A core pulling mechanism and injection mold

Abstract

The present invention provides a core pulling mechanism and an injection mold, the core pulling mechanism comprises a fixed mold, a fixed mold core, a movable mold, a guide assembly, a connecting assembly and a limiting assembly; the fixed mold and the movable mold are arranged relatively; the fixed mold core is located between the fixed mold and the movable mold; the connecting assembly comprises a first connecting member and a second connecting member that are detachably connected, the first connecting member is arranged on the fixed mold, and the second connecting member is arranged on the movable mold; when the first connecting member is connected to the second connecting member, the movable mold is suitable for moving along the mold opening direction together with the fixed mold during the mold opening process, so that the fixed mold core moves on the guide assembly in a direction intersecting with the mold opening direction; when the first connecting member is separated from the second connecting member, the limiting assembly is suitable for separating the fixed mold and the movable mold during the mold opening process. The present invention has a simple structure, reduced matching requirements, and can greatly reduce the cost of injection molds.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to a core pulling mechanism and an injection mold. Background Art

[0002] In injection molded products, such as air conditioner shell components, undercuts are a relatively common structure. Usually, a slanted top core-pulling mechanism is used to achieve lateral core pulling of the product, that is, separation from the product is achieved through the oblique movement of the slanted top. However, when the product has a deep cavity undercut, due to the large size of the deep cavity undercut, the required size of the core-pulling mechanism should also be large. Therefore, it is difficult to achieve using the general slanted top method, and additional matching structures need to be added, which will make the core-pulling structure complicated, increase the matching requirements, and greatly increase the cost of the injection mold. Summary of the invention

[0003] The problem solved by the invention is how to provide a core pulling mechanism with a simple structure.

[0004] In order to solve the above problems, the present invention provides a core pulling mechanism, comprising a fixed mold, a fixed mold core, a movable mold, a guide assembly, a connecting assembly and a limit assembly; the fixed mold and the movable mold are arranged opposite to each other; the fixed mold core is located inside the fixed mold; the connecting assembly comprises a first connecting member and a second connecting member that are detachably connected, the first connecting member is arranged on the fixed mold, and the second connecting member is arranged on the movable mold;

[0005] When the first connecting member is connected to the second connecting member, the movable mold is suitable for moving together with the fixed mold along the mold opening direction during the mold opening process, so that the fixed mold core moves on the guide assembly along the direction intersecting with the mold opening direction;

[0006] When the first connecting member is separated from the second connecting member, the limiting assembly is suitable for separating the fixed mold and the movable mold during the mold opening process.

[0007] In this way, during the mold opening process, when the first connecting member is connected to the second connecting member, the movable mold and the fixed mold move together in the mold opening direction. During this process, under the action of the guide component, the fixed mold core moves in a direction intersecting with the mold opening direction, thereby realizing the core pulling of the product; when the first connecting member is separated from the second connecting member, the fixed mold continues to move, and under the action of the limit component, the fixed mold and the movable mold are separated from each other. After the movable mold runs to a certain distance, it is convenient to take out the molded product. Compared with the traditional inclined top core pulling, its structure is simple, the matching requirements are reduced, and the cost of injection molds will be greatly reduced.

[0008] Optionally, the first connecting member includes an adjusting component with adjustable length, and the second connecting member is provided with a slot structure; the adjusting component is suitable for extending into or out of the slot structure.

[0009] In this way, since the length of the adjusting component is adjustable, the adjusting component can be extended into the slot structure in the extended state to realize the locking connection between the first connecting member and the second connecting member, so as to facilitate the joint movement of the fixed mold and the movable mold; when the adjusting component is in the shortened state, it can be separated from the slot structure to realize the separation of the first connecting member and the second connecting member, so that the fixed mold no longer moves with the movable mold.

[0010] Optionally, the first connecting member also includes a fixing seat with a placement groove inside, and the fixing seat is connected to the fixed mold; the adjustment component includes an elastic member and a protrusion, the elastic member is located in the placement groove, and one end of the protrusion extends into the placement groove and is connected to the elastic member; when the elastic member is in an extended state, the protrusion is located in the slot structure; when the elastic member is in a contracted state, the protrusion is disengaged from the slot structure.

[0011] In this way, the fixed seat is used to cooperate with the telescopic movement of the adjusting component. When the protrusion of the adjusting component is squeezed, it will compress the elastic part, thereby changing the position of the protrusion to achieve the purpose of changing the length of the adjusting component; therefore, when the elastic part is in an extended state, the protrusion is located in the slot structure; when the elastic part is in a contracted state, the protrusion is separated from the slot structure.

[0012] Optionally, the second connecting member includes a limit block, the limit block is connected to the movable mold, and the slot structure is provided on a side of the limit block facing the first connecting member.

[0013] In this way, the limiting block is connected to the movable mold, and a clamping groove structure is provided on the side facing the first connecting member, which is not only convenient for cooperation with the first connecting member, but also convenient for maintenance.

[0014] Optionally, the connecting assembly further comprises a driving member, and the driving member is suitable for driving the protrusion to disengage from the slot structure.

[0015] Optionally, the driving member is a pull rod, which is suitable for connecting to the hot runner plate or the fixed mold plate; the limit block is provided with a through slot structure, and the through slot structure is communicated with the slot structure; one end of the pull rod passes through the through slot structure and is provided with a protrusion with a sloped portion, and the protrusion is suitable for driving the protrusion to disengage from the slot structure through the sloped portion.

[0016] In this way, during the mold opening process, the pull rod and the through-slot structure undergo relative displacement. When the protrusion of the pull rod contacts the bump, due to the presence of the inclined portion of the protrusion and the elastic part connected to the bump, the bump moves toward the inside of the fixed seat during the upward movement of the protrusion, eventually causing the bump to disengage from the slot structure.

[0017] Optionally, the guide assembly includes a first guide structure and a second guide structure; the first guide structure and the second guide structure are both slidably connected to the fixed mold core to guide the fixed mold core to move along the core pulling direction.

[0018] Optionally, the first guide structure is a guide groove structure on the fixed mold that is inclined relative to a horizontal plane; the fixed mold core includes a first sliding block that cooperates with the guide groove structure, and the first sliding block is slidably connected to the guide groove structure.

[0019] In this way, the arrangement of the guide groove structure and the first sliding block not only facilitates the movement of the fixed mold core along the core pulling direction, but also has a simple structure and is easy to produce.

[0020] Optionally, the second guide structure includes a first block, one end of which is suitable for connecting to the hot runner plate, and the other end extends into the interior of the fixed mold and is inclined relative to the horizontal plane to provide a first matching piece; the fixed mold is provided with a second matching piece that cooperates with the first matching piece, and the first matching piece and the second matching piece are slidably connected.

[0021] In this way, the first matching piece is tiltedly arranged on the first block. Since the first matching piece and the second matching piece are slidably connected, displacements in the horizontal and vertical directions will occur during the sliding process, thereby making it easier to demould the product.

[0022] Optionally, the first mating piece is a groove structure arranged on the first block, and the second mating piece is a boss structure arranged on the side end of the fixed template, or the first mating piece is a boss structure arranged on the first block, and the second mating piece is a groove structure arranged on the side end of the fixed template, and the boss structure is suitable for sliding in the groove structure.

[0023] In this way, the groove structure and the boss structure are simple in design, easy to manufacture, and highly versatile, thereby making the structure of the core pulling mechanism simpler, which is beneficial to reducing manufacturing costs.

[0024] Optionally, the second guide structure also includes a second block, one end of which is suitable for connecting to the hot runner plate, and the other end of which is inclined relative to the horizontal plane and provided with a third matching piece, the inclination direction of the third matching piece is parallel to the inclination direction of the first matching piece, and the fixed mold is provided with a fourth matching piece that cooperates with the third matching piece, and the third matching piece and the fourth matching piece are slidably connected.

[0025] In this way, the third matching piece is tilted on the second block, and the tilting direction of the third matching piece is parallel to the tilting direction of the first matching piece. During the movement of the fixed mold along the core pulling direction, the matching relationship between the second block and the fixed mold achieves the purpose of stable movement of the fixed mold.

[0026] Optionally, the third mating piece is a channel structure arranged on the second block, and the fourth mating piece is a guide block arranged on the fixed template, or the third mating piece is a guide block arranged on the second block, and the fourth mating piece is a channel structure arranged on the fixed template, and the guide block is suitable for sliding in the channel structure.

[0027] In this way, the channel structure and the guide block are simple in design, easy to manufacture, and highly versatile, thereby making the structure of the core pulling mechanism simpler, which is beneficial to reducing manufacturing costs.

[0028] Optionally, the limiting assembly includes a pull plate, one end of which is suitable for connection with the hot runner plate or the fixed mold plate, and the other end is provided with a first limiting portion; the fixed mold plate is provided with a second limiting portion that cooperates with the first limiting portion, and when the first limiting portion and the second limiting portion are connected, the fixed mold and the movable mold are separated.

[0029] In this way, during the mold opening process, when the first limit part and the second limit part are connected, the fixed mold is connected to the hot runner plate or the fixed mold plate, and no longer follows the movement of the fixed mold, which facilitates the separation of the fixed mold and the movable mold, thereby facilitating the removal of the molded product.

[0030] Optionally, the first limiting portion is an undercut structure; the second limiting portion is a slideway structure on the fixed mold, and the undercut structure is located in the slideway structure.

[0031] In this way, the undercut structure and the slideway structure are simple in design, easy to manufacture, and highly versatile, thereby making the structure of the core pulling mechanism simpler and helping to reduce manufacturing costs.

[0032] Optionally, the limiting assembly further includes a base provided with a guide groove, the base is connected to the fixed mold, and the pull plate is slidably connected to the guide groove.

[0033] In this way, the base is provided with a guide groove, which limits the displacement of the pull plate in the left and right directions, which not only facilitates the stable movement of the pull plate, but also has a simple structure and is easy to produce.

[0034] Another object of the present invention is to provide an injection mold to solve the problem of how to provide a core pulling mechanism with a simple structure.

[0035] To solve the above problems, the technical solution of the present invention is achieved as follows:

[0036] An injection mold comprises any one of the core pulling mechanisms described above.

[0037] The advantages of the injection mold and the core pulling mechanism described above over the prior art are the same and will not be described in detail here.

[0038] Optionally, it also includes a hot runner plate and a fixed mold plate, the driving part of the core pulling mechanism and the pulling plate of the limiting assembly of the core pulling mechanism are connected to the hot runner plate or the fixed mold plate, and the first block and the second block of the second guide structure of the core pulling mechanism are connected to the hot runner plate.

[0039] In this way, the existence of the hot runner plate and the fixed mold plate facilitates the connection with some components in the core pulling mechanism, thereby facilitating the normal core pulling of the fixed mold and the normal separation of the movable mold and the fixed mold during the mold opening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic structural diagram of an implementation of an injection mold according to an embodiment of the present invention;

[0041] Figure 2 A structural schematic diagram of an injection mold according to an embodiment of the present invention from one perspective;

[0042] Figure 3 It is a schematic diagram of assembling a fixed mold plate, a hot runner plate and a fixed mold according to an embodiment of the present invention;

[0043] Figure 4 It is a schematic diagram of assembling a fixed mold and a fixed plate of an embodiment of the present invention;

[0044] Figure 5 A structural schematic diagram of an implementation method of a fixed mold core according to an embodiment of the present invention;

[0045] Figure 6 A structural schematic diagram of a fixed mold core from another perspective of an embodiment of the present invention;

[0046] Figure 7 This is a structural schematic diagram of an implementation method of a fixed mold in an embodiment of the present invention;

[0047] Figure 8 A schematic structural diagram of an implementation method of a pressing block according to an embodiment of the present invention;

[0048] Fig. 9 is an exploded schematic diagram of a first block according to an embodiment of the present invention;

[0049] Fig.10 is an exploded schematic diagram of a connection assembly according to an embodiment of the present invention;

[0050] Fig.11 This is a diagram of the use state of the limit assembly of an embodiment of the present invention during mold closing;

[0051] Fig.12 This is a diagram showing the use state of the limit assembly of an embodiment of the present invention when the mold is opened;

[0052] Fig.13This is a schematic diagram of assembling an implementation manner of a limit assembly according to an embodiment of the present invention;

[0053] Fig.14 This is a schematic diagram of the structure of an implementation method of a product of an embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 100-fixed mold, 200-fixed mold core, 300-movable mold, 400-guide assembly, 500-connection assembly, 600-limit assembly, 700-hot runner plate, 800-fixed mold plate, 900-product, 110-movable mold plate, 120-push rod, 130-movable mold core;

[0056] 101- notch, 102- pressing block structure, 103- slideway structure, 201- first slider, 202- second matching piece, 203- fourth matching piece, 401- first block, 402- second block, 403- guide groove structure, 501- first connecting piece, 502- second connecting piece, 503- driving piece, 601- base, 602- inverted buckle structure, 901- deep cavity inverted buckle;

[0057] 1011-first inclined plane, 1021-second inclined plane, 1022-stop block, 4011-first matching piece, 4012-first mounting portion, 4013-second mounting portion, 4021-third matching piece, 5011-upper seat, 5012-lower seat, 5013-protrusion, 5014-elastic piece, 5015-adjustment assembly, 5021-first limiting block, 5022-second limiting block, 5023-slot structure, 5024-through slot structure, 5031-protrusion, 5032-inclined portion. DETAILED DESCRIPTION

[0058] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0059] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "rear", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and a coordinate system XYZ is set herein, wherein the positive direction of the X-axis represents the right direction, the reverse direction of the X-axis represents the left direction, the positive direction of the Y-axis represents the rear direction, the reverse direction of the Y-axis represents the front direction, the positive direction of the Z-axis represents the top, and the reverse direction of the Z-axis represents the bottom; these are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0060] like Fig.14As shown, there is a deep cavity undercut 901 on the right side of the product 900, which makes it very difficult to achieve molding. Usually, a core pulling mechanism is required for lateral core pulling during demoulding. It is difficult to achieve lateral core pulling using a general inclined top and slider lateral core pulling mechanism. At the same time, for undercuts, due to their large size, the required lateral core pulling mechanism is also large in size, and their appearance requires high precision, which will make the lateral core pulling structure complicated, increase the matching requirements, and greatly increase the mold cost.

[0061] like Figure 1 , 2 As shown, an embodiment of the present invention provides a core pulling mechanism, comprising a fixed mold 100, a fixed mold core 200, a movable mold 300, a guide assembly 400, a connecting assembly 500 and a limiting assembly 600; the fixed mold 100 and the movable mold 300 are arranged opposite to each other; the fixed mold core 200 is located inside the fixed mold 100; the connecting assembly 500 comprises a first connecting member 501 and a second connecting member 502 that are detachably connected, the first connecting member 501 is arranged on the fixed mold 100, and the second connecting member 502 is arranged on the movable mold 300;

[0062] When the first connecting member 501 is connected to the second connecting member 502, the movable mold 300 is suitable for moving together with the fixed mold 100 along the mold opening direction during the mold opening process, so that the fixed mold core 200 moves on the guide assembly 400 along the direction intersecting the mold opening direction;

[0063] When the first connecting member 501 is separated from the second connecting member 502 , the limiting assembly 600 is suitable for separating the fixed mold 100 and the movable mold 300 during the mold opening process.

[0064] After adopting the core pulling mechanism of this embodiment, during the mold opening process, when the first connecting member 501 is connected to the second connecting member 502, the movable mold 300 and the fixed mold 100 move together along the mold opening direction. During this process, under the action of the guide assembly 400, the fixed mold core 200 moves along the direction intersecting the mold opening direction, such as Figure 2 In the structure shown, the fixed mold core 200 moves obliquely to the upper left, thereby realizing the core pulling of the product 900; when the first connecting member 501 is separated from the second connecting member 502, the fixed mold 100 continues to move, and under the action of the limiting assembly 600, the fixed mold 100 and the movable mold 300 are separated from each other, and after the movable mold 300 runs to a certain distance, it is convenient to take out the molded product 900. Compared with the traditional inclined top core pulling, its structure is simple, the matching requirements are reduced, and the cost of the injection mold will be greatly reduced.

[0065] In this embodiment, the mold opening process can be divided into two stages. In the first stage, the fixed mold 100 and the movable mold 300 move together, and the fixed mold core 200 is pulled out through the guide assembly 400; in the second stage, the fixed mold 100 and the movable mold 300 are separated until the distance between the two is convenient for taking out the product 900.

[0066] In this embodiment, the mold opening direction refers to the direction in which the movable mold 300 moves, which generally moves downward. Figure 1 As shown, the movement is in the opposite direction along the Z axis.

[0067] Optionally, the first connecting member 501 includes an adjustable length adjustment component 5015, and the second connecting member 502 is provided with a slot structure 5023; the adjustment component 5015 is suitable for extending into or out of the slot structure 5023. Since the length of the adjustment component 5015 is adjustable, the adjustment component 5015 can extend into the slot structure 5023 in an extended state to achieve the engagement of the first connecting member 501 and the second connecting member 502, so as to facilitate the joint movement of the fixed mold 100 and the movable mold 300; the adjustment component 5015 can be out of the slot structure 5023 in a shortened state to achieve the separation of the first connecting member 501 and the second connecting member 502, so as to cause the fixed mold 100 to no longer move with the movable mold 300.

[0068] Specifically, Figure 2 , 3 As shown in , 4, and 10, the first connecting member 501 also includes a fixing seat with a placement groove inside, and the fixing seat is connected to the fixed mold 100; the adjusting component 5015 includes an elastic member 5014 and a protrusion 5013, the elastic member 5014 is located in the placement groove, and one end of the protrusion 5013 extends into the placement groove and is connected to the elastic member 5014; when the elastic member 5014 is in an extended state, the protrusion 5013 is located in the slot structure 5023; when the elastic member 5014 is in a contracted state, the protrusion 5013 is separated from the slot structure 5023. Therefore, the fixing seat is used to cooperate with the telescopic movement of the adjusting component 5015. When the protrusion 5013 of the adjusting component 5015 is squeezed, it will compress the elastic member 5014, thereby realizing the change of the position of the protrusion 5013, so as to achieve the purpose of changing the length of the adjusting component 5015; therefore, when the elastic member 5014 is in an extended state, the protrusion 5013 is located in the slot structure 5023; when the elastic member 5014 is in a contracted state, the protrusion 5013 is separated from the slot structure 5023.

[0069] In this embodiment, Fig.10As shown, the fixing seat includes an upper seat body 5011 and a lower seat body 5012, a placement groove is provided between the upper seat body 5011 and the lower seat body 5012, and one end of the protrusion 5013 extends into the placement groove and is connected to the elastic member 5014. Specifically, the upper seat body 5011 and the lower seat body 5012 are both provided with threaded holes, and the fixed mold 100 is provided with matching through holes or threaded holes. When the threaded holes of the upper seat body 5011 and the lower seat body 5012 are aligned with the corresponding through holes or threaded holes on the fixed mold 100, they are fixedly connected by fasteners such as screws.

[0070] like Fig.10 As shown, one end of the upper seat 5011 facing the lower seat 5012 is provided with a groove structure with openings at both ends. After the upper seat 5011 and the lower seat 5012 are fixed on the fixed mold 100, the groove structure of the upper seat 5011 and the upper end surface of the lower seat 5012 form a placement groove; in other embodiments, both the upper seat 5011 and the lower seat 5012 are provided with a groove structure with openings at both ends. After the upper seat 5011 and the lower seat 5012 are fixed on the fixed mold 100, the groove structures of the two form a placement groove; or, one end of the lower seat 5012 facing the upper seat 5011 is provided with a groove structure with openings at both ends. After the upper seat 5011 and the lower seat 5012 are fixed on the fixed mold 100, the groove structure and the upper end surface of the lower seat 5012 form a placement groove.

[0071] In this embodiment, the elastic member 5014 is a spring, and a hole structure is provided at one end of the protrusion 5013 extending into the placement groove, and one end of the spring is fixed in the hole structure, thereby achieving the fixation of the spring and the protrusion 5013. At the same time, in order to facilitate the stable retraction of the protrusion 5013, multiple springs can be provided, and the specific number depends on actual needs.

[0072] Optionally, the second connecting member 502 includes a stopper, the stopper is connected to the movable mold 300, and the stopper is provided with the slot structure 5023 on the side facing the first connecting member 501. Thus, the stopper is connected to the movable mold 300, and the slot structure 5023 is provided on the side facing the first connecting member 501, which is not only convenient for cooperation with the first connecting member 501, but also convenient for maintenance.

[0073] In this embodiment, Fig.10 As shown, the limit block includes a first limit block 5021 and a second limit block 5022. The first limit block 5021 is connected to the movable mold 300. The first limit block 5021 is fixedly arranged above the second limit block 5022. The first limit block 5021 and the second limit block 5022 form a slot structure 5023 on the side facing the first connecting member 501.

[0074] Optionally, the connection assembly 500 further includes a driving member 503 , and the driving member 503 is suitable for driving the protrusion 5013 to disengage from the slot structure 5023 .

[0075] Specifically, the driving member 503 is a pull rod, which is suitable for connecting with the hot runner plate 700 or the fixed mold plate 800; the limit block is provided with a through slot structure, which is in communication with the clamping slot structure 5023; one end of the pull rod passes through the through slot structure and is provided with a protrusion 5031 with an inclined portion 5032, and the protrusion 5031 is suitable for driving the protrusion 5013 to disengage from the clamping slot structure 5023 through the inclined portion 5032. Therefore, during the mold opening process, the pull rod and the through slot structure are relatively displaced, and when the protrusion 5031 of the pull rod contacts the protrusion 5013, due to the existence of the inclined portion 5032 of the protrusion 5031 and the elastic member 5014 connected to the protrusion 5013, during the upward movement of the protrusion 5031, the protrusion 5013 moves toward the inside of the fixing seat, and finally causes the protrusion 5013 to disengage from the clamping slot structure 5023.

[0076] In this embodiment, the first limit block 5021 and the second limit block 5022 both include a bottom plate and two side plates. The two side plates are respectively arranged at opposite ends of the bottom plate, and a through groove structure is formed between the bottom plate and the two side plates, thereby making the structure simple and easy to produce, while reducing the weight of the limit block.

[0077] Optionally, the guide assembly 400 includes a first guide structure and a second guide structure; the first guide structure and the second guide structure are both slidably connected to the fixed mold core 200 to guide the fixed mold core 200 to move along the core pulling direction.

[0078] Specifically, the first guide structure is a guide groove structure 403 arranged on the fixed mold 100 and inclined relative to the horizontal plane; the fixed mold core 200 includes a first slider 201 matched with the guide groove structure 403, and the first slider 201 is slidably connected with the guide groove structure 403. Therefore, the arrangement of the guide groove structure 403 and the first slider 201 not only facilitates the movement of the fixed mold core 200 along the core pulling direction, but also has a simple structure and is easy to produce.

[0079] like Figure 1As shown, the fixed mold core 200 is located inside the fixed mold 100, and is fixed by the cooperation of the guide groove structure 403 and the first slider 201. Specifically, a cavity is formed inside the fixed mold 100, and the two side walls of the fixed mold 100 in the width direction are respectively provided with two guide groove structures 403 communicated with the cavity; two first sliders 201 matching the guide groove structures 403 are provided on both sides of the width direction of the fixed mold core 200. When the four first sliders 201 are located in the four guide groove structures 403, the fixed mold core 200 is fixed in the fixed mold 100.

[0080] like Figure 7 As shown, the side wall of the fixed mold 100 is provided with a notch 101, and the notch 101 is provided with a first inclined surface 1011; the fixed mold 100 is detachably provided with a pressure block structure 102 at the notch 101, and the pressure block structure 102 is provided with a second inclined surface 1021. When the pressure block structure 102 is fixed on the fixed mold 100, a guide groove structure 403 is formed between the first inclined surface 1011 and the second inclined surface 1021.

[0081] like Figure 8 As shown, the block structure 102 is provided with a stopper 1022 protruding upward on the side of the first inclined surface 1011 facing the movable mold 300. After the block structure 102 is assembled, the stopper 1022 is located at one end of the guide groove structure 403. Thus, it plays a role of limiting and preventing the first slider 201 from leaving the guide groove structure 403.

[0082] In this embodiment, in the cross section of the fixed mold 100 in the length direction, the length of the guide groove structure 403 is greater than the length of the first slider 201 , so that the first slider 201 can move in the guide groove structure 403 .

[0083] Specifically, the second guide structure includes a first block 401, one end of which is suitable for connecting with the hot runner plate 700, and the other end of which extends into the interior of the fixed mold 100 and is provided with a first matching piece 4011 inclined relative to the horizontal plane; the fixed mold 100 is provided with a second matching piece 202 that matches with the first matching piece 4011, and the first matching piece 4011 and the second matching piece 202 are slidably connected. In this way, the first matching piece 4011 is obliquely arranged on the first block 401, and since the first matching piece 4011 and the second matching piece 202 are slidably connected, displacements in the horizontal and vertical directions will occur during the sliding process, thereby making it easier to demold the product 900.

[0084] Specifically, the first matching piece 4011 is a groove structure provided on the first block 401, and the second matching piece 202 is a boss structure provided on the side end of the fixed template 800, or the first matching piece 4011 is a boss structure provided on the first block 401, and the second matching piece 202 is a groove structure provided on the side end of the fixed template 800, and the boss structure is suitable for sliding in the groove structure. In this way, the groove structure and the boss structure are simple in design, easy to manufacture, and highly versatile, thereby making the structure of the core pulling mechanism simpler, which is conducive to reducing the manufacturing cost.

[0085] like Figure 3 , 5 As shown in FIGS. 6 and 9, the first matching piece 4011 is a boss structure provided on the first block 401, and the second matching piece 202 is a groove structure provided on the side end of the fixed mold plate 800. In order to facilitate the stable matching of the two, the boss structure is a T-block and the groove structure is a T-slot. During the mold opening movement, the first slider 201 moves to the upper right along the guide groove structure 403, and the groove structure on the side end of the fixed mold plate 800 moves to the lower left along the boss structure, thereby realizing the core pulling of the fixed mold core 200.

[0086] When the first matching piece 4011 on the first block 401 is a boss structure, the two can be made in one piece or in a detachable structure, such as Fig. 9 As shown, the boss structure is a separate entity, which is provided with a first mounting portion 4012, and a second mounting portion 4013 inclined relative to the horizontal plane is provided on the first block 401, and the first mounting portion 4012 and the second mounting portion 4013 are connected; the first mounting portion 4012 and the second mounting portion 4013 are respectively a slot and an insert, so that the boss structure can be replaced after being worn.

[0087] Optionally, the second guide structure further includes a second block 402, one end of which is suitable for connection with the hot runner plate 700, and the other end of which is provided with a third matching piece 4021 inclined relative to the horizontal plane, and the inclination direction of the third matching piece 4021 is parallel to the inclination direction of the first matching piece 4011, and the fixed mold 100 is provided with a fourth matching piece 203 matched with the third matching piece 4021, and the third matching piece 4021 is slidably connected with the fourth matching piece 203. Thus, the third matching piece 4021 is obliquely provided on the second block 402, and the inclination direction of the third matching piece 4021 is parallel to the inclination direction of the first matching piece 4011, and in the process of the fixed mold 100 moving along the core pulling direction, the matching relationship between the second block 402 and the fixed mold 100 serves to achieve the purpose of stable movement of the fixed mold 100.

[0088] Specifically, the third matching piece 4021 is a channel structure provided on the second block 402, and the fourth matching piece 203 is a guide block provided on the fixed template 800, or the third matching piece 4021 is a guide block provided on the second block 402, and the fourth matching piece 203 is a channel structure provided on the fixed template 800, and the guide block is suitable for sliding in the channel structure. Thus, the channel structure and the guide block are simple in design, easy to manufacture, and highly versatile, thereby making the structure of the core pulling mechanism simpler, which is conducive to reducing the manufacturing cost.

[0089] like Figure 3 As shown, the guide block is a square guide column, whereby the channel structure is a matching square, and the square is positioned symmetrically in two of the six directions, so that good matching accuracy can be achieved.

[0090] Optionally, the stopper assembly 600 includes a pull plate, one end of which is suitable for connecting with the hot runner plate 700 or the fixed mold plate 800, and the other end is provided with a first stopper; the fixed mold plate 800 is provided with a second stopper that cooperates with the first stopper, and when the first stopper and the second stopper are connected, the fixed mold 100 and the movable mold 300 are separated. Therefore, during the mold opening process, when the first stopper and the second stopper are connected, the fixed mold 100 is connected with the hot runner plate 700 or the fixed mold plate 800, and at this time, it no longer moves with the fixed mold 100, which facilitates the separation of the fixed mold 100 and the movable mold 300, thereby facilitating the removal of the molded product 900.

[0091] Specifically, Fig.13 As shown, the first limiting part is an undercut structure 602; the second limiting part is a slideway structure 103 on the fixed mold 100, and the undercut structure 602 is located in the slideway structure 103. Therefore, the undercut structure 602 and the slideway structure 103 are simple in design, easy to manufacture, and highly versatile, thereby making the structure of the core pulling mechanism simpler, which is conducive to reducing manufacturing costs.

[0092] Alternatively, if Fig.13 As shown, the position limiting assembly 600 further includes a base 601 provided with a guide groove, the base 601 is connected to the fixed mold 100, and the pull plate is slidably connected to the guide groove. Thus, the base 601 is provided with a guide groove, which limits the displacement of the pull plate in the left and right directions, which not only facilitates the stable movement of the pull plate, but also has a simple structure and is easy to produce.

[0093] An embodiment of the present invention further provides an injection mold, comprising any of the core pulling mechanisms described above.

[0094] With the injection mold of this embodiment, during the mold opening process, when the first connecting member 501 is connected to the second connecting member 502, the movable mold 300 and the fixed mold 100 move together along the mold opening direction. During this process, under the action of the guide component 400, the fixed mold core 200 moves along the sliding direction intersecting the mold opening direction, thereby realizing the core pulling of the product 900; when the first connecting member 501 is separated from the second connecting member 502, the fixed mold 100 continues to move, and under the action of the limit component 600, the fixed mold 100 and the movable mold 300 are separated from each other. After the movable mold 300 runs to a certain distance, it is convenient to take out the molded product 900. Compared with the traditional inclined top core pulling, its structure is simple and the matching requirements are reduced, which will greatly reduce the cost of the injection mold.

[0095] Optionally, the injection mold further comprises a hot runner plate 700 and a fixed mold plate 800, and the driving member 503 of the core pulling mechanism and the pull plate of the limit assembly 600 of the core pulling mechanism are connected to the hot runner plate 700 or the fixed mold plate 800. The first block 401 and the second block 402 of the second guide structure of the core pulling mechanism are connected to the hot runner plate 700. Therefore, the existence of the hot runner plate 700 and the fixed mold plate 800 facilitates connection with some components in the core pulling mechanism, thereby facilitating the normal core pulling of the fixed mold 100 and the normal separation of the movable mold 300 and the fixed mold 100 during the mold opening process.

[0096] Alternatively, if Figure 1 As shown, the injection mold further includes a movable platen 110, and the movable platen 110 and the movable mold 300 are connected via a push rod 120, whereby, under the action of a power component such as a hydraulic cylinder, the push rod 120 can realize the rising and falling of the movable mold 300.

[0097] Alternatively, if Figure 1 As shown, the injection mold further includes a movable mold core 130 , which is fixed on the upper part of the movable mold 300 , and the product 900 is molded between the movable mold core 130 and the fixed mold core 200 , thereby the movable mold core 130 and the fixed mold core 200 cooperate to achieve core pulling of the product 900 .

[0098] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A core pulling mechanism, characterized in that: The invention comprises a fixed mold (100), a fixed mold core (200), a movable mold (300), a guide assembly (400), a connection assembly (500) and a limit assembly (600); the fixed mold (100) and the movable mold (300) are arranged opposite to each other; the fixed mold core (200) is located inside the fixed mold (100); the connection assembly (500) comprises a first connection member (501) and a second connection member (502) which are detachably connected, the first connection member (501) being arranged on the fixed mold (100), and the second connection member (502) being arranged on the movable mold (300); the guide assembly (400) comprises a first guide structure and a second guide structure; the first guide structure and the second guide structure are both slidably connected to the fixed mold core (200) to guide the fixed mold core (200) to move along a core pulling direction; When the first connecting member (501) is connected to the second connecting member (502), the movable mold (300) is suitable for moving together with the fixed mold (100) along the mold opening direction during the mold opening process, so that the fixed mold core (200) moves on the guide assembly (400) along a direction intersecting the mold opening direction; When the first connecting member (501) is separated from the second connecting member (502), the limiting assembly (600) is suitable for separating the fixed mold (100) and the movable mold (300) during the mold opening process; the first connecting member (501) includes an adjustment assembly (5015) with adjustable length, and the second connecting member (502) is provided with a slot structure (5023); the adjustment assembly (5015) is suitable for extending into or out of the slot structure (5023); the first connecting member (501) also includes a fixing seat with a placement groove inside, and the fixing seat is connected to the fixing seat. The adjusting assembly (5015) comprises an elastic member (5014) and a protrusion (5013), wherein the elastic member (5014) is located in the placement groove, and one end of the protrusion (5013) extends into the placement groove and is connected to the elastic member (5014); when the elastic member (5014) is in an extended state, the protrusion (5013) is located in the slot structure (5023); when the elastic member (5014) is in a contracted state, the protrusion (5013) is separated from the slot structure (5023); The second connecting member (502) comprises a limit block, the limit block is connected to the movable mold (300), and the slot structure (5023) is provided on a side of the limit block facing the first connecting member (501).

2. The core pulling mechanism according to claim 1, characterized in that: The connection assembly (500) further comprises a driving member (503), wherein the driving member (503) is suitable for driving the protrusion (5013) to disengage from the slot structure (5023).

3. The core pulling mechanism according to claim 2, characterized in that: The driving member (503) is a pull rod, which is suitable for connecting to the hot runner plate (700) or the fixed mold plate (800); the limit block is provided with a through slot structure (5024), and the through slot structure (5024) is communicated with the slot structure (5023); one end of the pull rod passes through the through slot structure (5024) and is provided with a protrusion (5031) with an inclined portion (5032), and the protrusion (5031) is suitable for driving the protrusion (5013) to disengage from the slot structure (5023) through the inclined portion (5032).

4. The core pulling mechanism according to claim 1, characterized in that: The first guide structure is a guide groove structure (403) on the fixed mold (100) that is arranged obliquely relative to a horizontal plane; the fixed mold core (200) comprises a first sliding block (201) that cooperates with the guide groove structure (403), and the first sliding block (201) is slidably connected to the guide groove structure (403).

5. The core pulling mechanism according to claim 1, characterized in that: The second guide structure comprises a first block (401), one end of the first block (401) being suitable for connection with the hot runner plate (700), and the other end of the first block extending into the interior of the fixed mold (100) and being provided with a first matching piece (4011) inclined relative to a horizontal plane; the fixed mold (100) is provided with a second matching piece (202) matching with the first matching piece (4011), and the first matching piece (4011) and the second matching piece (202) are slidably connected.

6. The core pulling mechanism according to claim 5, characterized in that: The first mating piece (4011) is a groove structure arranged on the first block (401), and the second mating piece (202) is a boss structure arranged on the side end of the fixed template (800), or the first mating piece (4011) is a boss structure arranged on the first block (401), and the second mating piece (202) is a groove structure arranged on the side end of the fixed template (800), and the boss structure is suitable for sliding in the groove structure.

7. The core pulling mechanism according to claim 5, characterized in that: The second guide structure further comprises a second block (402), one end of the second block (402) being suitable for connection with the hot runner plate (700), and the other end of the second block being provided with a third matching piece (4021) inclined relative to a horizontal plane, the inclination direction of the third matching piece (4021) being parallel to the inclination direction of the first matching piece (4011), the fixed mold (100) being provided with a fourth matching piece (203) matching with the third matching piece (4021), and the third matching piece (4021) and the fourth matching piece (203) being slidably connected.

8. The core pulling mechanism according to claim 7, characterized in that: The third matching piece (4021) is a channel structure arranged on the second block (402), and the fourth matching piece (203) is a guide block arranged on the fixed template (800); or, the third matching piece (4021) is a guide block arranged on the second block (402), and the fourth matching piece (203) is a channel structure arranged on the fixed template (800), and the guide block is suitable for sliding in the channel structure.

9. The core pulling mechanism according to claim 1, characterized in that: The limiting assembly (600) comprises a pull plate, one end of which is suitable for connection with the hot runner plate (700) or the fixed mold plate (800), and the other end of which is provided with a first limiting portion; the fixed mold plate (800) is provided with a second limiting portion that cooperates with the first limiting portion, and when the first limiting portion and the second limiting portion are connected, the fixed mold (100) and the movable mold (300) are separated.

10. The core pulling mechanism according to claim 9, characterized in that: The first limiting portion is an undercut structure (602); the second limiting portion is a slideway structure (103) on the fixed mold (100), and the undercut structure (602) is located in the slideway structure (103).

11. The core pulling mechanism according to claim 9, characterized in that: The limiting assembly (600) further comprises a base (601) provided with a guide groove, the base (601) being connected to the fixed mold (100), and the pulling plate being slidably connected to the guide groove.

12. An injection mold, characterized in that: It comprises a core pulling mechanism as described in any one of claims 1-11.

13. The injection mold according to claim 12, characterized in that: It also includes a hot runner plate (700) and a fixed mold plate (800); the driving member (503) of the core pulling mechanism and the pulling plate of the limiting assembly (600) of the core pulling mechanism are connected to the hot runner plate (700) or the fixed mold plate (800); and the first block (401) and the second block (402) of the second guide structure of the core pulling mechanism are connected to the hot runner plate (700).

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