Injection mold

Abstract

The invention relates to an injection mold. Comprising a fixed mold mechanism; the fixed die mechanism is slidably connected with the fixed die mechanism along a first direction; the sliding mechanism and the fixed mold mechanism are arranged in a sliding mode in the first direction, the sliding mechanism is used for forming an inverted buckle of the product, and when the movable mold mechanism slides away from the fixed mold mechanism, the sliding mechanism slides close to the movable mold mechanism so that the product can be separated from the fixed mold mechanism. When the movable mold mechanism slides away from the fixed mold mechanism, the sliding mechanism slides close to the movable mold mechanism to separate the product from the fixed mold mechanism, so that the constraint of the fixed mold mechanism on the product is eliminated, the product is expanded to a certain extent, and the friction force between a fixed mold ejector pin and the product can be reduced. In the process that the movable mold mechanism continues to move away from the fixed mold mechanism to drive the product to be separated from the fixed mold ejector pin, on one hand, the fixed mold ejector pin can be rapidly separated from the product, and therefore the machining efficiency of the product is improved. And on the other hand, damage to the fixed mold ejector pin and the product due to overlarge friction force is avoided, so that the forming quality of the product is improved.

Description

Technical Field

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

[0002] Injection molds can mold products with thin-walled hole structures, and undercuts are protruding on the inner wall of the hole structure. For traditional injection molds, when processing such products, there is a large adhesion between the product and the injection mold during the demolding process, making it difficult for the product to be demolded smoothly, and even causing damage to the product, ultimately affecting the processing efficiency and molding quality of the product. Summary of the invention

[0003] A technical problem solved by this application is how to improve the processing efficiency and molding quality of the product.

[0004] An injection mold, comprising:

[0005] Fixed mold mechanism;

[0006] A movable mold mechanism is slidably connected to the fixed mold mechanism along a first direction; and

[0007] The sliding mechanism is slidably arranged with the fixed mold mechanism along the first direction, and the sliding mechanism is used for undercutting the molded product. When the movable mold mechanism slides away from the fixed mold mechanism, the sliding mechanism slides close to the movable mold mechanism to separate the product from the fixed mold mechanism.

[0008] In one of the embodiments, the sliding mechanism includes a sliding plate and a fixed mold ejector pin, the fixed mold ejector pin is protrudingly arranged on the sliding plate, the sliding plate is slidably connected to the fixed mold mechanism, and the fixed mold ejector pin is slidably penetrated in the fixed mold mechanism for undercutting the molded product.

[0009] In one of the embodiments, the fixed mold mechanism is provided with a sliding cavity, and the sliding plate is slidably matched with the sliding cavity.

[0010] In one embodiment, the sliding mechanism further includes a pop-up elastic member, and the pop-up elastic member abuts between the fixed mold mechanism and the sliding plate.

[0011] In one of the embodiments, a limiting cavity is provided on the sliding plate and / or the fixed mold mechanism, and the pop-up elastic member is accommodated in the limiting cavity.

[0012] In one embodiment, the pop-up elastic member is a spring.

[0013] In one of the embodiments, the sliding mechanism further comprises a limiting rod slidably disposed in the fixed mold mechanism, one end of the limiting rod is fixedly connected to the sliding plate, and the other end of the limiting rod can extend out of the fixed mold mechanism.

[0014] In one embodiment, the sliding plate includes a first plate and a second plate that are detachably connected, the first plate and the second plate enclose a fixed cavity and are farther away from the movable mold mechanism than the second plate; the limiting rod includes a first limiting portion and a second limiting portion, the second limiting portion is protrudingly arranged on the first limiting portion, the cross-sectional dimension of the first limiting portion is larger than the cross-sectional dimension of the second limiting portion, the first limiting portion is located in the fixed cavity and clamped between the first plate and the second plate, and the second limiting portion is slidably arranged in the fixed mold mechanism.

[0015] In one embodiment, the number of the limiting rods is two, the limiting rods and the fixed mold ejector pins are arranged in a straight line, and the fixed mold ejector pins are located between the two limiting rods.

[0016] In one embodiment, the sliding plate includes a first plate and a second plate that are detachably connected, the first plate and the second plate enclose a fixed cavity and are farther away from the movable mold mechanism than the second plate; the fixed mold ejector includes a first ejector portion and a second ejector portion, the second ejector portion is protrudingly arranged on the first ejector portion, the cross-sectional size of the first ejector portion is larger than the cross-sectional size of the second ejector portion, the first ejector portion is located in the fixed cavity and sandwiched between the first plate and the second plate, and the second ejector portion is penetrated through the second plate.

[0017] A technical effect of an embodiment of the present application is that when the movable mold mechanism slides away from the fixed mold mechanism, the sliding mechanism slides close to the movable mold mechanism to separate the product from the fixed mold mechanism, thereby eliminating the constraint of the fixed mold mechanism on the product, causing the product to expand to a certain extent, thereby reducing the friction between the fixed mold ejector and the product. In the process of the movable mold mechanism continuing to move away from the fixed mold mechanism to drive the product to separate from the fixed mold ejector, on the one hand, the fixed mold ejector can be quickly separated from the product, thereby improving the processing efficiency of the product. On the other hand, it also avoids damage to the fixed mold ejector and the product due to excessive friction, thereby improving the molding quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of an injection mold provided in one embodiment.

[0019] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the product processed by the injection mold shown.

[0020] Figure 3 for Figure 2 Schematic diagram of the three-dimensional cross-sectional structure of the product shown.

[0021] Figure 4 for Figure 1 The three-dimensional cross-sectional structure schematic diagram of the injection mold shown.

[0022] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure within the middle dotted ellipse.

[0023] Figure 6 for Figure 1 Schematic diagram of the three-dimensional structure of the sliding mechanism in the injection mold shown.

[0024] Figure 7 for Figure 6 A schematic diagram of the three-dimensional cross-sectional structure of the sliding mechanism shown.

[0025] Figure 8 for Figure 1 A schematic diagram of a partial three-dimensional cross-sectional structure of the injection mold shown.

[0026] Fig. 9 for Figure 8 Schematic diagram of the local enlarged structure within the middle dotted ellipse.

[0027] Fig.10 for Figure 8 Schematic diagram of the decomposition structure.

[0028] Fig.11 for Fig. 9 Schematic diagram of the local enlarged structure within the middle dotted ellipse.

[0029] Fig.12 for Figure 1 The three-dimensional cross-sectional structural schematic diagram of the injection mold shown in another position.

[0030] Fig.13 for Fig.12 Schematic diagram of the local enlarged structure within the middle dotted ellipse.

[0031] Fig.14 for Figure 1 Schematic diagram of the three-dimensional structure of the driving mechanism in the injection mold shown.

[0032] Fig.15 for Fig.14 Schematic diagram of the exploded structure of the drive mechanism shown.

[0033] Fig.16 for Fig.15 Another view of the state diagram.

[0034] Reference numerals: injection mold 10, product 20, undercut 21, open groove 22, mold cavity 11, fixed mold mechanism 100, sliding cavity 110, limiting cavity 120, movable mold mechanism 200, receiving cavity 210, ejection mechanism 300, first ejection assembly 310, first ejection plate 311, first movable mold ejector pin 312, second ejection assembly 320, second ejection plate 321, guide hole 3211, second movable mold ejector pin 322, first guide rod 330, reset elastic member 340, second guide rod 350, drive mechanism 400, first drive member 4 10. Bottom plate 411. Side plate 412. Groove 4121. Slide groove 413. Second driving member 420. First abutting surface 421. Second abutting surface 422. Unlocking member 430. First unlocking surface 431. Second unlocking surface 432. Driving elastic member 440. Sliding mechanism 500. Sliding plate 510. First plate 511. Second plate 512. Fixed cavity 513. Fixed mold ejector pin 520. First ejector pin portion 521. Second ejector pin portion 522. Pop-up elastic member 530. Limiting rod 540. First limiting portion 541. Second limiting portion 542. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0041] See also Figure 1 , Figure 2 and Figure 3In one embodiment of the present application, an injection mold 10 is provided for processing and molding a product 20 by injection molding, that is, molten plastic liquid is injected into the cavity 11 of the injection mold 10, and the plastic liquid is cooled and solidified under a certain pressure to form the product 20. The injection mold 10 includes a fixed mold mechanism 100, a movable mold mechanism 200, a push mechanism 300, a drive mechanism 400 and a sliding mechanism 500. With the first direction and the second direction set at an angle as a reference, the first direction and the second direction can be perpendicular to each other, and the fixed mold mechanism 100 and the movable mold mechanism 200 slide against each other along the first direction. When the mold is closed, the fixed mold mechanism 100 and the movable mold mechanism 200 surround the cavity 11 for molding the product 20, and the fixed mold mechanism 100 is provided with an injection hole, through which the molten plastic liquid is injected into the cavity 11. The sliding mechanism 500 is arranged on the fixed mold mechanism 100, and the push mechanism 300 and the drive mechanism 400 are arranged on the movable mold mechanism 200. For the formed product 20 , open grooves 22 are provided on two opposite sides. The groove wall of the open groove 22 is relatively thin, and barbs are protruding from the inner wall surface of the open groove 22 .

[0042] See also Figure 4 and Figure 5 In some embodiments, the sliding mechanism 500 is slidably arranged with the fixed mold mechanism 100 along the first direction, and the sliding mechanism 500 is used to form the undercut 21 of the product 20. When the movable mold mechanism 200 slides away from the fixed mold mechanism 100, the sliding mechanism 500 slides close to the movable mold mechanism 200, thereby separating the product 20 from the fixed mold mechanism 100. The sliding mechanism 500 includes a sliding plate 510 and a fixed mold ejector 520. The fixed mold ejector 520 is protrudingly arranged on the sliding plate 510, that is, one end of the fixed mold ejector 520 is fixedly connected to the sliding plate 510, and the other end of the fixed mold ejector 520 extends into the cavity 11 to form the undercut 21 of the product 20. The sliding plate 510 is slidably connected to the fixed mold mechanism 100, and the fixed mold ejector 520 is slidably arranged in the fixed mold mechanism 100. For example, the fixed mold mechanism 100 is provided with a sliding cavity 110 , and the sliding plate 510 is slidably matched with the sliding cavity 110 . By providing the sliding cavity 110 , the sliding accuracy of the sliding plate 510 can be improved.

[0043] See also Figure 5 , Figure 6 and Figure 7In some embodiments, the sliding mechanism 500 further includes a pop-up elastic member 530, which is abutted between the fixed mold mechanism 100 and the sliding plate 510. When the sliding plate 510 moves toward the movable mold mechanism 200 along the first direction, the pop-up elastic member 530 can be stretched and release energy, so that the pop-up elastic member 530 can push the sliding plate 510 to move toward the movable mold mechanism 200. When the sliding plate 510 moves away from the movable mold mechanism 200 along the first direction, the pop-up elastic member 530 is compressed and stores energy, so that the sliding plate 510 overcomes the elastic force of the pop-up elastic member 530 and moves away from the movable mold mechanism 200. The pop-up elastic member 530 can be a spring, such as a cylindrical spring or a conical spring. The sliding plate 510 and / or the fixed mold mechanism 100 are provided with a limiting cavity 120, for example, only the sliding plate 510 is provided with a limiting cavity 120, or only the fixed mold mechanism 100 is provided with a limiting cavity 120, or both the sliding plate 510 and the fixed mold mechanism 100 are provided with a limiting cavity 120, and the pop-up elastic member 530 is accommodated in the limiting cavity 120. On the one hand, the pop-up elastic member 530 makes full use of the space formed by the limiting cavity 120, thereby reducing the occupied space of the sliding mechanism 500, thereby realizing a compact design of the structure of the injection mold 10, and on the other hand, the limiting cavity 120 can constrain the deformation of the pop-up elastic member 530, ensuring that the pop-up elastic member 530 exerts a temporary elastic force on the sliding plate 510 along the first direction, thereby improving the smoothness of the movement of the sliding plate 510 and preventing the sliding plate 510 from being stuck during the movement.

[0044] See also Figure 5 , Figure 6 and Figure 7In some embodiments, the sliding plate 510 includes a first plate 511 and a second plate 512, and the first plate 511 and the second plate 512 are detachably connected, for example, the first plate 511 and the second plate 512 can be bolted. The first plate 511 and the second plate 512 surround a fixed cavity 513, and the first plate 511 is farther away from the movable mold mechanism 200 than the second plate 512, which can be understood as the first plate 511 is located above the second plate 512. The fixed mold ejector 520 includes a first ejector portion 521 and a second ejector portion 522, and the second ejector portion 522 is protrudingly arranged on the end surface of the first ejector portion 521, and the cross-sectional size of the first ejector portion 521 is larger than the cross-sectional size of the second ejector portion 522. The first ejector portion 521 is located in the fixed cavity 513, so that the first ejector portion 521 is sandwiched between the first plate 511 and the second plate 512, so as to achieve a fixed connection relationship between the entire fixed mold ejector 520 and the sliding plate 510. The second ejector pin 522 is inserted into the second plate 512, and the second ejector pin 522 is used for the barb of the product 20. When the first plate 511 and the second plate 512 are disassembled, the fixed mold ejector pin 520 can be maintained and replaced, thereby improving the convenience of maintenance of the sliding mechanism 500. There are multiple fixed mold ejector pins 520 on the same sliding plate 510, and different fixed mold ejector pins 520 can form the undercuts 21 in different open grooves 22 on the product 20.

[0045] See also Figure 5 , Figure 6 and Figure 7In some embodiments, the sliding mechanism 500 further includes a limiting rod 540, which is slidably disposed in the fixed mold mechanism 100, one end of the limiting rod 540 is fixedly connected to the sliding plate 510, and the other end of the limiting rod 540 can extend out of the fixed mold mechanism 100, so that the limiting rod 540 can abut against the movable mold mechanism 200. During the mold closing process, when the movable mold mechanism 200 moves close to the fixed mold mechanism 100, the movable mold mechanism 200 will generate an abutting force on the limiting rod 540, so that the limiting rod 540 pushes the sliding plate 510 to move away from the movable mold mechanism 200. It also makes the limiting rod 540 gradually retract into the fixed mold mechanism 100. When the mold is completely closed, the entire limiting rod 540 can be completely accommodated in the fixed mold mechanism 100, and the end surface of the limiting rod 540 away from the sliding plate 510 can be flush with the surface of the fixed mold mechanism 100. The limiting rod 540 includes a first limiting portion 541 and a second limiting portion 542. The second limiting portion 542 is protrudingly arranged on the end surface of the first limiting portion 541. The cross-sectional dimension of the first limiting portion 541 is larger than the cross-sectional dimension of the second limiting portion 542. The first limiting portion 541 is located in the fixed cavity 513, so that the first limiting portion 541 is sandwiched between the first plate 511 and the second plate 512, so as to achieve a fixed connection relationship between the entire limiting rod 540 and the sliding plate 510. The second limiting portion 542 is penetrated in the fixed mold mechanism 100 and the second plate 512, and the second limiting portion 542 can slide relative to the fixed mold mechanism 100. The second limiting portion 542 can extend out of the fixed mold mechanism 100 and abut against the movable mold mechanism 200.

[0046] See also Figure 5 , Figure 6 and Figure 7 In some embodiments, the number of the limiting rods 540 is two, so that the contact force of the movable mold mechanism 200 on the sliding plate 510 through the limiting rods 540 can be more balanced, thereby improving the smoothness of the sliding plate 510 sliding in the sliding cavity 110. The limiting rods 540 and the fixed mold ejector pins 520 are arranged along a straight line, and a plurality of fixed mold ejector pins 520 are located between the two limiting rods 540. In this way, the structure of the sliding mechanism 500 can be simplified to a certain extent, and the limiting rods 540 can also protect the fixed mold ejector pins 520.

[0047] See also Figure 5 , Figure 6 and Figure 7In the process of mold opening, the movable mold mechanism 200 is firstly made to slide away from the fixed mold mechanism 100, so that a certain distance is formed between the movable mold mechanism 200 and the fixed mold mechanism 100. In the process of the movable mold mechanism 200 moving away from the fixed mold mechanism 100, the spring-up elastic member 530 will release energy, so that the spring-up elastic member 530 pushes the sliding plate 510 to gradually move closer to the movable mold mechanism 200, and also makes the fixed mold ejector pin 520 gradually move closer to the movable mold mechanism 200. At this time, the fixed mold ejector pin 520 will push the product 20 to gradually leave the cavity 11 of the fixed mold mechanism 100. It can be understood that when the sliding plate 510 abuts against the side wall surface of the sliding cavity 110 close to the movable mold mechanism 200, the sliding plate 510 will move to the extreme position and stop moving forward. When the sliding plate 510 moves to the extreme position close to the fixed mold mechanism 100, the product 20 will be completely located outside the cavity 11 of the fixed mold mechanism 100, that is, the product 20 is completely separated from the fixed mold mechanism 100. Since the product 20 is completely separated from the fixed mold mechanism 100, the fixed mold mechanism 100 loses its restraining force on the product 20, so that the product 20 is deformed to a certain extent, so that the width of the open groove 22 is appropriately increased, thereby reducing the matching force and friction resistance between the fixed mold ejector pin 520 and the open groove 22. When the movable mold mechanism 200 continues to move away from the fixed mold mechanism 100 for a certain distance, the movable mold mechanism 200 will drive the product 20 to completely separate from the fixed mold ejector pin 520.

[0048] Therefore, the product 20 is first separated from the fixed mold mechanism 100 by the action of the elastic member, thereby reducing the friction between the fixed mold ejector pin 520 and the product 20, so that on the one hand, the fixed mold ejector pin 520 can be quickly separated from the product 20, thereby improving the processing efficiency of the product 20. On the other hand, it also avoids damage to the fixed mold ejector pin 520 and the product 20 due to excessive friction, thereby improving the molding quality of the product 20.

[0049] See also Figure 4 , Figure 8 and Fig. 9In some embodiments, the ejection mechanism 300 includes a first ejection assembly 310 and a second ejection assembly 320, and the first ejection assembly 310 and the second ejection assembly 320 are slidably connected to the movable mold mechanism 200 along a first direction. The first ejection assembly 310 is used to cooperate with the product 20, and the second ejection assembly 320 is used to form the undercut 21 of the finished product. The first ejection assembly 310 includes a first ejection plate 311 and a first movable mold ejector pin 312, and the first movable mold ejector pin 312 is slidably arranged in the movable mold mechanism 200 and is used to cooperate with the product 20. The movable mold mechanism 200 is provided with a receiving cavity 210, and the first ejection plate 311 is located in the receiving cavity 210, and the first ejection plate 311 is slidably matched with the receiving cavity 210. The first ejection plate 311 can make full use of the existing space of the receiving cavity 210, thereby improving the compact design of the injection mold 10 in structure. The second ejection assembly 320 includes a second ejection plate 321 and a second movable mold ejector pin 322. The second movable mold ejector pin 322 is slidably disposed in the movable mold mechanism 200 and the first ejection plate 311 and is used to form the undercut 21 of the molded product 20. The second ejection plate 321 is also located in the receiving cavity 210. The first ejection plate 311 and the second ejection plate 321 can be slidably connected along the first direction. When the mold is closed, the first ejection plate 311 and the second ejection plate 321 are overlapped with each other, so that the first ejection plate 311 is closer to the fixed mold mechanism 100 than the second ejection plate 321. It can be understood that the first ejection plate 311 is located above the second ejection plate 321.

[0050] See also Fig.12 In some embodiments, the ejection mechanism 300 further includes a first guide rod 330 and a reset elastic member 340. The first guide rod 330 is fixedly connected to the first ejection assembly 310 and is slidably disposed in the movable mold mechanism 200. The reset elastic member 340 is sleeved on the first guide rod 330 and at least partially located in the receiving cavity 210. The reset elastic member 340 abuts between the first ejection plate 311 and the movable mold mechanism 200. When a force is applied to the first ejection plate 311 so that the first ejection plate 311 slides close to the fixed mold mechanism 100, the first guide rod 330 slides relative to the movable mold mechanism 200, and the reset elastic member 340 is compressed to store energy, that is, the first ejection plate 311 overcomes the elastic force of the reset elastic member 340 and moves close to the fixed mold mechanism 100. The first guide rod 330 can play a good guiding role in the sliding of the first ejection plate 311, avoid the first ejection plate 311 from being stuck during the movement, and improve the smoothness and movement accuracy of the first ejection plate 311. When the force acting on the first push plate 311 is cancelled, the resetting elastic member 340 releases energy and pushes the first push plate 311 away from the fixed mold mechanism 100 to reset.

[0051] See also Fig.12In some embodiments, the ejection mechanism 300 further includes a second guide rod 350, both ends of which are fixedly connected to the movable mold mechanism 200, and the second guide rod 350 passes through the receiving cavity 210, so that the second guide rod 350 is slidably arranged between the first ejection plate 311 and the second ejection plate 321. Therefore, when the first ejection plate 311 and the second ejection plate 321 move close to the fixed mold mechanism 100, the second guide rod 350 can play a good guiding role in the movement of the first ejection plate 311 and the second ejection plate 321, thereby improving the smoothness and movement accuracy of the first ejection plate 311 and the second ejection plate 321.

[0052] See also Fig. 9 , Fig.10 and Fig.11 In the process of mold opening, after the movable mold mechanism 200 moves a certain distance away from the fixed mold mechanism 100, the product 20 will completely move to the fixed mold ejector pin 520. At this time, the first ejector plate 311 and the second ejector plate 321 can be synchronously moved close to the fixed mold mechanism 100, that is, the first ejector assembly 310 and the second ejector assembly 320 move synchronously. The first movable mold ejector pin 312 and the second movable mold ejector pin 322 simultaneously apply a resisting force to the product 20, so that the product 20 is ejected from the cavity 11 of the movable mold mechanism 200, that is, the product 20 will be separated from the movable mold mechanism 200, so that the movable mold mechanism 200 loses its restraining force on the product 20, so that the product 20 has a certain expansion deformation, so that the width of the open groove 22 is appropriately increased, thereby reducing the matching force and friction resistance between the second movable mold ejector pin 322 and the open groove 22. After the product 20 is separated from the movable mold mechanism 200, the second push plate 321 can be kept stationary, and the first push plate 311 can move relative to the second push plate 321 close to the fixed mold mechanism 100, that is, the first push assembly 310 and the second push assembly 320 move relative to each other. At this time, the second movable mold ejector pin 322 will push the product 20 to gradually separate from the first movable mold ejector pin 312. After the first push plate 311 moves a set distance relative to the second push plate 321, the product 20 will completely separate from the second movable mold ejector pin 322.

[0053] Therefore, firstly, the first ejection assembly 310 and the second ejection assembly 320 move synchronously to separate the product 20 from the movable mold mechanism 200, thereby reducing the friction between the second movable mold ejector pin 322 and the product 20. In the process of the first ejection plate 311 moving relative to the second ejection plate 321 and approaching the fixed mold mechanism 100, on the one hand, the second movable mold ejector pin 322 can be quickly separated from the product 20, thereby improving the processing efficiency of the product 20. On the other hand, it also avoids damage to the second movable mold ejector pin 322 and the product 20 due to excessive friction, thereby improving the molding quality of the product 20.

[0054] See also Fig.12 and Fig.13 In some embodiments, the number of the driving mechanisms 400 may be two, and the two driving mechanisms 400 are respectively located on opposite sides of the movable mold mechanism 200. The driving mechanism 400 is connected to the movable mold mechanism 200 and the ejection mechanism 300. The driving mechanism 400 can drive the first ejection plate 311 and the second ejection plate 321 to move synchronously, that is, drive the first ejection assembly 310 and the second ejection assembly 320 to move synchronously, so that the product 20 is separated from the cavity 11 of the movable mold mechanism 200 and is located outside the movable mold mechanism 200; it can also drive the first ejection plate 311 and the second ejection plate 321 to move relative to each other, that is, drive the first ejection assembly 310 and the second ejection assembly 320 to move relative to each other, so that the product 20 is separated from the second movable mold ejector pin 322 and the entire second ejection assembly 320.

[0055] See Figure Fig.13 , Fig.14 , Fig.15 and Fig.16 In some embodiments, the driving mechanism 400 includes a first driving member 410, a second driving member 420, an unlocking member 430, and a driving elastic member 440. The first driving member 410 is fixedly connected to the first pushing plate 311 of the first pushing assembly 310, for example, the first driving member 410 and the first pushing plate 311 can be bolted. The second driving member 420 is slidably connected to the second pushing assembly 320 along the second direction, and the unlocking member 430 is fixedly connected to the movable mold mechanism 200, for example, the unlocking member 430 and the movable mold mechanism 200 can be bolted. In the process of the first driving member 410 driving the second driving member 420 to move synchronously along the first direction, the unlocking member 430 drives the second driving member 420 to move away from the first driving member 410 along the second direction until it is separated from the first driving member 410. It can be understood that in the process of the first driving member 410 driving the second driving member 420 to move synchronously along the first direction, the first driving member 410 and the first pushing plate 311 move synchronously, and the first driving member 410 drives the second pushing plate 321 to move synchronously with the first pushing plate 311 through the second driving member 420. After the unlocking member 430 drives the second driving member 420 to disengage from the first driving member 410, the first driving member 410 cannot continue to apply force to the second driving member, and in the process of the first driving member 410 and the first pushing plate 311 moving synchronously close to the fixed mold mechanism 100, the first driving member 410 will not be able to continue to drive the second pushing plate 321 to move synchronously with the first pushing plate 311 through the second driving member 420, so that the second pushing plate 321 is in a stationary state, so that the first pushing plate 311 continues to move close to the fixed mold mechanism 100, while the second pushing plate 321 cannot continue to move close to the fixed mold mechanism 100, so that relative movement occurs between the first pushing plate 311 and the second pushing plate 321.

[0056] See Figure Fig.13 , Fig.14 , Fig.15 and Fig.16 In some embodiments, a guide hole 3211 is provided on the second push plate 321, and the guide hole 3211 extends along the second direction. The guide hole 3211 is formed by a side surface of the second push plate 321 being recessed to a certain depth. The second driving member 420 is generally a block-shaped structure, and the second driving member 420 and the guide hole 3211 are slidably matched along the second direction. The driving elastic member 440 is accommodated in the guide hole 3211, and the driving elastic member 440 abuts between the second driving member 420 and the second push plate 321. When the second driving member 420 gradually extends out of the guide hole 3211, the second driving member 420 gradually moves closer to the first driving member 410 along the second direction, and the driving elastic member 440 stretches and releases energy. The elastic force of the driving elastic member 440 can drive the second driving member 420 to move closer to the first driving member 410; when the second driving member 420 gradually retracts into the guide hole 3211, the second driving member 420 gradually moves away from the first driving member 410 along the second direction, and the driving elastic member 440 is compressed to store energy, that is, the second driving member 420 overcomes the elastic force of the driving elastic member 440 and gradually moves away from the first driving member 410.

[0057] See Figure Fig.13 , Fig.14 , Fig.15 and Fig.16 In some embodiments, the first driving member 410 includes a bottom plate 411 and two side plates 412. The two side plates 412 are protrudingly arranged on the bottom plate 411. The two side plates 412 are spaced apart so that the two side plates 412 and the bottom plate 411 form a slide groove 413. The unlocking member 430 slides with the slide groove 413 along the first direction. One end of the side plate 412 away from the bottom plate 411 is recessed to form a sink groove 4121. The side wall surface of the sink groove 4121 can abut against the second driving member 420 along the first direction. When the side wall of the sink 4121 contacts the second driving member 420, the first driving member 410 can drive the second driving member 420 to move synchronously along the first direction, so that the first push plate 311 and the second push plate 321 move synchronously; when the side wall of the sink 4121 is separated from the second driving member 420, the first driving member 410 cannot contact the second driving member 420, so that the first driving member 410 cannot drive the second driving member 420 to move synchronously along the first direction, so that the first push plate and the second push plate 321 move relative to each other. By providing the sink 4121 and the slide groove 413, the interference between the side wall of the sink 4121 and the unlocking member 430 can be effectively avoided.

[0058] See Figure Fig.13 , Fig.14 , Fig.15 and Fig.16In some embodiments, the outer surface of the second driving member 420 has a first abutting surface 421 and a second abutting surface 422, the first abutting surface 421 and the second abutting surface 422 are connected at an angle, the first abutting surface 421 is closer to the second push plate 321 along the second direction relative to the second abutting surface 422, and the first abutting surface 421 is closer to the fixed mold mechanism 100 along the first direction relative to the second abutting surface 422, so that the first abutting surface 421 is located above the second abutting surface 422. The first abutting surface 421 is arranged at an acute angle to the first direction, and the distance from the first abutting surface 421 to the second push plate 321 gradually decreases from one end of the first abutting surface 421 close to the second abutting surface 422 to the end away from the second abutting surface 422. The second abutting surface 422 can extend along the first direction. The outer surface of the unlocking member 430 has a first unlocking surface 431 and a second unlocking surface 432. The second unlocking surface is closer to the second push plate 321 than the first unlocking surface 431, and the second unlocking surface is closer to the fixed mold mechanism 100 than the first unlocking surface 431, so that the second unlocking surface 432 is located above the first unlocking surface 431. The first unlocking surface 431 is parallel to the first abutting surface 421, and the second unlocking surface 432 is parallel to the second abutting surface 422; when the first unlocking surface 431 gradually separates from the first abutting surface 421 and the second unlocking surface 432 abuts against the second abutting surface 422, the second driving member 420 gradually moves away from the first driving member 410 until it separates from the first driving member 410.

[0059] See Figure Fig.13 , Fig.14 , Fig.15 and Fig.16 It can be understood that during the synchronous movement of the first push plate 311 and the second push plate 321 relative to the movable mold mechanism 200, since the unlocking member 430 is fixedly connected to the movable mold mechanism 200, the second driving member 420 and the unlocking member 430 generate relative movement along the first direction, so that the first unlocking surface 431 generates a component force along the second direction on the first abutting surface 421, and then the second driving member 420 gradually retracts into the guide hole 3211. When the first unlocking surface 431 is separated from the first abutting surface 421, the second unlocking surface 432 will abut against the second abutting surface 422. At this time, the second driving member 420 can be completely retracted into the guide hole 3211, so that the side wall surface of the groove 4121 is completely separated from the second driving member 420, so that the first driving member 410 can no longer apply a force along the first direction to the second driving member 420, so the first driving member 410 can no longer drive the second driving member 420 to continue to move along the first direction, thereby causing relative movement between the first push plate 311 and the second push plate 321.

[0060] The following describes the working principle of injection mold 10 mold opening:

[0061] In the first step, the movable mold mechanism 200 moves a certain distance away from the fixed mold mechanism 100, and the pop-up elastic member 530 pushes the product 20 to completely separate from the cavity 11 of the fixed mold mechanism 100 through the sliding plate 510 and the fixed mold ejector pin 520, so that the product 20 is located outside the fixed mold mechanism 100. At this time, the product 20 is still in the cavity 11 of the movable mold mechanism 200. The product 20 expands to a certain extent due to the loss of the constraint of the fixed mold mechanism 100, so that the size of the open groove 22 becomes larger, and the matching force and friction between the fixed mold ejector pin 520 and the open groove 22 are reduced. The movable mold mechanism 200 continues to move a certain distance away from the fixed mold mechanism 100, and the product 20 is still in the cavity 11 of the movable mold mechanism 200, that is, the product 20 still moves with the movable mold mechanism 200. At this time, the movable mold mechanism 200 will drive the product 20 to completely separate from the fixed mold ejector pin 520.

[0062] In the second step, the first push plate 311 is moved close to the fixed mold mechanism 100. The first push plate 311 will drive the second push plate 321 to move synchronously through the first driving member 410 and the second driving member 420, so that the first movable mold ejector pin 312 and the second movable mold ejector pin 322 both push the product 20 to separate from the cavity 11 of the movable mold mechanism 200 and be located outside the movable mold mechanism 200. The product 20 expands to a certain extent due to the loss of the constraint of the movable mold mechanism 200, so that the size of the open groove 22 becomes larger, thereby reducing the matching force and friction between the second movable mold ejector pin 322 and the open groove 22.

[0063] In the third step, the first push plate 311 continues to move closer to the fixed mold mechanism 100. At this time, the unlocking member 430 will push the second driving member 420 to retract into the guide hole 3211, so that the first driving member 410 and the second driving member 420 cannot be released. Therefore, the first driving member 410 cannot generate a first-direction abutting force on the second driving member 420. Therefore, during the movement of the first push plate 311 closer to the fixed mold mechanism 100, the first push plate 311 cannot drive the second push plate 321 to move synchronously through the first driving member 410 and the second driving member 420, resulting in the first push plate 311 moving relative to the second push plate 321. At this time, the first movable mold ejector pin 312 will push the second movable mold ejector pin 322 to gradually break away from the mold, and the product 20 will be completely separated from the mold, thus smoothly transferring the product 20.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An injection mold, characterized in that: include: Fixed mold mechanism; A movable mold mechanism, slidably connected to the fixed mold mechanism along a first direction; and The sliding mechanism is slidably arranged with the fixed mold mechanism along the first direction, and the sliding mechanism is used for undercutting the molded product. When the movable mold mechanism slides away from the fixed mold mechanism, the sliding mechanism slides close to the movable mold mechanism to separate the product from the fixed mold mechanism.

2. The injection mold according to claim 1, characterized in that: The sliding mechanism comprises a sliding plate and a fixed mold ejector pin, wherein the fixed mold ejector pin is protrudingly arranged on the sliding plate, the sliding plate is slidably connected to the fixed mold mechanism, and the fixed mold ejector pin is slidably penetrated in the fixed mold mechanism for undercutting of molded products.

3. The injection mold according to claim 2, characterized in that: The fixed mold mechanism is provided with a sliding cavity, and the sliding plate is slidably matched with the sliding cavity.

4. The injection mold according to claim 2, characterized in that: The sliding mechanism further comprises a spring-up elastic member, and the spring-up elastic member abuts between the fixed mold mechanism and the sliding plate.

5. The injection mold according to claim 4, characterized in that: A limiting cavity is provided on the sliding plate and / or the fixed mold mechanism, and the pop-up elastic member is accommodated in the limiting cavity.

6. The injection mold according to claim 4, characterized in that: The pop-up elastic member is a spring.

7. The injection mold according to claim 2, characterized in that: The sliding mechanism further comprises a limiting rod slidably arranged in the fixed mold mechanism, one end of the limiting rod is fixedly connected to the sliding plate, and the other end of the limiting rod can extend out of the fixed mold mechanism.

8. The injection mold according to claim 7, characterized in that: The sliding plate includes a first plate and a second plate that are detachably connected, the first plate and the second plate enclose a fixed cavity and are farther away from the movable mold mechanism than the second plate; the limiting rod includes a first limiting portion and a second limiting portion, the second limiting portion is protrudingly arranged on the first limiting portion, the cross-sectional dimension of the first limiting portion is larger than the cross-sectional dimension of the second limiting portion, the first limiting portion is located in the fixed cavity and sandwiched between the first plate and the second plate, and the second limiting portion is slidably arranged in the fixed mold mechanism.

9. The injection mold according to claim 7, characterized in that: The number of the limiting rods is two, the limiting rods and the fixed mold ejector pins are arranged along a straight line, and the fixed mold ejector pins are located between the two limiting rods.

10. The injection mold according to claim 2, characterized in that: The sliding plate includes a first plate and a second plate that are detachably connected, the first plate and the second plate enclose a fixed cavity and are farther away from the movable mold mechanism than the second plate; the fixed mold ejector includes a first ejector portion and a second ejector portion, the second ejector portion is protrudingly arranged on the first ejector portion, the cross-sectional size of the first ejector portion is larger than the cross-sectional size of the second ejector portion, the first ejector portion is located in the fixed cavity and sandwiched between the first plate and the second plate, and the second ejector portion is penetrated in the second plate.

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