Automobile safety belt locking tongue forming die

Abstract

The application discloses a forming die for a safety belt locking tongue of an automobile, which comprises a die body, a first forming assembly and a second forming assembly, wherein the die body comprises an upper die and a lower die; the first forming assembly comprises a core block and a driving device, the driving device is installed on the lower die, the core block is slidingly arranged on the lower die and is connected with the output end of the driving device, and the core block is used for forming a mounting groove of the locking tongue; and the second forming assembly comprises a transmission structure and a pair of core columns, the core columns are respectively slidingly arranged in the interiors of the two sides of the core block and are used for forming shaft holes of the locking tongue. The application has the beneficial effects that the pair of core columns are arranged in the core block in an extendable and retractable mode, thereby the corresponding forming assemblies are not arranged at the positions of the two sides of the locking tongue product, the occupied space of the die is effectively reduced, meanwhile, the movement of the core block and the extension and retraction actions of the core columns can be simultaneously controlled through one driving device, and the structure and manufacturing cost of the die are simplified.

Description

Technical Field

[0001] This application relates to the field of injection mold technology, and in particular to a mold for forming a locking tongue of an automotive seat belt. Background Technology

[0002] like Figure 1 The diagram shows the structural composition of a car seatbelt locking latch, which consists of a metal latch and a plastic outer shell that encloses the metal latch. The manufacturing process involves first shaping the metal latch, then placing it into an injection mold for secondary injection molding to form the plastic outer shell that surrounds the metal latch.

[0003] like Figure 1 As shown, a mounting groove 102 is provided at the top of the locking tongue 1, and shaft holes 101 are provided on both sides of the mounting groove 102. The two shaft holes 101 are coaxial and pass through the locking tongue 1. Figure 2 As shown, in existing injection molds, the two shaft holes 101 are formed separately using two molding assemblies. Specifically, each molding assembly includes a core post and a hydraulic cylinder that drives the molding shaft. This leads to the following problems: two independent molding assemblies make the mold structure more complex, occupy more space, hinder miniaturization design, and increase manufacturing costs and assembly difficulty. Therefore, how to improve the existing shaft hole molding assemblies to overcome these problems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One of the objectives of this application is to provide a mold for forming the locking tongue of an automotive seat belt.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a mold for forming a locking tongue of an automotive seat belt, comprising a mold body, a first forming component, and a second forming component. The mold body includes an upper mold and a lower mold. The first forming component includes a core block and a driving device. The driving device is installed on the lower mold, and the core block is slidably disposed on the lower mold and connected to the output end of the driving device. The core block is used to form the mounting groove of the locking tongue. The second forming component includes a transmission structure and a pair of core pillars. The core pillars are slidably disposed inside both sides of the core block and are used to form the shaft holes of the locking tongue. The input end of the transmission structure is connected to the output end of the driving device, and the output end of the transmission structure is connected to the core pillars. During demolding, the forming component is adapted to perform two processes under the drive of the driving device. In the first process, the driving device is adapted to drive the core pillars to slide through the transmission structure until they disengage from the shaft holes. In the second process, the core block is adapted to drive the core pillars to move synchronously under the drive of the driving device until they disengage from the mounting groove.

[0006] Preferably, the transmission structure includes a transmission rod and a pair of connecting rods. The transmission rod is slidably disposed within the core block and connected to the output end of the driving device. The two ends of the connecting rod are respectively hinged to the transmission rod and the corresponding core column. During the first process, the transmission rod is adapted to pull the two sets of core columns to move relative to each other and retract into the core block through the connecting rods, at which time the core block remains stationary. During the second process, the transmission rod is adapted to drive the core block to move and demold, at which time the core column and the core block remain relatively stationary.

[0007] Preferably, after mold closing, the axes of the connecting rod and the core column are on the same straight line.

[0008] Preferably, a limiting part is provided inside the core block; after mold closing, the end of the connecting rod abuts against the end of the transmission rod.

[0009] Preferably, the transmission rod is connected to the core block via an elastic element; before mold closing, the core column is adapted to be located within the core block and remain in a contracted state under the elastic force of the elastic element.

[0010] Preferably, the automotive seat belt locking tongue forming mold further includes a limiting component one and a limiting component two. The limiting component two is disposed on the lower mold and cooperates with the upper mold, while the limiting component one is disposed on the lower mold and cooperates with the core block. After the mold is closed, the limiting component two is adapted to lock and limit the upper mold and the lower mold; the limiting component one is adapted to lock and limit the core block.

[0011] Preferably, the second limiting component includes a second limiting rod and a limiting groove disposed on the outside of the upper mold. The second limiting rod is slidably disposed on the lower mold and its first end is connected to the output end of the driving device. When the upper mold and the lower mold are locked, the second end of the second limiting rod engages with the limiting groove. During the first process, the driving device is adapted to drive the limiting rod to move until it separates from the limiting groove.

[0012] Preferably, the second limiting component includes a second limiting rod and a limiting groove disposed on the outside of the upper mold. The second limiting rod is elastically rotatably mounted on the lower mold at its bottom end. When the upper mold and the lower mold are locked, the top end of the limiting rod engages with the limiting groove, and the limiting rod is in a vertical state. During the first process, the output end of the driving device is adapted to press the middle part of the limiting rod, so that the limiting rod rotates along its bottom end until it disengages from the limiting groove.

[0013] Preferably, the limiting component one includes a limiting rod one, which is vertically and elastically slidably installed on the bottom end of the upper mold; after the mold is closed, the bottom end of the limiting rod one abuts against the top end of the core block.

[0014] Preferably, the first molding component is inclinedly disposed on the lower mold, and a limiting block is provided at the top of the core block; after the mold is closed, the bottom end of the limiting rod engages with the limiting block in a wedge-shaped compression fit.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] (1) This application effectively reduces the overall space occupied by the mold by telescopically setting a pair of core pillars inside the core block, thus eliminating the need for corresponding molding components on both sides of the locking tongue product, which is conducive to the miniaturization of the mold design. At the same time, the movement of the core block and the telescopic movement of the core pillars can be controlled simultaneously by a single drive device, simplifying the mold structure and reducing the manufacturing cost and assembly difficulty of the mold. In addition, both adopt a purely mechanical transmission and coordination, avoiding the problems of poor synchronization and high maintenance costs that may be caused by using multiple sets of hydraulic or pneumatic components, and improving the stability and reliability of mold operation.

[0017] (2) By setting limit component one and limit component two, this application enables the mold to be demolded strictly in the set order when the mold is opened, which effectively avoids mold interference or product damage caused by disordered demolding order. Moreover, the whole process is achieved through the cooperation of pure mechanical structure, without the need for complex sensors and control systems, which not only reduces the manufacturing cost and maintenance difficulty of the mold, but also significantly improves the stability and reliability of the mold operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the locking tongue product structure;

[0019] Figure 2 This is a schematic diagram of the installation structure of the shaft hole forming component in an existing mold;

[0020] Figure 3 This is a schematic diagram of the overall structure of the two-component prefabricated assembly of the present invention;

[0021] Figure 4 This is a schematic diagram of the specific structure of the second molding component of the present invention;

[0022] Figure 5 This is a schematic diagram illustrating the working principle of the second molding component of the present invention;

[0023] Figure 6 This is a schematic diagram of the mold body of the present invention in the state when the mold is closed;

[0024] Figure 7 This is a schematic diagram illustrating the working principle of the second limiting component of the present invention when it is unlocked;

[0025] Figure 8 This is a schematic diagram illustrating the working principle of the mold opening and core pulling of the present invention.

[0026] In the diagram: 1. Locking tongue; 101. Shaft hole; 102. Mounting groove; 2. First forming component; 201. Core block; 202. Drive device; 3. Second forming component; 301. Transmission structure; 3011. Transmission rod; 3012. Connecting rod; 302. Core column; 4. Core part; 5. Elastic part; 6. Limiting part; 7. Limiting component one; 701. Limiting rod one; 8. Limiting component two; 801. Limiting rod two; 802. Limiting groove; 9. Mold body; 901. Upper mold; 902. Lower mold; 10. Limiting block. Detailed Implementation

[0027] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0029] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0030] One preferred embodiment of this application, such as Figures 1 to 8As shown, a mold for forming a locking tongue of an automotive seat belt includes a mold body 9, a first forming component 2, and a second forming component 3. The mold body 9 includes an upper mold 901 and a lower mold 902. The first forming component 2 includes a core block 201 and a driving device 202. The driving device 202 is installed on the lower mold 902. The core block 201 is slidably disposed on the lower mold 902 and is connected to the output end of the driving device 202. The core block 201 is used to form the mounting groove 102 of the locking tongue 1. The first forming component 2 includes a transmission structure 301 and a pair of core pillars 302. The core pillars 302 are slidably disposed inside the two sides of the core block 201 and are used to form the shaft hole 101 of the locking tongue 1. The input end of the transmission structure 301 is connected to the output end of the driving device 202, and the output end of the transmission structure 301 is connected to the core pillars 302.

[0031] Understandably, during demolding, the two molding components undergo two sequential processes under the action of the drive device 202. In the first process, the drive device 202 drives the core pillar 302 to slide through the transmission structure 301 until it disengages from the shaft hole 101. During this process, the core block 201 remains stationary so that the core pillar 302 can demold from the shaft hole 101 before the core block 201, preventing damage caused by the core block 201 moving the core pillar 302. After the core pillar 302 completely disengages from the shaft hole 101, the second process begins: the core block 201, driven by the drive device 202, moves the retracted core pillar 302 synchronously until it disengages from the mounting groove 102. This step-by-step demolding design effectively ensures the structural integrity of the locking tongue 1 during demolding, preventing product deformation or damage due to forced demolding.

[0032] Therefore, this application effectively reduces the overall space occupied by the mold by telescopically mounting a pair of core pillars 302 within the core block 201, thus eliminating the need for corresponding molding components on both sides of the locking tongue 1, which is beneficial for miniaturizing the mold design. Simultaneously, the movement of the core block 201 and the telescopic movement of the core pillars 302 can be controlled by a single drive device 202, simplifying the mold structure and reducing manufacturing costs and assembly difficulty. Furthermore, the use of purely mechanical transmission avoids the problems of poor synchronization and high maintenance costs that may result from using multiple hydraulic or pneumatic components, improving the stability and reliability of mold operation.

[0033] It should be noted that the specific structure and working principle of the drive device 202 are well known to those skilled in the art, and therefore will not be described in detail here. Common drive devices 202 include hydraulic cylinders, pneumatic cylinders and linear motors, etc., while hydraulic cylinders are preferred in the mold field.

[0034] As a further description of the above embodiment: the transmission structure 301 includes a transmission rod 3011 and a pair of connecting rods 3012. The transmission rod 3011 is slidably disposed in the core block 201 and connected to the output end of the drive device 202. The two ends of the connecting rod 3012 are respectively hinged to the transmission rod 3011 and the corresponding core post 302.

[0035] It is understandable that, such as Figure 5 As shown in the diagram below, during the first process, the drive device 202 moves the transmission rod 3011 downwards. The transmission rod 3011 then acts on a pair of connecting rods 3012, which in turn pull the two sets of core pillars 302 closer together until they retract into the core block 201, thus completing the demolding of the core pillars 302. It should be noted that the core block 201 remains stationary throughout this process. After the core pillars 302 are demolded, the transmission rod 3011 slides relative to the core block 201 to its limit position, and the piston end of the drive device 202 also slides relative to the core block 201 to its limit position. Therefore, when the drive device 202 continues to operate, the subsequent second process begins, where the transmission rod 3011 moves the core block 201 synchronously to demold, while the core pillars 302 and the core block 201 remain relatively stationary.

[0036] Further optimization, such as Figure 5 As shown in the diagram above, in the mold-closed state, the axes of connecting rod 3012 and core post 302 are on the same straight line. This collinear arrangement allows the force exerted by connecting rod 3012 on core post 302 to be transmitted entirely along the axial direction of core post 302, thus forming a self-locking state on core post 302. This effectively prevents displacement of core post 302 due to the pressure of the plastic melt during injection molding, ensuring the molding accuracy of shaft hole 101. When demolding is required for the first process, drive device 202 drives transmission rod 3011 to move, causing the axes of connecting rod 3012 and core post 302 to no longer be collinear. The self-locking state is released, and connecting rod 3012 can then smoothly drive core post 302 to retract.

[0037] Further optimization, to ensure the stability of self-locking mold closing, such as... Figure 5 As shown in the figure above, a limiting part 6 can be provided inside the core block 201. Specifically, the limiting part 6 can be a protrusion structure or a groove structure on the inner wall of the core block 201. After mold closing, the end of the connecting rod 3012 abuts against the end of the transmission rod 3011, further improving the positioning accuracy and stability of the core column 302 during mold closing.

[0038] Preferably, the transmission rod 3011 can be connected to the core block 201 via an elastic element 5 (e.g., a spring). It is understood that before mold closing, the core pillar 302 is adapted to be positioned within the core block 201 and remain in a retracted state under the elastic force of the elastic element 5. The advantage of this arrangement is that when the mold is in the open state or in the initial stage of mold closing, the core pillar 302 will not protrude outside the core block 201. At this time, the drive device 202 will drive the retracted core pillar 302 to move synchronously with the core block 201. When the core block 201 is in the closed position, it will stop, and then the drive device 202 will drive the transmission rod 3011 to move and overcome the elastic force of the elastic element 5, and push the core pillar 302 out of the core block 201 via the connecting rod 3012, so that it reaches the required position of the forming shaft hole 101.

[0039] Based on the above embodiments, the following problems still exist in its specific use: During the first process of mold opening, the core block 201 is kept stationary by the adhesive force between it and the locking tongue 1, but this method has poor stability. Additionally, as... Figure 3 As shown, other core components 4 are also installed in the upper mold 901. These core components 4 are used to form other slots within the mounting groove 102, and the core pillar 302 will pass through this core component 4 when the mold is closed. Therefore, the order of mold opening is particularly important. It is essential to ensure that the core pillar 302 is demolded first while the core component 4 remains stationary. Otherwise, the core pillar 302 may interfere with or collide with the core component 4, causing mold damage. In short, the core pillar 302 must be demolded first before the upper mold 901 and lower mold 902 can be opened. However, existing technologies use sensors and control systems to achieve this sequential control, which not only increases the complexity and cost of the mold but also carries the risk of signal delays or malfunctions leading to sequence errors.

[0040] To address the aforementioned issues, this application utilizes a purely mechanical structure by setting limit component 7 and limit component 8 to achieve precise control of the mold opening sequence. This eliminates the need for sensors and control systems, improving the reliability of mold operation and reducing costs. Specifically, limit component 8 is located in the lower mold 902 and cooperates with the upper mold 901 to restrict the separation of the upper mold 901 and lower mold 902 before the core pillar 302 completes demolding. Limit component 7 is located in the upper mold 901 and cooperates with the core block 201 to restrict the movement of the core block 201 before the core pillar 302 completes demolding.

[0041] Specifically, in the mold-closed state, the second limiting component 8 locks the upper mold 901 and the lower mold 902, preventing the upper mold 901 from moving upward relative to the lower mold 902; at the same time, the first limiting component 7 applies downward pressure or limiting action to the core block 201, thereby locking the core block 201.

[0042] In one embodiment of this application, such as Figure 6 and Figure 7 As shown, the limiting component 7 includes a limiting rod 701, which is vertically and elastically slidably mounted on the bottom end of the upper mold 901. After the mold is closed, the bottom end of the limiting rod 701 abuts against the top end of the core block 201, which can effectively limit the upward movement of the core block 201 before the core post 302 is demolded, ensuring that the core block 201 remains stable and stationary during the first process, that is, during the process of the core post 302 disengaging from the shaft hole 101.

[0043] like Figure 1 As shown, when the locking tongue 1 is placed horizontally, its mounting groove 102 is inclined at the top of the product. Therefore, the corresponding first molding component 2 also needs to be inclined on the lower mold 902, so that the top surface of the core block 201 is inclined. In order to ensure that the limiting rod 701 can always stably press against the top of the core block 201 in the mold closing state, a limiting block 10 can be provided at the top of the core block 201. When the mold is closed, the bottom end of the limiting rod 701 and the limiting block 10 are wedge-shaped and squeezed together. This allows the core block 201 to always be subjected to the downward pressure provided by the limiting rod 701 in the mold closing direction, further enhancing the static stability of the core block 201 in the first process of mold closing and core column 302 demolding.

[0044] This application does not specifically limit the structure of the limiting component 8. The following two specific embodiments are provided for reference:

[0045] Example 1: As Figures 6 to 8 As shown, the limiting component 2 8 includes a limiting rod 2 801 and a limiting groove 802 disposed on the outside of the upper mold 901. The limiting rod 2 801 is slidably disposed on the lower mold 902 and its first end is connected to the output end of the driving device 202.

[0046] Understandably, in the mold-closed state, the second end of the limiting rod 801 engages with the limiting groove 802, thereby locking the upper mold 901 and the lower mold 902 and preventing the upper mold 901 from moving upward before the core pillar 302 has completed demolding. When the drive device 202 starts to perform the first process, that is, when the drive transmission rod 3011 moves to drive the core pillar 302 to retract, the output end of the drive device 202 will simultaneously drive the limiting rod 801 to slide away from the limiting groove 802. After the core pillar 302 is completely retracted into the core block 201, that is, after the first process is completed, the second end of the limiting rod 801 is exactly completely disengaged from the limiting groove 802. At this time, the lock between the upper mold 901 and the lower mold 902 is released, and the upper mold 901 can then move upward in the subsequent mold opening action. This design, through the same action of the drive device 202, achieves the synchronous release of the demolding of the core pillar 302 and the locking of the upper mold 901, ensuring the accuracy of the mold opening sequence.

[0047] Example 2 (not shown): Limiting component 2 8 includes limiting rod 2 801 and limiting groove 802 disposed on the outside of upper mold 901. The bottom end of limiting rod 2 801 can be elastically rotated and installed on lower mold 902 by torsion spring.

[0048] Understandably, in the mold-closed state, the top of the second limiting rod 801 is engaged in the limiting groove 802 under the elastic force of the torsion spring, thus locking the upper mold 901 and the lower mold 902. When it is necessary to unlock, a lever structure provided on the lower mold 902, i.e., the driving device 202, will drive the lever to press the middle position of the second limiting rod 801, thereby causing the second limiting rod 801 to overcome the elastic force of the torsion spring and rotate downward and disengage from the limiting groove 802, thereby releasing the lock between the upper mold 901 and the lower mold 902.

[0049] It should be noted that when using Example 1, such as Figure 6 As shown, because the first molding component 2 is inclined, the second end of the limiting rod 801, which is engaged and limited, is also inclined. Since locking the mold requires a vertical limiting force, this limiting method lacks stability and is prone to damage to the limiting rod 801 under stress. However, its structure is simple and its manufacturing cost is low. In embodiment two, the limiting rod 801 is vertical, and its cooperation with the limiting groove 802 provides a more stable vertical limiting force, effectively preventing damage to the limiting rod 801 due to inclined stress. This improves the structural stability and service life of the limiting component 8. However, its structure is more complex than that of embodiment one, and the assembly difficulty is slightly increased. In practical applications, a suitable embodiment of the limiting component 8 can be selected based on the specific usage environment of the mold, cost budget, and stability requirements.

[0050] The working principle of this invention is as follows:

[0051] 1. First of all, as Figure 6 As shown, this is the initial state of mold closing. The output end of the drive device 202 is in the extended state, and both limiting components are in the locked state within the mold. Specifically, limiting rod one 701 abuts against the limiting block 10 at the top of the core block 201, and the second end of limiting rod two 801 engages in the limiting groove 802 on the outside of the upper mold 901, locking the upper mold 901 and lower mold 902. 2. After injection molding is completed, the demolding stage begins. First, the drive device 202 is started, causing its output end to retract. During the first stage of demolding, as... Figure 5 As shown, the drive device 202 drives the transmission rod 3011 to move downwards. The transmission rod 3011, through the connecting rod 3012, pulls the core column 302 to retract into the core block 201. At this time, the core block 201 remains locked and stationary under the action of the limiting component 7. Meanwhile, as... Figure 7As shown, when the output end of the drive device 202 retracts, it synchronously drives the second limiting rod 801 to slide away from the limiting groove 802, thereby separating the second limiting rod 801 from the limiting groove 802 and releasing the lock between the upper mold 901 and the lower mold 902. 3. Entering the second process of demolding, as follows Figure 8 As shown, at this point, the mold can perform the opening action of the upper mold 901 and the lower mold 902, thereby releasing the limiting lock on the core block 201. 4. Process III, as follows Figure 8 As shown, the output end of the start drive device 202 continues to retract. At this time, the transmission rod 3011 has slid to the limit position relative to the core block 201. The retraction force of the drive device 202 will drive the core block 201 to move as a whole. That is, the core block 201 moves synchronously with the core column 302 and leaves the product's mounting groove 102. The formed locking tongue 1 can then be removed under the action of the ejector mechanism.

[0052] Therefore, the mold of this application can strictly follow the sequence of "core post 302 demolding first → upper mold 901 separating from lower mold 902 → core block 201 demolding later" during mold opening, effectively avoiding mold interference or product damage caused by disordered demolding sequence. The entire process is achieved through a purely mechanical structure, without the need for complex sensors and control systems, which not only reduces the manufacturing cost and maintenance difficulty of the mold, but also significantly improves the stability and reliability of mold operation.

[0053] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A mold for forming a locking tongue of an automotive seatbelt, characterized in that, include: The mold body includes an upper mold and a lower mold; A first molding assembly, comprising a core block and a driving device, wherein the driving device is mounted on the lower mold, the core block is slidably disposed on the lower mold and connected to the output end of the driving device, and the core block is used to form a mounting groove for the locking tongue; and The second molding assembly includes a transmission structure and a pair of core posts. The core posts are slidably disposed inside the two sides of the core block and are used to form the shaft holes of the locking tongue. The input end of the transmission structure is connected to the output end of the drive device, and the output end of the transmission structure is connected to the core posts. During demolding, the molding assembly is adapted to perform two processes under the drive of the drive device, wherein in the first process, the drive device is adapted to drive the core column to slide through the transmission structure until it disengages from the shaft hole; and in the second process, the core block is adapted to drive the core column to move synchronously under the drive of the drive device until it disengages from the mounting slot. The transmission structure includes a transmission rod and a pair of connecting rods. The transmission rod is slidably disposed within the core block and connected to the output end of the driving device. The two ends of the connecting rod are respectively hinged to the transmission rod and the corresponding core column. During the first process, the transmission rod is adapted to pull the two sets of core columns to move relative to each other and retract into the core block through the connecting rods, at which time the core block remains stationary. During the second process, the transmission rod is adapted to drive the core block to move and demold, at which time the core column and the core block remain relatively stationary. After the mold is closed, the axes of the connecting rod and the core column are on the same straight line; The core block is provided with a limiting part; after the mold is closed, the end of the connecting rod abuts against the end of the transmission rod. The automotive seat belt locking tongue forming mold further includes a limiting component one and a limiting component two. The limiting component two is disposed on the lower mold and cooperates with the upper mold, while the limiting component one is disposed on the lower mold and cooperates with the core block. After the mold is closed, the limiting component two is adapted to lock and limit the upper mold and the lower mold; the limiting component one is adapted to lock and limit the core block. The limiting component includes a limiting rod, which is vertically and elastically slidably mounted on the bottom end of the upper mold; after the mold is closed, the bottom end of the limiting rod abuts against the top end of the core block.

2. The automotive seatbelt locking tongue forming mold as described in claim 1, characterized in that: The transmission rod is connected to the core block via an elastic element; before mold closing, the core column is adapted to be located within the core block and remain in a contracted state under the elastic force of the elastic element.

3. The automotive seatbelt locking tongue forming mold as described in claim 1 or 2, characterized in that: The second limiting component includes a second limiting rod and a limiting groove disposed on the outside of the upper mold. The second limiting rod is slidably disposed on the lower mold and its first end is connected to the output end of the driving device. When the upper mold and the lower mold are locked, the second end of the second limiting rod engages with the limiting groove; during the first process, the driving device is adapted to drive the limiting rod to move until it separates from the limiting groove.

4. The automotive seatbelt locking tongue forming mold as described in claim 1 or 2, characterized in that: The second limiting component includes a second limiting rod and a limiting groove disposed on the outside of the upper mold. The second limiting rod is elastically rotatably mounted on the lower mold at its bottom end. When the upper mold and the lower mold are locked, the top end of the limiting rod engages with the limiting groove, and the limiting rod is in a vertical state; during the first process, the output end of the driving device is adapted to press the middle of the limiting rod, so that the limiting rod rotates along the bottom end until it disengages from the limiting groove.

5. The automotive seatbelt locking tongue forming mold as described in claim 1, characterized in that: The first molding component is inclinedly disposed on the lower mold, and a limiting block is provided at the top of the core block; after the mold is closed, the bottom end of the limiting rod engages with the limiting block in a wedge-shaped compression fit.

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