Composite internal drawing device and injection mold

Abstract

The invention relates to the technical field of molds, and discloses a composite internal pulling device and an injection mold, the composite internal pulling device comprises a mold frame, a large straight ejector, a driving mechanism, a first core pulling mechanism and a second core pulling mechanism; in the vertical direction, the large straight ejector can move relative to the mold frame, and the large straight ejector is provided with a first channel, a second channel and a third channel; in the vertical direction, the driving mechanism is movably arranged in the first channel; in the first direction, the first core pulling mechanism is movably arranged in the second channel; in the second direction, the second core pulling mechanism is movably arranged in the third channel, the driving mechanism is provided with a first matching part so as to drive the first core pulling mechanism to move in the first direction when the large straight ejector moves upwards, and the driving mechanism is further provided with a second matching part so as to drive the second core pulling mechanism to move in the second direction when the large straight ejector moves upwards. And when the large straight ejector moves upwards, the second core pulling mechanism is driven to move in the second direction. According to the composite internal pulling device, mold stripping of inverted buckles at different angles can be achieved.

Description

Technical Field

[0001] The present application relates to the field of mold technology, and in particular to a composite internal pumping device and an injection mold. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The heated and melted material is injected into the mold and the molded product is obtained after cooling and solidification.

[0003] In the process of demolding, undercut demolding is an issue that cannot be ignored. Therefore, how to achieve demolding with undercuts at different angles is a technical problem that needs to be solved urgently in mold technology. Summary of the invention

[0004] The present application provides a composite inner extraction device, which can realize demoulding with undercuts at different angles.

[0005] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In the first aspect, an embodiment of the present application provides a composite inner pulling device, including a mold frame, a large straight top, a driving mechanism, a first core pulling mechanism and a second core pulling mechanism; along the vertical direction, the large straight top is movable relative to the mold frame, and the large straight top has a first channel, a second channel and a third channel; along the vertical direction, the driving mechanism is movably arranged in the first channel; along the first direction, the first core pulling mechanism is movably arranged in the second channel; along the second direction, the second core pulling mechanism is movably arranged in the third channel, wherein the driving mechanism is provided with a first matching portion to drive the first core pulling mechanism to move along the first direction when the large straight top moves upward, and the driving mechanism is also provided with a second matching portion to drive the second core pulling mechanism to move along the second direction when the large straight top moves upward.

[0007] The composite inner core pulling device proposed in the embodiment of the present application, the first core pulling mechanism and the second core pulling mechanism can move in different directions respectively, so that it can be suitable for demolding of products with complex structures. Through the joint action of the two core pulling mechanisms, multi-angle and multi-directional undercut demolding can be achieved, thereby realizing the molding of products with undercuts in multiple directions and improving the demolding efficiency.

[0008] Optionally, the lower part of the first channel is opened to form a first opening, and along the vertical direction, the mold frame has a first stop surface arranged opposite to the first opening;

[0009] Along the vertical direction, a first elastic member is arranged between the large straight top and the driving mechanism, and the first elastic member is configured to drive the driving mechanism to move toward the first stop surface when the driving mechanism is separated from the first stop surface.

[0010] In the above scheme, the first elastic member drives the driving mechanism to move automatically, so that the driving mechanism can move automatically with the movement of the large straight top, which can not only provide power for the inner pulling, but also improve the smoothness of the opening and closing of the mold and the core pulling action.

[0011] Optionally, a first limit block is provided on the large straight top, and the first limit block is located in the first channel to limit the movement range of the driving mechanism toward the first stop surface.

[0012] In the above scheme, the first limit block is located in the first channel to limit the movement range of the driving mechanism toward the first stop surface, which can prevent the driving mechanism from moving excessively toward the first stop surface, thereby ensuring that the driving mechanism moves within a predetermined range, thereby improving the accuracy and stability of the demolding process and allowing the driving mechanism to automatically reset.

[0013] Optionally, along the first direction, a second elastic member is provided between the large straight top and the first core-pulling mechanism, and the second elastic member is configured to drive the first core-pulling mechanism to move along the first direction.

[0014] In the above solution, when the driving mechanism moves, the second elastic member can provide necessary elastic force for the first core-pulling mechanism to help the first core-pulling mechanism move along the first direction, thereby realizing undercut demoulding in the first direction.

[0015] Optionally, along the first direction, the first matching portion has a first inclined surface and a second inclined surface that are arranged opposite to each other;

[0016] The first core pulling mechanism is provided with a first groove, the first matching part is provided in the first groove, and along the first direction, the first groove has a first matching surface and a second matching surface which are arranged opposite to each other, the first matching surface is suitable for fitting with the first inclined surface, and the second matching surface is suitable for fitting with the second inclined surface.

[0017] In the above scheme, the first groove and the first mating part can form a tighter connection through the fitting of the first mating surface with the first inclined surface and the fitting of the second mating surface with the second inclined surface. When the first core pulling mechanism is driven and relatively displaced with the driving mechanism, the fitting of the first mating surface with the first inclined surface and the fitting of the second mating surface with the second inclined surface also facilitates the relative displacement between the first mating part and the first groove, thereby helping the first core pulling mechanism to disengage from the driving mechanism, so that the first core pulling mechanism can move more smoothly, thereby improving the reliability and stability of undercut demolding.

[0018] Optionally, a second limit block is provided on the large straight top, and a first limit step is provided on the first core pulling mechanism. Along the first direction, the second limit block and the first limit step are arranged opposite to each other to limit the movement range of the first core pulling mechanism in the first direction.

[0019] In the above scheme, the cooperation between the second limit block and the first limit step can accurately control the moving range of the first core pulling mechanism in the first direction, thereby ensuring that the first core pulling mechanism moves within a predetermined range and preventing the first core pulling mechanism from excessively moving to separate from the driving mechanism, thereby improving the accuracy and stability of the demolding process and facilitating the resetting of the first core pulling mechanism after inverted demolding.

[0020] Optionally, the driving mechanism has a first surface arranged opposite to the inner wall of the first channel, and the first surface is provided with a first wear-resistant sheet.

[0021] In the above scheme, the first surface contacts the inner wall of the first channel. When the driving mechanism moves, the first wear-resistant sheet can reduce the friction and wear between the first surface and the inner wall of the first channel. Since the contact and friction between the driving mechanism and the inner wall of the first channel will cause wear, the wear-resistant sheet can effectively slow down this process and improve the stability and life of the driving mechanism.

[0022] Optionally, along the second direction, a third elastic member is provided between the large straight top and the second core-pulling mechanism, and the third elastic member is configured to drive the second core-pulling mechanism to move along the second direction.

[0023] In the above solution, when the driving mechanism moves, the third elastic member can provide necessary elastic force for the second core-pulling mechanism to help the second core-pulling mechanism move along the second direction, thereby realizing undercut demoulding in the second direction.

[0024] Optionally, the second core pulling mechanism has a first matching hole, and the second matching portion passes through the first matching hole;

[0025] Along the second direction, the second matching portion has a third inclined surface and a fourth inclined surface arranged opposite to each other, the first matching hole has a third matching surface and a fourth matching surface arranged opposite to each other, the third matching surface is suitable for fitting with the third inclined surface, and the fourth matching surface is suitable for fitting with the fourth inclined surface.

[0026] In the above scheme, the first mating hole and the second mating part can form a tighter connection through the fitting of the third mating surface and the third inclined surface, and the fitting of the fourth mating surface and the fourth inclined surface. When the second core pulling mechanism is driven and relatively displaced with the driving mechanism, the fitting of the third mating surface and the third inclined surface, and the fitting of the fourth mating surface and the fourth inclined surface also facilitate the relative displacement between the second mating part and the first mating hole, so that the second core pulling mechanism can move more smoothly, thereby ensuring the reliability and stability of undercut demolding.

[0027] Optionally, a third limit block is provided on the large straight top, and a second limit step is provided on the second core pulling mechanism. Along the second direction, the third limit block and the second limit step are arranged opposite to each other to limit the movement range of the second core pulling mechanism in the second direction.

[0028] In the above scheme, the cooperation between the third limit block and the second limit step can accurately control the moving range of the second core pulling mechanism in the second direction, thereby ensuring that the second core pulling mechanism moves within a predetermined range and preventing the second core pulling mechanism from excessively moving to separate from the driving mechanism, thereby improving the accuracy and stability of the demolding process and facilitating the resetting of the second core pulling mechanism after inverted demolding.

[0029] Optionally, the second core-pulling mechanism has a second surface arranged opposite to the inner wall of the third channel, and a second wear-resistant sheet is arranged on the second surface.

[0030] In the above scheme, the second surface contacts the inner wall of the third channel. When the second core pulling mechanism moves, the second wear-resistant sheet can reduce the friction and wear between the second surface and the inner wall of the third channel. The contact and friction between the second core pulling mechanism and the inner wall of the third channel will cause wear, and the second wear-resistant sheet can effectively slow down this process and improve the stability and life of the second core pulling mechanism during movement.

[0031] Optionally, the driving mechanism includes a driving body and a driving head disposed on the driving body, the driving head is provided with a first matching portion and a second matching portion, and the driving head is detachably disposed on the driving body.

[0032] In the above solution, the driving head and the driving body can move together in the first channel, and the driving head and the driving body are detachably connected, which is convenient for disassembly, replacement and maintenance, and improves the applicability of the driving mechanism.

[0033] Optionally, a first water channel is provided in the first core-pulling mechanism;

[0034] The composite inner pumping device also includes a water channel connecting block, which passes through the large straight top to be connected with the first core pulling mechanism, and the water channel connecting block has a second water channel communicated with the first water channel.

[0035] In the above scheme, cooling water is transported to the first core-pulling mechanism through the water connection block, which can improve the sealing and stability of the water connection, help reduce the risk of water leakage, and improve the reliability and safety of the system.

[0036] In a second aspect, an embodiment of the present application provides an injection mold, comprising the composite internal pumping device described in any one of the embodiments.

[0037] Since the injection mold of the embodiment of the present application has the above-mentioned composite internal extraction device, it is convenient for demolding in multiple directions, thereby improving the applicability of the injection mold for complex products. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present application;

[0040] Figure 2 It is a schematic cross-sectional view of the overall structure in the embodiment of the present application;

[0041] Figure 3 This is a schematic cross-sectional view of the first elastic member in the embodiment of the present application;

[0042] Figure 4 This is a schematic diagram of the cross-sectional structure of the second elastic member in the embodiment of the present application;

[0043] Figure 5 This is a schematic cross-sectional view of the first matching portion in the embodiment of the present application;

[0044] Figure 6 This is a schematic diagram of the structure of the first limit block in the embodiment of the present application;

[0045] Figure 7 This is a schematic cross-sectional view of the third elastic member in the embodiment of the present application;

[0046] Figure 8 This is a schematic cross-sectional view of the second matching portion in the embodiment of the present application;

[0047] Fig. 9 This is a schematic diagram of the structure of the second limit block in the embodiment of the present application;

[0048] Fig.10 It is a structural schematic diagram of the driving mechanism in the embodiment of the present application.

[0049] [Description of Reference Numerals]

[0050] 100: mold frame; 110: first stop surface;

[0051] 200: large straight top; 210: first channel; 211: first opening; 220: second channel; 230: third channel; 240: first limit block; 200a: ejector rod;

[0052] 300: driving mechanism; 300a: first surface; 301: first wear-resistant sheet; 302: driving body; 303: driving head; 304: connecting block; 305: pressure-bearing sheet;

[0053] 310: first matching portion; 311: first inclined surface; 312: second inclined surface;

[0054] 320: second matching portion; 321: third inclined surface; 321a: third wear-resistant sheet; 322: fourth inclined surface;

[0055] 330: first elastic member; 330a: nitrogen spring; 340: second elastic member; 350: second limit block; 360: third elastic member; 370: third limit block;

[0056] 400: first core pulling mechanism; 401: lubricating oil tank;

[0057] 410: first groove; 411: first mating surface; 412: second mating surface;

[0058] 420: first limiting step;

[0059] 430: First Waterway;

[0060] 500: second core pulling mechanism; 500a: second surface; 501: second wear-resistant sheet;

[0061] 510: first matching hole; 511: third matching surface; 512: fourth matching surface;

[0062] 520: second limiting step;

[0063] 600: water channel connection block; 601: sealing ring; 610: second water channel;

[0064] X: first direction; Y: second direction. DETAILED DESCRIPTION

[0065] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0067] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0068] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0070] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0071] After the product is injected, the mold needs to be opened to remove the product. Since the injection molded part becomes hard after cooling, it is usually necessary to rely on the mold's ejection system to remove the product from the mold. This process usually involves the design and manufacture of the mold to ensure that the product can be separated from the mold smoothly.

[0072] The internal pull-out mechanism can generally only form undercuts in the same demolding direction. For undercuts with multiple demolding directions, the ordinary internal pull-out mechanism cannot form the product.

[0073] In view of this, in order to demould the two undercuts that overlap in the main demoulding direction, the embodiment of the present application provides a composite inner extraction device, please refer to Figure 1 and Figure 2 , including a mold frame 100, a large straight top 200, a driving mechanism 300, a first core pulling mechanism 400 and a second core pulling mechanism 500.

[0074] In the vertical direction, the large straight pusher 200 is movable relative to the mold frame 100. It can be understood that the large straight pusher 200 can play the role of lifting the plastic part. In the synchronous ejection stage of the injection molding process, the large straight pusher 200 presses the plastic part along the demolding direction to make it stick to the cavity, providing opportunities for the large inclined pushers on both sides to pull and deform the plastic part and detach it from the cavity, thereby preventing the cavity from pulling and damaging the two ends of the plastic part at the moment of mold opening.

[0075] The large straight top 200 has a first channel 210 , a second channel 220 and a third channel 230 . It is understandable that the first channel 210 , the second channel 220 and the third channel 230 can all be used for undercut demolding.

[0076] The driving mechanism 300 is movably disposed in the first channel 210 along the vertical direction. That is, the driving mechanism 300 can move in the first channel 210 along the vertical direction.

[0077] The first core-pulling mechanism 400 is movably disposed in the second channel 220 along the first direction X. That is, the first core-pulling mechanism 400 can move along the first direction X in the second channel 220 .

[0078] The second core-pulling mechanism 500 is movably disposed in the third channel 230 along the second direction Y. That is, the second core-pulling mechanism 500 can move along the second direction Y in the third channel 230 .

[0079] It can be understood that by arranging the driving mechanism 300 and the two core-pulling mechanisms in different channels respectively, the internal space of the large straight top 200 can be effectively utilized, making the mold structure more compact.

[0080] The driving mechanism 300 is provided with a first matching portion 310 to drive the first core pulling mechanism 400 to move along the first direction X when the large straight top 200 moves upward. It can be understood that the first matching portion 310 can drive the first core pulling mechanism 400 to move along the first direction X in the second channel 220, thereby realizing undercut demolding in the first direction X.

[0081] The driving mechanism 300 is also provided with a second matching portion 320 to drive the second core pulling mechanism 500 to move along the second direction Y when the large straight top 200 moves upward. It can be understood that the second matching portion 320 can drive the second core pulling mechanism 500 to move along the second direction Y in the third channel 230, thereby realizing the undercut demolding in the second direction Y.

[0082] In the above scheme, the first core pulling mechanism 400 and the second core pulling mechanism 500 can move in different directions respectively, so that it can be suitable for demolding products with complex structures, especially workpiece structures with multiple holes or depressions in different directions on the side. Through the joint action of the two core pulling mechanisms, multi-angle and multi-directional undercut demolding can be achieved, thereby realizing the molding of products with undercuts in multiple directions and improving the demolding efficiency.

[0083] By providing the first matching portion 310 and the second matching portion 320, the first core pulling mechanism 400 and the second core pulling mechanism 500 can be driven to move respectively, thereby improving the accuracy and synchronization of the demoulding action and reducing the probability of product damage or mold damage caused by improper demoulding.

[0084] In other embodiments, please refer to Figure 3 The bottom of the first channel 210 is open to form a first opening 211. It can be understood that the first opening 211 faces the mold frame 100, so that the driving mechanism 300 in the first channel 210 can approach or move away from the mold frame 100 along the vertical direction.

[0085] Along the vertical direction, the mold frame 100 has a first stop surface 110 arranged opposite to the first opening 211. It can be understood that the first stop surface 110 can play the role of stopping the large straight top 200. When the large straight top 200 moves in the vertical direction, the large straight top 200 can approach or move away from the first stop surface 110, and when the large straight top 200 abuts against the first stop surface 110, the first stop surface 110 can block the first opening 211.

[0086] Along the vertical direction, a first elastic member 330 is disposed between the large straight top 200 and the driving mechanism 300 . It can be understood that the first elastic member 330 can be extended and retracted between the large straight top 200 and the driving mechanism 300 .

[0087] The first elastic member 330 is configured to drive the driving mechanism 300 to move toward the first stop surface 110 when the driving mechanism 300 is separated from the first stop surface 110. It can be understood that, through the telescopic effect of the first elastic member 330, a relative displacement can be generated between the driving mechanism 300 and the large straight top 200, so that the driving mechanism 300 moves in the first channel 210.

[0088] At the same time, the large straight top 200 moves in the vertical direction, and the large straight top 200 is separated from the first stop surface 110, so that the first stop surface 110 no longer blocks the first opening 211, so that when the driving mechanism 300 moves toward the first stop surface 110, it can extend out of the first opening 211 in the vertical direction and continue to move toward the first stop surface 110.

[0089] In the above scheme, the first elastic member 330 drives the driving mechanism 300 to move automatically, so that the driving mechanism 300 can move automatically with the movement of the large straight top 200, which can not only provide power for the internal pulling, but also improve the smoothness of the opening and closing of the mold and the core pulling action.

[0090] In other embodiments, please refer to Figure 3 A first limiting block 240 is provided on the large straight top 200 . It can be understood that the first limiting block 240 can play a limiting role, and the limiting effect changes with the movement of the large straight top 200 .

[0091] The first limiting block 240 is located in the first channel 210 . It can be understood that the first limiting block 240 can play a limiting role in the first channel 210 , and can limit the driving mechanism 300 moving in the first channel 210 .

[0092] The first limit block 240 is located in the first channel 210 to limit the movement range of the driving mechanism 300 toward the first stop surface 110, which can prevent the driving mechanism 300 from excessively moving toward the first stop surface 110, thereby preventing the driving mechanism 300 from detaching from the large straight top 200, facilitating the resetting of the driving mechanism 300 and improving the smoothness of the opening and closing and core pulling actions of the mold.

[0093] In the above solution, the limit block can ensure that the driving mechanism 300 moves within a predetermined range, thereby improving the accuracy and stability of the demoulding process and allowing the driving mechanism 300 to reset automatically.

[0094] In other embodiments, please refer to Figure 4 Along the first direction X, a second elastic member 340 is provided between the large straight top 200 and the first core-pulling mechanism 400. It can be understood that the second elastic member 340 is elastic and can play a role of telescoping between the large straight top 200 and the first core-pulling mechanism 400.

[0095] The second elastic member 340 is configured to drive the first core pulling mechanism 400 to move along the first direction X. It is understandable that the first core pulling mechanism 400 can move relative to the large straight top 200 as the second elastic member 340 expands and contracts, thereby moving in the second channel 220 and achieving undercut demolding in the first direction X.

[0096] In the above solution, when the driving mechanism 300 moves, the second elastic member 340 can provide necessary elastic force for the first core pulling mechanism 400 to help the first core pulling mechanism 400 move along the first direction X, thereby achieving undercut demoulding in the first direction X.

[0097] In addition, the second elastic member 340 facilitates the reset of the first core-pulling mechanism 400 after being inverted out of the mold and prepares for the next ejection, thereby improving the smoothness of the overall action.

[0098] In other embodiments, please refer to Figure 5 Along the first direction X, the first matching portion 310 has a first inclined surface 311 and a second inclined surface 312 that are relatively arranged. It can be understood that the first inclined surface 311 and the second inclined surface 312 can help the first core-pulling mechanism 400 and the driving mechanism 300 to move relative to each other, thereby reducing the probability of the first core-pulling mechanism 400 and the driving mechanism 300 getting stuck to each other during movement.

[0099] At the same time, due to the cooperation between the first inclined surface 311 and the second inclined surface 312 , no matter whether the first core-pulling mechanism 400 moves forward or backward along the first direction X, the first matching portion 310 can maintain a good matching state with the first groove 410 .

[0100] The first core pulling mechanism 400 is provided with a first groove 410 . It is understandable that the first groove 410 is recessed into the first core pulling mechanism 400 along the first direction X to facilitate cooperation with the first matching portion 310 and facilitate movement of the first core pulling mechanism 400 in the second channel 220 .

[0101] The first mating portion 310 is arranged in the first groove 410. Along the first direction X, the first groove 410 has a first mating surface 411 and a second mating surface 412 that are relatively arranged. It can be understood that the first mating surface 411 and the second mating surface 412 can help the first core pulling mechanism 400 and the driving mechanism 300 to move relative to each other. Since the contact between the inclined surfaces reduces the friction, the movement between the driving mechanism 300 and the first core pulling mechanism 400 is smoother and more efficient.

[0102] The first mating surface 411 is suitable for being fitted with the first inclined surface 311, and the second mating surface 412 is suitable for being fitted with the second inclined surface 312. Through the fitting of the first mating surface 411 with the first inclined surface 311 and the fitting of the second mating surface 412 with the second inclined surface 312, the first groove 410 and the first mating portion 310 can form a tighter connection, and when the first core pulling mechanism 400 is driven to have a relative displacement with the driving mechanism 300, the fitting of the first mating surface 411 with the first inclined surface 311 and the fitting of the second mating surface 412 with the second inclined surface 312 also facilitates the relative displacement between the first mating portion 310 and the first groove 410, thereby helping the first core pulling mechanism 400 to detach from the driving mechanism 300, so that the first core pulling mechanism 400 can move more smoothly, thereby improving the reliability and stability of the undercut demolding.

[0103] In other embodiments, please refer to Figure 6 A second limit block 350 is provided on the large straight top 200 . It can be understood that the second limit block 350 can play a role in limiting the position of the large straight top 200 .

[0104] The first core-pulling mechanism 400 is provided with a first limiting step 420 . It can be understood that the first limiting step 420 can play a role in limiting the first core-pulling mechanism 400 .

[0105] Along the first direction X, the second limiting block 350 is disposed opposite to the first limiting step 420 to limit the movement range of the first core pulling mechanism 400 in the first direction X.

[0106] In the above scheme, the cooperation between the second limit block 350 and the first limit step 420 can accurately control the moving range of the first core pulling mechanism 400 in the first direction X, thereby ensuring that the first core pulling mechanism 400 moves within a predetermined range, preventing the first core pulling mechanism 400 from excessively moving to separate from the driving mechanism 300, thereby improving the accuracy and stability of the demolding process, and facilitating the resetting of the first core pulling mechanism 400 after inverted demolding.

[0107] In other embodiments, please refer to Figure 6 The driving mechanism 300 has a first surface 300 a arranged opposite to the inner wall of the first channel 210 , and the first surface 300 a is provided with a first wear-resistant sheet 301 .

[0108] It can be understood that the first surface 300a is in contact with the inner wall of the first channel 210. When the driving mechanism 300 moves, the first wear-resistant sheet 301 can reduce the friction and wear between the first surface 300a and the inner wall of the first channel 210. Since the contact and friction between the driving mechanism 300 and the inner wall of the first channel 210 will cause wear, the wear-resistant sheet can effectively slow down this process and improve the stability and life of the driving mechanism 300.

[0109] In addition, the provision of the wear-resistant sheet can increase the contact area between the first surface 300a and the inner wall of the first channel 210, thereby providing better stability and support, and helping to ensure the stability and reliability of the driving mechanism 300 during the operation of the mold.

[0110] As an example, there may be multiple first surfaces 300a, there may be multiple first wear-resistant sheets 301, and multiple first wear-resistant sheets 301 may be respectively arranged on multiple surfaces of the driving mechanism 300, thereby further reducing the contact and friction between the driving mechanism 300 and the inner wall of the first channel 210.

[0111] In other embodiments, please refer to Figure 7 Along the second direction Y, a third elastic member 360 is provided between the large straight top 200 and the second core-pulling mechanism 500. It can be understood that the third elastic member 360 is elastic and can play a role of telescoping between the large straight top 200 and the second core-pulling mechanism 500.

[0112] The third elastic member 360 is configured to drive the second core pulling mechanism 500 to move along the second direction Y. It is understandable that the second core pulling mechanism 500 can move relative to the large straight top 200 as the third elastic member 360 expands and contracts, thereby moving in the third channel 230 and realizing the inverted demolding in the second direction Y.

[0113] In the above solution, when the driving mechanism 300 moves, the third elastic member 360 can provide necessary elastic force for the second core pulling mechanism 500 to help the second core pulling mechanism 500 move along the second direction Y, thereby realizing the undercut demoulding in the second direction Y.

[0114] In addition, the third elastic member 360 facilitates the resetting of the second core-pulling mechanism 500 after being inverted out of the mold and prepares for the next ejection, thereby improving the smoothness of the overall action.

[0115] In other embodiments, please refer to Figure 8 The second core pulling mechanism 500 has a first matching hole 510 . It can be understood that the first matching hole 510 runs through the second core pulling mechanism 500 , so as to facilitate the matching between the second core pulling mechanism 500 and the driving mechanism 300 .

[0116] The second matching part 320 passes through the first matching hole 510. It can be understood that the first matching part 310 can slide along the first matching hole 510, so that the second matching part 320 can limit the second core pulling mechanism 500 through the first matching hole 510, thereby realizing the locking and fixation of the second core pulling mechanism 500 and the driving mechanism 300.

[0117] Along the second direction Y, the second mating portion 320 has a third inclined surface 321 and a fourth inclined surface 322 that are relatively arranged. It can be understood that the third inclined surface 321 and the fourth inclined surface 322 can help the second core pulling mechanism 500 and the driving mechanism 300 to move relative to each other, ensure that the second core pulling mechanism 500 and the driving mechanism 300 move smoothly with respect to each other, and reduce the probability of the second core pulling mechanism 500 and the driving mechanism 300 getting stuck with each other during movement.

[0118] At the same time, the cooperation between the third inclined surface 321 and the fourth inclined surface 322 ensures that the second matching portion 320 can maintain a good matching state with the first matching hole 510 regardless of whether the second core pulling mechanism 500 moves forward or backward along the second direction Y, thereby ensuring the smoothness of the core pulling process.

[0119] The first mating hole 510 has a third mating surface 511 and a fourth mating surface 512 that are relatively arranged. It can be understood that the third mating surface 511 and the fourth mating surface 512 can help the second core pulling mechanism 500 and the driving mechanism 300 to move relative to each other. Since the contact between the inclined surfaces reduces friction, the movement between the driving mechanism 300 and the second core pulling mechanism 500 is smoother and more efficient.

[0120] The third mating surface 511 is suitable for fitting with the third inclined surface 321, and the fourth mating surface 512 is suitable for fitting with the fourth inclined surface 322. Through the fitting of the third mating surface 511 with the third inclined surface 321 and the fitting of the fourth mating surface 512 with the fourth inclined surface 322, the first mating hole 510 and the second mating part 320 can form a tighter connection. When the second core pulling mechanism 500 is driven to have relative displacement with the driving mechanism 300, the fitting of the third mating surface 511 with the third inclined surface 321 and the fitting of the fourth mating surface 512 with the fourth inclined surface 322 also facilitates the relative displacement between the second mating part 320 and the first mating hole 510, so that the second core pulling mechanism 500 can move more smoothly, thereby ensuring the reliability and stability of the undercut demolding.

[0121] In other embodiments, please refer to Fig. 9 A third limiting block 370 is provided on the large straight top 200 . It can be understood that the third limiting block 370 can play a limiting role on the large straight top 200 .

[0122] The second core-pulling mechanism 500 is provided with a second limiting step 520. It can be understood that the second limiting step 520 can limit the position of the second core-pulling mechanism 500.

[0123] Along the second direction Y, the third limiting block 370 is disposed opposite to the second limiting step 520 to limit the movement range of the second core pulling mechanism 500 in the second direction Y.

[0124] In the above scheme, the cooperation between the third limit block 370 and the second limit step 520 can accurately control the moving range of the second core pulling mechanism 500 in the second direction Y, thereby ensuring that the second core pulling mechanism 500 moves within a predetermined range, preventing the second core pulling mechanism 500 from excessively moving to separate from the driving mechanism 300, thereby improving the accuracy and stability of the demolding process, and facilitating the resetting of the second core pulling mechanism 500 after inverted demolding.

[0125] In other embodiments, please refer to Fig. 9 The second core-pulling mechanism 500 has a second surface 500 a arranged opposite to the inner wall of the third channel 230 , and a second wear-resistant sheet 501 is arranged on the second surface 500 a .

[0126] It can be understood that the second surface 500a is in contact with the inner wall of the third channel 230. When the second core pulling mechanism 500 moves, the second wear-resistant sheet 501 can reduce the friction and wear between the second surface 500a and the inner wall of the third channel 230. The contact and friction between the second core pulling mechanism 500 and the inner wall of the third channel 230 will cause wear, and the second wear-resistant sheet 501 can effectively slow down this process and improve the stability and life of the second core pulling mechanism 500 during movement.

[0127] In addition, the provision of the wear-resistant sheet can increase the contact area between the second surface 500a and the inner wall of the third channel 230, thereby providing better stability and support, and helping to ensure the stability and reliability of the second core pulling mechanism 500 during mold operation.

[0128] As an example, there may be multiple second surfaces 500a, there may be multiple second wear-resistant sheets 501, and multiple second wear-resistant sheets 501 may be respectively arranged on multiple surfaces of the second core pulling mechanism 500, thereby further reducing the contact and friction between the second core pulling mechanism 500 and the inner wall of the third channel 230.

[0129] In other embodiments, please refer to Fig.10 The driving mechanism 300 includes a driving body 302 and a driving head 303 disposed on the driving body 302 . It can be understood that the driving head 303 and the driving body 302 move together in the first channel 210 .

[0130] The driving head 303 is provided with a first matching portion 310 and a second matching portion 320 , and the driving head 303 is detachably disposed on the driving body 302 .

[0131] In the above scheme, the driving head 303 is provided with a first matching portion 310 and a second matching portion 320, the first core pulling mechanism 400 and the second core pulling mechanism 500 can be matched with the driving head 303, and the driving head 303 and the driving body 302 are detachably connected, which is convenient for disassembly, replacement and maintenance, thereby improving the applicability of the driving mechanism 300.

[0132] In other embodiments, please refer to Figure 7 A first water channel 430 is provided in the first core-pulling mechanism 400. It can be understood that the first water channel 430 can play a role in conveying cooling water, thereby reducing the temperature of the first core-pulling mechanism 400 and facilitating demoulding.

[0133] The composite internal pumping device also includes a water channel connection block 600, through which the cooling water can be easily circulated inside the composite internal pumping device. The water channel connection block 600 passes through the large straight top 200 to be connected to the first core pulling mechanism 400, thereby playing the role of conveying cooling water to the first core pulling mechanism 400. The water channel connection block 600 has a second water channel 610 connected to the first water channel 430, so that the cooling water can smoothly pass through the second water channel 610 and the first water channel 430 to reach the first core pulling mechanism 400, thereby ensuring the cooling effect at the first core pulling mechanism 400.

[0134] In the above solution, cooling water is supplied to the first core-pulling mechanism 400 via the water connection block 600, which can ensure the sealing and stability of the water connection, help reduce the risk of water leakage, and improve the reliability and safety of the system.

[0135] In a specific embodiment, please refer to Figure 2 The large straight top 200 is provided with a plurality of ejector rods 200 a extending in a vertical direction. The plurality of ejector rods 200 a penetrate the large straight top 200 and move along the vertical direction together with the large straight top 200 .

[0136] Please refer to Fig.10 The first elastic member 330 is constructed as a nitrogen spring 330a. The nitrogen spring 330a refers to an elastic component using high-pressure nitrogen as a working medium. It does not require pre-tightening, can provide a gentle elastic force curve, and can achieve constant pressure and delayed action, thereby ensuring the order of undercut demolding.

[0137] One end of the water channel connection block 600 is screwed to the first core-pulling mechanism 400 , and the other end of the water channel connection block 600 is provided with a sealing ring 601 , which can seal the water channel, thereby ensuring the reliability of the internal pumping device.

[0138] The first core pulling mechanism 400 is provided with a meshed lubricating oil groove 401. Along the second direction Y, the lubricating oil groove 401 is arranged opposite to the driving head 303. The lubricating oil groove 401 can store oil and lubricate, thereby improving the smoothness of movement of the first core pulling mechanism 400, helping the first core pulling mechanism 400 and the driving mechanism 300 to move relative to each other, and reducing the wear of the first core pulling mechanism 400.

[0139] The third inclined surface 321 is provided with a third wear-resistant sheet 321a, which can reduce the friction between the third inclined surface 321 and the third matching surface 511, so as to make the mutual movement between the driving mechanism 300 and the second core-pulling mechanism 500 more stable, reduce wear and increase service life.

[0140] The movement process of the driving mechanism 300 is briefly described below.

[0141] When the large straight ejector 200 is ejected upward, the connecting block 304 provided at the bottom of the driving mechanism 300 loses the squeezing force of the large straight ejector 200 and is lifted up by the first elastic member 330, and the connecting block 304 drives the driving body 302 and the driving head 303 to move in the direction of the elastic force, thereby realizing a vertical downward ejection action. When the large straight ejector 200 moves downward to reset, the connecting block 304 contacts the mold frame 100, and the connecting block 304 is pressed back vertically upward by the mold frame 100, and the driving mechanism realizes a reset action.

[0142] The movement process of the first core-pulling mechanism 400 is briefly described below.

[0143] At the initial stage of the composite inner pulling device performing the pop-up action, since the driving mechanism 300 moves in the opposite direction to the large straight top 200 under the action of the first elastic member 330, the first core pulling mechanism 400 is no longer squeezed by the large straight top 200, so that the second elastic member 340 pops the first core pulling mechanism 400 out along the first direction. At this time, the first matching portion 310 on the driving mechanism 300 will contact the first groove 410 of the first core pulling mechanism 400 through the inclined surface and hook the first groove 410, assisting the first core pulling mechanism 400 to perform the pop-up action to prevent the first core pulling mechanism 400 from being unable to pop out when the elastic force of the second elastic member 340 is insufficient. After the first core pulling mechanism 400 moves a certain distance, the two gradually separate due to the different movement directions of the driving mechanism 300.

[0144] When the driving mechanism 300 is reset, the large straight pusher 200 descends, and the pressure-bearing sheet 305 provided on the driving mechanism 300 contacts the top surface of the first core-pulling mechanism 400, pressing the first core-pulling mechanism 400 back to its original position.

[0145] The movement process of the second core-pulling mechanism 500 is briefly described below.

[0146] At the initial stage of the composite inner-pulling device performing the ejection action, the driving mechanism 300 moves in the opposite direction to the large straight top 200 under the action of the first elastic member 330, so that the second core-pulling mechanism 500 is no longer squeezed by the large straight top 200, so that the third elastic member 360 ejects the second core-pulling mechanism 500 along the second direction, and at this time, the fourth inclined surface 322 on the second matching portion 320 will contact the fourth matching surface 512 on the first matching hole 510, assisting the second core-pulling mechanism 500 to perform the ejection action, in order to prevent the second core-pulling mechanism 500 from being unable to eject when the elastic force of the third elastic member 360 is insufficient. After the second core-pulling mechanism 500 moves a certain distance, the two gradually separate due to the different movement directions of the driving mechanism 300. When the driving mechanism 300 is reset, the large straight top 200 descends, and the third wear-resistant sheet 321a on the driving mechanism 300 contacts the third matching surface 511 on the first matching hole 510, driving the second core-pulling mechanism 500 to reset.

[0147] In other embodiments, the present application discloses an injection mold, including a molding part system, a casting system, a guiding and positioning system, a temperature regulation system, an exhaust system, an ejection system and a core pulling system, wherein the molding part system includes a large straight top 200, a mold frame 100 and a slanted top, the large straight top 200 is suitable for molding the injection molded part into a required structure, and the mold frame 100 is suitable for accommodating the large straight top 200; the large straight top is provided with a composite internal extraction device in any of the above embodiments.

[0148] Since the injection mold of the present application is provided with the composite internal extraction device in any of the above-mentioned embodiments, the applicability of the injection mold to complex products is improved.

[0149] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0150] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0151] The above is only the embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0152] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A composite internal pumping device, characterized in that: include: Moulding frame; A large straight top, which is movable relative to the mold frame in a vertical direction, and has a first channel, a second channel and a third channel; A driving mechanism, wherein the driving mechanism is movably disposed on the first channel along a vertical direction; A first core-pulling mechanism, which is movably disposed in the second channel along a first direction; A second core-pulling mechanism, which is movably disposed on the third channel along a second direction; Among them, the driving mechanism is provided with a first matching part to drive the first core-pulling mechanism to move along the first direction when the large straight top moves upward, and the driving mechanism is also provided with a second matching part to drive the second core-pulling mechanism to move along the second direction when the large straight top moves upward.

2. The composite internal pumping device according to claim 1, characterized in that: The lower part of the first channel is open to form a first opening, and along the vertical direction, the mold frame has a first stop surface arranged opposite to the first opening; Along the vertical direction, a first elastic member is provided between the large straight top and the driving mechanism, and the first elastic member is configured to drive the driving mechanism to move toward the first stop surface when the driving mechanism is separated from the first stop surface.

3. The composite internal pumping device according to claim 2, characterized in that: A first limit block is disposed on the large straight top, and the first limit block is located in the first channel to limit the movement range of the driving mechanism toward the first stop surface.

4. The composite internal pumping device according to claim 1, characterized in that: Along the first direction, a second elastic member is arranged between the large straight top and the first core-pulling mechanism, and the second elastic member is configured to drive the first core-pulling mechanism to move along the first direction.

5. The composite internal pumping device according to claim 4, characterized in that: Along the first direction, the first matching portion has a first inclined surface and a second inclined surface which are arranged opposite to each other; The first core pulling mechanism is provided with a first groove, the first matching part is arranged in the first groove, and along the first direction, the first groove has a first matching surface and a second matching surface arranged opposite to each other, the first matching surface is suitable for fitting with the first inclined surface, and the second matching surface is suitable for fitting with the second inclined surface.

6. The composite internal pumping device according to claim 4, characterized in that: A second limit block is arranged on the large straight top, and a first limit step is arranged on the first core pulling mechanism. Along the first direction, the second limit block is arranged opposite to the first limit step to limit the movement range of the first core pulling mechanism in the first direction.

7. The composite internal pumping device according to claim 1, characterized in that: The driving mechanism has a first surface arranged opposite to the inner wall of the first channel, and the first surface is provided with a first wear-resistant sheet.

8. The composite internal pumping device according to claim 1, characterized in that: Along the second direction, a third elastic member is provided between the large straight top and the second core-pulling mechanism, and the third elastic member is configured to drive the second core-pulling mechanism to move along the second direction.

9. The composite internal pumping device according to claim 8, characterized in that: The second core pulling mechanism has a first matching hole, and the second matching portion passes through the first matching hole; Along the second direction, the second matching portion has a third inclined surface and a fourth inclined surface arranged opposite to each other, the first matching hole has a third matching surface and a fourth matching surface arranged opposite to each other, the third matching surface is suitable for fitting with the third inclined surface, and the fourth matching surface is suitable for fitting with the fourth inclined surface.

10. The composite internal pumping device according to claim 8, characterized in that: A third limit block is arranged on the large straight top, and a second limit step is arranged on the second core pulling mechanism of the driving mechanism. Along the second direction, the third limit block and the second limit step are arranged opposite to each other to limit the movement range of the second core pulling mechanism in the second direction.

11. The composite internal pumping device according to claim 1, characterized in that: The second core-pulling mechanism has a second surface arranged opposite to the inner wall of the third channel, and a second wear-resistant sheet is arranged on the second surface.

12. The composite internal pumping device according to claim 1, characterized in that: The driving mechanism comprises a driving body and a driving head arranged on the driving body, the driving head is provided with the first matching portion and the second matching portion, and the driving head is detachably arranged on the driving body.

13. The composite internal pumping device according to claim 1, characterized in that: A first water channel is provided in the first core-pulling mechanism; The composite inner pumping device further comprises a water channel connection block, the water channel connection block passes through the large straight top to be connected with the first core pulling mechanism, and the water channel connection block has a second water channel communicated with the first water channel.

14. An injection mold, characterized in that: The invention comprises the composite internal pumping device described in any one of claims 1 to 13.

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