Injection mold

Abstract

The utility model relates to the technical field of injection molding machining, in particular to an injection mold. The injection mold comprises a male mold assembly and a female mold assembly which are matched in a mold closing mode, the male mold assembly comprises a fixing plate, an ejector plate, a jumping middle plate, a male mold plate and a male mold core which are sequentially arranged in the first direction, the injection mold further comprises an angle pin unit, and the angle pin unit comprises an angle pin which is arranged on the male mold plate and the male mold core in a sliding and penetrating mode and arranged in an inclined mode; the pull rod mechanism comprises a connecting assembly and a pull rod assembly, the connecting assembly is fixedly connected to the ejector plate and inserted into the middle jumping plate and the male mold plate, the pull rod assembly is elastically connected with the connecting assembly in the first direction, the end, away from the connecting assembly, of the pull rod assembly is connected with the angle pin, and the pull rod assembly is used for pulling the angle pin to move towards the connecting assembly. According to the injection mold, the stroke of the angle pin can be adaptively adjusted through the pull rod mechanism, and burrs of a product caused by too loose pull rod or breakage of the angle pin caused by too tight pull rod are avoided.

Description

TECHNICAL FIELD

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

[0002] In injection molding products, some reverse buckle structures such as internal buckles and grooves are often designed, which cannot be directly demolded by the conventional ejection mode of the mold. Therefore, a taper pin is arranged in the mold, which can realize the molding of the reverse buckle structure during the opening and closing of the mold through its special movement mode, so as to ensure that the product can be completely molded into the required shape characteristics.

[0003] At present, the taper pin is usually connected with a pull rod, and the pull rod is fixedly arranged in the mold. During the opening and closing of the mold, the taper pin can slide relative to the pull rod. However, in the existing taper pin and pull rod mechanism technology, there are many problems. Since the male mold core, the male mold plate, the ejection plate and the taper pin assembly have cumulative tolerances during processing, the stroke of the taper pin is difficult to accurately control, so that the stroke of the taper pin may be too loose or too tight. When the stroke of the taper pin is too loose, the buckle part of the taper pin will overflow, and then generate burrs, causing poor product quality. If the stroke of the taper pin is designed to be more compact, although the burr problem can be avoided, the service life of the taper pin and the pull rod will be seriously affected, and the taper pin head or the connection between the taper pin and the pull rod will be broken. CONTENT OF THE UTILITY MODEL

[0004] In view of the above, it is necessary to provide an injection mold, which can adaptively adjust the stroke of the taper pin through the pull rod mechanism, and avoid the problems of burrs caused by the loose pull rod and the breakage of the taper pin caused by the tight pull rod.

[0005] The embodiment of the present application provides an injection mold, which comprises a male mold assembly and a female mold assembly matched with each other in closing, the male mold assembly comprises a fixed plate, an ejection plate, a jump center plate, a male mold plate and a male mold core arranged in sequence along a first direction, and the injection mold further comprises a taper pin unit, the taper pin unit comprises a taper pin and a pull rod mechanism, the taper pin is slidably arranged in the male mold plate and the male mold core, and the taper pin is arranged obliquely, the pull rod mechanism comprises a connecting assembly and a pull rod assembly, the connecting assembly is fixedly connected to the ejection plate and is inserted into the jump center plate and the male mold plate, the pull rod assembly is elastically connected to the connecting assembly along the first direction, one end of the pull rod assembly away from the connecting assembly is connected to the taper pin, and the pull rod assembly is used for dragging the taper pin to move towards the connecting assembly.

[0006] The injection mold described above is provided with an inclined pin which can form an undercut structure with the male mold assembly to form corresponding buckle or groove structures after injection. The inclined pin is connected to a pull rod mechanism which includes a connecting assembly and a pull rod assembly. The connecting assembly is fixedly connected to the ejection plate to provide stable support for the pull rod assembly. The pull rod in the pull rod assembly is connected to the inclined pin to provide stable and precise traction for the inclined pin. When the ejection plate is actuated, the force is transmitted to the pull rod through the connecting assembly, and then the pull rod accurately pulls the inclined pin to move, ensuring that the inclined pin moves along the set path and distance, which helps to accurately form the complex structure of the injection molded part. When the mold is closed, the pull rod assembly can drive the inclined pin to move towards the ejection plate, so that the inclined pin is located at the accurate position. When the cumulative tolerance of each part of the injection mold occurs, the elastic cooperation of the connecting assembly and the pull rod assembly can be used for self-adaptive adjustment to prevent the inclined pin from being too tight or too loose, and then effectively avoid the problems of burrs caused by the inclined pin being too loose or the inclined pin being broken caused by the inclined pin being too tight.

[0007] In some embodiments, the connecting assembly is provided with a receiving cavity, the pull rod assembly includes a pull rod, a floating member and a first elastic member, the pull rod is slidingly inserted into the connecting assembly along the first direction, one end of the pull rod is arranged in the receiving cavity, the other end of the pull rod extends out of the connecting assembly and is connected to the inclined pin, the floating member is movably arranged in the receiving cavity and connected to the pull rod, the first elastic member is arranged in the receiving cavity and sleeved on the pull rod, one end of the first elastic member abuts against the upper wall of the receiving cavity, the other end of the first elastic member abuts against the floating member, and the first elastic member is used to push the floating member to drive the pull rod to move away from the male mold core, so that the pull rod drives the inclined pin to move towards the connecting assembly.

[0008] In some embodiments, the connecting assembly includes a housing and a connecting block, the housing is inserted into the middle plate and the male mold plate, the receiving cavity is opened in the housing, the pull rod is slidingly inserted into the housing, the connecting block is connected to one end of the housing away from the inclined pin, and the connecting block is connected to the ejection plate; one end of the housing close to the connecting block is provided with a limiting groove, the limiting groove is opened in the inner wall of the receiving cavity, the floating member is movably arranged in the limiting groove, the width of the limiting groove along the first direction is greater than the thickness of the floating member along the first direction, and the limiting groove is used to limit the floating member in the first direction.

[0009] In some embodiments, the pull rod assembly further includes a second elastic member, the second elastic member is arranged between the floating member and the connecting block, and the two ends of the second elastic member abut against the floating member and the connecting block respectively, and the second elastic member is used to push the floating member to move away from the connecting block.

[0010] In some embodiments, the elastic force of the first elastic element is greater than the elastic force of the second elastic element.

[0011] In some embodiments, the difference between the width of the limiting groove along the first direction and the thickness of the floating member along the first direction is in the range of 0.04mm to 0.2mm.

[0012] In some embodiments, the connecting block has a receiving groove on one side abutting against the second elastic member, the receiving groove being used to receive the second elastic member.

[0013] In some embodiments, the connecting assembly further includes a connecting rod, one end of which is fixedly connected to the top plate, and the other end of which is connected to the connecting block. The connecting rod is used to connect the connecting block and the top plate.

[0014] In some embodiments, a snap-fit ​​groove is provided on the side of the connecting block that is connected to the connecting rod, and a snap-fit ​​protrusion is provided on the end of the connecting rod that is connected to the connecting block. The snap-fit ​​protrusion snaps into the snap-fit ​​groove, thereby connecting the connecting block and the connecting rod.

[0015] In some embodiments, one end of the pull rod connected to the inclined pin is provided with a sliding groove extending in a second direction, and one end of the inclined pin connected to the pull rod is provided with a sliding protrusion adapted to the sliding groove. The sliding protrusion is provided in the sliding groove and can slide in the second direction; wherein, the second direction is perpendicular to the first direction, and the second direction, the first direction, and the extension direction of the inclined pin are in the same plane. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of the injection mold provided in the embodiments of this application.

[0017] Figure 2 for Figure 1 An enlarged schematic diagram of position II of the injection mold shown.

[0018] Figure 3 for Figure 2 An enlarged schematic diagram of position III of the injection mold shown.

[0019] Figure 4 for Figure 1 The diagram shows an exploded view of the inclined pin unit of the injection mold.

[0020] Explanation of main component symbols: Injection mold 100, male mold assembly 10, fixed plate 11, ejector plate 12, mid-mount plate 13, male mold plate 14, male mold core 15, female mold assembly 20, inclined pin unit 30, inclined pin 31, sliding protrusion 311, limiting protrusion 312, tie rod mechanism 32, connecting assembly 321, receiving cavity 3211, shell 3212, limiting groove 3212a, connecting block 3213, receiving groove 3213a, snap-fit ​​groove 3213b, connecting rod 3214, snap-fit ​​protrusion 3214a, tie rod assembly 322, tie rod 3221, sliding slot 3221a, floating part 3222, first elastic part 3223, second elastic part 3224. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] The embodiments of this application will be further described below with reference to the accompanying drawings. To facilitate understanding and explanation of the embodiments of this application, a three-dimensional coordinate system is established in some of the drawings, with the Z-axis direction as the first direction and the X-axis direction as the second direction, and the X-axis direction being perpendicular to the Z-axis direction.

[0025] Please see Figure 1 , Figure 2 and Figure 3 This application provides an injection mold 100, including a male mold assembly 10 and a female mold assembly 20 for mold closing and adaptation. The male mold assembly 10 includes a fixed plate 11, an ejector plate 12, a center plate 13, a male mold plate 14, and a male mold core 15 arranged sequentially along the Z-axis. After the male mold assembly 10 and the female mold assembly 20 are closed, they are used for injection molding of products (not shown in the figure). The injection mold 100 also includes a slanted pin unit 30, which includes a slanted pin 31 and a tie rod mechanism 32.

[0026] Specifically, the inclined pin 31 slides through the male mold plate 14 and the male mold core 15, and the inclined pin 31 is inclined. The inclined pin 31 is roughly rod-shaped. The inclined pin 31 can form the undercut structure in the injection mold 100, ensuring that the product has a complete shape that conforms to the design. During the demolding stage, the inclined pin 31 moves on its own to help the part with the undercut structure to be smoothly removed from the injection mold 100, avoiding damage to the product.

[0027] The lever mechanism 32 includes a connecting component 321 and a lever assembly 322. The connecting component 321 is fixedly connected to the top plate 12 and inserted into the middle plate 13 and the template 14. The lever assembly 322 is elastically connected to the connecting component 321 along the Z-axis. The end of the lever assembly 322 away from the connecting component 321 is connected to the inclined pin 31. The lever assembly 322 is used to pull the inclined pin 31 toward the connecting component 321.

[0028] The injection mold 100 provided in this embodiment is provided with a slanted pin 31. The slanted pin 31 can cooperate with the male mold assembly 10 to form an undercut structure, so as to form a corresponding snap or groove structure after injection molding. The slanted pin 31 is connected to the tie rod mechanism 32. The tie rod mechanism 32 includes a connecting assembly 321 and a tie rod assembly 322. The connecting assembly 321 is fixedly connected to the ejector plate 12, providing stable support for the tie rod assembly 322. The tie rod 3221 in the tie rod assembly 322 is connected to the slanted pin 31, which can provide a stable and precise traction force to the slanted pin 31. When the ejector plate 12 moves, the force is transmitted to the tie rod 3221 through the connecting assembly 321, thereby accurately pulling the slanted pin 31 to move, ensuring that the slanted pin 31 moves according to the set path and distance, which helps to achieve precise molding of complex structures of injection molded parts. When the mold is closed, the tie rod assembly 322 can drive the slanted pin 31 to move towards the ejector plate 12, so that the slanted pin 31 is in an accurate position. When cumulative tolerances occur in the various components of the injection mold 100, adaptive adjustment can be made through the elastic fit of the connecting component 321 and the tie rod component 322 to prevent the oblique pin 31 from being too tight or too loose. This effectively avoids the problem of the oblique pin 31 breaking due to being too loose or too tight.

[0029] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The connecting assembly 321 is provided with a receiving cavity 3211. The pull rod assembly 322 includes a pull rod 3221, a floating member 3222, and a first elastic member 3223. The pull rod 3221 is slidably inserted into the connecting assembly 321 along the Z-axis direction, with one end of the pull rod 3221 disposed in the receiving cavity 3211 and the other end of the pull rod 3221 extending out of the connecting assembly 321 and connected to the inclined pin 31. The floating member 3222 is movably disposed in the receiving cavity 3211 and connected to the pull rod 3221. 21 connection, the first elastic element 3223 is disposed in the receiving cavity 3211 and sleeved on the pull rod 3221. One end of the first elastic element 3223 abuts against the upper wall of the receiving cavity 3211, and the other end of the first elastic element 3223 abuts against the floating element 3222. The first elastic element 3223 is used to push the floating element 3222 and thereby drive the pull rod 3221 away from the male mold core 15 so that the pull rod 3221 pulls the inclined pin 31 toward the connecting assembly 321.

[0030] The tie rod 3221 can be a columnar structure, and the floating component 3222 can be a block structure. In this embodiment, both the tie rod 3221 and the floating component 3222 are cylindrical, and the cross-sectional area of ​​the floating component 3222 is larger than that of the tie rod 3221. The tie rod 3221 and the floating component 3222 are fixedly connected by bolts or the like. The first elastic component 3223 can be an elastic structure such as a spring. The first elastic component 3223 can push the floating component 3222 downward along the Z-axis, thereby driving the tie rod 3221 downward. The tie rod 3221 applies a downward force to the inclined pin 31. By setting the tie rod mechanism 32, the movement of the inclined pin 31 can be precisely controlled. After mold closing, the inclined pin 31 can be pulled to the correct position, facilitating the injection molding of the product. When cumulative machining tolerances occur in various parts of the injection mold 100, after mold closing, when the inclined pin 31 is pulled by the tie rod 3221, the first elastic element 3223 and the floating element 3222 cooperate—that is, the first elastic element 3223 pushes the floating element 3222 away from the male mold core 15 or the floating element 3222 compresses the first elastic element 3223—to automatically adjust the stroke of the tie rod 3221 pulling the inclined line, thereby compensating for the cumulative tolerances. This avoids the inclined pin 31 being too loose or too tight.

[0031] In some embodiments, see Figure 1 and Figure 2 and Figure 4The connecting assembly 321 includes a housing 3212 and a connecting block 3213. The housing 3212 is inserted into the jumping plate 13 and the male template 14. The receiving cavity 3211 is formed in the housing 3212. The pull rod 3221 is slidably inserted into the housing 3212. The connecting block 3213 is connected to the end of the housing 3212 away from the inclined pin 31 and is connected to the ejector plate 12. A limiting groove 3212a is provided at the end of the housing 3212 near the connecting block 3213. The limiting groove 3212a is formed in the inner wall of the receiving cavity 3211. The floating member 3222 is movably disposed in the limiting groove 3212a. The width of the limiting groove 3212a along the Z-axis is greater than the thickness of the floating member 3222 along the Z-axis. The limiting groove 3212a is used to limit the floating member 3222 in the Z-axis direction.

[0032] The housing 3212 can be a cuboid structure to improve its stability within the jump plate 13 and the male template 14, preventing rotation. The separate design of the housing 3212 and the connecting block 3213 facilitates the installation of the tie rod 3221, the floating component 3222, and the first elastic component 3223 within the receiving cavity 3211. By providing a limiting groove 3212a, it is ensured that the floating component 3222 can only move along the Z-axis within the receiving cavity 3211, preventing unnecessary displacement or swaying in other directions. This ensures that the tie rod 3221 can stably drive the inclined pin 31 under the action of the first elastic component 3223. The width of the limiting groove 3212a along the Z-axis is greater than the thickness of the floating component 3222 along the Z-axis, providing space for the floating component 3222's movement. The floating component 3222 can be appropriately positioned within the limiting groove 3212a, thus preventing the inclined pin 31 from being too tight or too loose after mold closing. The limiting groove 3212a can also limit the floating part 3222 in the Z-axis direction to prevent the floating part 3222 from moving too much, which would cause the position error of the inclined pin 31 to be large and result in defective injection molded products.

[0033] In some embodiments, see Figure 2 , Figure 3 and Figure 4 The pull rod assembly 322 also includes a second elastic element 3224, which is disposed between the floating element 3222 and the connecting block 3213. Both ends of the second elastic element 3224 abut against the floating element 3222 and the connecting block 3213, respectively. The second elastic element 3224 is used to push the floating element 3222 away from the connecting block 3213. The second elastic element 3224 can be a disc spring; by providing the second elastic element 3224, an upward elastic force can be applied to the floating element 3222.

[0034] When the position of the inclined pin 31 is higher than the standard position after the mold is closed, the second elastic element 3224 can elastically support the floating element 3222. When the mold is opened, the ejector plate 12 drives the connecting component 321 to move upward. The second elastic element 3224 can push the floating element 3222 to move upward synchronously with the connecting component 321, thereby driving the inclined pin 31 to move upward synchronously. The inclined pin 31 can synchronously drive the molding structure in the male mold core 15 to retract from the molded product in the horizontal direction, ensuring the consistency of the mold opening process and preventing the inclined pin 31 from damaging the molded product during the mold opening process.

[0035] The second elastic element 3224 can also act as a buffer. When the tie rod 3221 is subjected to external force, the second elastic element 3224 can absorb part of the impact force, preventing the impact force from being directly transmitted to other parts of the mold, thereby reducing the wear and damage of the parts and extending the service life of the injection mold 100.

[0036] In some embodiments, see Figure 2 and Figure 3 The elastic force of the first elastic element 3223 is greater than that of the second elastic element 3224. This ensures that the first elastic element 3223 pushes against the floating element.

[0037] In some embodiments, see Figure 2 and Figure 3 The difference between the width of the limiting groove 3212a along the Z-axis and the thickness of the floating part 3222 along the Z-axis ranges from 0.04 mm to 0.2 mm. The difference between the width of the limiting groove 3212a along the Z-axis and the thickness of the floating part 3222 along the Z-axis can be 0.04 mm, 0.06 mm, 0.08 mm, 0.1 mm, 0.12 mm, 0.14 mm, 0.16 mm, 0.18 mm, 0.2 mm, etc. When the difference is between 0.04 mm and 0.2 mm, the limiting groove 3212a provides sufficient space for the floating part 3222 to move, thus allowing the adjustable range of the inclined pin 31 in the Z-axis direction to be between 0.04 mm and 0.2 mm. This allows for adaptive adjustment when cumulative tolerances occur in the various structures of the mold assembly 10, preventing the inclined pin 31 from being too tight or too loose after mold closing. If the difference is less than 0.04mm, the adjustable range of the inclined pin 31 will be too small, which will cause the inclined pin 31 to be too tight when the mold is closed. If the difference is greater than 0.2mm, the adjustable range of the inclined pin 31 will be too large, which will cause the inclined pin 31 to be too loose when the mold is closed, which will result in burrs on the injection molded product.

[0038] In this embodiment, when the inclined pin 31 is not subjected to external force, the pull rod 3221 and the floating member 3222 are not subjected to the force of the inclined pin 31. At this time, the first elastic member 3223 and the second elastic member 3224 cooperate to resist the floating member 3222, so that the floating member 3222 is located in the middle of the limiting groove 3212a along the Z-axis. At this time, the distance between the upper surface of the floating member 3222 and the upper groove wall of the corresponding limiting groove 3212a is 0.02mm to 0.1mm, and the distance between the lower surface of the floating member 3222 and the connecting block 3213 is 0.02mm to 0.1mm. Thus, when the mold is closed, the floating member 3222 can move up or down relative to the limiting groove 3212a, so that the inclined pin 31 can be adaptively adjusted by the pull rod 3221 when the inclined pin 31 is too tight or too loose.

[0039] In some embodiments, see Figure 2 and Figure 4 The connecting block 3213 has a receiving groove 3213a on one side of the second elastic member 3224, which is used to receive the second elastic member 3224. By setting the receiving groove 3213a, the stability of the second elastic member 3224 can be improved, the second elastic member 3224 can be prevented from shifting, and thus the support stability of the floating member 3222 can be improved.

[0040] In some embodiments, see Figure 1 and Figure 2 The connecting assembly 321 also includes a connecting rod 3214. One end of the connecting rod 3214 is fixedly connected to the ejector plate 12, and the other end is connected to the connecting block 3213. The connecting rod 3214 is used to connect the connecting block 3213 and the ejector plate 12. The connecting rod 3214 can be a rod-shaped structure. By setting the connecting rod 3214, the connecting block 3213 and the ejector plate 12 can be connected. During the assembly process of the injection mold 100, the connecting rod 3214 facilitates the connection between the connecting block 3213 and the ejector plate 12. The installer can first fix one end of the connecting rod 3214 to the ejector plate 12, and then connect the connecting block 3213 to the other end of the connecting rod 3214. This step-by-step installation method is relatively simple and direct, reducing the installation difficulty and operational complexity, and improving the assembly efficiency of the injection mold 100. At the same time, the standardized design and connection method of the connecting rod 3214 also facilitates batch assembly during the mold production process, which is conducive to improving production efficiency and reducing production costs.

[0041] In some embodiments, see Figure 2 and Figure 4The connecting block 3213 has a snap-fit ​​groove 3213b on the side where it connects to the connecting rod 3214, and a snap-fit ​​protrusion 3214a on the end where it connects to the connecting block 3213. The snap-fit ​​protrusion 3214a snaps into the snap-fit ​​groove 3213b, thus connecting the connecting block 3213 and the connecting rod 3214. The cross-section of the snap-fit ​​groove 3213b can be T-shaped, and the cross-section of the snap-fit ​​protrusion 3214a is a T-shape that matches the snap-fit ​​groove 3213b. The engagement of the snap-fit ​​groove 3213b and the snap-fit ​​protrusion 3214a enables precise positioning and connection between the connecting block 3213 and the connecting rod 3214. During the assembly process of the injection mold 100, this tight snap-fit ​​structure ensures that the connecting rod 3214 is accurately inserted into the predetermined position of the connecting block 3213, avoiding problems such as offset or misalignment during the connection process. During the assembly of the injection mold 100, the snap-fit ​​structure makes the connection between the connecting block 3213 and the connecting rod 3214 simpler and faster. The assembly worker only needs to align the snap-fit ​​protrusion 3214a at one end of the connecting rod 3214 with the snap-fit ​​groove 3213b on the connecting block 3213, and then push the snap-fit ​​protrusion 3214a into the snap-fit ​​groove 3213b to complete the connection. There is no need for complicated thread tightening or welding operations, which shortens the assembly time and improves the assembly efficiency of the injection mold 100.

[0042] In some embodiments, see Figure 2 and Figure 4 The end of the pull rod 3221 connected to the inclined pin 31 has a sliding groove 3221a extending along the X-axis. The end of the inclined pin 31 connected to the pull rod 3221 has a sliding protrusion 311 adapted to the sliding groove 3221a. The sliding protrusion 311 is located in the sliding groove 3221a and can slide along the X-axis. The X-axis, Z-axis, and the extension direction of the inclined pin 31 are all in the same plane. The sliding groove 3221a can be a T-shaped groove or a dovetail groove, and the sliding protrusion 311 can be a T-shaped protrusion or a dovetail protrusion adapted to the sliding groove 3221a. The sliding groove 3221a and the sliding protrusion 311 work together to allow the tie rod 3221 and the inclined pin 31 to slide together. During mold opening, the tie rod 3221 moves along the Z-axis, and the inclined pin 31 moves along its extension direction. The angle between the extension direction of the inclined pin 31 and the Z-axis is acute. Therefore, the movement direction of the inclined pin 31 can be decomposed into two directions: the X-axis and the Z-axis. The sliding groove 3221a and the sliding protrusion 311 allow the inclined pin 31 to move relative to the tie rod 3221 in the X-axis direction, preventing the tie rod 3221 from jamming the inclined pin 31 and preventing it from moving.

[0043] In some embodiments, see Figure 2 and Figure 4A limiting protrusion 312 is provided at the end of the inclined pin 31 away from the tie rod 3221. The limiting protrusion 312 is used to abut against the male mold core 15 to limit the tie rod 3221. The limiting protrusion 312 can extend along the X-axis direction. During the mold closing process, the tie rod 3221 pulls the inclined pin 31 to move downward. By setting the limiting protrusion 312, the downward movement distance of the inclined pin 31 can be limited to avoid excessive movement of the inclined pin 31, which would affect the injection molding.

[0044] The working process of the injection mold 100 provided in this embodiment is roughly as follows:

[0045] First, the male mold assembly 10 and the female mold assembly 20 close. The ejector plate 12 drives the connecting rod 3214 away from the male mold plate 14. The connecting rod 3214, through the connecting block 3213, pulls the housing 3212 away from the male mold plate 14. The first elastic element 3223 pushes against the floating element 3222, thereby driving the pull rod 3221 away from the male mold plate 14. The pull rod 3221 pulls the inclined pin 31 downward, completing the mold closing. During mold closing, the first elastic element 3223 and the second elastic element 3224 cooperate to appropriately adjust the position of the floating element 3222 in the Z-axis direction. This, in turn, adjusts the position of the inclined pin 31 through the pull rod 3221, preventing the inclined pin 31 from being too tight or too loose, ensuring that the inclined pin 31 is in a suitable position, which is beneficial to improving the quality of the molded product.

[0046] When the mold is opened, the ejector plate 12 drives the connecting block 3213 and the box body to move toward the male mold plate 14 through the connecting rod 3214. The first elastic element 3223 and the second elastic element 3224 cooperate to push the floating block along with the connecting block 3213 and the box body. The pull rod 3221 pushes the inclined pin 31 to move. The inclined pin 31 moves along its extension direction, which helps to disengage the undercut and other structures that cooperate with it on the molded product from the male mold core 15 and other parts, making it convenient for the molded product to be ejected in the future.

[0047] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. An injection mold, comprising a male mold assembly and a female mold assembly for mold closing and adaptation, wherein the male mold assembly includes a fixing plate, an ejector plate, a center plate, a male mold plate, and a male mold core arranged sequentially along a first direction, characterized in that, The injection mold further includes a slanted pin unit, the slanted pin unit comprising: A slanted pin is slidably disposed between the male mold plate and the male mold core, and the slanted pin is inclined. A pull rod mechanism includes a connecting component and a pull rod assembly. The connecting component is fixedly connected to the top plate and inserted into the jumping plate and the male template. The pull rod assembly is elastically connected to the connecting component along the first direction. One end of the pull rod assembly away from the connecting component is connected to the inclined pin. The pull rod assembly is used to pull the inclined pin toward the connecting component.

2. The injection mold as described in claim 1, characterized in that, The connecting assembly is provided with a receiving cavity. The pull rod assembly includes a pull rod, a floating member, and a first elastic member. The pull rod is slidably inserted into the connecting assembly along the first direction, with one end of the pull rod disposed in the receiving cavity and the other end of the pull rod extending out of the connecting assembly and connected to the inclined pin. The floating member is movably disposed in the receiving cavity and connected to the pull rod. The first elastic member is disposed in the receiving cavity and sleeved on the pull rod. One end of the first elastic member abuts against the upper wall of the receiving cavity, and the other end of the first elastic member abuts against the floating member. The first elastic member is used to push against the floating member, thereby driving the pull rod away from the male mold core, so that the pull rod pulls the inclined pin toward the connecting assembly.

3. The injection mold as described in claim 2, characterized in that, The connecting assembly includes a housing and a connecting block. The housing is inserted into the jumping plate and the male template. The receiving cavity is opened in the housing. The pull rod is slidably inserted into the housing. The connecting block is connected to the end of the housing away from the inclined pin. The connecting block is connected to the top plate. A limiting groove is provided at one end of the housing near the connecting block. The limiting groove is formed on the inner wall of the accommodating cavity. The floating member is movably disposed in the limiting groove. The width of the limiting groove along the first direction is greater than the thickness of the floating member along the first direction. The limiting groove is used to limit the floating member in the first direction.

4. The injection mold as described in claim 3, characterized in that, The pull rod assembly further includes a second elastic element, which is disposed between the floating element and the connecting block, and the two ends of the second elastic element abut against the floating element and the connecting block respectively. The second elastic element is used to push the floating element away from the connecting block.

5. The injection mold as described in claim 4, characterized in that, The elastic force of the first elastic element is greater than that of the second elastic element.

6. The injection mold as described in claim 5, characterized in that, The difference between the width of the limiting groove along the first direction and the thickness of the floating part along the first direction is in the range of 0.04mm to 0.2mm.

7. The injection mold as described in claim 4, characterized in that, The connecting block has a receiving groove on one side that abuts against the second elastic member, and the receiving groove is used to receive the second elastic member.

8. The injection mold as described in claim 3, characterized in that, The connecting assembly further includes a connecting rod, one end of which is fixedly connected to the top plate, and the other end of which is connected to the connecting block. The connecting rod is used to connect the connecting block and the top plate.

9. The injection mold as described in claim 8, characterized in that, The connecting block is provided with a snap-fit ​​groove on the side where it connects to the connecting rod, and a snap-fit ​​protrusion is provided at the end where it connects to the connecting block. The snap-fit ​​protrusion snaps into the snap-fit ​​groove, thereby connecting the connecting block and the connecting rod.

10. The injection mold as described in claim 2, characterized in that, The end of the pull rod connected to the inclined pin has a sliding groove extending in the second direction, and the end of the inclined pin connected to the pull rod has a sliding protrusion adapted to the sliding groove. The sliding protrusion is located in the sliding groove and can slide in the second direction. The second direction is perpendicular to the first direction, and the second direction, the first direction, and the extension direction of the inclined pin are all in the same plane.

Images