A slider core-pulling mechanism for terminal injection molding

Abstract

The application provides a slider core-pulling mechanism for terminal injection molding, which is arranged in a terminal injection mold and comprises an oil cylinder fixedly arranged on the terminal injection mold, a shovel base rigidly connected with a piston rod of the oil cylinder, a core-pulling slider slidably arranged on a fixed mold side of the terminal injection mold and driven and matched with the shovel base through an inclined surface to convert horizontal movement of the shovel base into lifting movement of the core-pulling slider, and a core-pulling core fixedly arranged on the core-pulling slider and provided with a pressing surface at a front end of the core-pulling core, which is used for pressing an upper surface of the terminal after mold closing and before injection molding to define the position of the terminal. The core-pulling slider positioning mechanism driven by the oil cylinder is additionally arranged to physically lock the position of the terminal during the injection molding process, thereby completely solving the problem of displacement of the terminal due to impact of high-pressure melt and greatly improving the consistency of the height dimension of the terminal.

Description

Technical Field

[0001] This application belongs to the field of mold manufacturing and molding technology. Specifically, it relates to a slider core-pulling mechanism for injection molding of terminals, and particularly to a hydraulic cylinder driven slider core-pulling mechanism for fixing the height position of inserts (terminals). Background Technology

[0002] In injection molding, it is often necessary to overmold inserts such as terminals to form plastic products with specific electrical connection functions. To ensure the electrical performance and assembly accuracy of the product, the center distance between terminals and the height position of the terminals in the plastic are usually subject to extremely strict requirements.

[0003] Traditional injection molding methods involve designing a dedicated "first-stage injection block" for the terminal. Before the actual overmolding, the terminal is pre-fixed in a small plastic block through a first-stage injection molding process, thus initially positioning and fixing the center distance and height of the terminal. Then, this injection block with the terminal is used as an insert and placed into the final mold for a second-stage overmolding process. This two-stage injection molding method effectively ensures the positional accuracy of the terminal.

[0004] However, this traditional two-injection molding method has high requirements for product size; that is, the product itself needs to have sufficient space to accommodate and conceal the first injection block. Due to structural limitations, the product involved in this application is extremely small and does not have the space required for two-injection molding, therefore it cannot be produced using the aforementioned traditional process.

[0005] In cases where a two-stage injection molding process is not feasible, the only option is to manually place the three terminals into the mold cavity for a single injection molding process. However, due to the extremely small product size, the space within the mold for placing the terminals is extremely limited and positioning is difficult. This results in inconsistent heights of the three terminals during mold closing and injection molding, even when manually positioned, due to factors such as injection pressure and human error. Consequently, the terminal height of the molded product has an extremely low pass rate, with a scrap rate exceeding 50%, severely impacting production feasibility and economic efficiency, and ultimately preventing normal mass production.

[0006] Therefore, how to simply and effectively fix the height position of terminals and ensure the consistency of terminal height during the overmolding process of small-sized products has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] This application provides a slider core-pulling mechanism for terminal injection molding, which solves the problem of ensuring the consistent height position of multiple manually placed terminals during a single overmolding process for products that are too small to be produced by two injection molding processes. This overcomes the problem of low yield and inability to mass produce due to terminal height fluctuations.

[0008] In a first aspect, this application provides a slider core-pulling mechanism for terminal injection molding, which is disposed in a terminal injection mold and includes: an oil cylinder, which is fixedly disposed on the terminal injection mold;

[0009] The shovel base is rigidly connected to the piston rod of the hydraulic cylinder and is driven by the hydraulic cylinder to reciprocate on the fixed mold;

[0010] The core-pulling slider is slidably disposed on the fixed mold side of the terminal injection mold and engages with the shovel base through an inclined surface drive to convert the horizontal movement of the shovel base into the vertical movement of the core-pulling slider;

[0011] The core puller is fixedly mounted on the core puller slider. Its front end has a pressing surface, which is used to press the upper surface of the terminal after mold closing and before injection molding to limit the position of the terminal.

[0012] In this process, after mold closing and before injection molding, the shovel base drives the core-pulling slider to its position, and then further drives the core-pulling slider to perform a small amount of core pulling in a direction perpendicular to the terminal axis, so that the pressing surface of the core is removed from the upper surface of the terminal to a position flush with the surface of the product cavity, thereby completing the injection molding.

[0013] In one implementation of the first aspect, the shovel base and the core-pulling slider slide in contact through a mutually cooperating inclined surface structure to convert the vertical or horizontal movement of the shovel base into the core-pulling movement of the core-pulling slider.

[0014] In one implementation of the first aspect, the core-pulling slider is provided with a guide groove, the shovel base is slidably embedded in the guide groove, and the shovel base is provided with a driving inclined surface that abuts against the inner wall of the guide groove.

[0015] In one implementation of the first aspect, the core-pulling slider is further provided with positioning grooves; the number of positioning grooves is the same as the number of terminals, and the bottom of each positioning groove has the same coordinates in the height direction.

[0016] In one implementation of the first aspect, the shape of the pressing surface of the core is adapted to the pressing portion on the upper surface of the terminal.

[0017] In one implementation of the first aspect, the method further includes: in the mold-closing state, the hydraulic cylinder drives the core-pulling slider to slide via the shovel base, causing the supporting end face to move to a first position to support the terminal; at a preset time during the injection molding process, the hydraulic cylinder drives the core-pulling slider to retract via the shovel base, causing the supporting end face to move to a second position, the distance between the second position and the first position corresponding to the target height of the terminal on the product surface; wherein, the supporting end face is a molding surface, and when the core-pulling slider moves to the second position, the supporting end face is flush with the surface of the product to form part of the product surface.

[0018] In one implementation of the first aspect, the distance between the first position and the second position is 0.5 mm to 1.0 mm, which is used to form an overlay layer on the terminal surface and fix its height position; the preset time is the instant before the injection molding is completed, so as to ensure that the support end face has been removed and the terminal has been height positioned before the molten plastic fills the cavity.

[0019] In one implementation of the first aspect, the distance of the micro-core pulling is set to 0.8 mm.

[0020] Secondly, this application provides a terminal injection molding method for a slider core-pulling mechanism for terminal injection molding, comprising:

[0021] S1: Place several terminals into the preset positions in the mold cavity;

[0022] S2: Mold closing, the core-pulling slider driven by the shovel base moves the core-pulling core towards the terminal until the pressing surface of the core-pulling core presses against the upper surface of the terminal, fixing the height position of the terminal;

[0023] S3: At the predetermined time point after the mold is closed and before the injection molding ends, start the hydraulic cylinder and drive the core-pulling slider to pull the core slightly in a direction perpendicular to the terminal axis, so that the pressing surface of the core is removed from the upper surface of the terminal to a position flush with the surface of the product cavity.

[0024] S4: Injection molding is completed, and the product cools and solidifies;

[0025] S5: Open the mold, eject and remove the product.

[0026] Thirdly, this application provides an injection mold, including a fixed mold, a moving mold, and a slider core-pulling mechanism for terminal injection molding.

[0027] As described above, the slider core-pulling mechanism for terminal injection molding described in this application has the following beneficial effects:

[0028] This application adds a slider core-pulling mechanism to the fixed mold side of the mold, which uses a hydraulic cylinder to pull the core to fix the height position of the injection-molded overmolded terminals. After the mold is closed, the hydraulic cylinder drives the shovel base to push the core to the upper surface of the conductive sheet, and pulls the core upward by 0.8mm to be flush with the product surface just before the injection is completed. This allows for precise control of the height position of the three terminals during the injection molding process, solving the problem that the terminal position cannot be fixed by two overmolding injections due to the small product size. This significantly improves the dimensional consistency of the product, increasing the terminal height qualification rate from less than 50% before optimization to over 99%, ensuring the mass production capability of the product. At the same time, it simplifies the operation process, improves production efficiency, and reduces scrap rate and rework waste. Attached Figure Description

[0029] Figure 1A The image shown is a front view of the external structure of the slider core-pulling mechanism for terminal injection molding in one embodiment of this application.

[0030] Figure 1B The diagram shown is a top view of the external structure of the slider core-pulling mechanism for terminal injection molding in one embodiment of this application.

[0031] Figure 2A The diagram shown is a cross-sectional schematic of the slider core-pulling mechanism for terminal injection molding in the prior art.

[0032] Figure 2B The diagram shows a schematic of a slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which adds a core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal by using a hydraulic cylinder.

[0033] Figure 3 The diagram shown is a schematic representation of a slider core-pulling mechanism for terminal injection molding according to an embodiment of this application.

[0034] Figure 4A The diagram shown is a schematic representation of the core-pulling mechanism for terminal injection molding in this application before optimization.

[0035] Figure 4B The diagram shown is a structural schematic of the product and terminals before optimization of the slider core-pulling mechanism for terminal injection molding in this application.

[0036] Figure 5 The diagram shows the overall process of the slide core-pulling mechanism for terminal injection molding in one embodiment of the present application, which uses a hydraulic cylinder to pull the core and fix the height position of the injection-molded overmolded terminal.

[0037] Figure 5A The diagram shows a schematic of the addition of a slider core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal using a hydraulic cylinder in one embodiment of the slider core-pulling mechanism for terminal injection molding of this application.

[0038] Figure 5B The diagram shows the first position after mold closing of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which is an additional slider core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal by using a hydraulic cylinder for core pulling.

[0039] Figure 5C The diagram shows a sliding core-pulling mechanism for terminal injection molding in one embodiment of the present application, which utilizes a hydraulic cylinder to pull the core and fix the height position of the injection-molded overmolded terminal as it slides out of the mold to the second position.

[0040] Figure 5D The diagram shown is a schematic representation of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which uses a hydraulic cylinder to pull the core and fix the height position of the injection-molded overmolded terminal during injection molding.

[0041] Figure 5E The diagram shown is a schematic representation of the product ejection process of a slider core-pulling mechanism for terminal injection molding, as described in one embodiment of the present application, which utilizes a hydraulic cylinder to pull the core and fix the height position of the injection-molded overmolded terminal.

[0042] Figure 6A The diagram shown illustrates the sliding process of the product ejection slider in one embodiment of the slider core-pulling mechanism for terminal injection molding according to this application.

[0043] Figure 6B The diagram shown is a schematic representation of the product ejection process of the slider core-pulling mechanism for terminal injection molding in one embodiment of this application.

[0044] Figure 7 The diagram shown is a schematic flow chart of an injection molding method for a slider core-pulling mechanism for terminal injection molding according to an embodiment of this application.

[0045] Figure 8 The diagram shown is a structural schematic of the electronic device described in an embodiment of this application.

[0046] Component designation explanation

[0047] M1 Terminal injection mold 100 Slider core pulling mechanism 200 Fixed mold 300 dynamic model 110 Hydraulic cylinder 120 shovel base 130 Core Pulling Slider 140 Core Extraction 1301 Guide groove 1302 positioning groove 400 terminal 500 Support end face 600 product 700 thimble 80 electronic devices 81 processor 82 memory Detailed Implementation

[0048] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0049] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0050] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0051] The following embodiments of this application provide a slider core-pulling mechanism for terminal injection molding. By adding a slider core-pulling mechanism to the fixed mold side of the mold, which uses a hydraulic cylinder to pull the core and fix the height position of the injection-molded overmolded terminal, after the mold is closed, the core is pushed to the upper surface of the conductive sheet by a shovel driven by the hydraulic cylinder. Before the injection is completed, the core is pulled upward by 0.8mm to be flush with the product surface. This allows for precise control of the height position of the three terminals during the injection molding process, solving the problem that the terminal position cannot be fixed by two overmolding injections due to the small product size. This significantly improves the dimensional consistency of the product, increasing the terminal height qualification rate from less than 50% before optimization to over 99%, ensuring the mass production capability of the product. At the same time, it simplifies the operation process, improves production efficiency, and reduces scrap rate and rework waste.

[0052] The following will describe in detail the principle and implementation of a slider core-pulling mechanism for terminal injection molding according to the present embodiment, with reference to the accompanying drawings, so that those skilled in the art can understand the slider core-pulling mechanism for terminal injection molding according to the present embodiment without creative effort.

[0053] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0054] Please see Figure 1A , Figure 1B , Figure 2A , Figure 2B , Figure 3 , Figure 4A and Figure 4BThe images shown are: a front view of the appearance structure of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application; a top view of the appearance structure of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application; a cross-sectional schematic diagram of the core-pulling structure of the slider core-pulling mechanism for terminal injection molding in the prior art; a schematic diagram of the core-pulling mechanism for terminal injection molding in one embodiment of the present application with the addition of a core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal using a hydraulic cylinder; a schematic diagram of the core-pulling mechanism in one embodiment of the slider core-pulling mechanism for terminal injection molding in the present application; a demolding schematic diagram of the core-pulling structure of the slider core-pulling mechanism for terminal injection molding in the present application before optimization; and a structural schematic diagram of the product and terminal of the slider core-pulling mechanism for terminal injection molding in the present application before optimization.

[0055] like Figure 1A , Figure 1B , Figure 2A , Figure 2B , Figure 3 , Figure 4A and Figure 4B As shown, this application relates to an injection mold, including: a fixed mold 200, a moving mold 300, and a slider core-pulling mechanism 100 for terminal injection molding. Furthermore, the slider core-pulling mechanism 100 for terminal injection molding of this application is disposed in the terminal injection mold M1, and includes: a hydraulic cylinder 110, a shovel base 120, a core-pulling slider 130, and a core-pulling core 140.

[0056] In one embodiment of this application, the slider core-pulling mechanism 100 for terminal injection molding includes: a hydraulic cylinder 110, fixedly mounted on the terminal injection mold M1; a shovel base 120, rigidly connected to the piston rod of the hydraulic cylinder 110, and driven by the hydraulic cylinder 110 to reciprocate on the fixed mold 200; a core-pulling slider 130, slidably mounted on the fixed mold 200 side of the terminal injection mold M1, and engaging with the shovel base 120 via an inclined surface drive to convert the horizontal movement of the shovel base 120 into the vertical movement of the core-pulling slider 130; and a core-pulling core 140, fixedly mounted on the core-pulling slider 130, having a pressing surface at its front end for pressing the upper surface of the terminal 400 after mold closing and before injection molding, thereby defining the position of the terminal 400.

[0057] After mold closing and before injection molding, the shovel base 120 drives the core-pulling slider 130 into position, and then further drives the core-pulling slider 130 to perform a small amount of core pulling in a direction perpendicular to the axial direction of the terminal 400, so that the pressing surface of the core-pulling core 140 is withdrawn from the upper surface of the terminal 400 to a position flush with the cavity surface of the product 600 (here, the product refers to the injection molded product or injection molded part), so as to complete the injection molding.

[0058] Specifically, the mechanism is installed on the fixed mold side of the injection mold (injection-molded overmolded terminal product, which contains three terminals) to precisely control the height position of the three terminals during the overmolding process, so as to solve the problem of product dimensional deviation caused by inconsistent terminal heights.

[0059] Therefore, it can be seen that the hydraulic cylinder 110 is fixedly installed on the outside of the fixed mold 200 (or on the mounting plate); the shovel base 120 is slidably disposed inside the fixed mold 200 and rigidly connected to the piston rod of the hydraulic cylinder 110, and is driven by the hydraulic cylinder 110 to reciprocate on the fixed mold 200; the core-pulling slider 130 is slidably disposed inside the cavity sidewall of the fixed mold 200 of the terminal injection mold M1. One end (driving end) of the core-pulling slider 130 is driven to cooperate with the shovel base 120 through a T-slot or inclined surface structure, and the other end (working end) has a supporting end face 500, which faces the inside of the mold cavity.

[0060] In other words, in this mechanism, the hydraulic cylinder 110 is fixedly installed in the fixed mold part of the mold, and its piston rod is drivenly connected to the shovel base 120; the core-pulling slider 130 is slidably assembled in the slide groove on the fixed mold side of the mold, and cooperates with the shovel base 120 through an inclined surface or guide groove; the core-pulling core 140 is fixedly connected to the front end of the core-pulling slider 130, and its front working end face (pressing surface) corresponds to the position of the conductive sheet of the terminal to be injected. Through the reciprocating motion of the hydraulic cylinder 110, the shovel base 120 can be driven to move the core-pulling slider 130 and the core-pulling core 140 in a direction perpendicular to the insertion direction of the terminal 400 or along the height direction of the terminal 400, thereby pressing the terminal 400 after mold closing and slightly retracting it before injection molding, so as to achieve precise fixation of the terminal height.

[0061] It should be noted that in this embodiment, the entire mechanism is integrated inside the fixed mold 200 without changing the original shape and size of the mold. The structure is compact and easy to modify and upgrade on existing molds, thus reducing implementation costs.

[0062] Please continue referring to Figure 1 to... Figure 4B .

[0063] In one embodiment, as shown in FIG2, the shovel base 120 and the core-pulling slider 130 slide in contact through a mutually cooperating inclined surface structure, so as to convert the vertical or horizontal movement of the shovel base 120 into the core-pulling movement of the core-pulling slider 130.

[0064] The core-pulling slider 130 is provided with a guide groove 1301, and the shovel base 120 is slidably embedded in the guide groove 1301. The shovel base 120 is provided with a driving inclined surface that abuts against the inner wall of the guide groove 1301. The core-pulling slider 130 is also provided with a positioning groove 1302; the number of positioning grooves 1302 is the same as the number of terminals 400, and the bottom of each positioning groove 1302 has the same coordinate in the height direction.

[0065] The shape of the pressing surface of the core 140 is adapted to the pressing part on the upper surface of the terminal 400.

[0066] Therefore, it can be seen that when the mold is closed, the oil cylinder 110 drives the core-pulling slider 130 to slide through the shovel base 120, so that the support end face 500 moves to the first position to support the terminal 400.

[0067] At a predetermined moment during the injection molding process, the hydraulic cylinder 110 drives the core-pulling slider 130 to retract via the shovel base 120, causing the support end face 500 to move to a second position. The distance between the second position and the first position corresponds to the target height of the terminal 400 on the surface of the product 600. The support end face 500 is a molding surface; when the core-pulling slider 130 moves to the second position, the support end face 500 is flush with the surface of the product 600, thus forming part of the surface of the product 600.

[0068] Further, preferably, the distance between the first position and the second position is 0.5mm to 1.0mm, used to form an overlay layer on the surface of the terminal 400 and fix its height position; the preset time is the instant before the injection molding is completed, to ensure that the support end face 500 has been removed and the terminal 400 has been height positioned before the molten plastic fills the cavity. The distance of the micro-pulling is preferably set to 0.8mm.

[0069] In other words, the specific structure of the supporting end face 500 can be adapted to the shape of the terminal 400. In this embodiment, such as Figure 5 As shown, the support end face 500 is a flat shaped surface.

[0070] When the core-pulling slider 130 is in the first position, the support end face 500 supports the lower surface of the terminal 400 (or abuts against the upper surface), which plays a role in precise positioning and resisting injection pressure, ensuring that the terminal does not shift under high pressure injection.

[0071] When the core-pulling slider 130 is in the second position, the support end face 500 is exactly flush with the surface of the product 600. At this time, the support end face 500, as part of the cavity surface, participates in the final surface forming of the product 600, ensuring that the terminal 400 is completely covered inside the product 600 and is at a consistent height.

[0072] In summary, this embodiment can achieve two functions with a single slider: rigid positioning in the early stage of injection molding and yielding and participating in molding in the later stage of injection molding. This avoids interference or marks that may occur due to the separate setting of positioning components in traditional processes, and improves the surface quality of the product.

[0073] Furthermore, such as Figure 3 As shown, the shovel base 120 is provided with a driving inclined surface, and the core-pulling slider 130 is provided with a driven inclined surface that slides in cooperation with the driving inclined surface. By adjusting the angle of the inclined surface, the core-pulling distance of the core-pulling slider 130 can be precisely controlled. This inclined surface cooperation design is not only simple in structure, but also has a self-locking characteristic, which can keep the slider position stable under injection pressure; at the same time, by changing the angle of the inclined surface, the core-pulling stroke can be flexibly adjusted to adapt to the requirements of different thicknesses of the overmolding layer.

[0074] Please see Figure 5 , Figure 5A , Figure 5B , Figure 5C , Figure 5D , Figure 5E , Figure 6A and Figure 6BThe images respectively show: a schematic diagram of the overall demolding process of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which adds a slider core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal using a hydraulic cylinder; a schematic diagram of terminal insertion of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which adds a slider core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal using a hydraulic cylinder; a schematic diagram of the first position after mold closing of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which adds a slider core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal using a hydraulic cylinder; and a schematic diagram of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which adds a slider core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal using a hydraulic cylinder. A schematic diagram of the sliding core-pulling mechanism for the height position of the injection-molded overmolded terminal sliding to the second position; a schematic diagram of the injection molding process of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which adds a hydraulic cylinder core-pulling mechanism to fix the height position of the injection-molded overmolded terminal; a schematic diagram of the product ejection process of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application, which adds a hydraulic cylinder core-pulling mechanism to fix the height position of the injection-molded overmolded terminal; a schematic diagram of the sliding working process of the product ejection slider in one embodiment of the slider core-pulling mechanism for terminal injection molding in the present application; and a schematic diagram of the product ejection process of the slider core-pulling mechanism for terminal injection molding in one embodiment of the present application.

[0075] Based on the above structure, the working process and principle of the slider core-pulling mechanism of this application are as follows:

[0076] First, mold closing and pre-support are carried out.

[0077] Specifically, before mold closing, i.e. in the open mold state, the operator places the terminal 400 into the predetermined position in the mold cavity. Then, the mold is closed, and the control system issues a command to drive the hydraulic cylinder 110 to push the shovel base 120 to slide. The shovel base 120 drives the core-pulling slider 130 to slide towards the center of the cavity through the inclined surface until the support end face 500 moves to the first position, that is, the support end face 500 abuts against the upper or lower surface of the terminal 400, thereby firmly fixing the terminal 400 at the preset height position.

[0078] This process allows for the rigid fixing of the terminals 400 before injection molding, eliminating positional errors caused by manual placement and ensuring the consistency of the height of the three terminals 400 from the source.

[0079] Then, injection molding and dynamic core pulling are performed.

[0080] Specifically, after mold closing and positioning are completed, the injection molding machine begins injection. At a preset moment before injection is complete (e.g., within 1 second before completion), the hydraulic cylinder 110 reverses its direction, pulling the shovel base 120 upwards. At this time, the core-pulling slider 130 retracts under the influence of the shovel base 120, and the support end face 500 is removed from the surface of the terminal 400. In this embodiment, the core-pulling distance of the core-pulling slider 130 is set to 0.8mm (i.e., the distance between the first and second positions), ensuring that the support end face 500 eventually moves to the second position, where it is flush with the theoretical surface of the product 600.

[0081] Therefore, in this process, the core-pulling action occurs at the end of the injection, which ensures that the molten plastic will not lose support for the terminal 400 due to the early withdrawal of the slider in the initial filling stage, and also avoids the plastic from failing to fill the space left by the slider due to the late withdrawal of the slider. At the same time, the preset core-pulling distance of 0.8mm is exactly equal to the thickness of the adhesive to be applied to the terminal 400, so as to ensure that the terminal 400 is completely covered and the surface is flat.

[0082] Next, the molding process is carried out.

[0083] Specifically, after the core-pulling action is completed, the molten plastic immediately fills the space left by the removal of the core-pulling slider 130, completely covering that part of the surface of the terminal 400 and forming the final surface of the product 600. Then, it enters the pressure-holding and cooling stage. During this process, because the core-pulling and filling occur almost simultaneously, the plastic can fully fill the tiny gaps, thus avoiding the formation of bubbles or shrinkage marks, thereby ensuring the density and appearance quality of the overlay layer.

[0084] Finally, the product is ejected. That is, after product 600 cools and solidifies, the mold is opened, and the molded product 600 is ejected through the ejection mechanism (such as ejector pin 700), forming a complete production cycle. At this point, a complete product injection molding cycle is completed, and the finished overmolded terminal is obtained.

[0085] It should be noted that the core-pulling distance can be adjusted according to the terminal height tolerance requirements and is not limited to 0.8mm; the core-pulling timing can also be appropriately advanced or delayed according to the injection molding process parameters, as long as the core can be pulled back before the injection is completed. Furthermore, the hydraulic cylinder can be replaced with a pneumatic or pneumatic cylinder, and the cooperation between the shovel base and the core-pulling slider can also adopt other common transmission forms such as inclined guide pillars or gear racks, as long as the reciprocating motion of the core can be achieved. The number of terminals is not limited to three; single or multiple core-pulling mechanisms can be set according to product requirements.

[0086] In other words, in this embodiment of the application, the existing direct injection molding of terminal inserts is optimized to add a slider core-pulling mechanism that uses a hydraulic cylinder to pull the core to fix the height of the injection terminal within 1 second after the mold is closed and before the injection is completed. This mechanism can pull the product part of the slider core-pulling mechanism that uses a hydraulic cylinder to pull the core to be flush with the product surface before injection is completed. Then the product is cooled and formed, the mold is opened and the product is ejected and taken out.

[0087] In summary, this complete injection molding process is highly automated and requires no manual adjustments, thus significantly improving production efficiency.

[0088] As can be seen from the above working process, by adopting the above structure and the corresponding working process, the core-pulling slider provides rigid support for the terminals in the early stage of injection molding and accurately withdraws and participates in molding in the later stage of injection molding, which completely solves the problem of the three terminal pins being sometimes high and sometimes low due to manual placement in the traditional process.

[0089] To visually demonstrate the actual effectiveness of this mechanism, comparative production tests were conducted on the molds before and after optimization. Before the addition of this core-pulling mechanism, due to the extremely small product size and the inability to perform secondary overmolding pre-fixation, the terminals were prone to displacement under injection molding impact, resulting in a long-term pass rate for the product terminal height dimension hovering below 50%, a high scrap rate, and difficulty in putting the mold into mass production.

[0090] After adopting the slider core-pulling mechanism for fixing the height position of the injection-molded overmolded terminal using the hydraulic cylinder core-pulling method described in this embodiment, the terminal height dimension qualification rate of the product has been steadily increased to over 99% after continuous batch trial production statistics.

[0091] Therefore, as demonstrated by the aforementioned actual production verification, the core-pulling mechanism provided in this application accurately positions the terminals mechanically before injection molding and removes them at the last moment of injection. This design structure ensures both positioning accuracy and avoids interference with product molding. Practice has proven that this application effectively solves the technical problem of not being able to perform secondary encapsulation positioning for small-sized products, significantly reducing material waste and substantially improving production efficiency.

[0092] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and inventive concept of this application, should be included within the scope of protection of this application. For example, the number of the core-pulling sliders can be set to one or more according to the number of terminals in the actual product, realizing simultaneous and precise positioning of multiple terminals; in addition, the shape of the supporting end face can also be designed as a contoured concave surface or a stepped surface according to the specific shape of the terminal, to suit the positioning requirements of different terminals such as cylindrical and flat. Therefore, these extended solutions all belong to the inventive concept of this application, and their design structure can adapt to the production requirements of different products, thereby expanding the scope of application of this application and having broad industrial applicability.

[0093] In summary, by adding a slider core-pulling mechanism that uses a hydraulic cylinder to pull the core in the mold to fix the height position of the injection-molded overmolded terminal, this application solves the quality defect problem of unstable height and unstable dimensions of the terminal after injection molding, improves the product qualification rate, and increases product production efficiency.

[0094] It should be understood that the module division in the embodiments of this application is illustrative and only represents a logical functional division. In actual implementation, there may be other division methods. Furthermore, the functional modules in the various embodiments of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0095] The terminal injection method of the slider core-pulling mechanism for terminal injection molding in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0096] Please see Figure 7 The image shows a schematic diagram of the injection molding method of the slider core-pulling mechanism for terminal injection molding in one embodiment of this application.

[0097] like Figure 7 As shown, this embodiment provides a terminal injection molding method for a slider core-pulling mechanism for terminal injection molding, the method including the following steps:

[0098] S1: Place several terminals into the preset positions in the mold cavity;

[0099] S2: Mold closing, the core-pulling slider driven by the shovel base moves the core-pulling core towards the terminal until the pressing surface of the core-pulling core presses against the upper surface of the terminal, fixing the height position of the terminal;

[0100] S3: At the predetermined time point after the mold is closed and before the injection molding ends, start the hydraulic cylinder and drive the core-pulling slider to pull the core slightly in a direction perpendicular to the terminal axis, so that the pressing surface of the core is removed from the upper surface of the terminal to a position flush with the surface of the product cavity.

[0101] S4: Injection molding is completed, and the product cools and solidifies;

[0102] S5: Open the mold, eject and remove the product.

[0103] In one embodiment, firstly, the terminal (or conductive sheet) is placed inside the mold cavity; then, after the mold is closed, a hydraulic cylinder pushes a shovel base, which in turn drives a core-pulling mechanism to push the terminal to a preset height; next, before the injection molding machine injects material, the hydraulic cylinder drives the shovel base, which in turn moves the core-pulling mechanism upwards by a preset distance (e.g., 0.8mm) to make it flush with the plane of the product; then, product injection molding is performed; finally, the mold is opened, and the product is ejected by ejector pins. This completes the product injection molding process.

[0104] It should be noted that the specific implementation actions and working processes in the above methods have already been explained in the structural section, so they will not be described again here.

[0105] In summary, the method provided in this application can precisely control the height position of the three terminals during injection molding by adding a slider core-pulling mechanism to the fixed mold side of the mold using a hydraulic cylinder. After mold closing, the core is pushed to the upper surface of the conductive sheet by a shovel base driven by the hydraulic cylinder, and is pulled upward by 0.8mm to be flush with the product surface before the injection is completed.

[0106] The protection scope of the terminal injection method for the slider core-pulling mechanism for terminal injection molding described in this disclosure is not limited to the execution order of the steps listed in this embodiment. Any solution implemented by adding, subtracting, or replacing steps in the prior art based on the principles of this disclosure is included within the protection scope of this disclosure.

[0107] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of modules / units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or units may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or modules or units may be electrical, mechanical, or other forms.

[0108] The modules / units described as separate components may or may not be physically separate. The components shown as modules / units may or may not be physical modules; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules / units can be selected to achieve the objectives of the embodiments of this application, depending on actual needs. For example, the functional modules / units in the various embodiments of this application may be integrated into one processing module, or each module / unit may exist physically separately, or two or more modules / units may be integrated into one module / unit.

[0109] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0110] This embodiment provides an electronic device 80, which includes a memory 82 and a processor 81 coupled to the memory 82 and configured to execute... Figure 8 The terminal injection method is shown in the slide core-pulling mechanism for terminal injection molding.

[0111] This disclosure also provides a computer-readable storage medium. Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing a processor. The program can be stored in a computer-readable storage medium, which is a non-transitory medium, such as random access memory, read-only memory, flash memory, hard disk, solid-state drive, magnetic tape, floppy disk, optical disk, and any combination thereof. The storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (DVD)), or a semiconductor medium (e.g., solid-state drive (SSD)).

[0112] This disclosure also provides a computer program product comprising one or more computer instructions. When the computer instructions are loaded and executed on a computing device, all or part of the processes or functions described in this disclosure are generated. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.

[0113] When the computer program product is executed by a computer, the computer performs the method described in the foregoing method embodiments. The computer program product can be a software installation package; when the foregoing method is required, the computer program product can be downloaded and executed on the computer.

[0114] Additionally, terms such as “first,” “second,” etc., may be used in this document for reference purposes only and are not intended to be limiting. For example, unless the context clearly indicates otherwise, the words “first,” “second,” and other such numerical terms relating to structures or elements do not imply order or sequence.

[0115] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0116] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A slider core-pulling mechanism for terminal injection molding, disposed in a terminal injection mold, characterized in that, include: The hydraulic cylinder is fixedly mounted on the terminal injection mold; The shovel base is rigidly connected to the piston rod of the hydraulic cylinder and is driven by the hydraulic cylinder to reciprocate on the fixed mold; The core-pulling slider is slidably disposed on the fixed mold side of the terminal injection mold and engages with the shovel base through an inclined surface drive to convert the horizontal movement of the shovel base into the vertical movement of the core-pulling slider; The core puller is fixedly mounted on the core puller slider. Its front end has a pressing surface, which is used to press the upper surface of the terminal after mold closing and before injection molding to limit the position of the terminal. In this process, after mold closing and before injection molding, the shovel base drives the core-pulling slider to its position, and then further drives the core-pulling slider to perform a small amount of core pulling in a direction perpendicular to the terminal axis, so that the pressing surface of the core is removed from the upper surface of the terminal to a position flush with the surface of the product cavity, thereby completing the injection molding.

2. The slider core-pulling mechanism for terminal injection molding according to claim 1, characterized in that, The shovel base and the core-pulling slider slide in contact through a mutually cooperating inclined surface structure, so as to convert the vertical or horizontal movement of the shovel base into the core-pulling movement of the core-pulling slider.

3. A slider core-pulling mechanism for terminal injection molding according to claim 1 or 2, characterized in that, The core-pulling slider is provided with a guide groove, the shovel base is slidably embedded in the guide groove, and the shovel base is provided with a driving inclined surface that abuts against the inner wall of the guide groove.

4. A slider core-pulling mechanism for terminal injection molding according to claim 3, characterized in that, The core-pulling slider is also provided with a positioning groove; The number of positioning slots is the same as the number of terminals, and the bottom of each positioning slot has the same coordinates in the height direction.

5. A slider core-pulling mechanism for terminal injection molding according to claim 1, characterized in that, The shape of the pressing surface of the core is adapted to the pressing part on the upper surface of the terminal.

6. A slider core-pulling mechanism for terminal injection molding according to claim 1, characterized in that, Also includes: When the mold is closed, the oil cylinder drives the core-pulling slider to slide through the shovel base, so that the support end face moves to the first position to support the terminal; At a preset time during the injection molding process, the hydraulic cylinder drives the core-pulling slider to retract via the shovel base, causing the support end face to move to a second position. The distance between the second position and the first position corresponds to the target height of the terminal on the product surface. The supporting end face is a forming surface. When the core-pulling slider moves to the second position, the supporting end face is flush with the surface of the product to form part of the product surface.

7. A slider core-pulling mechanism for terminal injection molding according to claim 6, characterized in that, The distance between the first position and the second position is 0.5 mm to 1.0 mm, which is used to form an adhesive layer on the terminal surface and fix its height position; The preset time is the instant before the injection molding is completed, to ensure that the support end face has been removed and the terminal has been height-positioned before the molten plastic fills the cavity.

8. A slider core-pulling mechanism for terminal injection molding according to claim 1, characterized in that, The distance for micro-core pulling is set to 0.8 mm.

9. A terminal injection molding method employing the slider core-pulling mechanism for terminal injection molding as described in claim 1, characterized in that, The method includes: S1: Place several terminals into the preset positions in the mold cavity; S2: Mold closing, the core-pulling slider driven by the shovel base moves the core-pulling core towards the terminal until the pressing surface of the core-pulling core presses against the upper surface of the terminal, fixing the height position of the terminal; S3: At the predetermined time point after the mold is closed and before the injection molding ends, start the hydraulic cylinder and drive the core-pulling slider to pull the core slightly in a direction perpendicular to the terminal axis, so that the pressing surface of the core is removed from the upper surface of the terminal to a position flush with the surface of the product cavity. S4: Injection molding is completed, and the product cools and solidifies; S5: Open the mold, eject and remove the product.

10. An injection mold, characterized in that, It includes a fixed mold, a moving mold, and a slider core-pulling mechanism for terminal injection molding as described in any one of claims 1 to 8.

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