized in that A pressing plate is provided on the side of the first mold unit and the second mold unit facing away from the molding cavity. The positioning pin is also sleeved with an elastic member, and two ends of the elastic member are respectively in contact with the protrusion and the pressing plate.

4. The mold according to claim 3, It is characterized in that The pressing plate is provided with a plurality of second movable holes, the plurality of second movable holes correspond to the plurality of first movable holes one by one, and one end of the positioning pin away from the molding cavity extends into the second movable hole.

5. The mold according to claim 4, It is characterized in that On the positioning needle, with the protrusion as a dividing point, the part of the positioning needle facing the molding cavity is the first needle segment, and the part of the positioning needle facing the pressing plate is the second needle segment, the first needle segment is at least partially located in the first hole segment, and the second needle segment is at least partially located in the second movable hole.

6. The mold according to claim 5, It is characterized in that On the positioning needle, the diameter of the first needle segment is greater than the diameter of the second needle segment, and the inner wall of the second movable hole is slidably matched with the second needle segment.

7. The mold according to claim 1, It is characterized in that A slot is formed at one end of the positioning pin facing the molding cavity, and the slot is adapted to the insert.

8. The mold according to claim 1, It is characterized in that The plurality of first movable holes of the first mold unit correspond in position to the plurality of first movable holes of the second mold unit.

9. The mold according to claim 1, It is characterized in that It also includes an insert, and the inner wall of the molding cavity is provided with a positioning groove for fixing the insert, and the insert is used for the installation of the insert.

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