Injection mold for integrally forming embedded nut

Abstract

The invention provides a pre-embedded nut integrated injection mold which comprises an upper mold plate and a lower mold plate, an upper mold core is fixed in the upper mold plate, and a lower mold core is fixed in the lower mold plate; the lower mold core is slidably connected with a sliding assembly and an inclined guide column, and the inclined guide column sequentially penetrates through the sliding assembly and the lower mold core; the top of the sliding assembly is movably connected with a nut feeding piece, and the nut feeding piece is used for fixing a first nut insert in an injection molding product. A plurality of column grooves are formed between the upper mold core and the lower mold core side by side, the column grooves communicate with forming cavities, abutting columns are embedded into the column grooves in a matched mode, and the abutting columns extend to the forming cavities and abut against the first nut inserts. The sliding assembly is driven by the inclined guide column to drive the nut feeding piece to move, and the effects of automatically withdrawing during mold opening and reducing product damage are achieved.

Description

Technical Field

[0001] This application relates to injection molding technology, specifically to an injection mold for integrally molding a pre-embedded nut. Background Technology

[0002] Nut injection molding is a process for manufacturing plastic products with nuts. The principle is to pre-fix the nut insert in a specific position in the mold cavity before injection molding, and then inject high-temperature plastic. During the cooling process of the plastic, the plastic and the outer surface of the nut are tightly bonded, so that the nut has high torsional strength and tensile strength. Finally, a product with internal threads is formed on the plastic part. This allows the injection molding and nut insertion to be completed simultaneously, improving production efficiency, reducing subsequent assembly processes, and enhancing the structural strength and functionality of the product.

[0003] In existing technologies, the nut insert is prone to sticking or getting stuck to the mold during demolding, which makes demolding difficult and may even damage the product surface or internal structure. In addition, the nut is prone to displacement under injection pressure, which affects product quality and thread fit accuracy. Summary of the Invention

[0004] In view of the aforementioned problems, this application is made to provide an injection mold for integrally molding a pre-embedded nut, which overcomes or at least partially solves the aforementioned problems, including an upper mold plate and a lower mold plate, wherein an upper mold core is fixed inside the upper mold plate and a lower mold core is fixed inside the lower mold plate; The lower mold core is slidably connected to a sliding assembly and an inclined guide post, and the inclined guide post passes through the sliding assembly and the lower mold core in sequence; The top of the sliding assembly is movably connected to a nut feeder, which is used to fix the first nut insert inside the injection molded product. A plurality of column grooves are provided side by side between the upper mold core and the lower mold core. The column grooves are connected to the molding cavity. An abutment post is fitted inside the column groove and extends to the molding cavity and abuts against the first nut insert.

[0005] Preferably, it also includes a clamping mechanism, which includes a fixed plate and a pressure plate. A feeding assembly is slidably disposed between the fixed plate and the pressure plate, and a plurality of second nut inserts are engaged at the end of the feeding assembly away from the pressure plate.

[0006] Preferably, a plurality of mounting members are fixedly inserted inside the upper mold core, and the mounting members extend out of the upper mold core and into the molding cavity; When the second nut insert is inserted into the molding cavity through the clamping mechanism, the fixing plate is engaged with the surface of the upper mold core, and the second nut insert corresponds one-to-one with the molding cavity; When the pressure plate is pressed down to its limit position in the direction of approaching the forming cavity, the feeding assembly drives the nut insert to be sleeved on the outer wall of the mounting part.

[0007] Preferably, the sliding assembly includes a sliding seat, and a rectangular groove is formed at one end of the top of the sliding seat near the molding cavity; The nut feeder includes a housing, which is adapted to snap into the interior of the rectangular groove. Several fixing posts are arranged in parallel inside the housing, and the fixing posts are coaxially and correspondingly arranged with the abutment posts.

[0008] Preferably, one end of the fixing post is fixed to the inner wall of the housing, the other end of the fixing post extends through the housing and into the molding cavity, and the fixing post is adapted to be inserted into the interior of the first nut insert.

[0009] Preferably, the bottom of the sliding seat is provided with a through groove, and a pin is inserted inside the through groove; the bottom of the housing is provided with a through hole. When the sliding seat slides to its limit position away from the molding cavity, the through groove communicates with the through hole.

[0010] Preferably, positioning holes are provided on both sides of the upper template, and positioning posts are fixedly connected to both ends of the fixing plate; When the fixing plate is snapped onto the surface of the upper mold core, the positioning pin is adapted to fit into the interior of the positioning hole.

[0011] Preferably, the feeding assembly includes a plurality of push rods arranged in parallel, one end of each push rod being fixedly connected to the side of the pressure plate facing the fixed plate, and the other end of each push rod passing through the fixed plate and engaging with the second nut insert.

[0012] Preferably, the outer wall of the push rod is fixedly fitted with a limiting sleeve, and the limiting sleeve is fixedly connected to the pressure plate; When the pressure plate moves to its limit position towards the fixed plate, the end of the limiting sleeve near the fixed plate abuts against the surface of the fixed plate.

[0013] Preferably, a spring is sleeved on the outer wall of the push rod, and the spring is fixedly connected to the pressure plate. When the pressure plate moves toward the fixed plate, the spring is in a compressed state.

[0014] This application has the following advantages: In the embodiments of this application, in contrast to the shortcomings of the prior art where "the nut insert is prone to sticking and jamming during demolding, and the positioning accuracy is insufficient, leading to displacement", this application provides a solution that "achieves precise positioning and convenient demolding by driving with a sliding component and an inclined guide post, and combining the cooperative action of an abutment post and a fixed post". Specifically, it is a pre-embedded nut integrally formed injection mold, including an upper mold plate and a lower mold plate. An upper mold core is fixed inside the upper mold plate, and a lower mold core is fixed inside the lower mold plate. The lower mold core is slidably connected to a sliding component and an inclined guide post, and the inclined guide post passes through the sliding component and the lower mold core in sequence. A nut feeding component is movably connected to the top of the sliding component, and the nut feeding component is used to fix the first nut insert inside the injection molded product. A plurality of column grooves are opened in parallel between the upper mold core and the lower mold core. The column grooves communicate with a molding cavity. An abutment post is fitted inside the column groove and extends to the molding cavity and abuts against the first nut insert. By using inclined guide pillars to drive the sliding assembly to move the nut feeder, the problem of the nut insert easily sticking and getting stuck in the mold during demolding is solved, achieving the effects of automatic withdrawal during mold opening, smooth demolding, and reduced product damage. By using a coaxial bidirectional limiting structure in which the fixing pillar is inserted into the first nut insert and the abutting pillar abuts against the end face of the first nut insert in the molding cavity, the problems of insufficient nut positioning accuracy and easy displacement under injection pressure are solved, achieving the effects of stable nut insert position and high thread fit accuracy during injection molding. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the lower template of an injection mold for integrally molding a pre-embedded nut, provided in one embodiment of this application; Figure 2 This is a schematic diagram of the upper template of an injection mold for integrally molding a pre-embedded nut, provided in one embodiment of this application; Figure 3 This is a schematic diagram of the upper mold core of an injection mold for integrally molding a pre-embedded nut, provided in one embodiment of this application; Figure 4 This is an embodiment provided by this application. Figure 3 A schematic diagram of the local structure of region A; Figure 5 This is a schematic diagram of the lower mold core of an injection mold for integrally molding a pre-embedded nut, provided in one embodiment of this application; Figure 6This is an embodiment provided by this application. Figure 5 A schematic diagram of the local structure of region B; Figure 7 This is a schematic diagram of a sliding component of an injection mold for integrally molding a pre-embedded nut, provided in one embodiment of this application; Figure 8 This is a schematic diagram from another angle of a sliding component of an injection mold for integrally molding a pre-embedded nut, provided in one embodiment of this application; Figure 9 This is a schematic diagram of the clamping mechanism of an injection mold for integrally molding a pre-embedded nut, provided in one embodiment of this application; Figure 10 This is a schematic diagram of the feeding component of an injection mold for integrally forming a pre-embedded nut, provided in one embodiment of this application.

[0017] The reference numerals in the accompanying drawings are as follows: 100. Upper template; 110. Upper mold core; 111. Mounting component; 120. Positioning hole; 200. Lower template; 210. Lower mold core; 220. Limiting post; 300. Sliding assembly; 310. Sliding seat; 311. Through slot; 312. Ejector pin; 313. Limiting groove; 314. Guide block; 320. Rectangular groove; 321. Guide post; 400. Angled guide post; 500. Nut feeder; 510. First nut insert; 520, housing; 530, fixing post; 600, post groove; 610, abutting post; 700, forming cavity; 800, clamping mechanism; 810, fixing plate; 811, positioning post; 820, pressure plate; 830, feeding assembly; 831, push rod; 832, bushing; 833, limiting sleeve; 834, spring; 840; Second nut insert; 850, connecting post; 851, stop part. Detailed Implementation

[0018] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] The inventors discovered through analysis of existing technologies that the nut insert is prone to sticking or getting stuck with the mold during demolding, which makes demolding difficult and may even damage the surface or internal structure of the product. Furthermore, the nut is prone to shifting under injection pressure, affecting product quality and thread fit accuracy.

[0020] Reference Figure 1 and Figure 2This application shows an embodiment of an injection mold for integrally forming a pre-embedded nut, including an upper mold plate 100 and a lower mold plate 200. An upper mold core 110 is fixed inside the upper mold plate 100, and a lower mold core 210 is fixed inside the lower mold plate 200. The lower mold core 210 is slidably connected to a sliding assembly 300 and an inclined guide post 400, and the inclined guide post 400 passes through the sliding assembly 300 and the lower mold core 210 in sequence. The top of the sliding assembly 300 is movably connected to a nut feeder 500, which is used to fix the first nut insert 510 inside the injection molded product. A plurality of column grooves 600 are provided side by side between the upper mold core 110 and the lower mold core 210. The column grooves 600 are connected to the molding cavity 700. An abutment post 610 is fitted inside the column groove 600. The abutment post 610 extends to the molding cavity 700 and abuts against the first nut insert 510.

[0021] In the embodiments of this application, in contrast to the shortcomings of the prior art where "the nut insert is prone to sticking and jamming during demolding, and the positioning accuracy is insufficient, leading to displacement," this application provides a solution that "achieves precise positioning and convenient demolding by driving the sliding component 300 and the inclined guide post 400, and combining the cooperative action of the abutment post 610 and the fixed post 530." Specifically, it is a pre-embedded nut integrally formed injection mold, including an upper mold plate 100 and a lower mold plate 200. An upper mold core 110 is fixed inside the upper mold plate 100, and a lower mold core 210 is fixed inside the lower mold plate 200. The lower mold core 210 is slidably connected to... The sliding assembly 300 and the inclined guide post 400 pass sequentially through the sliding assembly 300 and the lower mold core 210. A nut feeder 500 is movably connected to the top of the sliding assembly 300. The nut feeder 500 is used to fix the first nut insert 510 inside the injection molded product. A plurality of column grooves 600 are provided side by side between the upper mold core 110 and the lower mold core 210. The column grooves 600 communicate with the molding cavity 700. An abutment post 610 is fitted inside the column groove 600. The abutment post 610 extends to the molding cavity 700 and abuts against the first nut insert 510. The inclined guide post 400 drives the sliding assembly 300 to move the nut feeder 500, which solves the problem of the nut insert sticking and getting stuck in the mold during demolding. It achieves the effects of automatic withdrawal when the mold is opened, smooth demolding, and reduced product damage. The coaxial bidirectional limiting structure, in which the fixing post 530 is inserted into the first nut insert 510 and the abutting post 610 abuts against the end face of the first nut insert 510 in the molding cavity 700, solves the problems of insufficient nut positioning accuracy and easy displacement under injection pressure. It achieves the effects of stable nut insert position and high thread fit accuracy during injection.

[0022] The following will further describe an injection mold for integrally molding a pre-embedded nut in this exemplary embodiment.

[0023] Reference Figure 5-8 In one embodiment of this application, the sliding assembly 300 includes a sliding seat 310, and a rectangular groove 320 is provided at one end of the top of the sliding seat 310 near the molding cavity 700. The nut feeder 500 includes a housing 520, which is adapted to be snapped into the interior of the rectangular groove 320. A plurality of fixing posts 530 are arranged in parallel inside the housing 520, and the fixing posts 530 are coaxially and correspondingly arranged with the abutment posts 610.

[0024] It should be noted that the rectangular groove 320, as a standard mounting base, provides a precise positioning and accommodating space. The housing 520 is fixed within the rectangular groove 320 via a snap-fit ​​mechanism, enabling quick and accurate positioning and convenient assembly / disassembly between the nut feeder 500 and the sliding seat 310. The housing 520, as the main load-bearing structure, integrates multiple fixing posts 530. The positions of these fixing posts 530 are coaxially aligned with the abutment posts 610 on the lower mold core 210, forming the basis for bidirectional positioning of the first nut insert 510. The fixing posts 530 are inserted into the inner hole of the first nut insert 510 for radial positioning, while the abutment posts 610 abut against the end face of the nut insert from the other end for axial limiting. This coaxial alignment allows the first nut insert 510 to resist melt pressure during injection molding, preventing displacement or floating, thereby improving the thread fit accuracy of the product.

[0025] Reference Figure 1 and Figure 8 In one embodiment of this application, a limiting groove 313 is provided on the side of the sliding seat 310 away from the molding cavity 700, and a limiting post 220 is fixedly connected to the surface of the lower template 200. When the sliding seat 310 slides to its limit position away from the molding cavity 700, the limiting post 220 is fitted into the inside of the limiting groove 313.

[0026] It should be noted that during the mold opening process, the sliding seat 310 retracts, and when it reaches the predetermined end point of the stroke, the limiting post 220 is precisely embedded in the limiting groove 313. This mechanical hard limiting method can precisely control the retraction distance of the sliding component 300, preventing it from retracting excessively and disengaging from the working position or interfering with other parts of the mold, thus ensuring the reliability of the mechanism's movement and the repeatability of the positioning accuracy.

[0027] Reference Figure 7In one embodiment of this application, guide blocks 314 are fixedly connected to both ends of the sliding seat 310. The guide blocks 314 are engaged with the inner wall of the lower template 200, and the sliding seat 310 slides back and forth along the direction of the guide blocks 314.

[0028] It should be noted that the guide block 314, as a connecting and guiding component between the sliding seat 310 and the lower mold core 210, is fixed on both sides of the sliding seat 310 and forms a snap-fit ​​engagement with the guide groove (not shown in the figure) on the inner wall of the lower mold plate 200. This connection method ensures that the sliding seat 310 can only slide smoothly and linearly along the direction determined by the guide block 314, avoiding jamming or deviation during the movement, and ensuring the accuracy of the motion trajectory driven by the inclined guide post 400, thereby making the nut insertion and demolding actions more reliable.

[0029] Reference Figure 6-7 In one embodiment of this application, one end of the fixing post 530 is fixed to the inner wall of the housing 520, the other end of the fixing post 530 extends out of the housing 520 and into the molding cavity 700, and the fixing post 530 is adapted to be inserted into the interior of the first nut insert 510.

[0030] It should be noted that one end of the fixing post 530 is fixed to the housing 520, while the other end, as a free end, is precisely inserted into the threaded bottom hole of the first nut insert 510, thus achieving pre-positioning of the first nut insert 510 and ensuring that it is stably held in the designed position before injection molding. When molten plastic is injected into the molding cavity 700, the first nut insert 510 is supported and constrained by the fixing post 530, and is not easily displaced or tilted due to plastic impact, ensuring the accuracy of the nut position in the final product.

[0031] Reference Figure 8 In one embodiment of this application, the bottom of the sliding seat 310 is provided with a through groove 311, and a pin 312 is inserted inside the through groove 311; the bottom of the housing 520 is provided with a through hole. When the sliding seat 310 slides to its limit position away from the molding cavity 700, the through groove 311 communicates with the through hole.

[0032] It should be noted that during the mold opening process, the sliding seat 310 retracts under the drive of the inclined guide post 400. When it slides to its limit position, the through groove 311 aligns with the through hole of the housing 520. At this time, if the ejector pin 312 is driven (usually controlled by the mold ejection system), it can pass through the channel and act on the product or nut feeder 500, assisting in ejecting the molded product and further enhancing the reliability of demolding. In a specific implementation, several guide posts 321 are vertically fixed on the bottom inner wall of the rectangular groove 320, and the guide posts 321 extend upward through the housing 520. When installing the nut feeder 500, the guide posts 321 play a guiding role, ensuring that it can be accurately and smoothly placed into or ejected from the rectangular groove 320; on the other hand, the guide posts 321 restrict the horizontal movement of the housing 520, enhancing the stability of the connection, and can also serve as an anti-misinstallation structure to ensure the correct installation direction of the nut feeder 500.

[0033] Reference Figure 9-10 In an additional embodiment of this application, the specific features of the clamping mechanism 800 can be further described in conjunction with the following description: The clamping mechanism 800 includes a fixing plate 810 and a pressure plate 820, a feeding assembly 830 is slidably disposed between the fixing plate 810 and the pressure plate 820, and a plurality of second nut inserts 840 are engaged at one end of the feeding assembly 830 away from the pressure plate 820.

[0034] In this embodiment, a connecting post 850 is provided between the pressure plate 820 and the fixing plate 810. One end of the connecting post 850 is fixedly connected to the fixing plate 810, and the other end of the connecting post 850 extends into the interior of the pressure plate 820. A stop part 851 is fixedly connected to the end of the connecting post 850 away from the fixing plate 810. The stop part 851 is movably disposed inside the pressure plate 820. When the pressure plate 820 moves toward the fixing plate 810, the end of the stop part 851 away from the fixing plate 810 protrudes out of the pressure plate 820.

[0035] It should be noted that the connecting post 850 ensures that the pressure plate 820 remains parallel to the fixed plate 810 during movement, preventing jamming or uneven wear caused by lateral forces. This constrains the complex movement of the pressure plate 820 into precise linear movement along the axis of the connecting post 850, improving the stability and service life of the entire clamping mechanism 800. The stop 851 is a safety structure feature designed to prevent detachment. Its connection to the end of the connecting post 850 can be a threaded connection, an interference fit, or integral machining. When the pressure plate 820 retracts upward to its limit position, the stop 851 abuts against a pre-set step or additional retaining ring inside the pressure plate 820, preventing the pressure plate 820 from completely detaching from the connecting post 850 and reducing the risk of the clamp disintegrating during handling, replacement, or maintenance.

[0036] Reference Figure 2-4 In one embodiment of this application, a plurality of mounting members 111 are fixedly inserted inside the upper mold core 110, and the mounting members 111 extend out of the upper mold core 110 and into the molding cavity 700. When the second nut insert 840 is inserted into the molding cavity 700 through the clamping mechanism 800, the fixing plate 810 is snapped onto the surface of the upper mold core 110, and the second nut insert 840 corresponds one-to-one with the molding cavity 700; When the pressure plate 820 is pressed down to its limit position in the direction close to the forming cavity 700, the feeding assembly 830 drives the nut insert to be sleeved on the outer wall of the mounting member 111.

[0037] It should be noted that the fixing plate 810, which snaps onto the surface of the upper mold core 110, ensures precise alignment in three-dimensional space between the nut delivery channel (outlet of bushing 832) on the fixture and the target position (forming cavity 700) on the mold. The mounting component 111, typically a core pin or locating pin, provides final internal positioning and support for the nut insert, preventing molten plastic from flowing into the nut's threads during subsequent injection molding. The workflow is as follows: precise fixture positioning, pressure plate 820 pressing down, push rod 831 pushing synchronously, nut disengaging from bushing 832, and nut fitting into mounting component 111. The entire process achieves a seamless transition from "clamping and delivery" to "precise positioning and insertion."

[0038] Reference Figure 2 In one embodiment of this application, positioning holes 120 are respectively provided on both sides of the upper template 100, and positioning posts 811 are respectively fixedly connected to both ends of the fixing plate 810. When the fixing plate 810 is snapped onto the surface of the upper mold core 110, the positioning post 811 is adapted to fit into the interior of the positioning hole 120.

[0039] It should be noted that the contact surface between the fixed plate 810 and the upper mold core 110 restricts three degrees of freedom, while the tight fit between the two positioning pins 811 and the positioning hole 120 restricts the remaining three degrees of freedom. This determines the spatial position of the clamping mechanism 800 on the mold, ensuring that the second nut insert 840 and the forming cavity 700 maintain consistency each time the clamping mechanism 800 is installed. This is crucial for the quality stability of mass production.

[0040] Reference Figure 9-10 In one embodiment of this application, the feeding assembly 830 includes a plurality of push rods 831 arranged in parallel. One end of each push rod 831 is fixedly connected to the side of the pressure plate 820 facing the fixing plate 810, and the other end of each push rod 831 extends out of the fixing plate 810 and engages with the second nut insert 840.

[0041] It should be noted that the snap-fit ​​mechanism provides a releasable temporary fixation between the push rod 831 and the second nut insert 840. As an example, this snap-fit ​​structure can be a magnetic element, such as a permanent magnet, located at the end of the push rod 831, which magnetically attracts the ferrous nut insert; or it can be an elastic claw structure that engages with the threads or grooves of the nut through slight elastic deformation. In a specific implementation, when magnetic attraction is used, the principle is to utilize magnetic force to overcome the nut's own weight and the friction between it and the bushing 832, achieving a stable grip; and when the pressure plate 820 is pressed down to its endpoint, the supporting force of the mounting member 111 on the second nut insert 840 will be greater than the magnetic force, thereby reliably detaching the second nut insert 840 and fitting it onto the mounting member 111.

[0042] In one embodiment of this application, a plurality of bushings 832 are fixedly provided on the inner wall of the fixing plate 810, and one end of the bushing 832 away from the pressure plate 820 protrudes from the fixing plate 810. The bushing 832 is slidably sleeved on the outer wall of the push rod 831, and the second nut insert 840 is adapted to fit into the inside of the bushing 832.

[0043] It should be noted that the bushing 832 serves a dual function of guiding and accommodating. Its inner bore forms a sliding pair with the outer wall of the push rod 831, providing precise guidance for the linear movement of the push rod 831 and ensuring its trajectory remains straight. Simultaneously, the accommodating cavity formed by its end protruding from the fixing plate 810 has an inner diameter that matches the outer diameter of the nut insert, stably constraining the nut before insertion and effectively preventing horizontal movement or overturning. As an example, the bushing 832 can be made of highly wear-resistant materials, such as bearing steel or copper alloys, to improve its service life. This is achieved through a tight fit of the mechanical structure, providing radial positioning for the nut.

[0044] In one embodiment of this application, a limiting sleeve 833 is fixedly sleeved on the outer wall of the push rod 831, and the limiting sleeve 833 is fixedly connected to the pressure plate 820. When the pressure plate 820 moves to its limit position in the direction close to the fixing plate 810, the end of the limiting sleeve 833 near the fixing plate 810 abuts against the surface of the fixing plate 810.

[0045] It should be noted that the limiting sleeve 833 serves as a mechanical hard limit, a safety protection structure, and its installation position determines the extreme position of the downward movement of the pressure plate 820. When the limiting sleeve 833 contacts the surface of the fixed plate 810, the pressure plate 820 cannot continue to move downward, thus preventing the push rod 831 from overextending due to operational errors or excessive stroke, which could damage the mounting part 111, the mold core, or the already placed second nut insert 840 below. Its principle is to mechanically limit the stroke of moving parts through rigid contact, ensuring consistency in each action and improving the reliability and safety of the equipment.

[0046] In one embodiment of this application, a spring 834 is sleeved on the outer wall of the push rod 831. The spring 834 is fixedly connected to the pressure plate 820. When the pressure plate 820 moves toward the fixed plate 810, the spring 834 is in a compressed state.

[0047] It should be noted that the function of the spring 834 is to achieve automatic reset of the pressure plate 820. When an external force drives the pressure plate 820 downward, the spring 834 is compressed, storing elastic potential energy. When the implantation action is completed and the external force is removed, the potential energy stored in the spring 834 is released, pushing the pressure plate 820 upward to return to its initial position, preparing for the next implantation operation. This design simplifies the operation, achieving reset without an additional power source, and is particularly suitable for manual or semi-automatic operation scenarios.

[0048] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0049] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0050] The above provides a detailed description of an injection mold for integral molding of a pre-embedded nut provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An injection mold for integrally molding a pre-embedded nut, comprising an upper mold plate and a lower mold plate, wherein an upper mold core is fixed inside the upper mold plate and a lower mold core is fixed inside the lower mold plate, characterized in that: The lower mold core is slidably connected to a sliding assembly and an inclined guide post, and the inclined guide post passes through the sliding assembly and the lower mold core in sequence; The top of the sliding assembly is movably connected to a nut feeder, which is used to fix the first nut insert inside the injection molded product. A plurality of column grooves are provided side by side between the upper mold core and the lower mold core. The column grooves are connected to the molding cavity. An abutment post is fitted inside the column groove and extends to the molding cavity and abuts against the first nut insert.

2. The injection mold for integrally forming a pre-embedded nut according to claim 1, characterized in that: It also includes a clamping mechanism, which includes a fixed plate and a pressure plate. A feeding assembly is slidably disposed between the fixed plate and the pressure plate. A plurality of second nut inserts are engaged at the end of the feeding assembly away from the pressure plate.

3. The injection mold for integral molding of a pre-embedded nut according to claim 2, characterized in that: Several mounting components are fixedly inserted inside the upper mold core, and the mounting components extend out of the upper mold core and into the molding cavity. When the second nut insert is inserted into the molding cavity through the clamping mechanism, the fixing plate is snapped onto the surface of the upper mold core, and the second nut insert corresponds one-to-one with the molding cavity; When the pressure plate is pressed down to its limit position in the direction of approaching the forming cavity, the feeding assembly drives the nut insert to be sleeved on the outer wall of the mounting part.

4. The injection mold for integrally forming a pre-embedded nut according to claim 1, characterized in that: The sliding assembly includes a sliding seat, and a rectangular groove is formed at one end of the top of the sliding seat near the molding cavity; The nut feeder includes a housing, which is adapted to snap into the interior of the rectangular groove. Several fixing posts are arranged in parallel inside the housing, and the fixing posts are coaxially and correspondingly arranged with the abutment posts.

5. The injection mold for integrally forming a pre-embedded nut according to claim 4, characterized in that: One end of the fixing post is fixed to the inner wall of the housing, and the other end of the fixing post extends through the housing and into the molding cavity, and the fixing post is adapted to be inserted into the interior of the first nut insert.

6. The injection mold for integrally forming a pre-embedded nut according to claim 4, characterized in that: The bottom of the sliding seat is provided with a through groove, and a pin is inserted through the through groove; the bottom of the housing is provided with a through hole. When the sliding seat slides to its limit position away from the molding cavity, the through groove communicates with the through hole.

7. The injection mold for integral molding of a pre-embedded nut according to claim 2, characterized in that: Positioning holes are provided on both sides of the upper template, and positioning posts are fixedly connected to both ends of the fixing plate. When the fixing plate is snapped onto the surface of the upper mold core, the positioning pin is adapted to fit into the interior of the positioning hole.

8. The injection mold for integral molding of a pre-embedded nut according to claim 2, characterized in that: The feeding assembly includes several push rods arranged in parallel. One end of each push rod is fixedly connected to the side of the pressure plate facing the fixed plate, and the other end of each push rod extends out of the fixed plate and engages with the second nut insert.

9. The injection mold for integrally molding a pre-embedded nut according to claim 8, characterized in that: The outer wall of the push rod is fixedly fitted with a limiting sleeve, and the limiting sleeve is fixedly connected to the pressure plate; When the pressure plate moves to its limit position towards the fixed plate, the end of the limiting sleeve near the fixed plate abuts against the surface of the fixed plate.

10. The injection mold for integrally forming a pre-embedded nut according to claim 8, characterized in that: A spring is fitted on the outer wall of the push rod, and the spring is fixedly connected to the pressure plate. When the pressure plate moves toward the fixed plate, the spring is in a compressed state.

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