A clamp and injection mold for implant nut

Abstract

The application provides a clamp for implanting nuts, comprising a fixed plate and a pressing plate, a feeding assembly is slidably arranged between the fixed plate and the pressing plate, and a plurality of nut inserts are connected to the end of the feeding assembly away from the pressing plate. The application also provides an injection mold, comprising an upper mold plate and an upper mold core, the upper mold core is fixed to the inside of the upper mold plate, a plurality of forming cavities are arranged side by side on the surface of the upper mold core, and a mounting member is fixedly arranged in the inside of each forming cavity; when the nut inserts are implanted into the forming cavities through the clamp, the fixed plate is connected to the surface of the upper mold core, and the nut inserts correspond to the forming cavities one by one; when the pressing plate is pressed to the limit position in the direction close to the forming cavities, the feeding assembly drives the nut inserts to be sleeved on the outer wall of the mounting member. The application has the effect that a plurality of nut inserts are synchronously, smoothly and accurately implanted into the forming cavities.

Description

Technical Field

[0001] This application relates to injection molding technology, specifically to a clamp and injection mold for inserting nuts. Background Technology

[0002] In injection molding, it is often necessary to embed inserts such as metal nuts into plastic products to enhance the connection strength or achieve threaded connections. A common practice in existing technologies is to pre-place the nut in the mold cavity before injection molding; after the plastic is injected and cooled, the nut is fixed inside the product. This type of nut-embedding process is widely used in structural components of electronic device housings, automotive parts, and household appliances to improve product assembly performance and lifespan.

[0003] However, in the existing technology, when multiple nuts are implanted at the same time, there is a lack of an effective synchronous pressing mechanism, resulting in low implantation efficiency and poor stability. Furthermore, the nuts are prone to deflection or falling off during the implantation process, leading to inaccurate positioning and affecting the consistency of product dimensions. Utility Model Content

[0004] In view of the aforementioned problems, this application is made to provide a clamp for inserting nuts that overcomes or at least partially solves the aforementioned problems, applied to an injection mold, comprising a fixed plate and a pressure plate, wherein a feeding assembly is slidably disposed between the fixed plate and the pressure plate, and a plurality of nut inserts are engaged at one end of the feeding assembly away from the pressure plate.

[0005] 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 nut insert.

[0006] Preferably, a plurality of bushings are fixedly inserted through the inner wall of the fixing plate, and the end of the bushing away from the pressure plate protrudes from the fixing plate; The bushing is slidably sleeved on the outer wall of the push rod, and the nut insert is adapted to fit inside the bushing.

[0007] 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.

[0008] 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.

[0009] Preferably, a connecting post is provided between the pressure plate and the fixing plate, one end of the connecting post is fixedly connected to the fixing plate, and the other end of the connecting post extends into the interior of the pressure plate.

[0010] Preferably, a stop is fixedly connected to the end of the connecting column away from the fixed plate, and the stop is movably disposed inside the pressure plate; When the pressure plate moves toward the fixed plate, the end of the stop portion away from the fixed plate protrudes from the pressure plate.

[0011] An injection mold, comprising a fixture as described in any embodiment of this application; It also includes an upper template and an upper mold core. The upper mold core is fixed inside the upper template. Several forming cavities are arranged side by side on the surface of the upper mold core. An installation component is fixedly inserted inside the forming cavity. When the nut insert is inserted into the molding cavity through the clamp, the fixing plate is engaged with the surface of the upper mold core, and the 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.

[0012] 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.

[0013] This application has the following advantages: In the embodiments of this application, in contrast to the shortcomings of existing technologies such as easy deviation and detachment of nuts during implantation and asynchronous implantation of multiple nuts, this application provides a solution for an implantation mechanism that integrates positioning, clamping, and synchronous pressing. Specifically, it includes: a clamp for implanting nuts, comprising a fixing plate and a pressure plate, wherein a feeding assembly is slidably disposed between the fixing plate and the pressure plate, and a plurality of nut inserts are engaged at the end of the feeding assembly away from the pressure plate; an injection mold, comprising the clamp as described in any embodiment of this application; further comprising an upper template and an upper mold core, wherein the upper mold core is fixed inside the upper template, and a plurality of molding cavities are arranged side by side on the surface of the upper mold core, and an installation member is fixedly disposed inside the molding cavity; when the nut inserts are implanted into the molding cavity through the clamp, the fixing plate is engaged with the surface of the upper mold core, and the nut inserts correspond one-to-one with the molding cavities; when the pressure plate is pressed down to its limit position in the direction close to the molding cavity, the feeding assembly drives the nut inserts to be sleeved on the outer wall of the installation member. By using the design of "fixed plate attached to the surface of upper mold core" and "nut insert corresponding to the molding cavity one by one", the problem of nuts being prone to deflection or falling off during the implantation process is solved, achieving the effect of precise positioning and preventing displacement. By using the linkage structure of the feeding component to drive the nut insert to be sleeved on the outer wall of the mounting part, combined with several push rods arranged in parallel, the problem of lacking an effective synchronous pressing mechanism when multiple nuts are implanted at the same time is solved, achieving the effect of multiple nut inserts being implanted synchronously, smoothly and accurately into the molding cavity. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the structure of a clamp for inserting a nut according to an embodiment of this application; Figure 2 This is a schematic diagram of the upper mold core of a clamp for inserting a nut, provided in one embodiment of this application; Figure 3 This is an embodiment provided by this application. Figure 2 A schematic diagram of the local structure of region A; Figure 4 This is a schematic diagram of an implantation mechanism for a clamp used for implanting a nut, according to an embodiment of this application; Figure 5 This is an embodiment provided by this application. Figure 4 A schematic diagram of the local structure of region B; Figure 6This is another schematic diagram of the implantation mechanism of a clamp for implanting a nut, provided in one embodiment of this application; Figure 7 This is a schematic diagram of a feeding assembly for a clamp used for inserting nuts, provided in an embodiment of this application; Figure 8 This is another schematic diagram from an embodiment of the present application of a feeding assembly for a clamp used to implant a nut; Figure 9 This is a schematic diagram of a connecting post of a clamp for implanting a nut, provided in one embodiment of this application; The reference numerals in the accompanying drawings are as follows: 100. Upper mold core; 200. Fixing plate; 210. Positioning post; 220. Connecting post; 221. Stop; 300. Pressure plate; 400. Feeding assembly; 410. Push rod; 420. Bushing; 430. Limiting sleeve; 440. Spring; 500. Nut insert; 600. Molding cavity; 700. Mounting part; 800. Upper template; 810. Positioning hole. Detailed Implementation

[0016] 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.

[0017] The inventors discovered through analysis of existing technologies that when multiple nuts are implanted simultaneously, there is a lack of an effective synchronous pressing mechanism, resulting in low implantation efficiency and poor stability. Furthermore, the nuts are prone to skew or fall off during implantation, leading to inaccurate positioning and affecting the consistency of product dimensions.

[0018] Reference Figure 1 This illustration shows a clamp for inserting nuts according to an embodiment of the present application, applied to an injection mold, including a fixing plate 200 and a pressure plate 300, with a feeding assembly 400 slidably passing between the fixing plate 200 and the pressure plate 300, and a plurality of nut inserts 500 being engaged at one end of the feeding assembly 400 away from the pressure plate 300.

[0019] In the embodiments of this application, in contrast to the shortcomings of existing technologies such as easy deviation and detachment of nuts during implantation and asynchronous implantation of multiple nuts, this application provides a solution for an implantation mechanism that integrates positioning, clamping, and synchronous pressing. Specifically, it includes: a clamp for implanting nuts, comprising a fixing plate 200 and a pressure plate 300, wherein a feeding assembly 400 is slidably disposed between the fixing plate 200 and the pressure plate 300, and a plurality of nut inserts 500 are engaged at one end of the feeding assembly 400 away from the pressure plate 300; an injection mold, comprising the clamp as described in any embodiment of this application; and further comprising an upper template 800 and an upper mold core 100. The upper mold core 100 is fixed inside the upper template 800. A plurality of forming cavities 600 are arranged side by side on the surface of the upper mold core 100. An installation member 700 is fixedly inserted inside the forming cavity 600. When the nut insert 500 is inserted into the forming cavity 600 by the clamp, the fixing plate 200 is snapped onto the surface of the upper mold core 100. The nut insert 500 corresponds one-to-one with the forming cavity 600. When the pressure plate 300 is pressed down to the limit position in the direction close to the forming cavity 600, the feeding assembly 400 drives the nut insert 500 to be sleeved on the outer wall of the installation member 700. By designing "fixed plate 200 snapped onto the surface of upper mold core 100" and "nut insert 500 corresponding one-to-one with molding cavity 600", the problem of nuts easily deviating or falling off during implantation is solved, achieving precise positioning and preventing displacement. By using the linkage structure of feeding component 400 driving nut insert 500 to be sleeved on the outer wall of mounting component 700, combined with several parallel push rods 410, the problem of lacking an effective synchronous pressing mechanism when multiple nuts are implanted at the same time is solved, achieving the effect of multiple nut inserts 500 being implanted synchronously, smoothly and accurately into molding cavity 600.

[0020] The following will further describe a clamp for inserting a nut in this exemplary embodiment.

[0021] Reference Figure 4-9 In one embodiment of this application, the specific features of the feeding component 400 can be further described in conjunction with the following description.

[0022] The feeding assembly 400 includes a plurality of push rods 410 arranged in parallel. One end of each push rod 410 is fixedly connected to the side of the pressure plate 300 facing the fixing plate 200, and the other end of each push rod 410 extends out of the fixing plate 200 and engages with the nut insert 500.

[0023] It should be noted that the snap-fit ​​mechanism provides a releasable temporary fixation between the push rod 410 and the nut insert 500. 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 410, which magnetically attracts the ferrous nut insert 500; 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 420, achieving a stable grip; and when the pressure plate 300 is pressed down to its endpoint, the supporting force of the mounting piece 700 on the nut will be greater than the magnetic force, thereby reliably detaching the nut and fitting it onto the mounting piece 700.

[0024] Reference Figure 6 and Figure 7 In one embodiment of this application, a plurality of bushings 420 are fixedly provided on the inner wall of the fixing plate 200, and one end of the bushing 420 away from the pressure plate 300 protrudes from the fixing plate 200. The bushing 420 is slidably sleeved on the outer wall of the push rod 410, and the nut insert 500 is adapted to be fitted inside the bushing 420.

[0025] It should be noted that the bushing 420 serves a dual function of guiding and accommodating. Its inner hole forms a sliding pair with the outer wall of the push rod 410, providing precise guidance for the linear movement of the push rod 410 and ensuring that the movement trajectory of the push rod 410 is not deviated. At the same time, the accommodating cavity formed by its end protruding from the fixing plate 200 has an inner diameter that matches the outer diameter of the nut insert 500, so that the nut is stably constrained within it before insertion, effectively preventing the nut from moving or tipping over in the horizontal direction. The bushing 420 can be made of highly wear-resistant materials, such as bearing steel or copper alloy, to improve its service life. The principle is to use the tight fit of the mechanical structure to provide radial positioning for the nut.

[0026] Reference Figure 6-8 In one embodiment of this application, a limiting sleeve 430 is fixedly sleeved on the outer wall of the push rod 410, and the limiting sleeve 430 is fixedly connected to the pressure plate 300; When the pressure plate 300 moves to its limit position in the direction close to the fixed plate 200, the end of the limiting sleeve 430 near the fixed plate 200 abuts against the surface of the fixed plate 200.

[0027] It should be noted that the limiting sleeve 430 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 300. When the limiting sleeve 430 contacts the surface of the fixed plate 200, the pressure plate 300 cannot continue to move downward, thus preventing the push rod 410 from overextending due to operational errors or excessive stroke, which could damage the mounting component 700, the mold core, or the already placed nut 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.

[0028] Reference Figure 6-8 In one embodiment of this application, a spring 440 is sleeved on the outer wall of the push rod 410. The spring 440 is fixedly connected to the pressure plate 300. When the pressure plate 300 moves toward the fixed plate 200, the spring 440 is in a compressed state.

[0029] It should be noted that the function of the spring 440 is to achieve automatic reset of the pressure plate 300. When an external force drives the pressure plate 300 downward, the spring 440 is compressed and stores elastic potential energy. When the implantation action is completed and the external force is removed, the potential energy stored in the spring 440 is released, pushing the pressure plate 300 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.

[0030] Reference Figure 6-9 In one embodiment of this application, a connecting post 220 is provided between the pressure plate 300 and the fixing plate 200. One end of the connecting post 220 is fixedly connected to the fixing plate 200, and the other end of the connecting post 220 extends into the interior of the pressure plate 300.

[0031] It should be noted that the connecting column 220 ensures that the pressure plate 300 remains parallel to the fixed plate 200 during movement, preventing jamming or uneven wear caused by lateral forces. This constrains the complex movement of the pressure plate 300 into a precise linear movement along the axis of the connecting column 220, thereby improving the stability and service life of the entire implantation mechanism.

[0032] Reference Figure 6-9 In one embodiment of this application, a stop 221 is fixedly connected to one end of the connecting post 220 away from the fixing plate 200, and the stop 221 is movably disposed inside the pressure plate 300. When the pressure plate 300 moves toward the fixed plate 200, the end of the stop part 221 away from the fixed plate 200 passes through the pressure plate 300.

[0033] It should be noted that the stop 221 is a safety structure feature to prevent detachment. Its connection to the end of the connecting post 220 can be a threaded connection, an interference fit, or an integrally formed component. When the pressure plate 300 retracts upward to its limit position under the action of the spring 440, the stop 221 will abut against a pre-set step or a separately installed retaining ring inside the pressure plate 300, thereby preventing the pressure plate 300 from completely detaching from the connecting post 220 and avoiding the risk of the clamp falling apart during handling, replacement, or maintenance.

[0034] Reference Figure 1-3 This application provides an injection mold, including a fixture as described in any embodiment of this application; It also includes an upper template 800 and an upper mold core 100. The upper mold core 100 is fixed inside the upper template 800. A plurality of forming cavities 600 are arranged side by side on the surface of the upper mold core 100. An installation member 700 is fixedly inserted inside the forming cavity 600. When the nut insert 500 is inserted into the molding cavity 600 through the clamp, the fixing plate 200 is snapped onto the surface of the upper mold core 100, and the nut insert 500 corresponds one-to-one with the molding cavity 600; When the pressure plate 300 is pressed down to its limit position in the direction close to the forming cavity 600, the feeding assembly 400 drives the nut insert 500 to be sleeved on the outer wall of the mounting member 700.

[0035] It should be noted that the fixing plate 200, snapped onto the surface of the upper mold core 100, ensures precise alignment in three-dimensional space between the nut delivery channel (outlet of bushing 420) on the fixture and the target position (molding cavity 600) on the mold. The mounting component 700, typically a core pin or locating pin, provides final internal positioning and support for the nut insert 500, preventing molten plastic from flowing into the nut's threads during subsequent injection molding. The workflow is as follows: precise fixture positioning, pressure plate 300 pressing down, push rod 410 synchronously pushing, nut disengaging from bushing 420, and nut fitting into mounting component 700. The entire process achieves a seamless transition from "clamping and delivery" to "precise positioning and insertion."

[0036] Reference Figure 1 In one embodiment of this application, positioning holes 810 are respectively provided on both sides of the upper template 800, and positioning posts 210 are respectively fixedly connected to both ends of the fixing plate 200. When the fixing plate 200 is snapped onto the surface of the upper mold core 100, the positioning post 210 is adapted to fit into the interior of the positioning hole 810.

[0037] It should be noted that the contact surface between the fixed plate 200 and the upper mold core 100 restricts three degrees of freedom, while the tight fit between the two positioning pins 210 and the positioning hole 810 (usually a small clearance fit, such as H7 / g6) restricts the remaining three degrees of freedom, thereby determining the spatial position of the fixture on the mold. This ensures that the nut insert 500 and the forming cavity 600 can maintain consistency each time the fixture is installed, which is crucial for the quality stability of mass production.

[0038] 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.

[0039] 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.

[0040] The above provides a detailed description of a clamp and injection mold for implanting nuts 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. A clamp for inserting a nut, applied to an injection mold, characterized in that: It includes a fixed plate and a pressure plate, and a feeding assembly is slidably disposed between the fixed plate and the pressure plate. A number of nut inserts are engaged at the end of the feeding assembly away from the pressure plate.

2. The clamp for inserting a nut according to claim 1, 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 nut insert.

3. A clamp for inserting a nut according to claim 2, characterized in that: A plurality of bushings are fixedly inserted through the inner wall of the fixing plate, and the end of the bushing away from the pressure plate protrudes from the fixing plate; The bushing is slidably sleeved on the outer wall of the push rod, and the nut insert is adapted to fit inside the bushing.

4. A clamp for inserting a nut according to claim 2, 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.

5. A clamp for inserting a nut according to claim 2, 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.

6. A clamp for inserting a nut according to claim 1, characterized in that: A connecting post is provided between the pressure plate and the fixing plate. One end of the connecting post is fixedly connected to the fixing plate, and the other end of the connecting post extends into the interior of the pressure plate.

7. A clamp for inserting a nut according to claim 6, characterized in that: A stop is fixedly connected to one end of the connecting column away from the fixed plate, and the stop is movably disposed inside the pressure plate; When the pressure plate moves toward the fixed plate, the end of the stop portion away from the fixed plate protrudes from the pressure plate.

8. An injection mold, characterized in that, Includes the clamp as described in any one of claims 1-7; It also includes an upper template and an upper mold core. The upper mold core is fixed inside the upper template. Several forming cavities are arranged side by side on the surface of the upper mold core. An installation component is fixedly inserted inside the forming cavity. When the nut insert is inserted into the molding cavity through the clamp, the fixing plate is engaged with the surface of the upper mold core, and the 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.

9. An injection mold according to claim 8, 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.

Images