Injection mold

Abstract

The utility model relates to the technical field of injection molding machining, in particular to an injection mold. The injection mold comprises a male mold assembly and a female mold assembly which are matched in a mold closing mode, the male mold assembly comprises a male mold plate and a male mold insert core, and the female mold assembly comprises a female mold plate and a female mold insert core; the outer positioning assembly comprises outer side inserts and a plurality of inclined guide columns, and the inclined guide columns are used for driving the corresponding outer side inserts to abut against the outer side faces of the side walls; the inner positioning assembly comprises a driving plate, at least one first pushing piece and at least one inner insert core, one end of the first pushing piece is connected to the driving plate, the other end of the first pushing piece is inserted into the male mold insert core, the inner insert core is slidably connected to the male mold insert core, the inner insert core is in slope connection with the first pushing piece, and the driving plate is used for driving the first pushing piece to move; and the inner insert is pushed or pulled to abut against or be far away from the inner opening of the hole to be subjected to injection molding. The injection mold can support and position the to-be-injection-molded hole of the workpiece in multiple directions, so that the injection molding precision is improved, the machining steps are reduced, the production cost is reduced, and the machining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding processing, in particular to an injection mold. BACKGROUND

[0002] Insert molding is a process of putting a pre-prepared metal or other material of different materials into the mold, then injecting molten plastic, and after opening the mold, the insert is tightly buried in the plastic by the cooled and solidified plastic, forming a complex and delicate integrated part or product with inserts such as threads, electrodes, etc. The insert molding process has obvious advantages, which can improve product performance, enhance design flexibility, reduce production cost and improve production efficiency. At present, mobile phones and other electronic products often use metal frames, back shells, etc. In order to improve the signal strength, an antenna is often arranged on the metal frame, back shell and other structures. When processing, a to-be-injection-molded hole is first formed on the metal frame, back shell and other structures, and then injection molding is performed in the to-be-injection-molded hole. Since the frame, back shell and other structures are relatively thin, excess structures often need to be injection molded to support the required part in the to-be-injection-molded hole, and then the excess part is milled in the subsequent processing process, which is high in production cost, multiple in processing steps and low in processing efficiency. CONTENT OF THE UTILITY MODEL

[0003] In view of the above, it is necessary to provide an injection mold which can support and position the to-be-injection-molded hole of the workpiece in multiple directions, so as to improve the injection precision, reduce the processing steps, reduce the production cost, and improve the processing efficiency.

[0004] The embodiment of the present application provides an injection mold for injection molding a side wall of a workpiece, the side wall of the workpiece is provided with at least one to-be-injection-molded hole, and the injection mold comprises: a male mold assembly and a female mold assembly matched in mold closing, the male mold assembly comprises a male mold plate and a male mold insert connected to the male mold plate, the female mold assembly comprises a female mold plate and a female mold insert, the male mold insert is used for bearing the workpiece, the female mold insert is used for pressing the side wall, and the female mold insert is provided with an injection hole communicated with the to-be-injection-molded hole; an outer positioning assembly, comprising an outer side insert connected to the male mold plate and a plurality of inclined guide columns each connected to the female mold plate, the outer side insert is arranged around the male mold insert, the outer side insert is provided with a guide hole matched with the inclined guide column, and a plurality of inclined guide columns and a plurality of guide holes are arranged one by one, each inclined guide column is used for being inserted into the corresponding guide hole to drive the corresponding outer side insert to move towards the male mold insert during mold closing, so that the outer side insert abuts against the outer opening of the to-be-injection-molded hole; and an inner positioning assembly, comprising a driving plate, at least one first pushing piece and at least one inner insert, the driving plate is arranged below the male mold plate, one end of the first pushing piece is connected to the driving plate, and the other end is movably inserted into the male mold insert, the inner insert is slidably connected to the male mold insert in the horizontal direction and is arranged correspondingly to the to-be-injection-molded hole, the inner insert corresponds to the first pushing piece, and the inner insert is connected to the first pushing piece at an inclined surface, and the driving plate is used for driving the first pushing piece to move towards or away from the male mold insert under the action of an external force, the first pushing piece pushes or pulls the inner insert to move towards or away from the corresponding side wall, so that the inner insert abuts against or is away from the inner opening of the to-be-injection-molded hole.

[0005] The injection mold is provided with the male mold assembly and the female mold assembly matched in mold closing, the workpiece is supported by the male mold insert, and the workpiece is pressed by the female mold insert. During mold closing, the inclined guide column connected to the female mold plate is inserted into the guide hole of the outer side insert, and then the outer side insert is driven to abut against the outer side of the side wall of the workpiece. The driving plate of the inner positioning assembly drives a plurality of first pushing pieces to move towards the male mold insert, and the plurality of first pushing pieces respectively push the corresponding inner inserts to move towards the side wall of the workpiece, and then abut against the inner side of the side wall. In this way, the male mold insert, the female mold insert, the outer side insert and the inner insert can hold the side wall of the workpiece from the upper, lower, left and right four directions, the female mold insert is provided with a plurality of injection holes communicated with the to-be-injection-molded hole, and the to-be-injection-molded hole is convenient for injection molding. The injection mold can support and position the to-be-injection-molded hole of the workpiece in multiple directions, improve the injection precision, and can be molded at one time during injection, without subsequent finishing, reduce the processing steps, and be beneficial to reducing the production cost and improving the processing efficiency.

[0006] In some embodiments, the outer positioning assembly further comprises a diaphragm arranged on the side of the outer insert facing the workpiece and corresponding to the outer opening of the to-be-injection-molded hole.

[0007] In some embodiments, the inner positioning assembly further comprises a second pushing member and two positioning inserts, one end of the second pushing member is connected to the driving plate, the other end is movably inserted into the male mold insert, the two positioning inserts are slidably connected to the male mold insert in the horizontal direction and are arranged in the horizontal direction, and are symmetrically arranged on the opposite sides of the second pushing member and are connected to the inclined surface of the second pushing member, the driving plate drives the second pushing member to move towards or away from the male mold insert, the second pushing member pushes or pulls the two positioning inserts to move in opposite directions to move towards or away from the corresponding two side walls, so that the two positioning inserts abut or move away from the inner side of the two side walls, respectively.

[0008] In some embodiments, the inner insert is provided with a sliding protrusion extending in the horizontal direction, and the male mold insert is provided with a plurality of sliding grooves, each sliding protrusion is correspondingly and slidably arranged in one sliding groove, and each inner insert is slidably connected to the male mold insert through the cooperation of the sliding protrusion and the sliding groove.

[0009] In some embodiments, the side of the inner insert abutting the corresponding first pushing member is provided with a dovetail groove, the first pushing member is provided with a dovetail protrusion matched with the corresponding dovetail groove, the dovetail protrusion is slidably arranged in the corresponding dovetail groove, so that when the first pushing member moves close to or away from the male mold insert, the corresponding inner insert is pushed or pulled towards or away from the corresponding side wall through the cooperation of the dovetail protrusion and the dovetail groove.

[0010] In some embodiments, the positioning insert comprises a protruding portion extending in the horizontal direction, and the male mold insert is provided with a plurality of sliding grooves, each protruding portion is correspondingly and slidably arranged in one sliding groove, and the positioning insert is slidably connected to the male mold insert through the cooperation of the protruding portion and the sliding groove.

[0011] In some embodiments, the side of the positioning insert opposite to the second pushing member is provided with a connecting groove, and the opposite sides of the second pushing member and the two positioning inserts are provided with connecting protrusions matched with the connecting groove, the connecting protrusions are slidably arranged in the corresponding connecting grooves, so that when the second pushing member moves close to or away from the male mold insert, the corresponding positioning insert is pushed or pulled towards or away from the corresponding side wall through the cooperation of the connecting protrusions and the connecting grooves.

[0012] In some embodiments, the outer positioning assembly further comprises: outer forming blocks, which are detachably connected with the outer inserts and arranged on the side of the outer inserts facing the workpiece, each of the outer forming blocks being arranged corresponding to the outer opening of one of the injection holes.

[0013] In some embodiments, the diaphragm is arranged on the side of the outer forming blocks facing the injection holes.

[0014] In some embodiments, the inner positioning assembly further comprises: inner forming blocks, which are detachably connected with the inner inserts and arranged on the side of the inner inserts facing the injection holes, each of the inner forming blocks being arranged corresponding to the inner opening of one of the injection holes. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A structural schematic diagram of the injection mold is provided for the embodiments of the present application.

[0016] Figure 2 A structural schematic diagram of the injection mold is provided for the embodiments of the present application. Figure 1 A structural schematic diagram of the injection mold is provided for the embodiments of the present application.

[0017] Figure 3 A structural schematic diagram of the injection mold is provided for the embodiments of the present application. Figure 2 A structural schematic diagram of the injection mold is provided for the embodiments of the present application.

[0018] Figure 4 A structural schematic diagram of the injection mold is provided for the embodiments of the present application. Figure 1 A structural schematic diagram of the injection mold is provided for the embodiments of the present application.

[0019] Figure 5 A structural schematic diagram of the injection mold is provided for the embodiments of the present application. Figure 1 A structural schematic diagram of the injection mold is provided for the embodiments of the present application.

[0020] Main element symbol explanation: injection mold 100, male mold assembly 10, male mold plate 11, male mold insert 12, sliding groove 121, sliding slot 122, forming part 123, support part 124, female mold assembly 20, female mold plate 21, female mold insert 22, injection hole 23, outer positioning assembly 30, outer insert 31, guide hole 311, inclined guide column 32, diaphragm 33, outer forming block 34, inner positioning assembly 40, driving plate 41, first pushing member 42, dovetail protrusion 421, inner insert 43, sliding protrusion 431, dovetail groove 432, second pushing member 44, connecting protrusion 441, positioning insert 45, protrusion part 451, connecting groove 452, inner forming block 46, workpiece 200, side wall 201, injection hole 202. DETAILED DESCRIPTION

[0021] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation on the present application.

[0022] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, which is only for the purpose of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be broadly understood, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other, it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0024] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0025] Please refer to Figure 1 and Figure 2 The embodiments of the present application provide an injection mold 100 for injection molding the side wall 201 of the workpiece 200, the side wall 201 of the workpiece 200 is provided with at least one to-be-injection-molded hole 202, the to-be-injection-molded hole 202 can be through or blind, and the shape of the to-be-injection-molded hole 202 can be circular or square. The workpiece 200 can be a metal back shell or a metal middle frame of an electronic product, and the electronic product can be a mobile phone, a tablet computer or a watch. It can be understood that the side wall 201 of the workpiece 200 is provided with four, and the to-be-injection-molded hole 202 on the side wall 201 can be provided with one, two, three, four, six or the like, and the specific number and position of the to-be-injection-molded hole 202 can be set according to actual needs, which is not limited herein. The injection mold 100 comprises a male mold assembly 10, a female mold assembly 20, an outer positioning assembly 30 and an inner positioning assembly 40.

[0026] Specifically, referring to Figure 1 , Figure 2 and Figure 3 , the mold assembly 10 and the mold assembly 20 are matched, the mold assembly 10 includes a male mold plate 11 and a male mold insert 12 connected to the male mold plate 11, the mold assembly 20 includes a female mold plate 21 and a female mold insert 22, the male mold insert 12 is used to carry the workpiece 200, the female mold insert 22 is used to press the side wall 201, and the female mold insert 22 is provided with an injection hole 23 communicated with the to-be-injected hole 202. It can be understood that the female mold plate 21 can also be provided with an injection hole 23, that is, the injection hole 23 penetrates the female mold plate 21 and the female mold insert 22.

[0027] Please refer to Figure 4 , the outer positioning assembly 30 includes an outer insert 31 connected to the male mold plate 11 and a plurality of inclined guide columns 32 connected to the female mold plate 21, the outer insert 31 is arranged around the male mold insert 12, the outer insert 31 is provided with a guide hole 311 matched with the inclined guide column 32, and the plurality of inclined guide columns 32 and the plurality of guide holes 311 are arranged one by one. Each inclined guide column 32 is used to insert into the corresponding guide hole 311 to drive the corresponding outer insert 31 to move towards the male mold insert 12 when the mold is closed, so that the outer insert 31 abuts against the outer opening of the to-be-injected hole 202 on the side wall 201.

[0028] The number of outer inserts 31 is at least one, for the convenience of understanding, the embodiment is described with multiple outer inserts 31. Each outer insert 31 corresponds to one side wall 201 of the workpiece 200. When the to-be-injected hole 202 is arranged on each of the four side walls 201 of the workpiece 200, the outer insert 31 is provided with four, respectively corresponding to the four side walls 201. When the to-be-injected hole 202 is arranged on one, two or three side walls 201 of the workpiece 200, the outer insert 31 can be provided with only one, two or three. Of course, in order to improve the stability of positioning the workpiece 200, no matter where the to-be-injected hole 202 on the workpiece 200 is arranged, the outer insert 31 can be provided with four to abut and position the workpiece 200 from all around. Each outer insert 31 is provided with at least one guide hole 311, the number and position of the inclined guide columns 32 connected to the female mold plate 21 correspond to the guide holes 311 one by one, each guide hole 311 gradually approaches the male mold insert 12 in the direction of the female mold plate 21 pointing to the male mold plate 11, and the extension direction of each inclined guide column 32 is the same as that of the corresponding guide hole 311. When the mold is closed, each inclined guide column 32 is inserted into the corresponding guide hole 311, thereby driving the outer insert 31 to move towards the workpiece 200 on the male mold insert 12 when the female mold plate 21 approaches the male mold plate 11, until the outer insert 31 abuts against the outer side of the side wall 201.

[0029] Please refer toFigure 5 The inner positioning assembly 40 comprises a driving plate 41, at least one first pushing piece 42, and at least one inner insertion piece 43. The driving plate 41 is arranged below the male mold plate 11. The number of the first pushing pieces 42 and the inner insertion pieces 43 is at least one. For the convenience of understanding, the number of the first pushing pieces 42 and the inner insertion pieces 43 is multiple in the embodiment. One end of each first pushing piece 42 is connected to the driving plate 41, and the other end is movably inserted into the male mold insertion piece 12. The multiple inner insertion pieces 43 are slidably connected to the male mold insertion piece 12 in the horizontal direction and correspond to the to-be-injection-molded hole 202. The multiple inner insertion pieces 43 correspond to the multiple first pushing pieces 42 one by one, and each inner insertion piece 43 is connected to the corresponding first pushing piece 42 at an inclined surface. The driving plate 41 is used to drive the first pushing piece 42 to move towards or away from the male mold insertion piece 12 under the action of an external force. The first pushing piece 42 pushes or pulls the corresponding inner insertion piece 43 to move towards or away from the corresponding side wall 201, so that the inner insertion piece 43 abuts or is away from the inner opening of the to-be-injection-molded hole 202 on the inner side of the side wall 201.

[0030] The driving plate 41 is in a plate shape and is connected with an external driving device (not shown in the figure), which can be a driving device such as a cylinder. The first pushing member 42 is in a rod shape and is provided with an inclined surface at one end corresponding to the inner entering member 43. The inner entering member 43 is in a special shape and is adapted to the structure of the side wall 201 of the workpiece 200. It can be understood that the male mold plate 11 and the male mold entering member 12 are provided with holes for accommodating the first pushing member 42 and the inner entering member 43. The number and position of the inner entering member 43 correspond to the number and position of the to-be-injection holes 202 of the workpiece 200, and the number and position of the first pushing member 42 correspond to the number and position of the inner entering member 43 one by one. It can be understood that each inner entering member 43 can correspond to one to-be-injection hole 202, and when the distance between two adjacent to-be-injection holes 202 is relatively small, one inner entering member 43 can also correspond to two or more to-be-injection holes 202. In the embodiment, the inner entering member 43 is provided with four, and the four inner entering members 43 correspond to the four inner corners of the workpiece 200 respectively. The first pushing member 42 is provided with four, and the four first pushing members 42 are arranged on the side away from the side wall 201 of the corresponding inner entering member 43. After the male mold assembly 10 and the female mold assembly 20 are closed, the driving plate 41 moves towards the male mold plate 11 under the action of an external force, the driving plate 41 drives the first pushing member 42 to move towards the male mold entering member 12, and then pushes the inner entering member 43 towards the side wall 201 of the workpiece 200, so that the inner entering member 43 abuts against the inner opening of the to-be-injection hole 202 on the inner side of the side wall 201. In this way, the side wall 201 can be clamped and positioned from the upper, lower, left and right four directions of the side wall 201 to block the inner opening of the to-be-injection hole 202, thereby improving the stability of the workpiece 200. Moreover, the outer entering member 31 and the inner entering member 43 correspond to the to-be-injection hole 202, and then cooperate with the male mold entering member 12, the female mold entering member 22 and the workpiece 200 to form a molding cavity at the position of the to-be-injection hole 202, so that the workpiece 200 can be molded at one time during injection molding, without the need for subsequent processing steps, thereby improving the work efficiency.

[0031] The injection mold 100 provided by the embodiment of the present application is provided with a mold closing matched male mold assembly 10 and female mold assembly 20. The male mold pin 12 can support the workpiece 200, and the female mold pin 22 can press hold the workpiece 200. When the mold is closed, the inclined guide pillar 32 connected to the female mold plate 21 can be inserted into the guide hole 311 of the outer pin 31, and then drive the outer pin 31 to abut against the outer side of the side wall 201 of the workpiece 200. The driving plate 41 of the inner positioning assembly 40 can drive a plurality of first pushing pieces 42 to move towards the male mold pin 12, and the plurality of first pushing pieces 42 respectively push the corresponding inner pin 43 towards the side wall 201 of the workpiece 200, and then abut against the inner side of the side wall 201. In this way, the male mold pin 12, the female mold pin 22, the outer pin 31 and the inner pin 43 can hold the side wall 201 of the workpiece 200 from the upper, lower, left and right four directions of the side wall 201, and the female mold pin 22 is provided with a plurality of injection holes 23 which are in communication with the to-be-injected holes 202, so as to facilitate the injection of the to-be-injected holes 202. The injection mold 100 provided by the embodiment of the present application can support and position the to-be-injected holes 202 of the workpiece 200 in multiple directions, improve the injection precision, and can be molded at one time during injection, without subsequent finishing, thereby reducing the processing steps, being conducive to reducing the production cost, and having high processing efficiency.

[0032] In some embodiments, referring to Figure 2 , the outer positioning assembly 30 further comprises a diaphragm 33. The number of the diaphragm 33 can be one or multiple. Each diaphragm 33 is arranged on the side of each outer pin 31 facing the workpiece 200 and corresponds to the outer opening 202 of the to-be-injected hole, so as to block the outer opening 202 of the to-be-injected hole, thereby facilitating the injection. The material of the diaphragm 33 can be resin or the like. The diaphragm 33 is made of high-temperature-resistant material. In the embodiment, the diaphragm 33 can be a 3M flexible protective film with a thickness of 0.1 mm and a high-temperature resistance of 400℃. The diaphragm 33 can be formed on the outer pin 31 by pasting or coating. During the injection process, the injection material is injected into the to-be-injected hole 202 of the workpiece 200 through the injection hole 23 on the female mold pin 22. The diaphragm 33 is arranged on the side of the outer pin 31 facing the workpiece 200 and corresponds to the to-be-injected hole 202, so as to facilitate the separation of the outer pin 31 and the workpiece 200 when the mold is opened. By arranging the diaphragm 33, it is also conducive to improving the smoothness of the surface of the molded part after injection molding, and reducing the subsequent finishing process which may be needed.

[0033] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3The inner positioning assembly 40 further comprises a second pushing piece 44 and two positioning inserts 45. One end of the second pushing piece 44 is connected to the driving plate 41, and the other end is movably inserted into the male mold insert 12. The two positioning inserts 45 are slidably connected to the male mold insert 12 in the horizontal direction and are arranged symmetrically on the opposite sides of the second pushing piece 44 and connected to the inclined surface of the second pushing piece 44. The driving plate 41 drives the second pushing piece 44 to move towards or away from the male mold insert 12, and the second pushing piece 44 pushes or pulls the two positioning inserts 45 to move oppositely to move towards or away from the corresponding two side walls 201, respectively, so that the two positioning inserts 45 abut or move away from the inner side surfaces of the two side walls 201, respectively.

[0034] The second pushing piece 44 can be in a rod or column structure, and the corresponding end of the second pushing piece 44 is provided with two inclined surfaces. The positioning insert 45 can be in a special-shaped structure, and the corresponding side of the positioning insert 45 is provided with a corresponding inclined surface. The side of the positioning insert 45 opposite to the side wall 201 of the workpiece 200 is adapted to the structure of the side wall 201. It can be understood that the inner insert 43 can cooperate with the outer side insert 31 to clamp and position the position of the workpiece 200 having the to-be-injection-molded hole 202, but the positioning stability of the side wall 201 of the workpiece 200 without the to-be-injection-molded hole 202 is weak. By arranging the positioning insert 45, the side wall 201 of the workpiece 200 can be positioned in cooperation with the outer side insert 31, and the stability of the positioning of the workpiece 200 is further improved. The two positioning inserts 45 are symmetrically arranged on the opposite sides of the second pushing piece 44 and connected to the inclined surface of the second pushing piece 44. When the driving plate 41 drives the second pushing piece 44 to move, the two positioning inserts 45 can be simultaneously pushed to move towards the corresponding side walls 201 in opposite directions. This symmetrical structure can position the inner side surfaces of the side walls 201 of the workpiece 200 from two directions, effectively avoid the workpiece 200 from being deviated or tilted in the injection mold 100 due to uneven unilateral positioning force, so that the workpiece 200 can be more stably and accurately positioned during the injection molding process, and the consistency of the quality of the injection-molded product is improved.

[0035] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , the inner insert 43 is provided with a sliding protrusion 431 extending in the horizontal direction. Please refer to Figure 5The male mold insert 12 is provided with a plurality of sliding grooves 121, each sliding protrusion 431 is slidingly arranged in one sliding groove 121, and each inner insert 43 is slidingly connected with the male mold insert 12 through the cooperation of the sliding protrusion 431 and the sliding groove 121. In order to facilitate processing, the male mold insert 12 can be composed of a forming part 123 and a supporting part 124, the forming part 123 is used to bear the workpiece 200, and the supporting part 124 is arranged on the lower side of the forming part 123. The supporting part 124 can be provided with a plurality of, such as four, six, etc., and the sliding groove 121 is formed between the forming part 123 and the supporting part 124. The sliding protrusion 431 on each inner insert 43 can be arranged on the side of the inner insert 43 away from the first pusher 42, and the position opposite to each inner insert 43 of the male mold insert 12 is provided with a corresponding sliding groove 121. The cooperation of the sliding protrusion 431 and the sliding groove 121 provides an accurate horizontal sliding path for the inner insert 43. When the driving plate 41 drives the inner insert 43 to move towards or away from the side wall 201 through the first pusher 42, the inner insert 43 can only slide in the predetermined horizontal direction, avoiding the inclination or shaking of the inner insert 43 during movement, and ensuring that the inner insert 43 can accurately abut or move away from the inner side of the side wall 201, thereby improving the positioning accuracy of the inner side of the side wall 201 of the workpiece 200. This structure makes the movement trajectory of the inner insert 43 fixed and repeatable during each opening and closing process of the injection mold 100. No matter how many injection cycles are passed, the inner insert 43 can move on the same path, ensuring that the positioning effect of the inner insert 43 on the inner side of the side wall 201 of the workpiece 200 has high consistency during the injection process of different batches of workpieces 200, which helps to improve the quality stability of the injection product.

[0036] In some embodiments, referring to Figure 2 , Figure 3 and Figure 5 , the side of the inner insert 43 abutting against the corresponding first pusher 42 is provided with a dovetail groove 432, the first pusher 42 is provided with a dovetail protrusion 421 matched with the corresponding dovetail groove 432, and the dovetail protrusion 421 is slidingly arranged in the corresponding dovetail groove 432. When the first pusher 42 moves close to or away from the male mold insert 12, the corresponding inner insert 43 is driven to move towards or away from the corresponding side wall 201 through the cooperation of the dovetail protrusion 421 and the dovetail groove 432. The cooperation structure of the dovetail groove 432 and the dovetail protrusion 421 provides an accurate movement transmission mode between the first pusher 42 and the inner insert 43, so that the first pusher 42 can only push or pull the inner insert 43 in a specific direction when moving, ensuring the accuracy of the movement of the inner insert 43 towards or away from the side wall 201 in the horizontal direction.

[0037] In some embodiments, referring to Figure 1 , Figure 3 andFigure 4 The positioning insert 45 comprises a protrusion 451 extending in the horizontal direction, and the male mold insert 12 is provided with a plurality of sliding grooves 122, each protrusion 451 is slidingly arranged in a corresponding sliding groove 122, and the positioning insert 45 is slidingly connected with the male mold insert 12 through the cooperation of the protrusion 451 and the sliding groove 122. It can be understood that, for the convenience of processing, the sliding grooves 122 can be arranged in the support portion 124, and each positioning insert 45 is symmetrically provided with two protrusions 451, and the support portion 124 is provided with two corresponding sliding grooves 122 at positions opposite to each positioning insert 45. The cooperation of the protrusion 451 and the sliding groove 122 provides a clear sliding path for the positioning insert 45. When the driving plate 41 drives the second pushing piece 44 to move, and in turn drives the positioning insert 45 to move towards or away from the corresponding side wall 201, the positioning insert 45 can only slide in the horizontal direction determined by the sliding groove 122. Please see Figure 2 This precise movement ensures that the positioning insert 45 can accurately abut or move away from the inner side surface of the side wall 201 of the workpiece 200, avoiding the situation that the positioning insert 45 deviates or shakes during movement, thereby improving the positioning accuracy of the inner side surface of the side wall 201 of the workpiece 200, and helping to ensure the quality stability of the injection molded product.

[0038] In some embodiments, please see Figure 2 , Figure 3 and Figure 5 The side of the positioning insert 45 opposite to the second pushing piece 44 is provided with a connecting groove 452, and the two sides of the second pushing piece 44 opposite to the two positioning inserts 45 are provided with connecting protrusions 441 matched with the connecting grooves 452, and the connecting protrusions 441 are slidingly arranged in the corresponding connecting grooves 452, so that when the second pushing piece 44 moves close to or away from the male mold insert 12, the corresponding positioning insert 45 is pushed or pulled towards or away from the corresponding side wall 201 through the cooperation of the connecting protrusions 441 and the connecting grooves 452. The cross section of the connecting groove 452 is approximately T-shaped, and the cross section of the connecting protrusion 441 is approximately T-shaped, and the structural design of the connecting groove 452 and the connecting protrusion 441 ensures the accuracy of the movement direction between the second pushing piece 44 and the positioning insert 45. When the second pushing piece 44 moves, the connecting protrusion 441 can only slide in a specific direction in the connecting groove 452. This limitation enables the positioning insert 45 to move strictly according to the predetermined direction, effectively avoiding the deviation of the movement direction of the positioning insert 45, thereby ensuring the accuracy of the positioning of the workpiece 200 during injection molding, and helping to improve the quality of the injection molded product.

[0039] In some embodiments, please see Figure 2 and Figure 3The outer positioning assembly 30 further comprises outer forming blocks 34, which are detachably connected with the outer side sprue 31 and arranged on the side of the outer side sprue 31 facing the workpiece 200. Each outer forming block 34 is arranged corresponding to one to-be-injection-molded hole 202. The outer side sprue 31 can block the outer opening of the to-be-injection-molded hole 202 through the outer forming block 34, so as to injection mold. In this way, for to-be-injection-molded holes 202 of different shapes of the workpiece 200, the outer forming blocks 34 matched with the to-be-injection-molded holes 202 can be conveniently replaced. For example, when the to-be-injection-molded holes 202 of the sidewall 201 of the workpiece 200 are arc-shaped, trapezoidal or other special shapes, the outer forming blocks 34 with corresponding shapes can be replaced, so that the mold can flexibly adapt to injection molding requirements of various shapes, expand the application range of the mold, and there is no need to specially design a complete set of mold for each different shape of the workpiece 200. During the injection molding process, the outer forming blocks 34 may be damaged due to factors such as frequent contact with injection molding materials, injection molding pressure or friction during demolding. Since the outer forming blocks 34 are detachably connected with the outer side sprue 31, when the outer forming blocks 34 are damaged, they can be conveniently and quickly detached and replaced, without the need to perform large-scale maintenance or replacement on the entire outer side sprue 31 or the injection mold 100, thereby reducing maintenance cost and time and improving the maintenance efficiency of the mold.

[0040] In some embodiments, referring to Figure 2 The diaphragm 33 is arranged on the side of the outer forming block 34 facing the to-be-injection-molded hole 202. In this way, the use amount of the diaphragm 33 can be reduced, which is conducive to reducing production cost. Since the outer forming block 34 is detachably connected with the outer side sprue 31, the diaphragm 33 connected with the outer forming block 34 can be conveniently replaced, which reduces the operation difficulty of replacing the diaphragm 33 and is conducive to improving work efficiency.

[0041] In some embodiments, referring to Figure 2 and Figure 3The inner positioning assembly 40 further comprises inner forming blocks 46, which are detachably connected to the inner inserts 43 and arranged on the side of the inner inserts 43 facing the to-be-injection holes 202. The inner forming blocks 46 are arranged in correspondence with the inner openings of the to-be-injection holes 202, and the inner inserts 43 block the inner openings of the to-be-injection holes 202 through the inner forming blocks 46 so as to be injection molded. The one-to-one correspondence between the inner forming blocks 46 and the inner openings of the to-be-injection holes 202 and the detachable nature of the inner forming blocks 46 make the injection mold 100 convenient to adjust according to different product design requirements. For example, when a workpiece 200 with different internal structures or shape details needs to be produced, only the inner forming blocks 46 with corresponding shapes need to be replaced, and the injection of multiple products can be realized on the basis of the same injection mold 100, thereby improving the versatility of the injection mold 100 and reducing the cost of designing and manufacturing a special mold for each specific product. During the injection molding process, the inner forming blocks 46 may be damaged due to factors such as bearing injection pressure and friction with the injection material. Since the inner forming blocks 46 are detachably connected to the inner inserts 43, when the inner forming blocks 46 are damaged, they can be quickly and conveniently detached and replaced with new inner forming blocks 46, without the need for large-scale maintenance or replacement of the entire inner insert 43 or other parts of the injection mold 100, thereby saving maintenance time, reducing maintenance costs, and improving the use efficiency of the mold.

[0042] The working process of the injection mold 100 provided by the embodiments of the present application is as follows:

[0043] Firstly, the workpiece 200 is placed on the male mold insert 12, and the side wall 201 of the workpiece 200 is correspondingly arranged with the inner inserts 43 and the positioning inserts 45 in the male mold insert 12, and then the mold is closed.

[0044] When the mold is closed, the female mold assembly 20 approaches the male mold assembly 10, and the inclined guide posts 32 connected to the female mold plate 21 gradually insert into the guide holes 311 of the outer inserts 31 on the male mold plate 11 during the mold closing action. When the inclined guide posts 32 are inserted, the outer inserts 31 are driven to move towards the male mold insert 12, until the outer inserts 31 block the outer openings of the to-be-injection holes 202 on the outer side surface of the side wall 201 of the workpiece 200, and the positioning of the outer side surface of the side wall 201 of the workpiece 200 is completed.

[0045] Then, an external force acts on the driving plate 41, and the driving plate 41 starts to move and drives the first pushing member 42 and the second pushing member 44 to move towards the male mold insert 12. The first pushing member 42 pushes the inner inserts 43 to slide along the horizontal direction towards the inner side surface of the side wall 201 of the workpiece 200, until the inner inserts 43 block the inner openings of the to-be-injection holes 202 on the inner side surface of the side wall 201 of the workpiece 200. The second pushing member 44 pushes the two positioning inserts 45 to slide along the horizontal direction towards the inner side surface of the side wall 201 of the workpiece 200, until the two positioning inserts 45 abut against the inner side surface of the side wall 201 of the workpiece 200, and thus the positioning of the workpiece 200 is completed.

[0046] After the male mold insert 12 carries the workpiece 200 and the outer and inner positioning assemblies 40 complete the positioning of the sidewall 201 of the workpiece 200, the molten injection material is injected into the injection hole 202 of the workpiece 200 through the injection hole 23 of the female mold insert 22. During the injection process, the outer insert 31 and the inner insert 43 limit and guide the flow and molding of the injection material, prevent the material from overflowing, and ensure that the material is accurately filled in the injection hole 202.

[0047] After the injection is completed, the mold opening operation is performed, the female mold assembly 20 moves away from the male mold assembly 10, the inclined guide pillar 32 is extracted from the guide hole 311 of the outer insert 31, the outer insert 31 returns to the initial position and no longer abuts the outer side of the sidewall 201 of the workpiece 200. The driving plate 41 moves away from the male mold insert 12 under the action of the reverse external force, drives the first pushing piece 42 and the second pushing piece 44 to move away from the male mold insert 12, the first pushing piece 42 pulls the inner insert 43 away from the inner opening of the injection hole 202 on the inner side of the sidewall 201 of the workpiece 200, and the second pushing piece 44 pulls the positioning insert 45 away from the outer opening of the injection hole 202 on the inner side of the sidewall 201 of the workpiece 200.

[0048] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An injection mold for injection molding a side wall of a workpiece, the side wall of the workpiece being provided with at least one injection molding hole, characterized in that, The injection mold comprises: a matched male mold assembly and a female mold assembly, the male mold assembly comprises a male mold plate and a male mold core connected to the male mold plate, the female mold assembly comprises a female mold plate and a female mold core, the male mold core is used for bearing a workpiece, the female mold core is used for pressing a side wall, and the female mold core is provided with an injection hole communicating with the to-be-injected hole; an outer positioning assembly, comprising an outer core connected to the male mold plate and a plurality of inclined guide columns connected to the female mold plate, the outer core is arranged around the male mold core, the outer core is provided with a guide hole matched with the inclined guide column, and the plurality of inclined guide columns and the plurality of guide holes are arranged one by one, each inclined guide column is used for being inserted into the corresponding guide hole to drive the corresponding outer core to move towards the male mold core during clamping, so that the outer core abuts against the outer opening of the to-be-injected hole; and an inner positioning assembly, comprising a driving plate, at least one first pushing piece and at least one inner core, the driving plate is arranged below the male mold plate, one end of the first pushing piece is connected to the driving plate, and the other end is movably inserted into the male mold core, the inner core is slidably connected to the male mold core in the horizontal direction and is arranged correspondingly to the to-be-injected hole, the inner core corresponds to the first pushing piece, and the inner core is connected to the first pushing piece at an inclined surface, the driving plate is used for driving the first pushing piece to move towards or away from the male mold core under the action of an external force, the first pushing piece pushes or pulls the inner core to move towards or away from the corresponding side wall, so that the inner core abuts against or is away from the inner opening of the to-be-injected hole.

2. The injection mold of claim 1, wherein the outer positioning assembly further comprises a diaphragm, the diaphragm is arranged on the side of the outer core facing the workpiece and corresponds to the outer opening of the to-be-injected hole.

3. The injection mold of claim 1, wherein the inner positioning assembly further comprises a second pushing piece and two positioning cores, one end of the second pushing piece is connected to the driving plate, and the other end is movably inserted into the male mold core, the two positioning cores are slidably connected to the male mold core in the horizontal direction and are arranged in a spaced manner with the inner core, and are symmetrically arranged on the opposite sides of the second pushing piece and connected to the second pushing piece at an inclined surface, the driving plate drives the second pushing piece to move towards or away from the male mold core, and the second pushing piece pushes or pulls the two positioning cores to move in opposite directions to move towards or away from the corresponding two side walls, so that the two positioning cores abut against or are away from the inner side surfaces of the two side walls, respectively.

4. The injection mold of claim 1, wherein the inner core is provided with a sliding protrusion extending in the horizontal direction, the male mold core is provided with a plurality of sliding grooves, each sliding protrusion is correspondingly arranged in one sliding groove, and each inner core is slidably connected to the male mold core through the cooperation of the sliding protrusion and the sliding groove.

5. The injection mold of claim 1, wherein The inner insert is provided with a dovetail groove on the side abutting against the corresponding first pusher, the first pusher is provided with a dovetail protrusion matched with the corresponding dovetail groove, the dovetail protrusion is slidingly arranged in the corresponding dovetail groove, so that when the first pusher moves close to or away from the male mold insert, the corresponding inner insert moves towards or away from the corresponding side wall by the cooperation of the dovetail protrusion and the dovetail groove.

6. The injection mold of claim 3, wherein, The positioning insert comprises a protruding part extending in the horizontal direction, the male mold insert is provided with a plurality of sliding grooves, each protruding part is slidingly arranged in a corresponding sliding groove, and the positioning insert is slidingly connected with the male mold insert through the cooperation of the protruding part and the sliding groove.

7. The injection mold of claim 3, wherein, The positioning insert is provided with a connecting groove on the side opposite to the second pusher, the second pusher is provided with a connecting protrusion matched with the connecting groove on the two sides opposite to the two positioning inserts, and the connecting protrusion is slidingly arranged in the corresponding connecting groove, so that when the second pusher moves close to or away from the male mold insert, the corresponding positioning insert moves towards or away from the corresponding side wall by the cooperation of the connecting protrusion and the connecting groove.

8. The injection mold of claim 2, wherein, The outer positioning assembly further comprises: An outer forming block, which is detachably connected with the outer insert and arranged on the side of the outer insert facing the workpiece, and each outer forming block is arranged corresponding to the outer opening of one of the to-be-injected holes.

9. The injection mold of claim 8, wherein, The diaphragm is arranged on the side of the outer forming block facing the to-be-injected hole.

10. The injection mold of claim 1, wherein, The inner positioning assembly further comprises: An inner forming block, which is detachably connected with the inner insert and arranged on the side of the inner insert facing the to-be-injected hole, and the inner forming block is arranged corresponding to the inner opening of one of the to-be-injected holes.

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